Method for preparing EPT rubber graft by emulsion method

A technology of EPDM rubber and graft, which is applied in the field of polymer chemistry, can solve the problems of difficult heat transfer, large consumption of solution polymerization solvent, etc., and achieves stable polymerization reaction process, production cost saving, and high grafting efficiency. Effect

Active Publication Date: 2009-01-21
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method for preparing styrene-EPDM-acrylonitrile grafts by emulsion polymerization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First, add EPDM rubber / n-hexane mucilage 92g (solid content 9.873% (mass fraction)) in the there-necked flask, styrene 30g, acrylonitrile 10g, disproportionated rosin 5.28g; Weigh 2.64g potassium hydroxide, Dilute with 50g of deionized water and add to the constant pressure dropping funnel, assemble the constant pressure dropping funnel, three-neck flask, inert gas protection tube and high-speed stirrer, and connect the inert gas tube to below the oil phase liquid level. Open the inert gas protection tube, fully replace the air in the three-necked bottle, start stirring, the shear rate is 6000r / min, first mix the oil phase evenly, then open the constant pressure dropping funnel, and add dropwise at a speed of 1-8 drops / s Potassium hydroxide aqueous solution was emulsified while being saponified, and a total of 150 g of deionized water was added. During the emulsification process, it can be clearly seen that the continuous phase of the system changes from an oil phase to ...

Embodiment 2

[0028]First, add EPDM rubber / n-hexane mucilage 62g (solid content 14.65% (mass fraction)) in there-necked flask, dissolve disproportionated rosin 5.28g with 30g n-hexane, join in the there-necked flask after dissolving; Dilute 2.64g of potassium hydroxide with 50g of deionized water and add it to the constant pressure dropping funnel. Assemble the constant pressure dropping funnel, three-necked flask, inert gas protection tube and high-speed stirrer, and connect the inert gas tube to the oil phase below the liquid level. Open the inert gas protection tube, fully replace the air in the three-necked bottle, start the stirring, first mix the oil phase evenly, then open the constant pressure dropping funnel, add potassium hydroxide aqueous solution dropwise at a speed of 1-8 drops / s, and saponify while For emulsification, add 150g of deionized water in total. During the emulsification process, it can be clearly seen that the continuous phase of the system changes from an oil phase...

Embodiment 3

[0032] The amount of material added is the same as in Example 2, the shear rate during emulsification is 10000r / min, 30g of styrene and 10g of acrylonitrile mixed monomers are added at once after the temperature of the emulsion system rises to 65°C, and the initiator potassium persulfate is 0.32g ( Dissolve it with 10g of deionized water) After the system temperature rises to 65°C, add it all at once. After 10 hours of reaction, the reaction was stopped, and the monomer conversion rate was measured to be 61.16%. Pour the emulsion in the reactor into a beaker to cool.

[0033] Configure a glacial acetic acid aqueous solution with a pH of 3, add glacial acetic acid to break the emulsion while stirring the emulsion in the beaker, wash and dry to obtain 38.83 g of the product, use acetone as the extraction agent, and use the Soxhlet extraction method to obtain styrene-ternary The graft rate of ethylene propylene rubber-acrylonitrile graft was 192.6%, and the graft efficiency was ...

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Abstract

The invention relates to a method for synthesizing a styrene-ethylene propylene terpolymer-acrylonitrile graft through an emulsion polymerization method. The obtained styrene- ethylene propylene terpolymer-acrylonitrile graft can be used for preparing a styrene- ethylene propylene terpolymer-acrylonitrile graft resin through mixing with SAN. Because of the simple emulsification process and the high grafting efficiency, the method can save production cost and is characterized by continuous production.

Description

technical field [0001] The invention belongs to the field of polymer chemistry, in particular to a method for preparing polymer compounds by emulsion polymerization. Background technique [0002] Styrene-EPDM-acrylonitrile graft resin is a new type of engineering plastic developed for the poor weather resistance of ABS. The ethylene-propylene-diene rubber (referred to as: EPDM) in the styrene-EPDM rubber-acrylonitrile graft resin has less double bond content in the molecular chain, so the styrene-EPDM rubber-acrylonitrile graft resin The weather resistance is 4-8 times higher than ABS. The thermal stability, water absorption and impact strength of styrene-EPDM-acrylonitrile graft resin are better than ABS resin, and other properties are similar to ABS. Styrene-EPDM rubber-acrylonitrile graft resin is not only a resin with excellent weather resistance, but also because of the low glass transition temperature of the EPDM rubber phase, the styrene-EPDM rubber-acrylonitrile gr...

Claims

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Application Information

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IPC IPC(8): C08F255/06C08F2/22
Inventor 王宇郗向丽石艳付志峰蔡小平邹向阳董颖金春玉刘洪伟
Owner PETROCHINA CO LTD
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