| 摘要 |
The invention relates to the field of thermoplastic moulding materials, more particularly the use of elastomers to modify such materials to improve their impact resistance. …<??>A problem with this approach is that when elastomers are blended with thermoplastic polymers such as styrene/ acrylonitrile copolymers the flexural strength of the material is considerably reduced. …<??>The invention provides a thermoplastic moulding material comprising styrene/acrylonitrile copolymer, an elastomeric material having an elongation at break greater than the styrene/acrylonitrile copolymer, a polyimide prepolymer and a reinforcing filler. …<??>The polyimide prepolymer is an addition polyimide prepared from a polyamine and a bis-imide of an unsaturated carboxylic acid. …<??>The reinforcing filler is glass fibre or mica, although other fillers may be included along with these. …<??>The elastomeric material may be a sulphur vulcanizable rubber or a thermoplastic rubber. If vulcanizable, the rubber is preferably used uncured. …<??>Use of the moulding material is in the manufacture of moulded plastics articles. |
