# US 5,346,945 A · Glass fiber-reinforced styrene copolymers

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- Number: US 5,346,945 A
- Document ID: US5346945A
- Status: Granted
- Kind: A
- Application number: 08/110,216
- Filed: 1993-08-23
- Granted: 1994-09-13
- Earliest claimed: 1992-08-27
- Assignees: BASF SE
- Inventors: Andreas Deckers; Norbert Guentherberg
- Web page: https://patentgrep.com/patent/US5346945A

## CPC

- C08L 25/12: with unsaturated nitriles
- C08L 33/24: Homopolymers or copolymers of amides or imides
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

A thermoplastic molding material comprising (A) a copolymer composed of acrylonitrile plus styrene, a-methylstyrene or a nuclear-substituted styrene derivative or mixtures of these three monomers; (B) a graft copolymer prepared either by (B.sub.1) emulsion polymerization of a monomer mixture, based on either styreneacrylonitrile or styreneacrylonitrile-methyl methacrylate, on a latex, obtained as an emulsion, of an elastomer based on butadiene or acrylic ester as a grafting base, or by (B.sub.2) solution polymerization of a monomer mixture, based on either styreneacrylonitrile or styreneacrylonitrile-methyl methacrylate, on an elastomer, prepared in solution, based on butadiene or acrylic ester or an EPDM elastomer as grafting base; (C) a. reinforcing agent based on an inorganic glass; and (D) a copolymer composed of (D.sub.1) units of the formula I, ##STR1## in which R.sup.1 and R.sup.2 are hydrogen or methyl and R.sup.3 is hydrogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.12 cycloalkyl, C.sub.6 -C.sub.16 aryl or C.sub.1 -C.sub.14 aralkyl, and (D.sub.2) units derived from a copolymerizable monomer selected from styrene, .alpha.-methylstyrene, (meth)acrylonitrile or (meth)acrylic acid esters.

## Claims

### Claim 1

A thermoplastic molding material comprising, based on the sum of A, B, C and D,
A: 30 to 95% by weight of a copolymer A comprising, in each case, based on A
a.sub.1 : 50 to 95% by weight of styrene, .alpha.-methylstyrene, a nuclear-substituted styrene derivative or mixtures of these monomers (a.sub.1) and
a.sub.2 : 5 to 50% by weight of acrylonitrile (a.sub.2)
B: up to 60% by weight of a graft copolymer B
b.sub.1 : prepared either by emulsion polymerization of, based on B, 15 to 85% by weight of a monomer mixture based either on
b.sub.11 : styrene-acrylonitrile in the ratio 9:1 to 4:6, or
b.sub.12 : styrene-acrylonitrile-methyl methacrylate in the ratio 19:1:0 to 8:6:6 on 15 to 85% by weight of a latex, obtained as an emulsion, of an elastomer based on butadiene or acrylic ester as grafting base; or by
b.sub.2 : solution polymerization of, based on B, 15 to 85% by weight of a monomer mixture based on
b.sub.21 : styrene-acrylonitrile in the ratio 9:1 to 4:6 or
b.sub.22 : styrene-acrylonitrile-methyl methacrylate in the ratio 19:1:1 to 8:6:6 on 15 to 85% by weight of an elastomer, prepared in solution, based on butadiene or an acrylic ester or an EPDM elastomer as grafting base;
C: 1 to 40% by weight of a reinforcing agent C based on an inorganic glass, and also
D: 0.1 to 10% by weight of a copolymer D of, based on B,
d.sub.1 : 10 to 90% by weight of units of the formula I ##STR4## in which R.sup.1 and R.sup.2 are hydrogen or methyl and R.sup.3 is hydrogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.12 2-cycloalkyl or C.sub.6 -C.sub.16 aryl or C.sub.6 -C.sub.16 aralkyl, and
d.sub.2 : 10 to 90% by weight of units derived from a copolymerizable monomer selected from styrene, .alpha.-methylstyrene, (meth) acrylonitrile or (meth)acrylic acid esters,
with the proviso that the acid number S of the copolymer D is at least 0.5 meq/g..

### Claim 2 (depends on 1)

A method of using the molding material as claimed in claim 1 for producing molded articles.