摘要:
The present invention relates to molding compositions comprising polycondensates, particulate graft copolymers, copolymer made from vinylaromatic monomer and acrylonitrile and/or methacrylonitrile, fibers, polycarbonate, carbon black and customary additives. Moldings and composites made from this molding composition are described as are recycled materials from these, and the use of the molding compositions, moldings, composites and recycled materials.
摘要:
Graft copolymers (P1) contain, in any desired sequence, at least (P1.1) a hard segment having a glass transition temperature of at least 11.degree. C., which contains at least one vinylaromatic monomer as the monomer or as one of two or more monomers copolymerizable with one another and a crosslinker component comprising at least dihydrodicyclopentadienyl acrylate as a crosslinking agent having two or more functional groups of different reactivity and at least one crosslinking agent having two or more functional groups of the same reactivity, and (P1.2) a soft segment having a glass transition temperature of not more than 10.degree. C., which contains at least one acrylate as the monomer or as one of two or more monomers copolymerizable with one another, and blends and thermoplastic materials contain said graft copolymers.
摘要:
Anionic polymerization is used for the preparation of reaction mixtures comprising homopolymers, copolymers or block copolymers, and of homopolymers, copolymers and block copolymers which comprise acrylates or methacrylates or acrylates and methacrylates, wherein olefinically unsaturated compounds which are not acrylate or methacrylate derivatives are employed as solvent or as solvent component.
摘要:
Compounds of the general formula (I):H(--CH.sub.2 --CR.sup.1 R.sup.2).sub.m (--CH.sub.2 --CR.sup.1 R.sup.3).sub.n --H (I)whereR.sup.1 is H or methyl,R.sup.2 is --C(O)--Y--R.sup.4, where R.sup.4 is H, methyl, ethyl or allyl,R.sup.3 is --C(O)--Y--allyl andY is O or NH,orR.sup.1 is H or C.sub.1 -C.sub.20 -alkyl,R.sup.2 is H andR.sup.3 is (--CH.sub.2 --CR.sup.5 .dbd.CR.sup.6 --CH.sub.2).sub.p --H, where R.sup.5 and R.sup.6 independently are each H,methyl, ethyl or chlorine and p is 1-100,orR.sup.1 is H,R.sup.2 is OH or O-allyl andR.sup.3 is O-allyl,orR.sup.1 is H,R.sup.2 is OH or R.sup.3 andR.sup.3 is (meth)acrylate, --O--C(O)--CH.dbd.CH--COOH or --O--C(O)--CH.sub.2 --C(.dbd.CH.sub.2)--COOH,and m is an integer from 5 to 500,000 and n is an integer from 2 to 100,000, are used as crosslinking agents in particulate emulsion polymers having a glass transition temperature below 0.degree. C. and a mean particle size of from 50 to 1000 nm.
摘要:
The use of a thermoplastic molding composition which is not ABS, comprising, based on the total of the amounts of components A, B, C, and, where appropriate, D, this total being 100% by weight, a: as component A, from 1 to 48% by weight of at least one particulate emulsion polymer which has one or more phases and has a glass transition temperature below 0° C. in at least one phase, and has a median particle size from 50 to 1000 nm, b: as component B, from 1 to 48% by weight of at least one amorphous or semicrystalline polymer, c: as component C, from 51 to 90% by weight of polycarbonates, and d: as component D, from 0 to 47% by weight of conventional addictives and/or fibrous or particulate fillers, or a mixture of these, for producing moldings, or corresponding semifinished products, for the garden sector or animal-keeping sector.
摘要:
In a process for precipitating microsuspension polymers from a suspension comprising them, a polymer dispersion prepared by emulsion polymerization is added to the suspension.
摘要:
Methods are disclosed comprising: (a) mixing (i) an aqueous solution of at least one salt of at least one metal selected from the group consisting of aluminum, magnesium, cerium, iron, manganese, cobalt, nickel, titanium, zinc, zirconium and mixtures thereof with (ii) an aqueous solution of at least one polymer, at a pH value of 3 to 13 and at a temperature T1 of 0 to 50° C. to form a mixture; and (b) heating the mixture at a temperature T2 of 60 to 300° C. to form an aqueous suspension of surface-modified nanoparticulate particles comprising at least one compound selected from the group consisting of oxides, hydroxides, and oxide hydroxides of the at least one metal; along with powders prepared therefrom and uses therefore.
摘要:
The invention relates to thermoplastic nanocomposites, comprising a) a thermoplastic (A), b) at least one compound (B) (delaminated phyllosilicate), whose structure has been built up from negatively charged phyllosilicates and from cations embedded between these, and which have been dispersed uniformly in component (A), and c) a rubber or rubber mixtures (C), where component (C) has a particle size distribution with a d(50) value of from 10 to 1000 nm. The invention further relates to a process for preparing these nanocomposites, and also to their use.
摘要:
The shaped article consists of a) from 5 to 95% by weight of a molding composition A made from at least one thermoplastic polyamide, copolyamide or blends of these as component A1, fillers and/or reinforcing materials, if desired, as component A2, impact modifiers as component A3 and other additives and processing aids as component A4, and b) from 5 to 95% by weight of a molding composition B, made from at least one thermoplastic polyamide, copolyamide or blends of these as component B1, at least one crosslinked elastomeric polymer as component B2 and, if desired, other additives and processing aids as component B3, where, in the shaped article, segments of molding compositions A and B are connected to one another over a relatively large area. These shaped articles may be used in the motor vehicle sector, for example as air or coolant ducts.
摘要:
The invention relates to thermoplastic molding compositions consisting ofA) 98-99.995% by weight, based on A+B, of at least one acrylonitrile-containing polymer, andB) 0.005-2% by weight, based on A+B, of .alpha.-tocopherol.The invention also relates to a method for reducing the formation of residual monomers on thermal stress and shearing of the thermoplastic molding compositions by adding .alpha.-tocopherol.