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公开(公告)号：DE3149358A1
公开(公告)日：1983-06-16
申请号：DE3149358
申请日：1981-12-12
Applicant: BASF AG
Inventor： HAMBRECHT JUERGEN DIPL CHEM DR , SCHMITT BURGHARD DIPL CHEM DR , SWOBODA JOHANN DIPL CHEM DR , WASSMUTH GEORG DIPL CHEM DR , BERNHARD CLAUS DIPL CHEM DR , STEPHAN RUDOLF DIPL CHEM DR
Abstract: The invention relates to a thermoplastic molding material of an elastomeric polymer A, a shell B grafted to the polymer A, and a copolymer C as rigid matrix. The amount of polymer A is 1 to 25 percent by weight based on the weight of A+B+C. It has a glass transition temperature, Tg, of less than 0 DEG C. and an average particle size of 200 to 750 nanometers (d50 value of the integral mass distribution) and is composed of: 50 to 99.9 percent by weight of at least one alkylacrylate with 1 to 8 carbon atoms in the alkyl radical and 0.1 to 5 percent by weight of a polyfunctional monomer which has a crosslinking action. Grafting shell B represents 5 to 40 percent by weight based on A+B+C and is composed of at least one of the monomers of the group of (b1) vinylaromatic monomers, and (b2) the ethylenically unsaturated monomers. Grafting shell B is prepared in two stages with 30 to 70 percent by weight of the monomers b1 being used in the first stage, and 30 to 70 percent by weight of a mixture of monomers b1 and b2 in a weight ratio of 90:10 to 60:40 being used in the second stage. Copolymer C is added in an amount of 35 to 94 percent by weight based on A+B+C and consists of a vinylaromatic monomer and an ethylenically unsaturated monomer. The molding material may contain commonly used additives in effective amounts and is used for the preparation of molded parts.
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公开(公告)号：DE3129472A1
公开(公告)日：1983-02-10
申请号：DE3129472
申请日：1981-07-25
Applicant: BASF AG
Inventor： BRANDSTETTER FRANZ DIPL CHEM D , HAMBRECHT JUERGEN DIPL CHEM DR , STEPHAN RUDOLF DIPL CHEM DR , OVERHOFF HEINZ-JUERGEN DIPL CH , SCHWAAB JOSEF DIPL CHEM DR , BERNHARD CLAUS DIPL CHEM DR , SWOBODA JOHANN DR , ECHTE ADOLF DIPL CHEM DR
Abstract: Thermoplastic molding materials contain a copolymer A and a graft copolymer B. The copolymer A is a hard component comprising one or more copolymers of styrene and/or alpha -methylstyrene with from 20 to 40% by weight of acrylonitrile. The graft copolymer B comprises one or more crosslinked acrylate polymer with a mean particle size of 0.5-0.8 mu m (d50 value of the cumulative mass distribution), a particle distribution, expressed by the ratio in the range Q>/=0.6, and a glass transition temperature Tg below 0 DEG C. A mixture of styrene and acrylonitrile in a weight ratio from 88:12 to 65:35 is grafted onto this rubber.
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公开(公告)号：DE2826925A1
公开(公告)日：1980-01-17
申请号：DE2826925
申请日：1978-06-20
Applicant: BASF AG
Abstract: Mixtures which essentially consist of a graft copolymer (A), a graft copolymer (B) and a hard component (C), the latter consisting of copolymers of stryrene and/or alpha -methylstyrene with acrylonitrile. The graft copolymers (A) and (B) are each based on a crosslinked acrylic ester rubber onto which is grafted a mixture of styrene and acrylonitirle. They differ only slightly in chemical composition, but differ substantially in the particle size of the acrylic ester base used for grafting. The weight ratio of the grafting bases can be from 90:10 to 35:65, and the proportion of the two grafting bases together, based on the total mixture, is from about 10 to 35 percent by weight. Mixtures of the above 3 components are weathering-resistant, exhibit a high impact strength, and are easy to color. The use of such mixtures by conventional thermoplastic processing methods, eg. extrusion or injection molding, gives, especially after the material has been colored, vitrually no difference in hue in the vicinity of a gate or of a weld line, so that a great variety of moldings for daily use or for leisure purposes can be produced.
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