摘要:
A novel process for the production of oligomeric and polymeric telechelic compositions, to the telechelic compositions produced in this manner and to use thereof in the plastics, fibres or lacquer sectors.
摘要:
The present invention relates to binder mixtures for two-component polyurethane coating compositions which dry at room temperature and containa) a polyisocyanate component,b) a hydroxy-functional polyacrylate component based on a mixture of at least two hydroxyl group-containing poly(meth)acrylate resinsi) having a molecular weight (M.sub.n) of 1000 to 100,000,ii) having an at least bimodal molecular weight distribution,iii) prepared by radical copolymerization of olefinically unsaturated monomers in a solvent using monomer mixtures containing less than 50% by weight of monomers carrying hydroxyl groups andiv) wherein the hydroxyl group content of the component having the lowest molecular weight is at least 1.5 times the hydroxyl group content of the component having the highest molecular weight,c) optionally reactive diluents,wherein components a) and b) are present in an amount which corresponds to an NCO/OH equivalent ratio of 0.2:1 to 5:1.
摘要:
Molding compositions having an oxygen index of greater than 0.30 based on high molecular weight aromatic polycarbonates containing 0.5-20% of organic fibers.
摘要:
Thermoplastic moulding compositions of1. 70 - 20 % by weight of graft polycarbonates whose graft stock is a vinyl polymer with a molecular weight of from 10,000 to 100,000, containing from 3 to 10 side chains attached by carbon, each of which contains a hydroxyphenyl group, on which aromatic polycarbonate chains are condensed, and2. 30 - 80 % by weight of graft polymer rubbers obtained by polymerizing a mixture of2.1. 50 - 90 % by weight styrene, .alpha.-methylstyrene, methylmethacrylate or mixtures thereof, and2.2. 10 - 50 % by weight acrylonitrile, methacrylonitrile, methylmethacrylate or mixtures thereof on a diene or acrylate rubber.
摘要:
Thermoplastic moulding compositions ofA. 15 to 80 % by weight of an aromatic polycondensate containing s-triazine rings, andB. 20 to 85 % by weight of a graft polymer obtained by polymerizing a mixture ofB.1. 50 to 90 % by weight of styrene, .alpha.-methyl styrene, methyl methacrylate or mixtures thereof andB.2. 10 to 50 % by weight of acrylonitrile, methacrylonitrile, methyl methacrylate or mixtures thereof,Onto a diene or acrylate rubber, the mixture as a whole containing from 5 to 25 % by weight of s-triazine rings, based on (A) and (B), and 5 to 40% by weight of rubber, based on (A) and (B).
摘要:
Thermoplastic moulding composition composed ofA. 10 - 50 parts of a graft copolymer of styrene, methylmethacrylate or mixtures and acrylonitrile or acrylic acid esters onto a butadiene homo- or copolymer having a particle size of 0.05 to 0.19 .mu.,B. 80 - 10 parts by weight of a copolymer ofA. 50 - 90 % by weight of styrene and/or .alpha.-methylstyrene,B. 10 - 50 % by weight of acrylonitrile and/or acrylic acid ester, andC. 10 - 80 parts by weight of polycarbonate.
摘要:
The invention is directed to flame-resistant, transparent aromatic polycarbonate compositions comprising polycarbonate resin and an additive amount of a member selected from the group consisting of aldehyde-bisulphite adducts and ketone-bisulphite adducts.
摘要:
The subject disclosure is concerned with a process for synthesizing soluble thermoplastic graft polymers of polycarbonate and ethylenically unsaturated monomers by polymerizing these monomers and aromatic polycarbonates carrying addition polymerizable end groups in a dilute solution of no more than 30 wt. % of reactants based on the weight of solution. The graft polymers so obtained are also encompassed by the inventive concept.
摘要:
The present invention relates to high-molecular weight aromatic polycarbonates, based on diphenols and monofunctional chain stoppers, corresponding to the formula (I) ##STR1## in which Z denotes the radical of a diphenol,n denotes an integer from about 20 to 400,E denotes ##STR2## wherein m denotes 0 or 1 andR denotes H or C.sub.1 -C.sub.3 -alkyl.The present invention also relates to a process for the preparation of the polycarbonates of the formula (I) comprising reacting diphenols of the formula (II)HO--Z--OH (II)whereinZ is a divalent aromatic radical, and/or their chlorocarbonic acid esters in accordance with the processes which are known for the preparation of polycarbonates, in a homogeneous or heterogeneous phase system, with compounds of the formula (III) ##STR3## wherein m denotes 0 or 1 andR denotes H or C.sub.1 -C.sub.3 -alkyl.The present invention also relates to a process for cross-linking the polycarbonates of the formula (I) with UV light, after adding a photoinitiator and, optionally, flameproofing and photo-reducing agents. Finally, the present invention relates to the cross-linked polycarbonates obtained via this process.
摘要:
Phosphites of the general formula: ##STR1## in which N.sub.1 IS AN INTEGER; n.sub.2 is 0 or an integer; n.sub.3 is an integer;At least one of the groups R is an oxetane group as hereinafter defined or a hydrocarbon radical being substituted at least by one oxetane group as hereinafter defined;The remaining groups R are selected from alkyl, aralkyl, cycloalkyl, aryl and hetaryl groups; andThe group or groups Ar are the same or different at-least-divalent aromatic groups the free valencies of which are directly linked to the aromatic nuclei;And a process for their preparation.
摘要翻译:亚磷酸酯,其通式如下:,其中N1是AN INTEGER; N2 IS 0或一个整数; N3是整数; 基团中的至少一个R是下文定义的氧杂环丁烷基团或至少被一个如下文定义的氧杂环丁烷基团取代的烃基; 剩余基团R选自烷基,芳烷基,环烷基,芳基和杂芳基; 和基团Ar是相同或不同的至少二价芳族基团,其自由基直接连接到芳香核上; 及其制备方法。