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Ultra-large particle diameter high-fluidity acrylic ester impact-resisting modifier for PVC

A flow-type acrylic and impact modifier technology, which is applied in the field of ultra-large particle size and high-flow type acrylic impact modifiers, can solve the problems of low impact strength, narrow processing range, and high production cost, so as to improve the impact resistance Impact strength, solve the effect of easily blocked pipelines, and increase the content of the core

Active Publication Date: 2008-06-04
临沂瑞丰高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of my country's industry, the PVC industry is booming, but the impact resistance of PVC itself is poor, and impact modifiers need to be added
Impact modifiers mainly include ACR, CPE and other varieties. CPE impact modifiers have the defects of low impact strength and narrow processing range. ACR impact modifiers have excellent impact properties and wide processing range. The unit research and development capability of ACR impact modifier is insufficient, resulting in its impact strength not much different from that of CPE impact modifier. Due to its high production cost, its popularization and application are restricted.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] According to the above preparation process, the crosslinking agent is ethylene glycol dimethacrylate, and the dosage is 2% of the weight of butyl acrylate. The weakly acidic diameter expander adopts acetic acid solution with a mass concentration of 10%, and the dosage is 1% of the amount of butyl acrylate. The amount of the emulsifier is 1% of the total polymerized monomer (including the polymerized monomer of the core layer and the shell layer), and the amount of potassium persulfate or ammonium persulfate is 0.02% of the total polymerized monomer. The first shell layer is 90% of methyl methacrylate and 10% of styrene based on 100% by weight of polymerized monomers of methyl methacrylate and styrene. Based on the total amount of polymerized monomers in the core layer and the shell layer as 100%, the polymerized monomers in the core layer account for 90% of the total polymerized monomer amount, the first shell layer polymerized monomer accounts for 3% of the total polym...

Embodiment 2

[0021] According to the above preparation process, allyl methacrylate is used as the crosslinking agent, and the dosage is 1% of the weight of butyl acrylate. The weakly acidic diameter expander adopts 10% acetic acid solution with a mass concentration of 2% of the butyl acrylate. The amount of the emulsifier is 2% of the total polymerized monomer (including the polymerized monomer of the core layer and the shell layer), and the amount of potassium persulfate or ammonium persulfate is 0.05% of the total polymerized monomer. The first shell layer is 80% of methyl methacrylate and 20% of styrene based on 100% by weight of polymerized monomers of methyl methacrylate and styrene. Based on the total amount of polymerized monomers in the core layer and the shell layer as 100%, the polymerized monomers in the core layer account for 95% of the total polymerized monomer amount, the first shell layer polymerized monomer accounts for 2% of the total polymerized monomer amount, and the se...

Embodiment 3

[0024] According to the above preparation process, allyl methacrylate is used as the crosslinking agent, and the dosage is 1% of the weight of butyl acrylate. The weakly acidic diameter expander adopts 10% acetic acid solution with a mass concentration of 2% of the butyl acrylate. The amount of the emulsifier is 2% of the total polymerized monomer (including the polymerized monomer of the core layer and the shell layer), and the amount of potassium persulfate or ammonium persulfate is 0.03% of the total polymerized monomer. The first shell layer is 85% methyl methacrylate and 15% styrene based on 100% by weight of polymerized monomers methyl methacrylate and styrene. Taking the total amount of polymerized monomers in the core layer and the shell layer as 100%, the polymerized monomers in the core layer account for 93% of the total polymerized monomers, the first shell polymerized monomers account for 2% of the total polymerized monomers, and the second shell polymerized monome...

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PUM

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Abstract

The invention relates to super-size and high-flowing type acrylic resin impact modifier used in PVC, which is core-shell structure copolymer. The core layer is obtained through emulsion polymerization among butyl acrylate, crosslinking agent and weak acidic expansion agent; firstly, emulsion polymerization grafting reaction between styrene and methyl methacrylate is carried out continuously on the core layer, then the methyl methacrylate is independently coated into a second shell layer and acrylic impact modifier release agent is added into the emulsion after polymerization is completed and the additive weight portions of the release agent accounts for 2-5 percent of the total amount of the modifier, thus obtaining the shell layer. The particle size of the copolymer grafted of the invention is larger than 450nm; meanwhile the invention also solves the compatibility problem between super-size high glue content impact ACR and PVC to cause the impact ACR to be fast and evenly dispersed in PVC particles, thus the invention can effectively increase the toughness of PVC products and can be widely used in PVC non-transparent products.

Description

technical field [0001] The invention belongs to an impact modifier for polyvinyl chloride (PVC), in particular to an acrylic ester type impact modifier with super large particle size and high flow. Background technique [0002] With the development of my country's industry, the PVC industry is booming, but the impact resistance of PVC itself is poor, and impact modifiers need to be added. Impact modifiers mainly include ACR, CPE and other varieties. CPE impact modifiers have the defects of low impact strength and narrow processing range. ACR impact modifiers have excellent impact properties and wide processing range. The unit research and development capabilities of ACR impact modifiers are insufficient, and as a result, their impact strength is not much different from that of CPE impact modifiers. Due to their high production costs, their popularization and application are restricted. Contents of the invention [0003] The technical problem to be solved by the present in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L33/12C08F220/10C08F2/22C08F2/44
Inventor 赵圣宝赵立峰徐占伟周学伟
Owner 临沂瑞丰高分子材料有限公司
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