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In-situ modified powder rubber and its preparation method

A powder rubber and in-situ modification technology, which is applied in the field of in-situ modified powder rubber and its preparation, can solve the problems affecting the fluidity of powder rubber, agglomeration and uneven dispersion, and fast aging reaction rate, so as to prolong aging and discoloration Problems, improvement of overall performance, effect of improvement in dispersibility

Active Publication Date: 2018-04-13
常州市五洲化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a small amount of antioxidant or anti-aging agent is contained in the raw material emulsion for preparing powder rubber, due to the small particle size and large specific surface area of ​​powder rubber, the aging reaction rate is relatively fast, and aging and discoloration will occur over time during storage. And affect the fluidity of powder rubber
In addition, powder rubber is prone to agglomeration and uneven dispersion in the matrix resin

Method used

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  • In-situ modified powder rubber and its preparation method
  • In-situ modified powder rubber and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 110 parts of water and 6 parts of sodium hydroxide into the reaction kettle. Add 30 parts of lauric acid while stirring. After the lauric acid is completely dissolved, add nitrile latex (33% acrylonitrile, 45% gel content, Wuxi Yatai Synthetic Rubber Co., Ltd.) 165 parts, antioxidant 2246 (2,2'-methylene bis (4-methyl-6-tert-butyl phenol)) 1.5 parts, after mixing uniformly, stir at 100 rpm Add 24 parts of calcium chloride aqueous solution with a concentration of 35% at a high speed. After 20 minutes of adding, continue to stir and react for 30 minutes, and then centrifuge, wash, dry, crush and sieving, and finally get 1# calcium laurate in situ Modified powdered nitrile rubber. The specific formula is shown in Table 1, where the content of each component is calculated in parts by weight.

[0024] Rubber powder performance test: The 1# sample is aged in a 150℃ blast drying oven, and a sample is taken out every 40 minutes, and the yellow index of the sample after aging ...

Embodiment 2

[0027] In addition to adjusting the amount of nitrile latex to 300 parts, the antioxidant is adjusted to 2246 (2,2'-methylene bis (4-methyl-6-tert-butyl phenol)) 1.5 parts and DLTP (thiobis Dilauryl propionate) 0.5 parts, and the rest is the same as in Example 1. After reaction, 2# calcium laurate modified powder nitrile rubber in situ was obtained. The specific formula is shown in Table 1, where the content of each component is calculated in parts by weight

[0028] The performance test of sample 2# is the same as that of Example 1, and the results are shown in Table 1.

[0029] Except that the 2# sample is used in the preparation of PVC mixed powder, the rest is the same as in Example 1. The specific formula is shown in Table 2, and the content of each component is calculated in parts by weight. After sample preparation, mechanical and other performance test results are shown in Table 2.

Embodiment 3

[0031] Except that the nitrile rubber latex is replaced with carboxyl styrene butadiene rubber latex (solid content 40%, Wuxi Yatai Synthetic Rubber Co., Ltd.), the rest is the same as in Example 1, and 3# calcium laurate in-situ modified powder carboxyl styrene butadiene rubber is obtained by reaction . The specific formula is shown in Table 1, where the content of each component is calculated in parts by weight.

[0032] The performance test of sample 3# is the same as that of Example 1, and the results are shown in Table 1.

[0033] Except that the 3# sample is used for the preparation of PVC mixed powder, the rest is the same as in Example 1. The specific formula is shown in Table 2, and the content of each component is calculated in parts by weight. After sample preparation, mechanical and other performance test results are shown in Table 2.

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Abstract

The invention discloses in-situ modification powder rubber and a preparation method thereof.The in-situ modification powder rubber comprises the following components in parts by weight: 100 parts of powder rubber, 10-80 parts of saturated fatty acid metal salt, and 0.1-20 parts of an antioxidant.The gel content of the powder rubber is 20%-70% by weight.The saturated fatty acid metal salt is calcium, zinc, magnesium or barium salts of C12-C18 saturated fatty acid.The antioxidant is one or more of hindered phenols, phosphite esters and sulfur esters antioxidants.The preparation method comprises the following steps: adding water and sodium hydroxide in a reactor; adding the saturated fatty acid while stirring; after the saturated fatty acid is completely dissolved, continuing stirring and adding rubber latex and the antioxidant under stirring; after mixing evenly, adding an aqueous solution of soluble calcium, zinc, magnesium or barium compounds and precipitating out; and then centrifugally separating, washing, drying, pulverizing and screening to obtain the in-situ modification powder rubber.The in-situ modification powder rubber has the beneficial effect that the in-situ modification powder rubber has good ageing resistance and has good dispersibility in resin.

Description

Technical field [0001] The invention relates to the field of polymer materials, and more specifically, to an in-situ modified powder rubber and a preparation method thereof. With this manufacturing method, an in-situ modified powder rubber with long storage time, good storage color retention, and good dispersibility in the matrix resin can be prepared. Background technique [0002] Compared with traditional block rubber, powder rubber has the advantages of convenient operation, easy continuity and automation in processing and application, and can significantly improve the performance of the resin to produce rubber-plastic blended products. Therefore, its production is developing rapidly. The developed products include powdered styrene butadiene rubber, powdered carboxyl styrene butadiene rubber, powdered natural rubber, powdered polybutadiene rubber, powdered acrylate rubber, powdered nitrile rubber, powdered carboxyl nitrile rubber, powdered neoprene, etc. . According to the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/04C08L9/08C08K5/098C08K5/13C08K5/372C08L27/06
CPCC08K5/098C08K5/13C08K5/372C08K2201/014C08L27/06C08L2201/08C08L2205/03C08L9/04C08L9/08C08K13/02C08K5/09
Inventor 张莉娜孙淑英方春平
Owner 常州市五洲化工有限公司
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