摘要:
The present invention relates to mixtures of cycloaliphatic diisocyanates corresponding to formula 1) ##STR1## wherein R represents a saturated, linear, aliphatic hydrocarbon residue having 8 to 15 carbon atoms. The present invention also relates to a process for the preparation of these diisocyanate mixtures and to their use for the production of polyisocyanate addition products.
摘要:
The thermoplastic block copolymers according to the invention of optionally substituted vinyl or vinylidene polymer segments and segments of liquid crystalline polymers are suitable for use as compatibility improvers or dispersing agents in otherwise incompatible or poorly compatible thermoplastic polymer mixtures and may be used for the production of moulded articles, filaments, fibres and films.
摘要:
The present invention relates to aromatic compounds corresponding to formula (I) ##STR1## to their production and to their use as modifiers for thermoplastic aromatic polycarbonates and/or thermoplastic aromatic polyester carbonates and/or thermoplastic aromatic polyesters.
摘要:
The invention relates to new, free-flowing arylene sulfide polymers (PAS) preferably phenylene sulfide polymers, which crystallize with delay, optionally additionally display improved resistance to UV radiation, and are prepared by mixing PAS with aromatic mononitro compounds in the melt, preferably with the application of shearing forces.
摘要:
This invention relates to thermoplastically deformable branched aliphatic polyamides prepared by the hydrolytic polycondensation of lactams in the presence of small quantities of .alpha.-amino-.epsilon.-caprolactam (ACL) and approximately equivalent quantities of polycarboxylic acids (preferably dicarboxylic acids) and to a process for their preparation which is distinguished by considerably reduced polycondensation times without giving rise to cross-linked products. The process optionally in addition employs a solid phase after-condensation in which rapid further condensation takes place to the products with increased melt viscosity which are branched but are still soluble in m-cresol.
摘要:
Thermotropic, fully aromatic polyesters and polyester carbonates are produced by esterification of optionally substituted p-hydroxybenzoic acids and aromatic dicarboxylic acids with diaryl carbonate at temperatures in the range from 100.degree. to 220.degree. C. and subsequent transesterification of the aryl ester obtained with diphenols and, optinally, more diaryl carbonate, accompanied by polycondensation, at temperatures in the range from 250.degree. to 330.degree. C., the esterification, the transesterification and the polycondensation being carried out in the presence of heterocyclic compounds containing 1 to 3 nitrogen atoms.
摘要:
Thermoplastically polyamide moulding compositions produced from at least 70% by weight of polyamide, a long-chain polyester, polyether or hydrocarbon polyol and at most 5% by weight of a polyanhydride or polyepoxide.
摘要:
Polyamide moulding materials which have been reinforced with unsized glass fibres and to which a flame-proof finish has been imparted by means of melamine or melamine cyanurate and which have a high glow wire resistance.
摘要:
This invention relates to a process for the preparation of optionally branched polyarylene sulphides which are distinguished by their substantially lower corrosiveness.
摘要:
Thermoplastic polyamides containing phenolic compounds in quantities of from 0.5 to 15%, by weight, based on polyamide are less sensitive to water.