THERMOPLASTISCHE FORMMASSE

• Main Authors: SWOBODA,JOHANN,DR, SCHMITT,BURGHARD,DR, MITULLA,KONRAD,DR, ECHTE,ADOLF,DR
• Format: Patent
• Language: German
• Published: 14.03.1985
• Edition: 3
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

1. A thermoplastic molding composition consisting of A) from 4 to 40% by weight, based on A + B + C, of at least one elastomeric polymer which has an average particle size of from 200 to 750 nm (d50 value of the cumulative weight distribution) and has been constructed from : at least one alkyl acrylate having from 1 to 8 carbon atoms in the alkyl radical and at least one comonomer and B) from 2 to 40% by weight, based on A + B + C, of a shell grafted onto the elastomeric polymer A, the resulting graft copolymer of A + B having an average particle size of from 200 to 750 nm (d50 value of the cumulative weight distribution) the shell containing at least one monomer from the group of b1 ) aromatic vinyl monomers and b2 ) acrylonitrile in copolymerized form and C) from 20 to 94% by weight, based on A + B + C, of a copolymer constructed from c1 ) at least one aromatic vinyl monomer and c2 ) at least one nonaromatic ethylenically unsaturated monomer, wherein the elastomeric polymer A) has been constructed of from 40 to 70% by weight of an alkyl acrylate and from 30 to 60% by weight of butadiene and, furthermore, the graft shell B) is prepared in two stages using, in each case based on B, in the first stage from 20 to 70% by weight of monomer b1 ) and in the second stage from 30 to 80% by weight of a mixture of monomers b1 ) and b2 ) in a weight ratio of 90 : 10 to 60 : 40.