摘要:
New [1,1,2-tris-(o/p-hydroxyphenyl)-1-phenyl-ethanes] and their preparation by reacting acetophenone derivatives with phenol at temperatures between -20.degree. and 200.degree. C.
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:
The present invention relates to polycarbonate molding compositions containing additives of alkali or alkaline earth metal salts, tetrahalogenophthalimides and optional glass fibers, characterized in that they contain additive amounts of bromine.
摘要:
The present invention is directed to molding compositions comprising aromatic, thermoplastic polycarbonate resins at least some molecular chains thereof are characterized in that their terminal groups contain conjugated double bonds. The invention is further directed to a process for the preparation of said compositions.
摘要:
The instant invention relates to a process for the preparation of linear aromatic polycarbonate resins by the known two-phase interfacial process and is directed to the use of perfluoroalkyl sulfonamides as chain stoppers in said process and is further directed to the polycarbonate resins obtainable by the process which resins are suitable in the preparation of thermoplastic molding compositions.
摘要:
A process for the preparation of polycarbonates from diphenols and/or chlorocarbonic acid esters thereof and phosgene by the two-phase boundary process wherein said polycarbonate is reacted with aryl chlorocarbonate is disclosed; the reaction products are noted for their improved ageing and hydrolysis characteristics which render them useful as thermoplastic molding compositions.
摘要:
The present invention relates to a process for the isolation of polycarbonates containing 18 to 45 mol % of structural units consisting of sulphone-bisphenols, characterized in that the sulphone-bisphenols are subjected to a polycondensation reaction with oligocarbonates containing chloroformic acid ester end groups, the phases are separated, the organic phase is purified and the sulphone-bisphenol polycarbonates are isolated.
摘要:
High impact resistant polymer blends comprising 70-99% by weight of a polyamide and 1-30% by weight of a polyethylene having been oxidized by a special process.
摘要:
Polycarbonates are provided based on aromatic bis-hydroxy compounds which contain s-triazine compounds as linking members between 2 mols of the aromatic bis-hydroxy compounds bonded in each case via an oxygen atom thereof, on the one hand, and via carbon atoms of the s-triazine ring, on the other, the s-triazine rings carrying, on at least one further carbon atom, organic radicals with functional groups, these radicals being bonded via oxygen, nitrogen or sulphur. The novel polycarbonates may be used as selective solvents for hydrocarbons mixed with water or for making resins or coatings.
摘要:
The present invention relates to a process of producing .alpha., .alpha., .alpha., .alpha.', .alpha.', .alpha.'-hexakisaryl-1,3- and -1,4-dimethyl benzenes by reacting .alpha., .alpha., .alpha.', .alpha.'-tetrakisaryl-1,3 or -1,4-bis-(chloromethyl)- or -bis-(hydroxymethyl)- benzenes with 2 to 30 times the molar quantity (based on the tetrakis benzene) of phenol or a substituted phenol.