摘要:
Thermoplastic moulding compositions ofA. 90 to 30 parts by weight of a copolymer prepared by solution or bulk polymerization of a.sub.1 30 to 45% by weight of .alpha.-methylstyrene, a.sub.2 26 to 35% by weight of acrylonitrile and a.sub.3 44 to 20% by weight of styrene and/or p-methylstyrene, and with a content of incorporated acrylonitrile of 27-30% by weight,B. 5 to 60 parts by weight of a random copolymer of b.sub.1 18 to 24% by weight of maleic anhydride and b.sub.2 82 to 76% by weight of styrene and/or p-methylstyrene andC. 5 to 40 parts by weight of a graft polymer of 70 to 30% by weight of a mixture of c.sub.1 a vinylaromatic and/or C.sub.1 -C.sub.4 -alkyl and c.sub.2 acrylonitrile, on 30 to 70% by weight of a rubber with a glass transistion temperature of less than -10.degree. C.
摘要:
Process for the preparation of thermoplastic copolymers of .alpha.-methylstyrene and acrylonitrile by continuous bulk copolymerization ofA. 30 to 50 mol % of .alpha.-methylstyrene andB. 70 to 50 mol % of acrylonitrileat temperatures from 60.degree. to 120.degree. C. with average residence times of 4 to 12 hours in the presence of initiators which supply free radicals, carried out in at least two continuously operated mixed tank reactors, characterized in that 100 molar parts of a monomer mixture ofA.sub.0. 34 to 52 mol % of .alpha.-methylstyrene andB.sub.0. 66 to 48 mol % of acrylonitrileare fed continuously into the first tank reactor per unit time, and, with back-mixing, are copolymerized up to a conversion of 5 to 30 molar parts to give a copolymer of the compositionA.sub.1. 49 to 53 mol % of .alpha.-methylstyrene andB.sub.1. 51 to 47 mol % of acrylonitrile,and the mixture consisting of 70 to 95 molar parts of the monomers A and B and 5 to 30 molar parts of the copolymer of the composition A.sub.1 -B.sub.1 is transferred continuously to the second tank reactor and is polymerized there up at a further conversion of 5 to 55 molar parts to a total conversion of 20 to 60 molar parts to give further copolymer of the compositionA.sub.1. 49 to 53 mol % of .alpha.-methylstyrene andB.sub.1. 51 to 47 mol % of acrylonitrile,0,5 to 11.5 molar parts of acrylonitrile being removed from the vapor condenser of the second tank reactor and recycled to the first tank reactor per unit time.
摘要:
The invention relates to polymer mixtures with a mat surface, based on graft polymers with acid functions and thermoplastic resins with basic functions.
摘要:
This invention relates to polyamide moulding compounds with improved processibility; to a process for their preparation, to their use for the production of moulded parts, sheet products, fibres and composite materials and to the moulded parts, sheet products, fibres, semi-finished products, composite materials and other articles produced from these moulding compounds. The invention is characterized by the use of small quantities of special amides and/or ureas which impart significantly improved flowability to the moulding compounds.
摘要:
Glass-fiber-reinforced ABS-molding compositions comprising(a) from 60 to 98% by weight of an ABS-plastic;(b) from 2 to 40% by weight of sized glass fiber; and(c) from 0 to 5% by weight of one or more additives,the glass fiber being treated with a size which contains a polymer containing epoxide groups and a copolymer of, on the one hand, styrene, nuclear-methylated styrene, .alpha.-methyl styrene, methylmethacrylate or a mixture thereof and, on the other hand, acrylonitrile.
摘要:
This invention relates to mixtures of polyarylene sulphides, nitroarylketo compounds, electron rich aromatic compounds, glass fibres and optionally other fillers (additives). The mixtures are distinguished by good mechanical properties.
摘要:
The invention relates to ABS moulding compositions based on selected copolymers and, optionally graft polymers of olefinically unsaturated monomers which are suitable for the preparation of ABS and silicon derivatives which are capable of copolymerization, the flame resistant properties of these moulding compositions being improved in comparison with conventional ABS material.
摘要:
This invention relates to mixtures of polyarylene sulphides, nitroarylmethylidene ketones, glass fibers and optionally other fillers. The mixtures are distinguished by good mechanical properties.
摘要:
Thermoplastic moulding compositions consisting ofI. 75 to 99.5% by weight of a polymer ofA. 0 to 95% by weight, 95% or less by weight; of a graft copolymer prepared by grafting polymerization ofA.1 5 to 95% by weight of a mixture ofA.1.1 50 to 95% by weight of styrene, .alpha.-methylstyrene, nuclear-substituted styrene, methyl methacrylate or mixtures thereof andA.1.2 50 to 5% by weight of (meth)acrylonitrile, methyl methacrylate, maleic anhydride, N-substituted maleimide or mixtures thereof onA.2 95 to 5% by weight of a rubber with a glass transition temperature Tg or