摘要:
Unsaturated polyester moulding compositions hardenable with low shrinkage which are free-flowing comprise a crystalline unsaturated polyester, a copolymerizable vinyl monomer and a graft-polymerized butadiene polymer.
摘要:
A composition comprisingA. 24-70% by weight of an unsaturated crystalline polyester which is the condensation product of fumaric acid and a glycol of the formulaHO--CH.sub.2 --R--CH.sub.2 --OHwherein R is of the formula (CH.sub.2).sub.z wherein z is 1 to 18 or a symmetrical dialkyl derivative of (CH.sub.2).sub.z wherein the alkyl substituents are situated on the same carbon atom or cycloalkylene,B. 20-70% by weight of styrene andC. 1-30% by weight of at least one member selected from the group consisting of a polycarbonate, polyamide, polyvinyl alcohol, polyvinyl alcohol acetal, polyvinylchloride, cellulose ester of at least one organic acid and polyethylene. Said mixture may additionally contain one or more fibrous reinforcing agents and one or more fillers.
摘要:
Polyester-based mouldings which have been hardened with little shrinkage, do not stick in the mould and therefore can be released from the mould without damage are accessible via moulding compositions containing an unsaturated polyester of defined acid number and certain end groups.
摘要:
Mixtures active as initiators for radical polymerization reactions comprising(1) from 1 to 99% by weight of a substituted diphenyl ethane; and(2) from 99 to 1% by weight of an organic peroxide,and a process for desensitizing organic peroxides.