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EPM-g-MAN toughener and preparation method thereof as well as engineering plastics AEMS

A technology of engineering plastics and toughening agents, applied in the field of engineering plastics AEMS, can solve the problems of low monomer conversion rate, grafting rate and grafting efficiency, difficulty in recycling residual monomers, AES yellowing and brown, etc., and achieves weather resistance. Excellent aging yellowing performance, improved monomer conversion rate and less solvent dosage

Active Publication Date: 2012-05-30
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since both EPDM-g-SAN and SAN resins contain a large amount of acrylonitrile (AN) units, under the high temperature of melt blending, the AN units will form a highly colored conjugated polyimide structure, resulting in AES yellowish brown
[0003] EPDM-g-SAN is generally synthesized by solution graft copolymerization, but the monomer conversion rate, grafting rate and grafting efficiency of the EPDM / St-AN solution grafting system are low, the recovery of residual monomers is difficult, and the product is harmful to SAN. The toughening efficiency is low

Method used

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  • EPM-g-MAN toughener and preparation method thereof as well as engineering plastics AEMS
  • EPM-g-MAN toughener and preparation method thereof as well as engineering plastics AEMS
  • EPM-g-MAN toughener and preparation method thereof as well as engineering plastics AEMS

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The basic formula and implementation formula of embodiment 1 are as shown in table 1. The synthesis operation process of EPM-g-MAN when the mass ratio of AN / MMA is 15 / 85 is as follows:

[0029] Add 60g of EPM and 150g of toluene to a 1000ml three-necked round-bottomed flask equipped with a condensing reflux tube, a stirrer, and an oil bath heating temperature controller, fully dissolve at 60°C for 16 hours, add 34g of methyl methacrylate and 6g of propylene Nitrile mixed monomer. Control the stirring speed to 200 rev / min, add 0.6gBPO and 0.132gSDS after stirring for 30 minutes, stir for 15 minutes to make them evenly mixed. 72g of polyvinyl alcohol-224 (PVA-224) aqueous solution with a concentration of 2% was added dropwise to the reaction system, and the addition was completed within 30 minutes, while adjusting the stirring speed to gradually increase to 1000 rpm. Slowly add 385 g of deionized water into the flask, pass nitrogen gas for 15 minutes, and raise the reac...

Embodiment 2

[0049] Table 2 (b) The relationship between the EPM / MMA-AN mass ratio of Example 2 and the CR, GR, GE and AEMS notched impact strength of the graft system

[0050]

[0051] *EPM content of AEMS: EPM / AEMS percentage is 25wt%.

Embodiment 3

[0054] Table 3 (b) The relationship between the amount of BPO in Example 3 and the CR, GR, GE and AEMS notched impact strength of the graft system

[0055]

[0056] *EPM content of AEMS: EPM / AEMS percentage is 25wt%.

[0057] Table 4 (a) embodiment 4 formula and reaction condition

[0058]

[0059] Table 4 (b) the relationship between the amount of solvent in Example 4 and the CR and AEMS notched impact strength of the graft system

[0060]

[0061] *EPM content of AEMS: EPM / AEMS percentage is 25wt%.

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Abstract

The invention discloses an EPM-g-MAN toughener and a preparation method thereof as well as engineering plastics AEMS. In the preparation method, ethylene propylene rubber and methyl methacrylate as well as acrylonitrile serve as raw material to synthesize graft copolymer EPM-g-MAN by a suspension graft copolymerization method. In the method, EPM is dissolved in organic solvent, and the mixed solution is added with MMA-AN mixed monomer, evocating agent and assistant dispersant to be stirred at low temperature to be evenly mixed; then, the mixture is dripped with dispersant water solution under the high speed agitation and the needed de-ionized water for reaction when the mixed solution is heated up under the nitrogen protection. The product is filtered, washed and dried after the reaction, so that granular toughener EPM-g-MAN with the EPM content of 47.5-68.7% can be obtained. The monomer conversion rate of an EPM / MMA-AN suspension graft copolymerization system is 85-94.82%, and the grafting percent reaches as high as 40%. The synthesized EPM-g-MAN can be mixed with SAN resin to prepare the high-impact engineering plastics AEMS with excellent weather aging yellowing resistant property, and the notch impact strength of the AEMS is 17-59.3kJ / m<2>.

Description

technical field [0001] The invention relates to a preparation technology of graft copolymer EPM-g-MAN toughening agent and engineering plastic AEMS prepared by blending with SAN resin. Background technique [0002] EPDM-g-SAN, a graft copolymer of ethylene-propylene-diene rubber (EPDM), styrene and acrylonitrile (St-AN), has a good toughening effect on SAN resin, and its blend AES products are a kind of resistant High impact plastic with excellent weathering properties. However, since both EPDM-g-SAN and SAN resins contain a large amount of acrylonitrile (AN) units, under the high temperature of melt blending, the AN units will form a high-color conjugated polyimide structure, causing AES to turn yellowish-brown. [0003] EPDM-g-SAN is generally synthesized by solution graft copolymerization, but the monomer conversion rate, grafting rate and grafting efficiency of the EPDM / St-AN solution grafting system are low, the recovery of residual monomers is difficult, and the produ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F255/06C08F2/20C08L25/12C08L51/06
Inventor 王炼石熊凯蔡彤旻张安强曾祥斌
Owner KINGFA SCI & TECH CO LTD
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