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    Leather finishes - contg copolymers with acetylacetate gps
    37.
    发明专利
    Leather finishes - contg copolymers with acetylacetate gps 未知

    公开(公告)号：DE2236904A1

    公开(公告)日：1974-03-21

    申请号：DE2236904

    申请日：1972-07-27

    Applicant: BASF AG

    Inventor： GULBINS KLAUS DR ,  WUERTELE LOTHAR DR ,  FREYBERG PETER DR

    IPC: C14C11/00

    Abstract: Finishes for material or synthetic leather consist of (a) an aq. dispersion of a copolymer having, acetylacetate gps, which may be mixed with the usual pigments, (b) formaldehyde and/or polyaldehyde, and (c) a polyamine, mixed together or applied successively. The copolymer contains 0.5-50% pref. 20-40% of a polymerizable unsatd. olefin monomer having acetylacetate grps. such as acetylacetates of glycol semi-acrylates or methacrylates (b) is used for cross-linking, as 5-100% by wt. of the copolymer (c) is added to increase the rate of cross-linking. The cross-linking is pref. carried out at 60-80 degrees C. The finishes protect the surface of the leather and fixes the pigments used; they give stability against dry or wet rubbing, and resistance to swelling and solvents.

    38.
    发明专利
    未知

    公开(公告)号：DE1770578A1

    公开(公告)日：1971-10-28

    申请号：DE1770578

    申请日：1968-06-06

    Applicant: BASF AG

    Inventor： GULBINS KLAUS DR ,  WILHELM HANS DR ,  HARTMANN HEINRICH DR ,  ECKELL ALBRECHT DR

    IPC: C08F236/04 ,  C08F15/40

    Abstract: 1,260,354. Butadiene and/or nitrile copolymers resistant to yellowing. BADISCHE ANILIN- & SODA-FABRIK A.G. 5 June, 1969 [6 June, 1968], No. 28521/69. Heading C3P. Copolymers which are resistant to yellowing are prepared by subjecting to free radical polymerization a monomer mixture comprising (a) from 95-5% by weight of butadiene and/or a nitrile of an addition polymerizable carboxylic acid, (b) from 5-95% by weight of at least one other addition polymerizable monomer, and (c) from 2À5-50 p.p.m. (based on (a) and (b)) of a compound which absorbs light in the wavelength range of from 570-605 mÁ and bears at least one addition copolymerizable group. Suitable as nitriles (a) are the nitriles of crotonic, methylenemalonic, acrylic or methacrylic acid. Monomers (b) include styrene, vinyl chloride, vinylidene chloride, alkyl esters of acrylic, methacrylic or maleic acid, vinyl alkanoates, N-vinylpyrrolidone, N-vinylcaprolactam, vinylimidazole, acrylic, methacrylic or maleic acid and anhydrides and amides thereof, hydroxyalkyl acrylates, glycidyl acrylate, and N - methylol- and N - alkoxy - methyl derivatives of acrylamide, methacrylamide, N- acryloylurea, acryloylglyoxalmonoureine and N- acryloylglyoxaldiureine. Monomer component (c) is suitably a blue to violet dye of the azo or anthraquinone series containing one or more acrylic ester or acrylamido groups. Polymerization may be effected by bulk, solution, precipitation or, preferably, emulsion methods. Potassium persulphate is exemplified as catalyst in emulsion polymerizations, and butyl acetate is exemplified as diluent (catalyst not specified) in non-aqueous polymerizations. The copolymers obtained can be used to form films, coatings and laminations.

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