Maleic anhydride graft styrene-butadiene-styrene solvent heat-synthesizing method

A technology of maleic anhydride and a synthesis method, applied in the field of polymer science, can solve the problems of complex reaction conditions and devices, low grafting rate, uneven reaction, etc., and achieves easy large-scale production, broad application prospects, and simple reaction equipment. Effect

Inactive Publication Date: 2004-09-15
RES INST OF HIGHWAY MINIST OF TRANSPORT +1
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The solution method has a higher grafting rate (3-8%wt), but the reaction conditions and devices are more complicated, the solvent consumption is large, it is difficult to recycle, and it is not convenient for large-scale production
Wilhelm and Felisberti (Helena Maria Wilhelm, Maria Isabel Felisberti, J.Appl.Polym.Sci., 83, 2002, 2953-2960) studied the reaction of SBS melt-grafted maleic anhydride (MAH) with HAAKE internal mixer, melt grafting The branching reaction is simple, but the reactants are difficult to fully mix, the reaction is not uniform, the grafting rate is also low, less than 3.5%wt, and it is easy to crosslink

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Put 50ml of benzene in the autoclave, add 8g of SBS resin, 1g of maleic anhydride, and 100mg of BPO, tighten the lid of the autoclave and place it in an oven at 130°C for 8 hours, then cool it with water, open the autoclave, and pour the solution into In the ethylene glycol of 250ml, stir (rotating speed 150 revs / min) on magnetic stirrer 1 hour, to remove unreacted substance, then suction filtration, the powder that suction filtration obtains is dried 12 hours in 70 ℃ of vacuum ovens, That is, an SBS-maleic anhydride graft copolymer with a graft ratio of 5.5%wt was obtained.

Embodiment 2

[0015] Put 50ml of acetone in the autoclave, add 10g of SBS resin, 2g of maleic anhydride, 135mg of BPO and 0.8g of acrylamide, tighten the lid of the autoclave and place it in an oven at 110°C for 6 hours, then cool it with water, and open the autoclave , Pour the solution into 300ml of ethylene glycol, stir on a magnetic stirrer (rotating speed 200 rpm) for 1 hour, to remove unreacted substances, then suction filter, the powder obtained by suction filtration is placed in a vacuum oven at 80 ° C Drying in medium temperature for 12 hours obtained the SBS-maleic anhydride graft copolymer with a graft rate of 7.0%wt.

Embodiment 3

[0017] Put 50ml of xylene in the autoclave, add 10g of SBS resin, 1.5g of maleic anhydride, 150mg of BPO and 1.5ml of α-methyl methacrylate, tighten the lid of the autoclave and place it in an oven at 160°C for 7 hours. Then cool with water, open the autoclave, pour the solution into 300ml of acetone, stir (rotating speed 200 rpm) on a magnetic stirrer for 1 hour, to remove unreacted substances, then suction filter, the powder obtained by suction filtration After drying in a vacuum oven at 80°C for 12 hours, an SBS-maleic anhydride graft copolymer with a graft rate of 10.0%wt was obtained.

[0018] The SBS-g-MAH prepared by the method of the present invention is used as a compatibilizer for SBS and nylon (PA) blending, so that the flexibility of the blend is greatly improved; the prepared SBS-g-MAH is used as a blend of SBS and polyester The mixed compatibilizer makes the flexibility of the composite significantly improved.

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Abstract

The invention provides a solvent synthesis method of maleic anhydride graft styrene-butadiene -styrene, placing styrene-butadiene-styrene resin (SBS), maleic anhydride, initiator and comonomer in high pressure kettle to dissolve in solvent, reacting at a certain temperature and in a certain time, and then washing and drying to obtain SBS-maleic anhydride graft copolymer. It is simple, has high grafting rate and convenient for large-scale production. The prepared SBS-g-MAH is used in the compatilizer of the mixture of SBS with polycarbonate, polyester, nylon, polyurethane, polyvinyl chloride and so on.

Description

Technical field: [0001] The invention relates to a solvothermal synthesis method of maleic anhydride grafted styrene-butadiene-styrene, in particular to a method for preparing functionalized styrene-butadiene-styrene by solvothermal synthesis in an autoclave Block copolymer (SBS)-maleic anhydride graft copolymer (SBS-g-MAH) method. This invention is in the field of polymer science. Background technique: [0002] SBS resin is a ternary block copolymer synthesized based on two monomers of butadiene (B) and styrene (S). SBS resin is a kind of rubber elastomer. In addition to being used as rubber, it has been widely used as a toughening modifier for plastics. However, because it is a non-polar material, it has poor compatibility with polar plastics such as nylon and polyester, so it is not ideal as a toughening modifier for polar plastics. In order to improve its compatibility with other plastics, it is often necessary to add a compatibilizer to reduce the particle diameter a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F257/02
Inventor 戚嵘嵘郁秋明周持兴
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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