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    85.
    发明专利
    未知

    公开(公告)号：NL144638B

    公开(公告)日：1975-01-15

    申请号：NL297998

    申请日：1963-09-17

    Applicant: BASF AG

    Inventor： BAYERLEIN FRIEDRICH DR ,  WILHELM HANS DR

    IPC: C08G69/18 ,  C08J9/00 ,  C08J9/04 ,  C08G69/16 ,  C08K3/30

    Abstract: Expanded polyamides are produced by heating a mixture of (A) one or more lactams having seven to fourteen ring members, (B) one or more alkaline catalysts, (C) one or more activators and (D) agents which under the prevailing conditions of polymerization volatilize or decompose with the evolution of gas thereby causing the polymerization product to expand, in the absence of substances containing or forming hydroxyl groups to temperatures above the melting point of the lactam and not more than 200 DEG C. and polymerizing the melt with expansion in the presence of 0.05 to 5% by weight of calcined gypsum with reference to the total weight of the polyamide forming materials. Lactams which are suitable are those of omega-aminocarboxylic acids such as caprolactam, oenantholactam, capryllactam, caprilactam and laurolactam. C-substituted lactams, e.g. 4-isopropylcaprolactam and lactams having chain-branching or cross-linking effects, e.g. alkylene-bis lactams may also be used. Suitable alkaline catalysts are metals such as sodium, potassium and calcium or compounds of these metals such as potassamide, sodium alcoholates and sodium hydroxide, organometallic compounds and especially alkali lactamates. Specified activators are acyl-lactams, monoisocyanates, polyisocyanates, acid derivatives such as carboxylic acid halides, esters or anhydrides, but particularly substituted ureas, thioureas, guanidines and urethanes. Examples of these are hexamethylene-1,6-biscarbamidocapryllactam or phenylcarbamidocaprolactam. Suitable expanding agents are aliphatic and cycloaliphatic hydrocarbons such as hexane, octane and cyclohexane, aromatic hydrocarbons such as benzene and toluene and straight-chain and cyclic ethers such as dibutyl ether and dioxane. Liquids having low boiling points, e.g. pentane may be used under pressure. Solid compounds, such as azoisobutyronitrile, benzene sulphonic acid hydrazide and arylsulphazides may also be used. Dyes, fillers and stabilizers may also be incorporated in the mixture.

    87.
    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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