-
公开(公告)号：CA1255832A
公开(公告)日：1989-06-13
申请号：CA478834
申请日：1985-04-11
Applicant: BASF AG
Inventor： MITULLA KONRAD , HAMBRECHT JUERGEN , ECHTE ADOLF , SWOBODA JOHANN , SIEBEL PETER , SCHWAAB JOSEF , FRANK HERBERT
Abstract: - 20- O.Z. 0050/37071 A thermoplastic molding material consists of from 10 to 90 parts by weight of a polycarbonate A and from 90 to 10 parts by weight of a graft copolymer B having a mean particle size of from 200 to 700 nm (d50 value of the integral mass distribution). The graft polymer B is formed from an elastomer (rubber) b1), which accounts for from 10 to 80% by weight, and a grafted shell b2), which accounts for from 90 to 20% by weight, the percentages in each case being based on B). The elastomer b1) is composed of from 50 to 99.9% by weight of an alkyl acrylate, where alkyl is of 1 to 8 carbon atoms, and from 0.1 to 5% by weight of a copolymerizable polyfunctional crosslinking monomer. The grafted shell b2) is produced in three stages and contains, as graft monomers, b2a1) from 5 to 40% by weight of a monoethylenically unsaturated aromatic hydrocarbon of not more than 12 carbon atoms, in the first stage, b2a2) from 15 to 50% by weight of a mixture of a monoethylenically unsaturated aromatic hydrocarbon of not more than 12 carbon atoms and a copolymerizable ethylenically unsaturated monomer, in a weight ratio of from 90:10 to 60:40, in the second stage, and b2a3) from 10 to 85% by weight of an alkyl (meth) acrylate in the third stage, the percentages in each case being based on b2).
-
公开(公告)号：CA1255833A
公开(公告)日：1989-06-13
申请号：CA478835
申请日：1985-04-11
Applicant: BASF AG
Inventor： MITULLA KONRAD , HAMBRECHT JUERGEN , ECHTE ADOLF , SWOBODA JOHANN , SIEBEL PETER , SCHWAAB JOSEF , FRANK HERBERT
Abstract: - 20 - O.Z. 0050/37072 A thermoplastic molding material consists of a polycarbonate A and a graft copolymer B, the latter consisting of an elastomer (rubber) b1) and a shell b2) grafted onto the elastomer. The elastomer b1) contains, as copolymerized units, from 35 to 100% by weight of a diene from the group consisting of the conjugated dienes of 4 or 5 carbon atoms, and can contain, as copolymerized units, from 0 to 65% by weight of a monomer from the group consisting of the alkyl acrylates or alkyl methacrylates, where alkyl is of 1 to 8 carbon atoms. The shell b2) is obtained in a conventional manner by successive polymerization of the monomers constituting the shell, in two process steps, in the presence of the elastomer b1); in a first process step, from 10 to 90% by weight of a mixture of a vinylaromatic hydrocarbon and one or more ethylenically unsaturated monomers which differ from the said hydrocarbon, in a weight ratio of from 90:10 to 60:40, are first incorporated as copolymerized units, followed by the polymerization of from 90 to 10% by weight of a monomer from the group consisting of the alkyl acrylates or of the alkyl methacrylates, where alkyl is of 1 to 8 carbon atoms. The molding material is used for the production of shaped articles.
-
公开(公告)号：CA1263992A
公开(公告)日：1989-12-19
申请号：CA495489
申请日：1985-11-15
Applicant: BASF AG
Inventor： BRANDT HERMANN , FISCHER HERMANN , DREHER HERMANN , HEIL EDUARD , HAMBRECHT JUERGEN , NAARMANN HERBERT , ECHTE ADOLF , GAUSEPOHL HERMANN , SIEBEL PETER , SWOBODA JOHANN , SCHWOEBEL GERD , NIKLES ALBERT
Abstract: Disclosed is a process of preparation of polyphenylene ethers from monohydric phenols, which possess alkyl substituents in the two ortho-positions and, if desired, in the meta-position, but not in the para-position, by an oxidative coupling reaction with oxygen at from 15 to 50.degree.C and under from 1 to 10 bar in the presence of a catalyst complex, of a solvent and, if required, of an activator. In this process,the conversion of the phenols is carried out in two or more reaction zones. Some or all of the solvent, catalyst complex phenols and where relevant, activator are initially added to one of the reaction zones and are circulated in the other reaction zone and about 60-100% of the stoichiometric amount of oxygen required for the oxidative coupling is introduced into the first reaction zone and from 0 to about 40% of the said stoichiometric amount is introduced into the second reaction zone. This process is interesting in that it makes it possible to carry out oxidative coupling of phenols with oxygen in a very economic and reliable manner, with very high space-time yields, formation of only a small amount of by-products, and minimum emissions of gas and volatile components.
-
-
Search Results
3
records
(took 0.01 seconds)
