Abstract:
Kälteschlagzähe thermoplastische Formmassen aus Polyester und Polycarbonat, enthaltend (A) 5 bis 94 Gew.-Teile mindestens eines aliphatischen Polyesters einer aromatischen Dicarbonsäure, (B) 5 bis 94 Gew.-Teile mindestens eines aromatischen Polycarbonats, (C) 1 bis 4O Gew.-Teile mindestens eines Olefinpolymeren, welches Epoxygruppen enthält, wobei sich die Komponenten A, B und C jeweils auf 1OO Gew.-Teile ergänzen, sowie, (D) gegebenenfalls Zusatzstoffe in wirksamen Mengen.
Abstract:
Process for the preparation of imidazoles substituted in the 2- and/or 4- and/or 5-position by p-nitrophenyl and, if appropriate, additional substituents by reaction of imidazoles substituted in the 2- and/or 4- and/or 5-position by phenyl and, if appropriate, additional substituents with mixtures of sulphuric acid and nitric acid, by carrying out the reaction in the presence of urea.
Abstract:
Continuous prodn. of thermoplastic polyphenylene ether /polyamide moulding materials in an extruder comprises (1) reacting in a first zone at 240-350 deg.C (by wt. w.r.t. total components (a1)-(a5): (a1) 50-99.5% of a polyphenylene ether, (a2) 0-45% of a vinylaromatic polymer, (a3) 0.05-10% of (a31) an alpha-beta-unsatd. carboxylic acid of derivs. of this of formula R1-CO-C(R2)=C(R3)-CO-R4 (I) in which R1 and R4=OH, aryloxy, alkoxy, aralkoxy or cycloalkoxy gps. with up to 12C, or R1 and R4 together=-O- or -NR5-; R2 and R3=H, alkyl or cycloalkyl with up to 12C, aryl or Cl, or R2 and R3 may together form a 4-12C alkylene gp.; R5=alkyl, cycloalkyl, aralkyl or aryl gp. wit- up to 12C, which may be substd. with 1-4C alkyl or alkoxy gps., and/or (a32) a monomer contg. an amide gp. and a polymerisable double bond, and/or (a33) a monomer contg. a lactam gp. and a polymerisable double bond; and opt. (a4) 0-80% other monomers suitable for grafting and (a5) 0-20% radical initiators, for 0.1-15 mins. to give a modified polyphenylene ether A; and (2) subsequently introducing into a further zone of the extruder at 250-350 deg.C (by wt. w.r.t. total components A-F); (B) 5-95 wt.% of a polyamide, (C) 0-90 wt.% of an unmodified polyphenylene ether, (D) 0-45% of a vinyl aromatic polymer, (E) 0-40% of an impact-improving modifying rubber, (F) 0-60% additives and processing aids, and finally extruding the mixt..
Abstract:
Thermoplastics moulding compsn. contains (w.r.t. A+B) (A) 5-95 (wt.)% resin(s) consisting of (a1) 8-12C vinylaromatic monomer(s), (a2) alpha,beta-unsatd. dicarbonyl monomer(s) and (a3) elastomer(s) (rubber) and (B) 95-5% polyamide(s). The novelty is that resin (A) is obtd. by grafting (a1) to an unmodified resin in the presence of a3, then modification in the melt at 120-280 deg.C in the presence of a2, using the monomers in such amts. that A consists of 97-50% a1, 0.05-10% a2 and 3-50% a3.
Abstract:
Thermoplastic molding materials contain, as essential components, (A) from 10 to 89.99% by weight of a polyester, (B) from 10 to 89.99% by weight of a polycarbonate and (C1) from 0.01 to 1% by weight of a low molecular weight organic compound of not more than 70 carbon atoms which contains (-SO3)mQ groups where Q is hydrogen, NH4 or an alkali or alkaline earth metal and m is an integer equal to the valency of Q, and/or (C2) from 0.01 to 30% by weight of a polymer containing sulfo groups and having a weight average molecular weight of not less than 1000, and, as a further component, (D) from 0 to 30% by weight of a rubber impact modifier.
Abstract:
Thermoplastic moulding compositions based on A) polyesters and B) polyphenylene ethers, characterised by a content of C) from 0.1 to 40% by weight, based on the sum of A, B and C, of a copolymer comprising c1) from 40 to 99.9 mol % of a vinylaromatic monomer, c2) from 0.1 to 60 mol % of a compound of the formula (I) wherein R is -OH, alkoxy, aryloxy, aralkoxy or alkylaryloxy having up to 25 carbon atoms or, together with R is -NR -, R is -H or, if R is -H, is alkyl, aryl, aralkyl or alkaryl having up to 25 carbon atoms or chlorine, R is -H or, if R is -H, is alkyl, aryl, aralkyl or alkaryl having up to 25 carbon atoms or chlorine, R is alkoxy, aryloxy, aralkoxy or alkylaryloxy having up to 25 carbon atoms or, together with R , is -NR -, and R is hydrogen or an alkyl, cycloalkyl, aralkyl or aryl group having up to 12 carbon atoms which itself may be substituted by C1-C4-alkyl or -alkoxy groups, and c3) from 0 to 20 mol % of further copolymerisable monomers, and the preparation and use thereof.k
Abstract:
Modified polyphenylene ethers comprising A) from 80 to 99.9% by weight of polyphenylene ethers, B) from 0.1 to 20% by weight of an aldehyde or ketone and C) from 0 to 20% by weight of a compound containing at least one of the radicals -NH2, -OH, -SH, -COOH, -S- or -O-(SO)-O-, and the preparation thereof.