阅读说明：本技术 一种改性硅油疏水剂及制法与采用该疏水剂制备的防水砂浆及制法 (Modified silicone oil hydrophobing agent and preparation method thereof, waterproof mortar prepared by using hydrophobing agent and preparation method thereof ) 是由 朱研 吴思玥 唐婷婷 宋兆友 罗乃将 吴其胜 于 2020-05-21 设计创作，主要内容包括：本发明公开了一种改性硅油疏水剂及制法与采用该疏水剂制备的防水砂浆及制法,疏水剂包括聚甲基硅氧烷、1-庚烯、三氯叔丁醇和氯铂酸异丙醇；制法为将聚甲基硅氧烷和1-庚烯混合搅拌,加入氯铂酸异丙醇,反应加入三氯叔丁醇继续搅拌；防水砂浆包括水泥、级配砂、硅灰、粉煤灰、黏土、钛白粉、纤维素醚、可再分散性乳胶粉、聚丙烯纤维、聚羧酸减水剂、消泡剂和疏水剂；制法为将其余原料混匀制得粉料后加入疏水剂和水制得防水砂浆。本发明的疏水剂具有优越的疏水性能,且采用该疏水剂制备的防水砂浆具有优越的抗渗性能。(The invention discloses a modified silicone oil hydrophobic agent and a preparation method thereof, and waterproof mortar prepared by adopting the hydrophobic agent and a preparation method thereof, wherein the hydrophobic agent comprises polymethylsiloxane, 1-heptene, chlorobutanol and chloroplatinic acid isopropanol; the preparation method comprises mixing and stirring polymethylsiloxane and 1-heptene, adding chloroplatinic acid isopropanol, reacting, adding chlorobutanol, and continuing stirring; the waterproof mortar comprises cement, graded sand, silica fume, fly ash, clay, titanium dioxide, cellulose ether, redispersible latex powder, polypropylene fiber, polycarboxylic acid water reducing agent, defoaming agent and hydrophobic agent; the preparation method comprises the steps of mixing the rest raw materials to obtain powder, and adding a hydrophobing agent and water to obtain the waterproof mortar. The hydrophobic agent has excellent hydrophobic property, and the waterproof mortar prepared by the hydrophobic agent has excellent anti-permeability property.)

1. A modified silicone oil hydrophobing agent is characterized in that: the structure of the hydrophobic agent is shown as the following (I):

wherein the value of n is 1000-2000.

2. The hydrophobizing agent according to claim 1, characterized in that: the hydrophobic agent comprises the following raw materials in parts by weight: 63-74 parts of polymethylsiloxane, 20-25 parts of 1-heptene, 5-10 parts of chlorobutanol and 1-2 parts of chloroplatinic acid isopropanol.

3. A process for preparing the hydrophobing agent of claim 2, characterised in that it comprises the steps of: mixing and stirring polymethylsiloxane and 1-heptene, adding chloroplatinic acid isopropanol, reacting, cooling, adding chlorobutanol, and continuously stirring to obtain the hydrophobic agent.

4. The waterproof mortar is characterized by comprising the following raw materials in parts by weight: 20-30 parts of cement, 50-60 parts of graded sand, 3-5 parts of silica fume, 5-10 parts of fly ash, 1-3 parts of clay, 2-4 parts of titanium dioxide, 0.05-0.2 part of cellulose ether, 1-3 parts of redispersible latex powder, 0.02-0.05 part of polypropylene fiber, 0.05-0.3 part of polycarboxylic acid water reducing agent, 0.05-0.2 part of defoaming agent and 0.5-2 parts of modified silicone oil hydrophobing agent of claim 1.

5. The waterproof mortar of claim 4, wherein: the cellulose ether has a viscosity of 10000-25000mPa.s and is hydroxyethyl methyl cellulose ether or hydroxypropyl methyl cellulose ether.

6. The waterproof mortar of claim 4, wherein: the redispersible latex powder is PVA/EVA blending redispersible latex powder.

7. The waterproof mortar of claim 4, wherein: the fineness modulus of the graded sand is 1.7-2.0, and the graded sand is water-washed river sand or quartz sand.

8. A method for preparing the waterproof mortar of claim 4, which comprises the steps of: uniformly mixing and stirring cement and graded sand, adding silica fume, fly ash, clay, titanium dioxide, cellulose ether, redispersible latex powder, polypropylene fiber, polycarboxylic acid water reducing agent and defoaming agent, mixing to prepare polymer cement waterproof mortar powder, then adding modified silicone oil hydrophobing agent and water accounting for 20-25% of the weight of the polymer cement waterproof mortar powder into the powder, and uniformly stirring to prepare the waterproof mortar.

Technical Field

The invention belongs to the field of mortar preparation, and particularly relates to a modified silicone oil hydrophobing agent and a preparation method thereof, and waterproof mortar prepared by using the hydrophobing agent and a preparation method thereof.

Background

The problems of leakage of building structures and prolonging of the service life of buildings are solved, and besides the waterproof and anti-permeability effects achieved through compact structures, the use of waterproof materials becomes an essential waterproof means. Unlike the traditional water-proofing method only using cement-based hydraulic material, the polymer cement waterproof mortar contains inorganic hydraulic cementing material and organic macromolecular resin, wherein the inorganic binder cement can provide water-resistant framework, mechanical binding force with a base surface, long-term durability and strength growth; the polymer can reinforce a cement system, and the polymer is uniformly distributed in a mortar system, so that the generation of cracks is reduced.

However, the existing polymer cement waterproof mortar is limited by low early strength, easy differentiation, poor impermeability and general waterproof effect of the product caused by the addition of the polymer.

Disclosure of Invention

The purpose of the invention is as follows: the first purpose of the invention is to provide a modified silicone oil hydrophobizing agent with strong hydrophobicity; the second object of the present invention is to provide a process for preparing the hydrophobizing agent;

the third object of the present invention is to provide a waterproof mortar prepared by using the above hydrophobizing agent, which has superior impermeability; the fourth purpose of the invention is to provide a method for preparing the waterproof mortar.

The technical scheme is as follows: the modified silicone oil hydrophobing agent is characterized in that: the structure of the hydrophobic agent is shown as the following (I):

wherein the value of n is 1000-2000.

Furthermore, the hydrophobic agent comprises the following raw materials in parts by weight: 63-74 parts of polymethylsiloxane, 20-25 parts of 1-heptene, 5-10 parts of chlorobutanol and 1-2 parts of chloroplatinic acid isopropanol.

The modified silicone oil hydrophobic agent is prepared by adopting polymethyl siloxane as a main raw material and combining 1-heptene, chlorotert-butyl alcohol and chloroplatinic acid isopropanol, the hydrophobic agent is prepared by performing addition reaction on the 1-heptene, the chlorotert-butyl alcohol and SiH groups on silicone oil, the 1-heptene and the chlorotert-butyl alcohol are introduced into a silicone-oxygen chain to prepare modified silicone oil, and the introduced long-chain alkyl and the chlorotert-butyl alcohol have higher hydrophobicity, so that the hydrophobic property of the modified silicone oil hydrophobic agent is improved, and the impermeability of the polymer cement waterproof mortar is improved.

The method for preparing the hydrophobic agent comprises the following steps: mixing and stirring polymethylsiloxane and 1-heptene, adding chloroplatinic acid isopropanol, reacting for 1.5-2h, cooling to 60-70 ℃, adding chlorobutanol, and continuously stirring for 1-1.5h to obtain the hydrophobing agent.

The waterproof mortar prepared by the hydrophobing agent comprises the following raw materials in parts by weight: 20-30 parts of cement, 50-60 parts of graded sand, 3-5 parts of silica fume, 5-10 parts of fly ash, 1-3 parts of clay, 2-4 parts of titanium dioxide, 0.05-0.2 part of cellulose ether, 1-3 parts of redispersible latex powder, 0.02-0.05 part of polypropylene fiber, 0.05-0.3 part of polycarboxylic acid water reducing agent, 0.05-0.2 part of defoaming agent and 0.5-2 parts of modified silicone oil hydrophobing agent of claim 1.

According to the invention, clay and titanium dioxide are added into the waterproof mortar, so that the fluidity of the waterproof mortar is improved, and the operability is improved. Furthermore, the viscosity of the cellulose ether used in the waterproof mortar of the present invention is 10000-25000mPa.s, which is hydroxyethyl methyl cellulose ether or hydroxypropyl methyl cellulose ether. The redispersible latex powder is PVA/EVA blending redispersible latex powder. The fineness modulus of the graded sand is 1.7-2.0, and the graded sand is water-washed river sand or quartz sand.

The method for preparing the waterproof mortar comprises the following steps: uniformly mixing cement and graded sand, adding silica fume, fly ash, clay, titanium dioxide, cellulose ether, redispersible latex powder, polypropylene fiber, polycarboxylic acid water reducing agent and defoaming agent, mixing to obtain polymer cement waterproof mortar powder, adding modified silicone oil hydrophobing agent and water accounting for 20-25% of the weight of the polymer cement waterproof mortar powder into the powder, and uniformly mixing to obtain the waterproof mortar.

Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: the hydrophobic agent has excellent hydrophobic property, and the waterproof mortar prepared by the hydrophobic agent has excellent bonding strength, breaking strength and compressive strength and excellent impermeability; meanwhile, the preparation method of the water repellent agent and the waterproof mortar is simple and convenient, and the operability is strong.

Drawings

FIG. 1 is an infrared spectrum of a hydrophobizing agent of the present invention.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the following examples.

The raw materials adopted by the invention can be purchased from the market. Wherein the adopted cement is No. 42.5 ordinary portland cement. The specific surface area of the silica fume is more than or equal to 20000m²/kg，SiO₂The content is more than or equal to 90 percent. The fly ash meets the requirement of II-grade ash. The clay is illite clay powder. Ti in titanium dioxide₂The content of O is 70-75%. The polypropylene fibers have a length of 3mm or 6 mm. The defoaming agent is a commercially available general-purpose powdery defoaming agent.