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Low-temperature-resisting high-impact-resistance PVC modifying agent and preparation method thereof

A technology of high impact resistance and modifier, applied in the field of polymer material synthesis, can solve the problems of not obvious advantages in impact strength, hindering the promotion of impact ACR, not environmentally friendly low temperature impact strength, etc., to improve melt fluidity , excellent chemical stability, and low processing cost

Active Publication Date: 2016-01-20
淄博华星助剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the impact modifiers used in my country's PVC products are still dominated by CPE, which is not environmentally friendly and has poor low-temperature impact strength. This is mainly due to the low price of CPE, while the price of impact-resistant ACR is relatively high. It is not obvious and the cost performance is not high, which hinders the promotion of impact-resistant ACR

Method used

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  • Low-temperature-resisting high-impact-resistance PVC modifying agent and preparation method thereof
  • Low-temperature-resisting high-impact-resistance PVC modifying agent and preparation method thereof
  • Low-temperature-resisting high-impact-resistance PVC modifying agent and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0050] A preparation method of a low-temperature-resistant high-impact PVC modifier, comprising the following steps:

[0051] (1) Seed latex preparation: in the reaction kettle equipped with agitator, add each material according to the following proportions:

[0052]

[0053] Start stirring and heat up to 68° C., and react at this temperature for 4 hours to obtain seed latex with an average particle diameter of 80-95 nm.

[0054] (2) Grafting of the core layer: the following components are added to a reactor with a stirrer:

[0055]

[0056]

[0057] Start the stirring and raise the temperature to 68° C., and react at this temperature for 4 to 5 hours to obtain the core layer graft emulsion.

[0058] (3) Shell layer grafting: Add 10 parts of methyl methacrylate and 0.03 parts of potassium persulfate to the reacted core layer graft emulsion, react at 68°C for 2 to 3 hours, and heat up to 85°C Aging for 1-1.5 hours, cooling down to 60°C to obtain PVC impact modifier emu...

Embodiment 4

[0068] In embodiment 1, diallyl phthalate is changed from 1.5 parts to 0.6 part, and diameter expander is changed from 0.4 part to 0.6 part, and all the other are the same as embodiment 1.

Embodiment 5

[0070] In embodiment 1, the amount of seeds is changed from 10 parts to 20 parts, butyl acrylate is changed from 40 parts to 30 parts, sodium lauryl sulfate is changed from 1.2 parts to 0.5 parts, and potassium persulfate is changed from 0.3 parts to 0.5 parts , all the other are identical with embodiment 1.

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Abstract

The invention belongs to the field of high molecular material synthesis and particularly relates to a low-temperature-resisting high-impact-resistance PVC modifying agent. The low-temperature-resisting high-impact-resistance PVC modifying agent is of a core-shell structure, the internal of the structure is an acrylate rubber core, and the external of the structure is a methyl methacrylate shell. The modifying agent can improve the toughness of PVC products, still keep the good impact resistance strength even in a low-temperature environment, improves the fluidity, thermal deformation and weatherability of PVC melts and the surface gloss of the products. The invention further provides a preparation method of the modifying agent. The preparation method comprises the steps that deionized water, an expanding agent, an emulsifier, a soft acrylic ester monomer, a crosslinking agent and an initiator are added into a reactor, and acrylate seed latex is obtained through rection; a part of the acrylate seed latex is taken, the soft acrylic ester monomer is added, a core-layer latex is obtained through reaction, a hard acrylic ester monomer is added into the core-layer latex, high-impact-resistance modifying agent latex is obtained after reaction, and the low-temperature-resisting high-impact-resistance modifying agent is obtained after the latex coagulates and is dehydrated and dried. The raw materials of the modifying agent are easy to obtain, a process is simple and easy to operate, and the modifying agent is pollution-free to the environment and is convenient to use.

Description

technical field [0001] The invention belongs to the field of polymer material synthesis, and in particular relates to a low-temperature-resistant high-impact PVC modifier and a preparation method thereof. Background technique [0002] Impact ACR, also known as AIM, is an acrylic polymer elastomer with a typical core-shell structure. It can improve the impact strength of PVC and also has the performance of processing aids, so it is widely used in various molding processes such as extrusion and injection molding of PVC. [0003] At present, most of the impact modifiers used in my country's PVC products are still dominated by CPE, which is not environmentally friendly and has poor low-temperature impact strength. This is mainly due to the low price of CPE, while the price of impact-resistant ACR is relatively high. It is not obvious and the cost performance is not high, which hinders the promotion of impact-resistant ACR. Improving the impact strength of impact-resistant ACR p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F285/00C08F220/14C08F2/26C08L27/06C08L51/00
Inventor 孔凡高王敬刚王美红徐建光王玉萍孙军伟
Owner 淄博华星助剂有限公司
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