阅读说明：本技术 一种丁腈橡胶改性沥青防水卷材涂盖层胶料制备方法 (Preparation method of nitrile rubber modified asphalt waterproof coiled material coating rubber material ) 是由 杨继海 王聪迪 郭阳 吴帅 缪线生 曹进明 于 2021-08-27 设计创作，主要内容包括：本发明提供一种丁腈橡胶改性沥青防水卷材涂盖层胶料制备方法,包括如下步骤：S1.沥青顺酐化：将沥青预热,加入顺丁烯二酸酐反应,获得顺酐化沥青；S2.丁腈橡胶改性沥青：往顺酐化沥青中加入液体异戊橡胶和芳烃油,再加入粉末丁腈橡胶,搅拌得混合液；混合液剪切后加入硫磺粉、四苄基二硫化秋兰姆、氧化锌、防老剂和纳米二氧化硅,反应完后出料；S3.制备防水卷材涂盖层胶料。本发明可使丁腈橡胶均匀稳定分散于沥青中,检测改性沥青离析程度,48h离析软化点差小于3℃。由此制备的丁腈橡胶改性沥青防水卷材,比常规的改性沥青防水卷材,卷材与卷材剥离强度提高0.8N/mm以上,卷材与铝板剥离强度提高0.6N/mm以上,卷材与水泥砂浆剥离强度提高0.3N/mm以上。(The invention provides a preparation method of a coating rubber material of a nitrile rubber modified asphalt waterproof coiled material, which comprises the following steps: s1, asphalt anhydrization: preheating asphalt, and adding maleic anhydride to react to obtain maleic anhydridized asphalt; s2, nitrile rubber modified asphalt: adding liquid isoprene rubber and aromatic oil into the maleic anhydride asphalt, adding powdered nitrile rubber, and stirring to obtain a mixed solution; after the mixed solution is sheared, adding sulfur powder, tetrabenzylthiuram disulfide, zinc oxide, an anti-aging agent and nano silicon dioxide, and discharging after the reaction is finished; and S3, preparing a waterproof coiled material coating rubber material. The invention can ensure that the nitrile rubber is uniformly and stably dispersed in the asphalt, and the segregation degree of the modified asphalt is detected, wherein the segregation softening point difference is less than 3 ℃ within 48 hours. Compared with the conventional modified asphalt waterproof coiled material, the peel strength of the coiled material and the coiled material is improved by more than 0.8N/mm, the peel strength of the coiled material and an aluminum plate is improved by more than 0.6N/mm, and the peel strength of the coiled material and cement mortar is improved by more than 0.3N/mm.)

1. A preparation method of a nitrile rubber modified asphalt waterproof coiled material coating rubber material is characterized by comprising the following steps:

s1, asphalt anhydrization: preheating asphalt, and adding maleic anhydride to react to obtain maleic anhydridized asphalt;

s2, nitrile rubber modified asphalt: adding liquid isoprene rubber and aromatic oil into the maleic anhydridized asphalt, adding powdered nitrile rubber, and uniformly stirring to obtain a mixed solution; after the mixed solution is sheared, adding sulfur powder, tetrabenzylthiuram disulfide, zinc oxide, an anti-aging agent and nano silicon dioxide, and discharging after the reaction is finished;

and S3, preparing a waterproof coiled material coating rubber material.

2. The preparation method of the nitrile rubber modified asphalt waterproof coiled material coating rubber compound according to claim 1, which is characterized in that,

s3, preparing a waterproof coiled material coating layer sizing material:

s31, heating the nitrile rubber modified asphalt prepared in the step S2 to 120-180 ℃, adding SBS and SBR, heating to 160-230 ℃, and stirring for 30-240 min;

s32, adding rubber powder, and stirring at the temperature of 160 ℃ and 230 ℃ for 30-240 min;

s33, shearing for 30-120 min;

s34, adding the filler and stirring until the filler is uniformly dispersed.

3. The preparation method of the nitrile rubber modified asphalt waterproof coiled material coating layer rubber compound according to claim 1, wherein S1, asphalt maleic anhydride:

s11, heating the petroleum asphalt to 120 +/-10 ℃;

s12, adding maleic anhydride with the weight of 0.5-8% of that of the petroleum asphalt, stirring and heating to 160 +/-20 ℃;

s13, continuously stirring for 150 +/-60 min to complete the preparation of the paraanhydrized asphalt.

4. The preparation method of the coating rubber material for the nitrile rubber modified asphalt waterproof coiled material according to claim 1, wherein S2. nitrile rubber modified asphalt:

s21, heating the anhydrified asphalt prepared in the S1 to over 160 ℃;

s22, adding liquid isoprene rubber and aromatic oil;

s23, adding powdered nitrile butadiene rubber and stirring for 60-180 min;

s24, shearing for 30-120 min;

s25, adding sulfur powder, tetrabenzylthiuram disulfide, zinc oxide, an anti-aging agent and nano silicon dioxide;

s26, shearing for 30-120min to finish preparation;

wherein the raw materials comprise the following components in parts by weight: 100 parts of maleic anhydridized asphalt, 1-6 parts of liquid isoprene rubber, 4-17 parts of aromatic oil, 0.5-5 parts of powdered nitrile rubber, 0.15-3 parts of sulfur powder, 0.03-3 parts of tetrabenzylthiuram disulfide, 0.1-5 parts of zinc oxide, 0.05-2 parts of anti-aging agent and 0.5-4 parts of nano silicon dioxide.

5. The preparation method of the coating rubber material for the nitrile rubber modified asphalt waterproof coiled material according to claim 1, wherein the nitrile rubber modified asphalt comprises the following components in parts by weight:

100 portions of maleic anhydridized asphalt

1-6 parts of liquid isoprene rubber

4-17 parts of aromatic oil

0.5-5 parts of powdered nitrile rubber

0.15-3 parts of sulfur powder

0.03-3 parts of tetrabenzyl thiuram disulfide

0.1-5 parts of zinc oxide

0.05 to 2 portions of anti-aging agent

0.5-4 parts of nano silicon dioxide.

6. The preparation method of the nitrile rubber modified asphalt waterproof coiled material coating rubber material according to claim 5, wherein the nitrile rubber modified asphalt comprises the following components in parts by weight:

100 portions of maleic anhydridized asphalt

Liquid isoprene rubber 4 parts

Aromatic oil 10 parts

Powdered nitrile-butadiene rubber 4 parts

1 part of sulfur powder

0.5 part of tetrabenzylthiuram disulfide

2 portions of zinc oxide

2 portions of anti-aging agent

And 1 part of nano silicon dioxide.

7. The preparation method of the nitrile rubber modified asphalt waterproof coil coating rubber compound according to claim 2, wherein the waterproof coil coating rubber compound is prepared from the following raw materials in parts by weight:

8. the preparation method of the nitrile rubber modified asphalt waterproof coil coating rubber compound according to claim 7, wherein the waterproof coil coating rubber compound is prepared from the following raw materials in parts by weight:

9. the preparation method of the nitrile rubber modified asphalt waterproof coiled material coating layer rubber compound as claimed in claim 7 or 8, wherein the mesh number of the rubber powder is 100-200 meshes, the filler comprises barium sulfate, calcium carbonate, titanium dioxide and kaolin, and the mesh number of the filler is more than 300 meshes.

10. The coating rubber of nitrile rubber modified asphalt waterproof coiled material and the waterproof coiled material prepared by the method for preparing the coating rubber of nitrile rubber modified asphalt waterproof coiled material of any one of claims 1 to 9.

Technical Field

The invention belongs to the technical field of waterproof coiled materials, and particularly relates to a preparation method of a coating rubber material for a nitrile rubber modified asphalt waterproof coiled material.

Background

The waterproof coiled material is mainly used for building walls, roofs, tunnels, highways, refuse landfills and the like, can resist external rainwater and underground water seepage, can be rolled into a roll-shaped flexible building material product, is used as a leakage-free connection between an engineering foundation and a building, is a first barrier for waterproofing of the whole engineering, and plays a vital role in the whole engineering. The modified asphalt waterproof coiled material is mainly prepared by using rubber modified petroleum asphalt as a coating layer, using polyester fiber non-woven fabric, jute cloth, glass fiber felt and the like as a base respectively, using a plastic film as an anti-sticking isolating layer and carrying out the working procedures of material selection, material proportioning, co-melting, dipping, composite forming, curling and the like. Nitrile-butadiene rubber (NBR), a copolymer polymerized from acrylonitrile and butadiene monomers, has strong adhesion and can improve peel strength when used as an asphalt modifier. The nitrile rubber is rarely used as an asphalt modifier in the current stage of the modified asphalt waterproof coiled material, mainly because the nitrile rubber is difficult to uniformly disperse in asphalt and the prepared nitrile rubber modified asphalt has poor storage stability.

CN201711276410.9 discloses a rubber emulsified asphalt waterproof paint which is prepared from the following raw materials in parts by weight: 80-100 parts of nitrile rubber, 1-10 parts of rosin acid soap, 40-60 parts of asphalt, 10-15 parts of synthetic alcohol, 1-5 parts of sodium alkyl benzene sulfonate, 1-5 parts of sodium hydroxide, 1-3 parts of polyvinyl alcohol and 60-80 parts of water. S1, mixing and stirring nitrile rubber, rosin acid soap and water uniformly to form a glue solution, wherein the pH value of the solution is 8-9 for later use; s2, heating and melting the asphalt, adding the synthetic alcohol, sodium alkyl benzene sulfonate, sodium hydroxide and the rest water, and fully and uniformly stirring to obtain asphalt emulsion; s3, mixing and stirring the asphalt emulsion and the glue solution uniformly, finally adding polyvinyl alcohol, stirring for 5-10min to emulsify the mixture, and then cooling to about 45 ℃ under slow stirring to obtain the rubber emulsified asphalt waterproof coating. The rubber emulsified asphalt waterproof coating material has a large amount of nitrile rubber, forms a rubber emulsion, and is not used as a modifier for asphalt.

CN201710954738.5 discloses a modified asphalt, which has the technical scheme that the modified asphalt is composed of, by weight, 145 parts of matrix asphalt 130-containing materials, 18-23 parts of styrene-butadiene-styrene block copolymers, 12-14 parts of ethylene modified polymers, 5.5-6.5 parts of polyvinyl acetate, 10-15 parts of reinforcing fibers, 10-15 parts of tackifiers, 2-6 parts of polyethyleneimine, 13-17 parts of nitrile rubber powder and 4-6 parts of dimethyl silicone oil, has the advantages of good elasticity, good shock resistance and crack resistance and good plastic deformation resistance, and is suitable for paving various road surfaces. According to the technical scheme, the nitrile rubber is adopted, and the nitrile rubber powder is good in sun resistance and weather resistance, so that the modified asphalt has excellent sun resistance and weather resistance, but the nitrile rubber powder is not good in dispersity in an asphalt sizing material and is easy to separate.

Therefore, the nitrile rubber modified asphalt with uniform dispersion and good storage stability needs further research of technical personnel.

Disclosure of Invention

The invention aims to provide a preparation method of a coating rubber material for a nitrile rubber modified asphalt waterproof coiled material.

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

a preparation method of a nitrile rubber modified asphalt waterproof coiled material coating rubber material comprises the following steps:

s1, asphalt anhydrization: preheating asphalt, and adding maleic anhydride to react to obtain maleic anhydridized asphalt;

s2, nitrile rubber modified asphalt: adding liquid isoprene rubber and aromatic oil into the maleic anhydridized asphalt, adding powdered nitrile rubber, and uniformly stirring to obtain a mixed solution; after the mixed solution is sheared, adding sulfur powder, tetrabenzylthiuram disulfide, zinc oxide, an anti-aging agent and nano silicon dioxide, and discharging after the reaction is finished;

and S3, preparing a waterproof coiled material coating rubber material.

The invention adopts maleic anhydride to modify asphalt, the maleic anhydride is a good grafting monomer and reacts with the asphalt to be grafted on the asphalt, and the compatibility of the asphalt and the nitrile rubber is obviously improved. Meanwhile, liquid isoprene rubber is used as a solvent, so that the compatibility of the asphalt and the nitrile rubber is improved. The aromatic oil improves the low-temperature performance, the vulcanization system mainly comprises sulfur powder, tetrabenzylthiuram disulfide and zinc oxide, so that the nitrile rubber is vulcanized, the vulcanized nitrile rubber can improve the peel strength of asphalt and the storage stability, and the addition of the anti-aging agent and the nano silicon dioxide improves the aging resistance of the asphalt rubber material.

In the invention, the preparation steps are further optimized as follows:

s1, asphalt anhydrization:

s11, heating the petroleum asphalt to 120 +/-10 ℃;

s12, adding maleic anhydride with the weight of 0.5-8% of that of the petroleum asphalt, stirring and heating to 160 +/-20 ℃;

s13, continuously stirring for 150 +/-60 min to complete the preparation of the paraanhydrized asphalt.

Through experimental research, the addition amount of maleic anhydride, the reaction temperature and the reaction time are optimized, the maleic anhydride is successfully grafted on the asphalt, the grafting rate is high, and the compatibility of the asphalt and the nitrile rubber is improved.

S2, nitrile rubber modified asphalt:

s21, heating the anhydrified asphalt prepared in the S1 to over 160 ℃;

s22, adding liquid isoprene rubber and aromatic oil;

s23, adding powdered nitrile butadiene rubber and stirring for 60-180 min;

s24, shearing for 30-120 min;

s25, adding sulfur powder, tetrabenzylthiuram disulfide, zinc oxide, an anti-aging agent and nano silicon dioxide;

s26, shearing for 30-120min to finish preparation;

wherein the raw materials comprise the following components in parts by weight: 100 parts of maleic anhydridized asphalt, 1-6 parts of liquid isoprene rubber, 4-17 parts of aromatic oil, 0.5-5 parts of powdered nitrile rubber, 0.15-3 parts of sulfur powder, 0.03-3 parts of tetrabenzylthiuram disulfide, 0.1-5 parts of zinc oxide, 0.05-2 parts of anti-aging agent and 0.5-4 parts of nano silicon dioxide.

Through experimental research, the raw material selection and the dosage of the nitrile rubber modified asphalt are optimized, the reaction temperature and the reaction time are correspondingly adjusted, and the obtained nitrile rubber modified asphalt has good performance. The anti-aging agent is added to improve the aging resistance of the asphalt rubber material, and the nano silicon dioxide is added to improve the physical property and the thermal stability of the asphalt rubber material.

S3, preparing a waterproof coiled material coating layer sizing material:

s31, heating the nitrile rubber modified asphalt prepared in the step S2 to 120-180 ℃, adding SBS and SBR, heating to 160-230 ℃, and stirring for 30-240 min;

s32, adding rubber powder, and stirring at the temperature of 160 ℃ and 230 ℃ for 30-240 min;

s33, shearing for 30-120 min;

s34, adding the filler and stirring until the filler is uniformly dispersed.

The waterproof coiled material coating rubber material is prepared by adding SBS and SBR on the basis of modified asphalt, fully swelling SBS and SBR in the asphalt under high temperature modification, increasing the viscosity of the rubber material, and adding rubber powder and filler to make the rubber material full and firm after film forming. The reaction temperature and the reaction time are adjusted in a targeted manner during preparation, so that the reaction is completely high in controllability.

In the present invention, preferably, the nitrile rubber modified asphalt comprises, by weight:

100 portions of maleic anhydridized asphalt

1-6 parts of liquid isoprene rubber

4-17 parts of aromatic oil

0.5-5 parts of powdered nitrile rubber

0.15-3 parts of sulfur powder

0.03-3 parts of tetrabenzyl thiuram disulfide

0.1-5 parts of zinc oxide

0.05 to 2 portions of anti-aging agent

0.5-4 parts of nano silicon dioxide.

Further preferably, the nitrile rubber modified asphalt comprises the following components in parts by weight:

100 portions of maleic anhydridized asphalt

Liquid isoprene rubber 4 parts

Aromatic oil 10 parts

Powdered nitrile-butadiene rubber 4 parts

1 part of sulfur powder

0.5 part of tetrabenzylthiuram disulfide

2 portions of zinc oxide

2 portions of anti-aging agent

And 1 part of nano silicon dioxide.

The raw material selection and the dosage of the nitrile rubber modified asphalt are obtained after the inventor consults a large number of literatures and experimental researches, wherein the inventor finds that the liquid isoprene rubber can improve the compatibility of the asphalt and the nitrile rubber, and is a specific selection, and the selection of a vulcanization system and the dosage of each component are also designed aiming at the powder nitrile rubber.

In the invention, preferably, the waterproof coil coating rubber compound is prepared from the following raw materials in parts by weight:

100 portions of nitrile rubber modified asphalt

1.5 to 8.5 portions of SBS

0.5-7 parts of SBR

1-20 parts of rubber powder

15-40 parts of a filler.

Further preferably, the waterproof coil coating rubber material is prepared from the following raw materials in parts by weight:

100 portions of nitrile rubber modified asphalt

SBS 3.5 parts

SBR 1.5 parts

Rubber powder 5 parts

And 26 parts of a filler.

The formula of the waterproof coiled material coating rubber material adopts the conventional formula in the field, and particularly, aiming at the nitrile rubber modified asphalt developed by the invention, the dosage of each raw material in the formula is optimized, so that the performance stability of the waterproof coiled material coating rubber material is good. SBS: the high and low temperature performance and elasticity of the asphalt are improved; SBR: the bonding performance of the asphalt is improved; rubber powder: the high-temperature performance and elasticity of the asphalt are improved; filling: improve the flow stability and reduce the cost.

In the invention, preferably, the mesh number of the rubber powder is 100-200 meshes, the filler comprises barium sulfate, calcium carbonate, titanium dioxide and kaolin, and the mesh number of the filler is more than 300 meshes. The rubber powder improves the rheological property and high-temperature performance of the rubber material, and the filler plays a role in framework and filling in the rubber material, so that the mechanical strength of the rubber material is improved, such as the wear resistance and the durability are improved.

The invention also provides the nitrile rubber modified asphalt, the waterproof coiled material coating layer and the waterproof coiled material prepared by the preparation method of the nitrile rubber modified asphalt waterproof coiled material coating layer rubber material.

Compared with the prior art, the invention has the beneficial effects that:

1. the nitrile rubber modified asphalt prepared by the invention can ensure that nitrile rubber is uniformly and stably dispersed in asphalt, and the segregation softening point difference is less than 3 ℃ within 48 hours by detecting the segregation degree of the modified asphalt. Compared with the conventional modified asphalt waterproof coiled material on the market, the nitrile rubber modified asphalt waterproof coiled material prepared by using the nitrile rubber modified asphalt has the advantages that the peel strength of the coiled material and the coiled material is improved by more than 0.8N/mm, the peel strength of the coiled material and an aluminum plate is improved by more than 0.6N/mm, and the peel strength of the coiled material and cement mortar is improved by more than 0.3N/mm.

2. The invention adopts maleic anhydride to modify asphalt, the maleic anhydride is a good grafting monomer and reacts with the asphalt to be grafted on the asphalt, and the compatibility of the asphalt and the nitrile rubber is obviously improved. Meanwhile, liquid isoprene rubber is used as a solvent, so that the compatibility of the asphalt and the nitrile rubber is improved.

3. The invention adopts a vulcanization system mainly comprising sulfur powder, tetrabenzylthiuram disulfide and zinc oxide to vulcanize the nitrile rubber, the vulcanized nitrile rubber can improve the peeling strength of asphalt and the storage stability, and the addition of the anti-aging agent and the nano-silica improves the aging resistance of the asphalt rubber material.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments, but the scope of the present invention is not limited to the embodiments.

In the following embodiments, the raw materials are commercially available unless otherwise specified. Wherein the mesh number of the adopted rubber powder is 100-200 meshes, and the mesh number of the filler is more than 300 meshes.

Example 1:

the preparation method of the nitrile rubber modified asphalt waterproof coiled material coating rubber material comprises the following steps.

The method comprises the following steps: anhydrization of asphalt

1. Heating a certain amount of petroleum asphalt to 115 ℃;

2. adding maleic anhydride with the weight of 1 percent of the weight of the petroleum asphalt, stirring and heating to 150 ℃;

3. stirring is continued for 165min to complete the preparation of the anhydrified asphalt.

Step two: nitrile rubber modified asphalt

1. Heating a certain amount of the paraanhydrized asphalt prepared in the first step to 160 ℃;

2. adding 3% of liquid isoprene rubber and 9% of aromatic oil;

3. adding 5% of powdered nitrile rubber, and stirring for 180 min;

4. shearing for 100 min;

5. adding 0.35% of sulfur powder, 0.2% of tetrabenzylthiuram disulfide, 2% of zinc oxide, 0.5% of anti-aging agent RD and 0.5% of nano silicon dioxide;

6. shearing for 60min to complete the preparation.

Step three: preparation of sizing material for coating layer of waterproof coiled material

1. Heating a certain amount of the nitrile rubber modified asphalt prepared in the second step to 160 ℃;

2. adding 3.5% SBS and 1% SBR, heating to 180 deg.C, and stirring for 60 min;

3. adding 5% rubber powder, and stirring at 180 deg.C for 90 min;

4. shearing for 60 min;

5. 26 percent of filler is added and stirred until the mixture is uniformly dispersed, thus completing the preparation.

The weight percentage of the raw materials added in the second step is the weight percentage of the maleic anhydridized asphalt, and the weight percentage of the raw materials added in the third step is the weight percentage of the nitrile rubber modified asphalt.

Example 2:

the preparation method of the nitrile rubber modified asphalt waterproof coiled material coating rubber material comprises the following steps.

The method comprises the following steps: anhydrization of asphalt

1. Heating a certain amount of petroleum asphalt to 125 ℃;

2. adding maleic anhydride with the weight of 1.5 percent of the weight of the petroleum asphalt, stirring and heating to 150 ℃;

3. stirring is continued for 175min to complete the preparation of the paraanhydrized asphalt.

Step two: nitrile rubber modified asphalt

1. Heating a certain amount of the paraanhydrized asphalt prepared in the first step to 160 ℃;

2. adding 2.5% of liquid isoprene rubber and 8% of aromatic oil;

3. adding 4% of powdered nitrile rubber, and stirring for 160 min;

4. shearing for 80 min;

5. adding 0.5% of sulfur powder, 0.25% of tetrabenzylthiuram disulfide, 1.5% of zinc oxide, 2% of anti-aging agent RD and 3% of nano silicon dioxide;

6. shearing for 80min to complete the preparation.

Step three: preparation of sizing material for coating layer of waterproof coiled material

1. Heating a certain amount of the nitrile rubber modified asphalt prepared in the second step to 180 ℃;

2. adding 3.5% SBS and 1.5% SBR, heating to 180 deg.C, and stirring for 60 min;

3. adding 5% rubber powder, and stirring at 180 deg.C for 90 min;

4. shearing for 60 min;

5. 26 percent of filler is added and stirred until the mixture is uniformly dispersed, thus completing the preparation.

The weight percentage of the raw materials added in the second step is the weight percentage of the maleic anhydridized asphalt, and the weight percentage of the raw materials added in the third step is the weight percentage of the nitrile rubber modified asphalt.

Example 3:

the preparation method of the nitrile rubber modified asphalt waterproof coiled material coating rubber material comprises the following steps.

The method comprises the following steps: anhydrization of asphalt

1. Heating a certain amount of petroleum asphalt to 125 ℃;

2. adding maleic anhydride with the weight of 2 percent of the weight of the petroleum asphalt, stirring and heating to 150 ℃;

3. stirring for 180min to complete the preparation of the paraanhydrized asphalt.

Step two: nitrile rubber modified asphalt

1. Heating a certain amount of the paraanhydrized asphalt prepared in the first step to 155 ℃;

2. adding 4% of liquid isoprene rubber and 10% of aromatic oil;

3. adding 4% of powdered nitrile rubber, and stirring for 180 min;

4. shearing for 100 min;

5. adding 1% of sulfur powder, 0.5% of tetrabenzylthiuram disulfide, 2% of zinc oxide, 2% of anti-aging agent RD and 1% of nano silicon dioxide;

6. shearing for 80min to complete the preparation.

Step three: preparation of sizing material for coating layer of waterproof coiled material

1. Heating a certain amount of the nitrile rubber modified asphalt prepared in the second step to 180 ℃;

2. adding 3.5% SBS and 1.5% SBR, heating to 180 deg.C, and stirring for 60 min;

3. adding 5% rubber powder, and stirring at 180 deg.C for 90 min;

4. shearing for 60 min;

5. 26 percent of filler is added and stirred until the mixture is uniformly dispersed, thus completing the preparation.

The weight percentage of the raw materials added in the second step is the weight percentage of the maleic anhydridized asphalt, and the weight percentage of the raw materials added in the third step is the weight percentage of the nitrile rubber modified asphalt.

Example 4:

the preparation method of the nitrile rubber modified asphalt waterproof coiled material coating rubber material comprises the following steps.

The method comprises the following steps: anhydrization of asphalt

1. Heating a certain amount of petroleum asphalt to 130 ℃;

2. adding maleic anhydride with the weight of 3 percent of the weight of the petroleum asphalt, stirring and heating to 160 ℃;

3. stirring for 190min to complete the preparation of the paraanhydrized asphalt.

Step two: nitrile rubber modified asphalt

1. Heating a certain amount of the paraanhydrized asphalt prepared in the first step to 170 ℃;

2. adding 5% of liquid isoprene rubber and 12% of aromatic oil;

3. adding 3% of powdered nitrile rubber, and stirring for 180 min;

4. shearing for 90 min;

5. adding 1.5% of sulfur powder, 0.8% of tetrabenzylthiuram disulfide, 2.5% of zinc oxide, 1% of anti-aging agent RD and 2% of nano silicon dioxide;

6. shearing for 100min to complete the preparation.

Step three: preparation of sizing material for coating layer of waterproof coiled material

1. Heating a certain amount of the nitrile rubber modified asphalt prepared in the second step to 170 ℃;

2. adding 5% SBS and 2% SBR, heating to 180 deg.C, and stirring for 60 min;

3. adding 6% rubber powder, and stirring at 180 deg.C for 90 min;

4. shearing for 60 min;

5. adding 30% of filler and stirring until the mixture is uniformly dispersed to finish the preparation.

The weight percentage of the raw materials added in the second step is the weight percentage of the maleic anhydridized asphalt, and the weight percentage of the raw materials added in the third step is the weight percentage of the nitrile rubber modified asphalt.

Example 5:

the preparation method of the nitrile rubber modified asphalt waterproof coiled material coating rubber material comprises the following steps.

The method comprises the following steps: anhydrization of asphalt

1. Heating a certain amount of petroleum asphalt to 120 ℃;

2. adding maleic anhydride with the weight of 4 percent of the weight of the petroleum asphalt, stirring and heating to 160 ℃;

3. and continuously stirring for 200min to finish the preparation of the paraanhydrized asphalt.

Step two: nitrile rubber modified asphalt

1. Heating a certain amount of the paraanhydrized asphalt prepared in the first step to 165 ℃;

2. adding 3% of liquid isoprene rubber and 11% of aromatic oil;

3. adding 5% of powdered nitrile rubber, and stirring for 150 min;

4. shearing for 90 min;

5. adding 2% of sulfur powder, 1% of tetrabenzylthiuram disulfide, 1.5% of zinc oxide, 1.5% of antioxidant RD and 1.5% of nano silicon dioxide;

6. shearing for 100min to complete the preparation.

Step three: preparation of sizing material for coating layer of waterproof coiled material

1. Heating a certain amount of the nitrile rubber modified asphalt prepared in the second step to 170 ℃;

2. adding 4% SBS and 4% SBR, heating to 180 deg.C, and stirring for 60 min;

3. adding 5% rubber powder, and stirring at 180 deg.C for 90 min;

4. shearing for 100 min;

5. adding 30% of filler and stirring until the mixture is uniformly dispersed to finish the preparation.

The weight percentage of the raw materials added in the second step is the weight percentage of the maleic anhydridized asphalt, and the weight percentage of the raw materials added in the third step is the weight percentage of the nitrile rubber modified asphalt.

Comparative example 1:

the preparation of the coating rubber material of the modified asphalt waterproof coiled material does not adopt nitrile rubber modified asphalt and comprises the following specific steps.

1. Heating a certain amount of petroleum asphalt to 170 ℃;

2. adding 10% aromatic oil, and stirring for 30 min;

3. adding 3.5% SBS and 1.5% SBR, heating to 180 deg.C, and stirring for 60 min;

4. adding 5% rubber powder, and stirring at 180 deg.C for 90 min;

5. shearing for 60 min;

6. 26 percent of filler is added and stirred until the mixture is uniformly dispersed, thus completing the preparation.

Comparative example 2:

the preparation of the coating rubber material of the modified asphalt waterproof coiled material does not comprise the step of asphalt paraanhydrization, and comprises the following specific steps.

The method comprises the following steps: nitrile rubber modified asphalt

1. Heating a certain amount of petroleum asphalt to 160 ℃;

2. adding 3% of liquid isoprene rubber and 9% of aromatic oil;

3. adding 5% of powdered nitrile rubber, and stirring for 180 min;

4. shearing for 100 min;

5. adding 0.35% of sulfur powder, 0.2% of tetrabenzylthiuram disulfide, 2% of zinc oxide, 0.5% of anti-aging agent RD and 0.5% of nano silicon dioxide;

6. shearing for 60min to complete the preparation.

Step two: preparation of sizing material for coating layer of waterproof coiled material

1. Heating a certain amount of the nitrile rubber modified asphalt prepared in the first step to 160 ℃;

2. adding 3.5% SBS and 1% SBR, heating to 180 deg.C, and stirring for 60 min;

3. adding 5% rubber powder, and stirring at 180 deg.C for 90 min;

4. shearing for 60 min;

5. 26 percent of filler is added and stirred until the mixture is uniformly dispersed, thus completing the preparation.

The weight percentage of the raw materials added in the step one is the weight percentage of the petroleum asphalt, and the weight percentage of the raw materials added in the step two is the weight percentage of the nitrile rubber modified asphalt.

Comparative example 3:

the preparation method of the coating rubber material of the nitrile rubber modified asphalt waterproof coiled material adopts the powdered nitrile rubber without adding liquid isoprene rubber, and comprises the following specific steps.

The method comprises the following steps: anhydrization of asphalt

1. Heating a certain amount of petroleum asphalt to 115 ℃;

2. adding maleic anhydride with the weight of 1 percent of the weight of the petroleum asphalt, stirring and heating to 150 ℃;

3. stirring is continued for 165min to complete the preparation of the anhydrified asphalt.

Step two: nitrile rubber modified asphalt

1. Heating a certain amount of the paraanhydrized asphalt prepared in the first step to 160 ℃;

2. adding 12% aromatic oil;

3. adding 5% of powdered nitrile rubber, and stirring for 180 min;

4. shearing for 100 min;

5. adding 0.35% of sulfur powder, 0.2% of tetrabenzylthiuram disulfide, 2% of zinc oxide, 0.5% of anti-aging agent RD and 0.5% of nano silicon dioxide;

6. shearing for 120min to complete the preparation.

Step three: preparation of sizing material for coating layer of waterproof coiled material

1. Heating a certain amount of the nitrile rubber modified asphalt prepared in the second step to 160 ℃;

2. adding 3.5% SBS and 1% SBR, heating to 180 deg.C, and stirring for 60 min;

3. adding 5% rubber powder, and stirring at 180 deg.C for 90 min;

4. shearing for 60 min;

5. 26 percent of filler is added and stirred until the mixture is uniformly dispersed, thus completing the preparation.

The weight percentage of the raw materials added in the second step is the weight percentage of the maleic anhydridized asphalt, and the weight percentage of the raw materials added in the third step is the weight percentage of the nitrile rubber modified asphalt.

And (3) performance testing:

the performance tests of the coating rubber materials of the modified asphalt waterproof coiled materials prepared in the embodiment examples 1-5 and the comparative example 1-3 are carried out, the test items comprise 48h segregation softening point difference and peel strength, and the specific test method is as follows. The test results are shown in table 1.

48h segregation softening point difference test method: the test was carried out according to standard SH/T0740-2003, the specific method being as follows:

1. an empty aluminum tube closed at the lower end is placed on the bracket.

2. The anhydrous sample is heated to a fluid state at a temperature not higher than 110 ℃ above the softening point of the sample, and the heating chamber is not overheated locally. The sample with the coarse particles therein was filtered through a metal screen with a 0.3mm mesh, but the filtrate on the screen was kept free of modifier. 50 g. + -.5 g of the sample was poured into a vertically placed aluminum tube, cooled to room temperature, and the upper port of the aluminum tube was sealed with aluminum foil.

3. The aluminum tube with the sample and the bracket are put into an oven at 163 +/-5 ℃ and vertically kept for 48 hours.

4. And (4) moving the support and the aluminum pipe which are kept in the vertical state out of the oven, and then placing the support and the aluminum pipe into a refrigerator with the temperature below-2 ℃ for standing for 4 hours until the sample is completely cured.

5. And taking out the bracket and the aluminum pipe in the refrigerator. The aluminum tube was placed on a firm plate, and the aluminum tube containing the sample was equally divided into three sections from below the liquid surface of the sample by a knife. And respectively placing the upper section and the lower section into beakers, standing the beakers in an oven at 163 +/-5 ℃ and heating until the samples can flow sufficiently.

6. The aluminum tube in the beaker was taken out, the sample was sufficiently stirred, and the upper stage and the lower stage were placed in the same softening point measuring instrument to simultaneously perform softening point measurement.

And (4) calculating a result: softening point difference of upper softening point and lower softening point

The peel strength was measured according to GB/T35467-.

TABLE 1

Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.