High cold-resistance ultra-high impact strength resistance modified for PVC

An impact modifier and impact strength technology, which is applied in the field of impact modifiers for polyvinyl chloride, can solve the problems of high processing costs of PVC products, and achieve the effect of improving impact strength and ultra-high impact strength

Inactive Publication Date: 2008-06-04
SHANDONG RUIFENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are many kinds of PVC modifiers with high impact strength, but modifiers with high impact strength and high cold resistance are currently mainly imported, which makes the processing cost of PVC products very high

Method used

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  • High cold-resistance ultra-high impact strength resistance modified for PVC

Examples

Experimental program
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Effect test

example 1

[0012] Example 1: Add deionized water in a 3000L glass-lined kettle, which is 49% of the total emulsion, 1% (accounting for the total amount of polymerized monomers) of sodium lauryl sulfate, stir, add butyl acrylate, acrylic acid Isooctyl acrylate and crosslinking agent ethylene glycol dimethacrylate, based on the amount of butyl acrylate and isooctyl acrylate as 100%, butyl acrylate is 50%, isooctyl acrylate is 50%, dimethyl Ethylene glycol acrylate is 1% of the total amount of the two polymerized monomers of the core layer, adding potassium persulfate which is 0.01% of the total polymerized monomer amount of the core layer and the shell layer, and the polymerized monomers are evenly divided into 4 sections for emulsion polymerization. After the measured conversion rate is greater than 95%, the next stage of polymerization monomer is added, and the reaction temperature is controlled to 50-80°C. After the exotherm is complete, keep the temperature at 80-85°C for 1 hour. Cont...

example 2

[0013] Example 2: Same as Example 1, except that the amount of polymerized monomers in the shell layer is 8% of the total amount of polymerized monomers, and the amount of polymerized monomers in the core layer accounts for 92% of the total amount of polymerized monomers.

example 3

[0014] Example 3: Same as Example 1, except that the amount of polymerized monomers in the shell layer is 6% of the total amount of polymerized monomers, and the amount of polymerized monomers in the core layer accounts for 94% of the total amount of polymerized monomers.

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Abstract

The invention relates to high cold resistant and super-high-impact strength impact modifier, which is core-shell structural copolymer. Crosslinking agent is added into polymeric monomer butyl acrylate and iso-octyl acrylate to carry out emulsion polymerization, thus obtaining the core layer. The total weight of the core-layer polymeric monomer is calculated in 100 percent, wherein, the butyl acrylate accounts for 20-50 percent and the iso-octyl acrylate accounts for 50-80 percent; the shell layer is obtained through continuous emulsion polymerization of methyl methacrylate on the core layer. The amount of the core-layer polymeric monomer accounts for 90-95 percent of total polymeric monomer and the amount of the shell-layer polymeric monomer accounts for 5-10 percent of the total polymeric monomer. The core-shell copolymer of the invention comprises that the content of core-layer acryl elastomer is more than 90 percent, thus greatly improving the impact strength; the glass transition temperature of the core can be reduced lower than minus 60 DEG C, thus ensuring the high cold resistance of the products. The invention has super-high impact strength in the PVC and can be widely used in PVC exterior boardy products.

Description

technical field [0001] The invention belongs to an impact modifier for polyvinyl chloride (PVC), in particular to an impact modifier with high cold resistance and super high impact strength. Background technique [0002] PVC outdoor hard products should have high impact strength and cold resistance, especially in harsh low temperature environments, the cold resistance requirements are more prominent. There are many kinds of PVC modifiers with high impact strength, but modifiers with high impact strength and high cold resistance are currently mainly imported, which makes the processing cost of PVC products very high. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a high cold resistance and super high impact strength impact modifier for PVC, which can make PVC products have super high impact strength and high cold resistance. [0004] The high cold resistance and super high impact strength impact modifier for PVC...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08F220/16C08F265/06C08F2/26
Inventor 孙锋赵圣宝徐占伟赵立峰
Owner SHANDONG RUIFENG CHEM
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