A kind of method preparing styrene maleic anhydride block copolymer SMA resin
A block copolymer and maleic anhydride technology, which is applied in the field of preparing styrene maleic anhydride block copolymer SMA resin, can solve the problems that have not been seen in patents and literature reports, achieve high added value, solve environmental problems, The effect of chemical structure regularization
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Embodiment 1
[0030] (1) preparation mass fraction is the ZnCl of 80%2 Degradation solution composed of water, according to the mass ratio of unsaturated polyester resin (PMPS): degradation solution is 1:100, immerse the pulverized unsaturated polyester resin (PMPS) (particle size 1-10mm) in the degradation solution , and sealed in the reactor, the degradation reaction temperature is 250°C, and the reaction time is 12h;
[0031] (2) After the degradation reaction is completed, cool to room temperature, and then add the solvent tetrahydrofuran, and the mass ratio of the degradation product mixture to the added tetrahydrofuran is 1:2. Remove solid residue (mainly catalyst) by filtration to obtain a clear solution;
[0032] (3) Add the precipitating agent ethyl acetate to the clear solution, and the mass ratio of the amount of ethyl acetate added to the dissolving agent tetrahydrofuran is 1:1. The styrene maleic anhydride block copolymer SMA resin is precipitated, filtered, washed and dried t...
Embodiment 2
[0034] (1) preparation mass fraction is 10% FeCl 3 The degradation solution composed of ethanol, according to the mass ratio of glass fiber reinforced unsaturated polyester resin composite material: degradation solution is 1:50, immerse the glass fiber reinforced unsaturated polyester resin composite material (with a particle size of 1-10mm) in the degradation solution and sealed in the reactor, the degradation reaction temperature is 160°C, and the reaction time is 50h;
[0035] (2) After the degradation reaction is completed, cool to room temperature, and then add the solvent acetone, and the mass ratio of the degradation product mixture to the added acetone is 1:3. The solid residue (mainly catalyst and fibers) was removed by filtration to obtain a clear solution;
[0036] (3) Add precipitating agent acetonitrile to the clarified solution, the mass ratio of acetonitrile added to dissolving agent acetone is 1:1. The styrene maleic anhydride block copolymer SMA resin is pre...
Embodiment 3
[0038] (1) the preparation mass fraction is 20% AlCl 3 Degradation solution composed of water, according to the mass ratio of unsaturated polyester resin (PMPS): degradation solution is 1:75, immerse the pulverized unsaturated polyester resin (PMPS) (particle size 1-10mm) in the degradation solution , and sealed in the reactor, the degradation reaction temperature is 300°C, and the reaction time is 6h;
[0039] (2) After the degradation reaction is completed, cool to room temperature, and then add the dissolving agent dimethyl sulfoxide, and the mass ratio of the degradation product mixture to the added dimethyl sulfoxide is 1:1. Remove solid residue (mainly catalyst) by filtration to obtain a clear solution;
[0040] (3) Add precipitant chloroform to the clear solution, the mass ratio of chloroform added to dimethyl sulfoxide is 5:1. The styrene maleic anhydride block copolymer SMA resin is precipitated, filtered, washed and dried to obtain the styrene maleic anhydride bloc...
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