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Low temperature resistant high impact PVC modifier and preparation method thereof
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A high-impact and modifier technology, applied in the field of polymer material synthesis, can solve the problems of hindering the promotion of impact-resistant ACR, unenvironmental low-temperature impact strength, and the advantages of impact strength are not obvious, and achieve excellent chemical stability, Good cold resistance and the effect of improving melt fluidity
Active Publication Date: 2018-03-16
淄博华星助剂有限公司
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[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
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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 polymer material synthesis, and in particular relates to a low-temperature-resistant high-impact PVC modifier, which has a core-shell structure, with an acrylate rubber core inside and a methyl methacrylate shell outside. It can improve the toughness of PVC products, maintain good impact strength even in low temperature environment, improve PVC melt fluidity, thermal deformation, weather resistance and surface gloss of products. The present invention also provides its preparation method, adding deionized water, diameter expander, emulsifier, acrylate soft monomer, crosslinking agent, initiator in the reactor, and reacting to obtain acrylate seed latex; take part of acrylate seed latex , add acrylate soft monomer, react to get the core layer latex, add acrylate hard monomer to the core layer latex, and get high impact modifier latex after reaction, coagulate the latex, dehydrate and dry to get low temperature resistant high impact Modifier: the invention has easy-to-obtain raw materials, simple and easy-to-operate process, no pollution to the environment, and convenient use of the product.
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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