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PVC (polyvinyl chloride) impact modifier opaque high-impact-resistance MBS and preparation method thereof

An impact modifier and high-impact technology, which is applied in the production and preparation of PVC additives, can solve problems such as difficulty in spraying, low impact strength, and difficulty in coagulation in post-treatment processes, so as to improve grafting effect and enhance practicality. Performance, the effect of solving difficult agglomeration or spraying difficulties

Inactive Publication Date: 2019-06-25
SHANDONG DONGLIN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] According to the technical defects existing in the prior art, the technical problem to be solved by the present invention is: provide a PVC impact modifier opaque high-impact MBS and its preparation method to solve the problem of low impact strength existing in existing MBS products , and the problem of difficulty in coagulation or spraying in the post-treatment process

Method used

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  • PVC (polyvinyl chloride) impact modifier opaque high-impact-resistance MBS and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Add formula water, emulsifier, protective colloid (0.01% by weight of monomer) alkali, inorganic salt, molecular weight regulator, crosslinking agent, initiator in the reaction kettle, then close the reaction kettle cover, put Butadiene is injected into the reactor;

[0030] (2) The temperature of the reaction kettle is raised to 65°C, and the reaction is about 20 hours. When the pressure in the reaction kettle drops to 0.5MPa, the temperature is raised to 75°C, and the reaction is continued for about 4 hours to 0.1-0.2MPa. After confirming that the reaction is complete, the temperature is lowered to At 65°C, the reactor returned to normal pressure, and the inner layer accounted for 80%;

[0031] (3) Continue to add emulsifier, protective colloid (0.01% by weight of monomer), the mixture of outer layer monomer styrene (4.0%), acrylate (2.0%) and methyl methacrylate ( 14%), continue to react for 1-3 hours until the reaction is completed, and the outer layer accounts...

Embodiment 2

[0034] The pure butadiene in step (1) in Example 1 is changed to 97 / 3 of butadiene / styrene, and the remaining conditions are the same as in Example 1.

Embodiment 3

[0036] The pure butadiene in step (1) in Example 1 is changed to butadiene / styrene as 95 / 5, and the remaining conditions are the same as in Example 1.

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Abstract

The invention discloses PVC (polyvinyl chloride) impact modifier opaque high-impact-resistance MBS and a preparation method thereof, and relates to the technical field of PVC auxiliary production andpreparation, the PVC (polyvinyl chloride) impact modifier opaque high-impact-resistance MBS is prepared from the following components in parts by mass: 80-95% of a core layer structure, 4-20% of a shell layer structure and 0.001-0.05% of a protective colloid; the core layer structure is a lightly cross-linked butadiene and styrene polymer, the butadiene content is 95-100%, the styrene content is 0-5%, the shell layer structure is one or a copolymer of two or three of styrene, acrylate and methyl methacrylate, the styrene content is 0-5%, the acrylate content is 0-2%, and the methyl methacrylate content is 13-20%; the protective colloid includes one or a compound of two or three of polyvinyl alcohol, gelatin and hydroxypropyl methylcellulose. According to the invention, the problems that anexisting MBS product is low in impact strength and difficult in agglomeration or difficult to spray in a post-treatment process are solved.

Description

technical field [0001] The invention relates to the technical field of production and preparation of PVC auxiliary agents, in particular to a PVC impact modifier opaque high-impact MBS and a preparation method thereof. Background technique [0002] The current methyl methacrylate-butadiene-styrene polymer (MBS) products on the market have always had the disadvantage of low impact strength. To obtain products with higher impact strength, the main measures include: The following aspects: 1. Increase the butadiene content of the core layer; 2. Increase the proportion of the core layer in the core-shell ratio; 3. Design a suitable latex particle size; 4. Increase the grafting rate of the shell layer. The realization of the ideal high impact strength requires the perfect combination of the four, and none of the previous patents mentioned this point. A large part of the impact strength depends on the effect of butadiene content, the higher the butadiene content, the impact streng...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F279/02C08F220/14C08L27/06C08L91/06C08L51/04C08L29/04C08L89/00C08L1/28C08K13/02C08K3/26C08K5/098C08K5/57C08K3/22
CPCC08L27/06C08L51/04C08L1/28C08L89/00C08F279/06C08F2/24C08F2/38C08L9/06C08F220/14C08F212/08C08F236/06C08F236/10C08F220/18C08F2/44C08L2207/53C08F2/01C08K2003/262C08K2003/324
Inventor 张效全衣同刚夏永全赵洪刚刘文邹伯晓许铎马晓敏
Owner SHANDONG DONGLIN NEW MATERIALS CO LTD
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