2 results about "Bulk polymerization" patented technology

The invention discloses a styrene-maleic anhydride-nitrophenyl maleimide terpolymer and a preparation method thereof. The terpolymer is characterized by comprising the following components by weight percentage: 50-90 parts of styrene, 1-20 parts of maleic anhydride, and 10-30 parts of nitrophenyl maleimide. The glass transition temperature is 150-200DEG C, a bulk polymerization way is employed forpreparation, firstly part of the styrene is added into a reaction kettle, then a styrene solution with dissolved maleic anhydride and nitrophenyl maleimide is added dropwise into the reaction kettle,the temperature of the reaction kettle is 90-140DEG C, and the pressure is atmospheric pressure, after reaction to a certain degree, high temperature vacuum devolatilization is carried out to obtainthe terpolymer. Compared with the prior art, the preparation method provided by the invention has the advantages of simple process, no waste water, and environment-friendly production process, and theprepared product has high purity, and is suitable for use as a low odor and low emission heat resistant agent for vehicle ABS and household appliance ABS.

The invention specifically relates to a preparation method for a high-impact-resistance high-flowability ABS resin, belonging to the technical field of high-molecular materials. The preparation methodcomprises the following steps: preparing ABS resin with high impact strength by using a DOW continuous bulk polymerization process, adding bulk ABS resin, SAN resin, a plasticizer, a lubricant and acompatibilizer in a certain mass ratio into a mixer for thorough mixing so as to obtain a mixed material; and then feeding the obtained mixed material into a twin-screw extruder for mixing, extruding,drawing, cooling and pelletizing so as to obtain the high-impact-resistance high-flowability ABS resin. The ABS resin prepared in the invention has superior impact performance; at the same time, thecompatibilizer is added during blending, so the compatibility between the ABS resin and the SAN resin is improved, the adhesion between the two polymers is increased, and a more stable structure is formed.