Patent DE-102005022630-A1 (DE)
Title: Grafting polymer rubbers, useful in thermoplastic molding materials, comprises a grafting base and a grafting layer grafted with the grafting base obtained from vinylaromatic monomers and/or polar copolymerizable monomers
Inventor: MC KEE GRAHAM EDMUND
IPC: C08L51/00
Filed: 2005-05-11
Abstract: Grafting polymer rubbers, obtained from a grafting base (a1) containing a first fraction group (i) by emulsion polymerization of produced particles with a particle diameter of less than 200 nm, and a second fraction (ii) by emulsion polymerization of produced particles with a particle diameter of greater than 550 nm; one or more grafting layer (a2) grafted with (a1) obtained from at least vinylaromatic monomers (a21) and/or at least a polar (a22) with copolymerizable monomers. Grafting polymer rubbers, obtained from a grafting base (a1) containing a first fraction group (i) by emulsion polymerization of produced particles with a particle diameter of less than 200 nm, and a second fraction (ii) by emulsion polymerization of produced particles with a particle diameter of greater than 550 nm, where the sum of the first fraction and the second fraction amounts to at least 75 wt.%, related to the total quantity of the particles of (a1), and the remaining 25 wt.%, related to the total quantity of the particles of (a1), where the particles are produced by emulsion polymerization, exhibits a particle diameter in the intermediate area between the particles of the first fractions and the particles of the second fractions, where (a1) is obtained from at least one alkyl acrylate (a11) with 1-32C atoms in the alkyl, optionally at least polyfunctional, crosslinking monomers (a12), optionally at least further monomers (a13), preferably vinylalkylether with 1-8C atoms in the alkyl, butadiene, isoprene, styrene, acrylonitrile, methacrylnitrile, methylmethacrylate, acrylic acid, methacrylic acid, itaconic acid and maleic acid anhydride, optionally groups (a14), from regulator-, initiator- and/or emulsifying agent systems; where a part or entire part of (a1) additionally exhibit a core, developed from 30-100 wt.% of at least vinylaromatic monomers and 0-70 wt.% of one or more further copolymerizable monomers, in each case related to the total quantity the core of forming monomers; and one or more grafting layers (a2) grafted with (a1), developed from at least vinylaromatic monomers (a21) and/or at least a polar (a22) with copolymerizable monomers, preferably from acrylonitrile, methacrylnitrile, esters of (meth)acrylic acid with 1-4C atoms in the acryl group, maleic acid anhydride and its imides, (meth)acrylamide and vinylalkylethers with 1-8C atoms in the alkyl; optionally groups (a23) from regulator-, initiator- and/or emulsifying agent systems. Independent claims are included for: (1) thermoplastic molding material comprising 5-90 wt.%, preferably 12-60 wt.% of particle forming grafting polymer, 10-95 wt.%, preferably 40-88 wt.% of at least one amorphous polymer, developed from at least vinylaromatic monomers and optionally at least ethylenic unsaturated monomers, or developed from methylmethacrylate and at least vinylaromatic monomers and/or optionally at least a further ethylenic unsaturated monomers, 0-75 wt.% of further polymers (b), preferably polycarbonates, polyamides, polyesters, polyetherketone, polyoxyalkylene, polyarylenesulfide, polyvinyl chloride or thermoplastic polyetherurethane, and 0-60 wt.% of fibers or particle forming fillers; and (2) molded articles, foils, fibers or foams obtained by using the thermoplastic molding materials.