阅读说明：本技术 一种耐腐蚀环保pvc改性材料 (Corrosion-resistant environment-friendly PVC modified material ) 是由 王旭华 于 2020-05-31 设计创作，主要内容包括：本发明公开了一种耐腐蚀环保PVC改性材料,包括如下重量份的原料：PVC树脂50-70份,丁腈橡胶20-40份,填充剂10-15份,热稳定剂2-6份、增塑剂1-20份、弹性改性剂20-40份、抗氧剂2-4份、润滑剂3-5份,所述PVC树脂为聚合度在1000-1200和密度在1.35-1.45g/cm3的乙烯法PVC树脂,所述填充剂为碳酸钙、陶土、滑石粉、硅藻土以及二氧化硅中的一种,所述热稳定剂是由主体稳定剂、辅助稳定剂和助剂以重量比20-40:4-8:1组成的混合物,所述增塑剂是由非移增塑剂PN-1030和环氧大豆油以重量比13-16:1组成的混合物,所述弹性改性剂为玻璃化温度在80-90℃、密度在1.04-1.06g/cm3的发泡聚苯乙烯。本发明具有可防止光、热分解、且弹性好、抗拉伸能力强,塑性,耐低温性能好,且各成分取材方便,材料环保和抗氧化腐蚀性能强的特点。(The invention discloses a corrosion-resistant environment-friendly PVC modified material which comprises the following raw materials in parts by weight: 50-70 parts of PVC resin, 20-40 parts of nitrile rubber, 10-15 parts of filler, 2-6 parts of heat stabilizer, 1-20 parts of plasticizer, 20-40 parts of elastic modifier, 2-4 parts of antioxidant and 3-5 parts of lubricant, wherein the PVC resin is ethylene-process PVC resin with the polymerization degree of 1000-1200 and the density of 1.35-1.45g/cm3, the filler is one of calcium carbonate, argil, talcum powder, diatomite and silicon dioxide, the heat stabilizer is a mixture consisting of a main stabilizer, an auxiliary stabilizer and an auxiliary agent in a weight ratio of 20-40:4-8:1, the plasticizer is a mixture consisting of a non-grafted plasticizer PN-1030 and epoxy soybean oil in a weight ratio of 13-16:1, and the elastic modifier is a mixture consisting of a plasticizer with the glass transition temperature of 80-90℃, Expanded polystyrene having a density of from 1.04 to 1.06g/cm 3. The invention has the characteristics of capability of preventing light and thermal decomposition, good elasticity, strong tensile resistance, good plasticity and low temperature resistance, convenient material acquisition of each component, environment-friendly material and strong oxidation and corrosion resistance.)

1. An anti-corrosion environment-friendly PVC modified material is characterized in that: the anticorrosive PVC modified material comprises the following raw materials in parts by weight: 50-70 parts of PVC resin, 20-40 parts of nitrile rubber, 10-15 parts of filler, 2-6 parts of heat stabilizer, 1-20 parts of plasticizer, 20-40 parts of elastic modifier, 2-4 parts of antioxidant and 3-5 parts of lubricant.

2. The corrosion-resistant environment-friendly PVC modified material according to claim 1, characterized in that: the PVC resin is ethylene-process PVC resin with the polymerization degree of 1000-1200 and the density of 1.35-1.45g/cm 3.

3. The corrosion-resistant environment-friendly PVC modified material according to claim 1, characterized in that: the filler is one of calcium carbonate, argil, talcum powder, diatomite and silicon dioxide.

4. The corrosion-resistant environment-friendly PVC modified material according to claim 1, characterized in that: the heat stabilizer is a mixture consisting of a main stabilizer, an auxiliary stabilizer and an auxiliary agent in a weight ratio of 20-40:4-8:1, wherein the main stabilizer is one of magnesium stearate, aluminum stearate, potassium stearate, zinc stearate and calcium stearate, and the auxiliary stabilizer is butyltin mercaptide or dibasic lead stearate.

5. The corrosion-resistant environment-friendly PVC modified material according to claim 1, characterized in that: the plasticizer is a mixture of non-migratory plasticizer PN-1030 and epoxidized soybean oil in a weight ratio of 13-16: 1.

6. The corrosion-resistant environment-friendly PVC modified material according to claim 1, characterized in that: the elastic modifier is expanded polystyrene with the glass transition temperature of 80-90 ℃ and the density of 1.04-1.06g/cm 3.

7. The corrosion-resistant environment-friendly PVC modified material according to claim 1, characterized in that: the antioxidant comprises a mixture of a main antioxidant and a secondary antioxidant, wherein the main antioxidant is one of diphenylamine, dihydroquinoline, 2, 6-tertiary butyl-4-methylphenol and bis (3, 5-tertiary butyl-4-hydroxyphenyl) thioether; the secondary antioxidant is dipropionic acid diester thiodipropionate or tridecyl ester.

8. The corrosion-resistant environment-friendly PVC modified material according to claim 1, characterized in that: the lubricant is one of stearic acid, butyl stearate, oleamide and ethylene bis stearamide.

9. The process for preparing an anti-corrosion PVC modified material according to any one of claims 1 to 8, wherein: the method comprises the following steps:

(1) adding nitrile rubber into an internal mixer, setting the temperature of the internal mixer at 165-185 ℃, setting the rotor speed ratio of the internal mixer at 1:1.12-1.16, carrying out internal mixing for 10-16min, adding PVC resin, carrying out internal mixing for 20-30min, adding a filler, and carrying out internal mixing for 4-8min again to obtain a mixed material A;

(2) putting the mixed material A into a high-speed blending machine, adding a heat stabilizer, a plasticizer, an elastic modifier, an antioxidant and a lubricant, and stirring for 15-25min at the temperature of 100-140 ℃;

(3) extruding and granulating the stirred raw materials by a double-screw extruder, controlling the temperature of the double-screw extruder to be 164-: 205-210 ℃, the rotating speed of the screw rod is 180-240r/min, the melt pressure is 14-19Mpa, and the PVC modified material is obtained by melt extrusion, cooling, granulation and drying, so that the corrosion-resistant environment-friendly PVC modified material is prepared.

Technical Field

The invention relates to the technical field of PVC modified materials, in particular to a corrosion-resistant environment-friendly PVC modified material.

Background

The PVC material is polyvinyl chloride, which is one of the plastic products with the largest output in the world, has low price and wide application, and the polyvinyl chloride resin is white or light yellow powder. The molecular weight of the PVC produced industrially is generally within the range of 5-11 ten thousand, and the PVC has larger polydispersity, and the molecular weight is increased along with the reduction of polymerization temperature; without a fixed melting point, softening begins at 80-85 ℃, the temperature of 130 ℃ becomes a viscoelastic state, and the temperature of 160-180 ℃ begins to change into a viscous state; has better mechanical property, impact strength and excellent dielectric property.

The performance indexes of most of the existing PVC materials only meet the basic requirements of national standards, but the existing PVC materials have poor elasticity, are easy to age and are not heat-resistant, and can be decomposed to generate hydrogen chloride at higher temperature, and further can be automatically decomposed by catalysis to cause color change, so that the physical and mechanical properties are also rapidly reduced, the corrosion resistance is poor, and the using effect is poor.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide a corrosion-resistant environment-friendly PVC modified material which has the advantages of good elasticity, environmental protection, excellent temperature resistance and weather resistance, excellent impact resistance, good flame retardant effect, excellent processability and excellent comprehensive performance.

In order to achieve the purpose, the purpose of the invention is realized by the following technical scheme: the corrosion-resistant environment-friendly PVC modified material comprises the following raw materials in parts by weight: 50-70 parts of PVC resin, 20-40 parts of nitrile rubber, 10-15 parts of filler, 2-6 parts of heat stabilizer, 1-20 parts of plasticizer, 20-40 parts of elastic modifier, 2-4 parts of antioxidant and 3-5 parts of lubricant.

Preferably, the PVC resin is ethylene-process PVC resin with the polymerization degree of 1000-1200 and the density of 1.35-1.45g/cm 3.

The invention adopts 1000-1200 and ethylene-process PVC resin with the density of 1.35-1.45g/cm3 as PVC resin, so that the material has high plasticizing speed and is easy to process.

Preferably, the filler is one of calcium carbonate, argil, talcum powder, diatomite and silicon dioxide, and the filler is one of calcium carbonate, argil, talcum powder, diatomite and silicon dioxide, so that the filling effect is good, and the material is cheap and convenient to find.

Preferably, the heat stabilizer is a mixture consisting of a main stabilizer, an auxiliary stabilizer and an auxiliary agent in a weight ratio of 20-40:4-8:1, the main stabilizer is one of magnesium stearate, aluminum stearate, potassium stearate, zinc stearate and calcium stearate, the auxiliary stabilizer is butyltin mercaptide or lead dihydrochloride stearate, and the invention can slow down the reaction, keep chemical balance, reduce surface tension, and prevent light, thermal decomposition or oxidative decomposition by using one of magnesium stearate, aluminum stearate, potassium stearate, zinc stearate and calcium stearate as the main stabilizer and butyltin mercaptide or lead dihydrochloride as the auxiliary stabilizer.

Preferably, the plasticizer is a mixture consisting of a non-migratory plasticizer PN-1030 and epoxidized soybean oil in a weight ratio of 13-16:1, the mixture consisting of the non-migratory plasticizer PN-1030 and the epoxidized soybean oil in a weight ratio of 13-16:1 is used as the plasticizer, the two plasticizers are both environment-friendly plasticizers, the acting force among PVC molecular chains can be reduced, the glass transition temperature and the flow temperature of PVC plastics and the melting point of microcrystals contained in the PVC plastics are all reduced, and the plasticizer can improve the plasticity of resin, so that the product is soft and has good low-temperature resistance; when the two plasticizers are compounded and used in the weight ratio of 8-10:1, the flexibility and the low-temperature resistance of the product can be improved.

Preferably, the elastic modifier is expanded polystyrene with the glass transition temperature of 80-90 ℃ and the density of 1.04-1.06g/cm3, and the invention adopts the expanded polyethylene as the elastic modifier, and the Expanded Polystyrene (EPS) is also called expandable polystyrene and is prepared by suspending and polymerizing styrene and then adding a foaming agent. EPS is a rigid cellular foam of Polystyrene (PS), has good thermal insulation and shock absorption, high compressive strength, and very light weight, and the expanded polystyrene is added to PVC to improve the elasticity of the material. The invention controls the glass transition temperature of the expanded polystyrene at 80-90 ℃ and the density at 1.04-1.06g/cm3, so that the prepared material has good elasticity, high tensile strength and elongation and obviously improved elasticity.

Preferably, the antioxidant comprises a mixture of a main antioxidant and a secondary antioxidant, wherein the main antioxidant is one of diphenylamine, dihydroquinoline, 2, 6-tertiary butyl-4-methylphenol and bis (3, 5-tertiary butyl-4-hydroxyphenyl) sulfide; the secondary antioxidant is diester thiodipropionate or tridecyl ester, one of diphenylamine, dihydroquinoline, 2, 6-tertiary butyl-4-methylphenol and bis (3, 5-tertiary butyl-4-hydroxyphenyl) thioether is used as the primary antioxidant, and one of diester thiodipropionate or tridecyl ester is used as the secondary antioxidant, so that the modified material has good oxygen resistance.

Preferably, the lubricant is one of stearic acid, butyl stearate, oleamide and ethylene bis stearamide, and one of stearic acid, butyl stearate, oleamide and ethylene bis stearamide is adopted as the lubricant, so that the lubricating effect is good, the materials are convenient to obtain, and the material is environment-friendly.

The other purpose of the invention is realized by the following technical scheme: a preparation method of a high-elasticity environment-friendly PVC modified material comprises the following steps:

(1) adding nitrile rubber into an internal mixer, setting the temperature of the internal mixer at 165-185 ℃, setting the rotor speed ratio of the internal mixer at 1:1.12-1.16, carrying out internal mixing for 10-16min, adding PVC resin, carrying out internal mixing for 20-30min, adding a filler, and carrying out internal mixing for 4-8min again to obtain a mixed material A;

(2) putting the mixed material A into a high-speed blending machine, adding a heat stabilizer, a plasticizer, an elastic modifier, an antioxidant and a lubricant, and stirring for 15-25min at the temperature of 100-140 ℃;

(3) extruding and granulating the stirred raw materials by a double-screw extruder, controlling the temperature of the double-screw extruder to be 164-: 205-210 ℃, the rotating speed of the screw rod is 180-240r/min, the melt pressure is 14-19Mpa, and the PVC modified material is obtained by melt extrusion, cooling, granulation and drying, so that the corrosion-resistant environment-friendly PVC modified material is prepared.

Compared with the prior art, the invention has the beneficial effects that: the invention has scientific and reasonable structure and safe and convenient use, adopts one of stearic acid, butyl stearate, oleamide and ethylene bis stearamide as a lubricant, has good lubricating effect, convenient material taking and environment-friendly material, adopts one of calcium carbonate, argil, talcum powder, diatomite and silicon dioxide as a filler, ensures good filling effect and low price and is convenient to find, adopts one of magnesium stearate, aluminum stearate, potassium stearate, zinc stearate and calcium stearate as a main stabilizer, adopts butyl tin mercaptide or lead dihydrochloride stearate as an auxiliary stabilizer, can slow down reaction, keeps chemical balance, reduces surface tension, prevents light, thermal decomposition or oxidative decomposition and the like, controls the vitrification temperature of the expanded polystyrene to be 80-90 ℃ and the density to be 1.04-1.06g/cm3, the prepared material has good elasticity, high tensile strength and elongation and obviously improved elasticity, the mixture of the non-migrating plasticizer PN-1030 and the epoxidized soybean oil in the weight ratio of 13-16:1 is used as the plasticizer, the two plasticizers are both environment-friendly plasticizers, the acting force among PVC molecular chains can be reduced, the glass transition temperature and the flow temperature of PVC plastic and the melting point of microcrystals contained in the PVC plastic are reduced, the plasticizer can improve the plasticity of resin, and the product is soft and has good low-temperature resistance; when two plasticizers are compounded and used according to the weight ratio of 8-10:1, the flexibility and the low-temperature resistance of a product can be improved, one of stearic acid, butyl stearate, oleamide and ethylene bis stearamide is adopted as a lubricant, the lubricating effect is good, the materials are convenient to obtain, the materials are environment-friendly, one of diphenylamine, dihydroquinoline, 2, 6-tertiary butyl-4-methylphenol and bis (3, 5-tertiary butyl-4-hydroxyphenyl) thioether is adopted as a main antioxidant, one of thiodipropionate diester or tridecyl ester is adopted as a secondary antioxidant, the modified material is good in oxygen resistance, PVC is modified through butadiene-acrylonitrile rubber, the dispersion in the modification process is excellent, the modified PVC material has good mechanical strength, excellent aging resistance and high temperature resistance, the material has the characteristics of capability of preventing light and thermal decomposition, good elasticity, strong tensile resistance, plasticity, softness of products, good low-temperature resistance, convenient material taking of various components, environmental protection and strong oxidation and corrosion resistance.

Detailed Description

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.