# US 5,708,079 A · Thermoplastic ABS moulding compositions

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- Number: US 5,708,079 A
- Document ID: US5708079A
- Status: Granted
- Kind: A
- Application number: 08/642,913
- Filed: 1996-05-06
- Granted: 1998-01-13
- Earliest claimed: 1995-05-17
- Assignees: Bayer Aktiengesellschaft
- Inventors: Herbert Eichenauer; Edgar Leitz; Karl-Erwin Piejko; Peter Kruger
- Web page: https://patentgrep.com/patent/US5708079A

## CPC

- C08L 55/02: ABS [Acrylonitrile-Butadiene-Styrene] polymers
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

Thermoplastic moulding compositions containing A) 5 to 95 parts by wt of at least one particle-shaped graft rubber polymer of the ABS type manufactured by emulsion polymerization, in which the graft rubber particles have such a structure detectable by transmission electron microscope photographs, in which the individual particles contain irregular cell-shaped inclusions of resin-forming polymer and the surface of the particles shows such an irregular toothed structure, that for every particle imaged 5 to 30 of such teeth are present, which are distinguished from an idealized round particle (with a diameter d) by a diameter d+d/x with x=3 to 15, B) 95 to 5 parts by wt of at least one particle-shaped graft rubber polymer of the ABS type manufactured by emulsion polymerization, in which the graft rubber particles have such a structure detectable by transmission electron microscope photographs, in which the individual particles do not have a pronounced inner structure as in A) and possess a round particle shape with completely tooth-free surface and optionally C) 0 to 300 parts by wt of at least one thermoplastic rubber-free resin.

## Claims

### Claim 1

Thermoplastic moulding compositions containing
A) 5 to 95 parts by wt of at least one particle-shaped ABS graft rubber polymer manufactured by emulsion polymerisation, in which the graft rubber particles have a structure in which the individual particles contain irregular cell-shaped inclusions of resin-forming polymer and the surface of the particles shows an irregular toothed structure, and for every particle 5 to 30 of such teeth are present, which are distinguished from an idealised round particle (with a diameter d) by a diameter d+d/x with x=3 to 15
B) 95 to 5 parts by wt of at least one particle-shaped ABS graft rubber polymer manufactured by emulsion polymerisation, in which the graft rubber particles have a structure in which the individual particles do not have a pronounced inner structure as in A) and possess a round particle shape with a tooth-free surface and optionally
C) 0 to 300 parts by wt of at least one thermoplastic rubber-free resin.

### Claim 2 (depends on 1)

The thermoplastic molding composition of claim 1, containing 10 to 80 parts of A), 90 to 20 parts of B), and 20 to 250 parts of C).

### Claim 3 (depends on 1)

The thermoplastic molding composition of claim 1, wherein the rubbers A) and B) consists of polybutadiene and grafted-on styrene and acrylonitrile.

### Claim 4 (depends on 1)

The thermoplastic molding composition of claim 1, wherein the rubbers A)and B) consist of polybutadiene and grafted-on styrene and acrylonitrile.

### Claim 5 (depends on 1)

The thermoplastic molding composition of claim 1, wherein thermoplastic component C) is present and is selected from the group consisting of styrene/acrylonitrile-copolymer, .alpha.-methylstyrene/acrylonitrile-copolymer, aromatic polycarbonate, aromatic polyester carbonate, polyester, and polyamide.

### Claim 6 (depends on 1)

A molding produced from the thermoplastic molding composition of claim 1 .