Process for the manufacture of ABS polymers and use thereof in p

Details Process for the manufacture of ABS polymers and use thereof in p Process for the manufacture of ABS polymers and use thereof in p

1981-12-10

1983-12-20

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525261, 525316, C08F27904

Patent

active

044218958

ABSTRACT:
A process for making ABS polymer particles comprising continuous polymerization of a mixture of at least one of each of (a) an aromatic vinyl monomer, and (b) an ethylenically unsaturated monomer in a weight ratio of (a):(b) of 90:10 to 10:90 in the presence of at least one of each of (c) a rubber-like polymer in an amount of 3 to 35 percent by weight relative to the total weight of the monomers (a) and (b), (d) a solvent, (e) a radical initiator and (f) an optional chain transfer agent. The process is carried out at temperatures between 80.degree. C. to 180.degree. C. in two or more reaction zones while the reaction mixture is stirred and while the monomers and solvents are removed in a degassing zone. The rubber-like polymer (c) has a solution viscosity of less than 80 mPa.s and a ratio of the solution viscosity of (c) to a percent of solvent expressed by 100[(d)/(a+b+c+d)] equal to or less than 2.5 mPa.s/percent of solvent.

REFERENCES:
patent: 3859388 (1975-01-01), Hill
patent: 3904709 (1975-09-01), Morimoto
patent: 3945976 (1976-03-01), McCurdy
patent: 4255315 (1981-03-01), Anspon
patent: 4282334 (1981-08-01), Walter
patent: 4315083 (1982-02-01), Burk

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