Thermoplastic molding material

Details Thermoplastic molding material Thermoplastic molding material

1995-09-13

1997-12-23

Zemel, Irina S.

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

Synthetic resins

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

525316, C08F29702

Patent

active

057008760

ABSTRACT:
In a process for preparing a thermoplastic molding material comprising from 80 to 50% by weight of a hard matrix of an anionically polymerized aromatic vinyl compound and from 20 to 50% by weight of a soft phase uniformly distributed in the hard matrix, the percentages being based in each case on the sum of the hard matrix and soft phase, a rubber-elastic block copolymer based on an aromatic vinyl compound and on an alkadiene in a weight ratio of 5:95 to 55:45 is anionically polymerized in a first stage, if desired the living chain ends are capped and the aromatic vinyl compound is polymerized in the presence of the block copolymer with renewed addition of an anionic initiator and while stirring, and the living chain ends are finally (re)closed.

REFERENCES:
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patent: 4362849 (1982-12-01), Tung
patent: 4939208 (1990-07-01), Lanza et al.
patent: 4956415 (1990-09-01), Dennis
patent: 5206302 (1993-04-01), Kohsaka
patent: 5231142 (1993-07-01), Tsugokura
patent: 5491193 (1996-02-01), Erikson

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