摘要:
Thermoplastic molding materials containing, as essential components,(A) 5-95% by weight of a partially aromatic copolyamide essentially composed of(A.sub.1) 20-90% by weight of units derived from terephthalic acid and hexamethylenediamine(A.sub.2) 0-50% by weight of units derived from .epsilon.-caprolactam and(A.sub.3) 0-80% by weight of units derived from adipic acid and hexamethylenediamine,(B) 5-95% by weight of a polyphenylene ether,(C) 0-45% by weight of a vinylaromatic polymer and(D) 0-40% by weight of a rubber impact-modifier, are prepared.
摘要:
Thermoplastic molding materials contain, as essential components,A) 5-92% by weight of a polyphenylene ether which can contain up to 50% by weight of a styrene polymer which differs from C),B) 5-92% by weight of a nylon,C) 3-50% by weight of a copolymer composed of C.sub.1) 97-99.9% by weight of styrene and/or substituted styrenes of the general formula I ##STR1## where R is hydrogen, alkyl of 1 to 8 carbon atoms or halogen, R.sup.1 is alkyl of 1 to 8 carbon atoms or halogen and n is 0, 1, 2 or 3,C.sub.2) 0.1-3% by weight of an .alpha.,.beta.-unsaturated dicarbonyl compound andC.sub.3) 0-10% by weight of further, nonionic comonomers, andD) 0-35% by weight of a rubber impact modifier.
摘要:
Thermoplastic molding materials based on polyphenylene ethers and nylons are prepared in an extruder by a continuous process in which a modified polyphenylene ether is prepared in a first zone of the extruder and is then mixed with nylons and, if required, further additives in one or more further zones.
摘要:
Self-extinguishing, thermoplastic polyphenylene ether/polyamide molding materials contain, as essential components,(A) from 10 to 90% by weight of component (A), which consists of(A.sub.1) from 70 to 99% by weight of a modified polyphenylene ether,(A.sub.2) from 1 to 30% by weight of a compound containing bound phosphorus, the percentages by weight being based on the total weight of component (A), and(B) from 90 to 10% by weight of component (B), which consists of(B.sub.1) from 80 to 99% by weight of one or more polyamides and(B.sub.2) from 1 to 20% by weight of one or more compounds containing a bound triazine radical and from the group consisting of cyanuric acid and its derivatives.
摘要:
Graft polymers of(A) a polyphenylene ether as a base polymer and(B) a half ester of an unsaturated dicarboxylic acid of the general formula ##STR1## as a graft monomer, where R.sup.1 is C.sub.1 -C.sub.25 -alkyl, C.sub.2 -C.sub.25 -alkylene or aryl, R.sup.2 and R.sup.3 are each H, Br, Cl or one of the radicals R.sup.1, and Q is H or an alkali metal, an alkaline earth metal or an ammonium cation,with or without(C) further olefinically unsaturated monomers,and their preparation.
摘要:
An anionically polymerized impact-modified polystyrene has a yield stress of at least 24 MPa, measured at 23° C. to DIN 53455 and a hole impact strength of at least 11 kJ/m2, measured at 23° C. to DIN 53753, measured in each case on a specimen produced to ISO 3167. A preparation process is described.
摘要翻译:阴离子聚合的冲击改性聚苯乙烯具有至少24MPa的屈服应力,在23℃下根据DIN 53455测量,并且在23℃根据DIN 53753测量的孔冲击强度为至少11kJ / m 2,测量 在每种情况下都是根据ISO 3167生产的样品。描述了制备过程。
摘要:
A process for preparing impact-modified styrene polymers (HIPS) omprises anionic polymerization of styrene in the presence of a rubber in one or more polymerization reactors in succession. The rubber is prepared in solution in an immediately upstream process. The heat of polymerization is utilized to remove the solvent for the rubber, this solvent having a boiling point lower than those of styrene and ethylbenzene, from at least one of the polymerization reactors via distillation with distillative cooling, and the solvent is reintroduced into the process of rubber preparation.
摘要:
In a process for the preparation of block copolymers from vinylaromatic monomers and dienes, the monomers are polymerized in the presence of at least one alkali metal organyl or alkali metal alkoxide and at least one magnesium, aluminum or zinc organyl.
摘要:
In the preparation of a rubber-modified molding material, in a first stage, a first mixture (A) contains at least one alkyl acrylate or methacrylate (a) of the formula (I) ##STR1## where R.sup.1 is hydrogen or methyl and R.sup.2 is alkyl of 1 to 32 carbon atoms, a compound (b) of the formula (II) ##STR2## where R.sup.3 is hydrogen or methyl, R.sup.4 is hydrogen or alkyl of 1 to 8 carbon atoms, R.sup.5 is hydrogen or methyl and R.sup.6 is hydrogen or alkyl of 1 to 10 carbon atoms, preferably hydrogen, and, if required, a first monomer (c) or a plurality thereof is polymerized with free radicals to give a rubber (B),in a second stage, the resulting rubber (B) is mixed with a second monomer (d) or with a plurality thereof, preferably dissolved or swollen therein, to form a second mixture (C), andin a third stage, the second mixture (C) formed by mixing is polymerized with free radicals to give the rubber-modified molding material (D).
摘要:
In a process for preparing block copolymers of styrene or its equivalents on the one hand and of butadiene or its equivalents on the other hand by sequential anionic polymerization, in which a first monomer and the organometallic compound serving as initiator are first of all combined to form a reaction mixture and the reaction is continued until at least part of the first monomer has been consumed, and then at least one further monomer is added and is in each case partially or completely reacted, the polymerization is carried out continuously in a conventional manner in a tubular reactor, the reaction of in each case one monomer being carried out in each case in one reactor section and at least two reactor sections being separated by a mixing stretch.