摘要:
A process for the continuous processing of vinyl polymer latices to produce thermoplastically processible vinyl polymer powder by coagulating a stream of a vinyl polymer latex by the addition of a stream of a coagulant with intensive mixing and shearing in a cascade of vessels at an average residence time per vessel of 10 to 60 minutes and at temperatures from 50 to 120.degree. C., volatile auxiliary substances and residual monomers in the polymer being optionally removed by steam distillation and part of the serum separated from the vinyl polymer being added to the stream of coagulant.
摘要:
Thermoplastic materials containing A) 5 to 80 parts by weight of a thermoplastic co- or terpolymer made from the monomers styrene, &agr;-methylstyrene, methyl methacrylate, acrylonitrile with an average molecular weight ({overscore (M)}w) of 70,000 to 119,000, B) 1 to 30 parts by weight of a thermoplastic copolymer made from 60 to 95% by weight of styrene and/or &agr;-methylstyrene and 40 to 5% by weight of acrylonitrile with an average molecular weight ({overscore (M)}w) of 25,000 to 49,500, C) 0.1 to 10 parts by weight of a thermoplastic co- or terpolymer made from the monomers styrene, &agr;-methylstyrene, methyl methacrylate, acrylonitrile with an average molecular weight ({overscore (M)}w) of 1,500 to 6,000 and D) 0.5 to 50 parts by weight of a particulate rafted rubber with a glass transition temperature ≦10° C. and an average particle diameter (d50) of 0.05 to 0.50 &mgr;m, which contains 15 to 80 parts by weight of a chemically bonded polymer made from styrene, methyl methacrylate, acrylonitrile or mixtures thereof, per 100 parts by weight of rubber and optionally E) 10 to 300 parts by weight of an aromatic polycarbonate and/or poly-alkylene terephthalate per 100 parts by weight of A+B+C+D, or F) 1 to 40 parts by weight of a thermoplastic polyurethane.
摘要翻译:含有A)的热塑性材料5至80重量份由单体苯乙烯,α-甲基苯乙烯,甲基丙烯酸甲酯,平均分子量({超芯(M)} w)的单体制得的热塑性共聚物或三元共聚物为70,000至119,000, B)1至30重量份由60至95重量%的苯乙烯和/或α-甲基苯乙烯和40至5重量%的平均分子量({超芯(M)} w的丙烯腈制成的热塑性共聚物 )为25,000至49,500,C)0.1至10重量份由单体苯乙烯,α-甲基苯乙烯,甲基丙烯酸甲酯,丙烯腈制成的热塑性共聚物或三元共聚物,其平均分子量({overscore(M)} w)为 1,500至6000和D)0.5至50重量份玻璃化转变温度<= 10℃,平均粒径(d50)为0.05至0.50微米的颗粒状筏式橡胶,其含有15至80重量份的 由苯乙烯,甲基丙烯酸甲酯,a。制成的化学键合聚合物 丙烯腈或其混合物,每100重量份橡胶和任选的E)10至300重量份的芳族聚碳酸酯和/或聚对苯二甲酸亚烷基酯/ 100重量份的A + B + C + D,或F)1至 40重量份的热塑性聚氨酯。
摘要:
Thermoplastic molding compositions containingA) ABS-type resin,B) aromatic polycarbonate resins,C) a compound bearing several carboxyl groups or mixtures thereof and optionallyD) further polymer resins,characterized in that an ABS resin with at least one basically acting additive is used as component A, component C is selected from compounds having a molecular weight of from 150 to 260 having at least two carboxyl groups (--COOH) in the molecule, and the weight ratio of basically acting additive in A: carboxyl groups in C is from 5:1 to 1:1.
摘要:
Thermoplastic moulding compounds containing(A) from 5 to 90 parts by weight of one or more thermoplastic polymers,(B) from 5 to 90 parts by weight of one or more graft polymers and(C) from 0.25 to 40 parts by weight of a copolymer having a sequential structure corresponding to the idealized formula (I)(A-X-B).sub.n (I)whereinA=a polymer of a cyclic carbonate,B=a polymer of another cyclic ester andX=a middle member containing both partial structures of A and B.
摘要:
Elastic-thermoplastic or thermoplastic powder-form moulding compositions having uniform particles size and improved thermal stability and processes for their manufacture.
摘要:
Process for the preparation of a thermoplastic moulding composition of 10 to 65% by weight of at least one graft polymer which is obtainable by emulsion polymerization of styrene and acrylonitrile in a weight ratio of 90:10 to 50:50, it being possible for all or some of the styrene to be replaced by .alpha.-methylstyrene or methyl methacrylate, in the presence of at least one rubber base, and the weight ratio of monomers employed to rubber polymer employed being 20:80 to 70:30, and 90 to 35% by weight of a copolymer of styrene and acrylonitrile in a weight ratio of 90:10 to 50:50, it being possible for all or some of the styrene to be replaced by .alpha.-methylstyrene or methyl methacrylate, wherein, to prepare the graft polymer, the grafting monomers and 0.05 to 1.00 part by weight (per 100 parts by weight of grafting monomer) of a mercaptan are added stepwise to the latex of the rubber base over a period of time, the part amount of the monomer added in each time interval .DELTA.t.sub.n+1 being 0.30 to 0.95 times the amount of monomer added in the preceding time interval .DELTA.t.sub.n at least in the first half of the period of time, and the total period of time comprising n time intervals where n=3 to 30, and each time interval .DELTA.t being 5 to 100 minutes long.
摘要:
Sulphur-containing elastic-thermoplastic graft products of styrene, .alpha.-methyl styrene, p-methyl styrene, vinyl toluene, acrylonitrile or methyl methacrylate or mixtures thereof on a particle-like rubber with an average particle diameter (d.sub.50) of from 0.05 to 20.0 .mu.m and a glass temperature .ltoreq.10.degree. C. with a total rubber content of from 1 to 80% by weight, whereby the graft products have a sulphur content of from 1.15 to 3.95% by weight and the thermoplast proportion of the polymerized monomers on the particle-like rubber has a limiting viscosity of from 2 to 15 ml/g (measured in dimethyl formamide at 25.degree. C.) and in which at least 90% by weight of the incorporated sulphur is present as a constituent of terminal C1-18-thioalkyl groups.
摘要:
Elastic-thermoplastic and thermoplastic powder-form moulding compositions of uniform particle size and improved thermal stability at made by incorporating a sulphur containing polymer.
摘要:
Thermoplastic molding compounds comprising three resin components with different molecular weights and two graft rubbers. The thermoplastic molding compounds have good toughness, high heat resistance, adjustable surface gloss and good thermoplastic processability. The invention also relates to a process for the production of the molding compounds.
摘要:
Reaction products of 1 mol of a cycloaliphatic diol corresponding to formula IHO--R--OH Iwith 2 mols cycloaliphatic carboxylic anhydrides corresponding to formulae II and/or III ##STR1## in which R is a cycloaliphatic hydrocarbon radical having 6 to 20 carbon atoms onto which the hydroxy groups are bonded directly or via methylene groups and X represents ##STR2## chemical bond --obtainable obtainable by fusion of the cycloaliphatic diol and the cycloaliphatic carboxylic anhydride in an inert gas atmosphere at temperatures of from 100.degree. C. to 250.degree. C., and the alkali and ammonium salts of these reaction products, and their use as emulsifiers.