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Low-cost covering agent used for core-shell structural resin as well as preparation method and application of covering agent

A core-shell structure and coating agent technology is applied in the field of low-cost core-shell structure resin coating agent and its preparation, which can solve the problem of affecting the apparent density, fluidity and anti-agglomeration and agglomeration effect of MBS, and is not conducive to Maintain the light transmittance of MBS modified PVC resin and the uneven mixing of MBS solidified powder, so as to reduce the powder agglomeration and dusting effect, which is beneficial to toughening performance, and improves the fluidity and apparent density.

Active Publication Date: 2018-10-16
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Similar to the aforementioned patents, the polymerized monomers used are also styrene and MMA, and there is a problem of high raw material costs
At the same time, the particle size of the synthesized hard polymer latex is relatively large, which is not conducive to maintaining the light transmission performance of MBS modified PVC resin
In addition, if its addition method is added to the generated MBS resin solidified slurry in a solidified slurry state, it also exists in the uneven mixing of the MBS solidified powder, causing the two components of the coating agent and MBS to condense into granules, which is not conducive to The former's coating on the surface of MBS particles also affects its effect on the apparent density, fluidity and anti-agglomeration of MBS.

Method used

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  • Low-cost covering agent used for core-shell structural resin as well as preparation method and application of covering agent
  • Low-cost covering agent used for core-shell structural resin as well as preparation method and application of covering agent
  • Low-cost covering agent used for core-shell structural resin as well as preparation method and application of covering agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1. Synthesis of MBS emulsion

[0053] (1) Synthesis of small particle size styrene-butadiene latex A

[0054] In an autoclave equipped with a stirrer, add the materials in the following proportions:

[0055]

[0056] Start stirring and replace with nitrogen for two times and then heat up. After reaching the reaction temperature, the temperature is kept constant and stirred for 10 hours to obtain a styrene-butadiene latex (referred to as latex A) with a conversion rate of 96.2% and an average particle size of 45 nm.

[0057] (2) Synthesis of styrene-butadiene latex B with suitable particle size

[0058] In an autoclave equipped with an agitator, add the ingredients according to the following recipe:

[0059]

[0060] Start stirring and replace with nitrogen for two times and then heat up. After reaching the reaction temperature, the temperature is kept constant and stirred for 12 hours to obtain a styrene-butadiene latex (referred to as latex B) with a conversion...

Embodiment 2

[0088] In the synthesis process of the coating agent in the above-mentioned Example 1, the dosage ratio of styrene and acrylonitrile monomer was changed from the original 5:5 to 7:3, and the rest were exactly the same as in Example 1. The performance test results are shown in Table 1.

Embodiment 3

[0090] In the synthesis process of the coating agent in the above-mentioned Example 1, the consumption ratio of styrene and acrylonitrile monomer was changed from the original 5:5 to 3:7, and the rest were exactly the same as in Example 1. The performance test results are shown in Table 1.

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Abstract

The invention belongs to the field of preparation of synthetic resin, and particularly relates to a low-cost covering agent used for core-shell structural resin as well as a preparation method and application of the covering agent. Styrene and acrylonitrile are used as a mixed monomer, a polymerization reaction is performed in the presence of an emulsifier, an initiator, a crosslinking agent and areducing agent, and therefore the covering agent is prepared, wherein a mass of the styrene is 20-80% of a mass of the mixed monomer. The invention also provides the preparation method and application of the covering agent. According to the method and application provided by the invention, under the premise that synthetic costs of the covering agent are significantly reduced, MBS powder dust is reduced; and agglomerated resin particles avoid particle coalescence, reduce an amount of the dust, make fluidity better, improve an apparent density, are more beneficial to mixing of the covering agent and matrix resin, and make the mixing more uniform.

Description

technical field [0001] The invention belongs to the field of preparation of synthetic resins, and in particular relates to a coating agent for low-cost core-shell structure resins and a preparation method and application thereof. Background technique [0002] Core-shell structure polymers generally refer to a class of polymers with different core-core and shell structures, usually soft-core hard-shell multi-copolymers. The shell is usually the resin phase, thereby enhancing its compatibility with the modified resin. The structure determines that its main purpose is the toughening agent of plastic products. Typical representatives of core-shell structure polymers are methyl methacrylate-butadiene-styrene copolymer (MBS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin) and impact-resistant polyacrylate These resins are widely used in the field of modification of PVC and engineering plastics. [0003] The core-shell structure polymer is usually prepared by an emu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F220/44C08F212/36C08F2/26C08F6/14C08F279/02C08F220/14C08F4/40C08L25/12C08L33/20
CPCC08F2/26C08F4/40C08F6/14C08F212/08C08F220/44C08F279/02C08L25/12C08L33/20C08F212/36C08L51/003C08F220/14
Inventor 孟宪谭解洪梅孙建平朱卫东张磊
Owner CHINA PETROLEUM & CHEM CORP
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