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    Production of acrylic coatings
    2.
    发明专利
    Production of acrylic coatings 未知

    公开(公告)号：GB1100386A

    公开(公告)日：1968-01-24

    申请号：GB1891365

    申请日：1965-05-05

    Applicant: BASF AG

    Inventor： LOUIS GERD ,  VOLIMERT BRUNO ,  DRESCHER ERWIN

    IPC: C08G18/62 ,  C08L75/04 ,  C09D133/08

    Abstract: Coated substrates are obtained by applying to the surface of the substrate, e.g. synthetic fabric, metal sheet or wood, a solution comprising an admixture of a polyisocyanate and a copolymer in an inert organic solvent, and curing and/or drying the coating applied; the copolymer used comprising 50-99% by weight of at least one ester of acrylic acid and a C1-C8 alkanol, 1-35% by weight of at least one monomer containing at least one hydroxyl group, at least 50% by weight of this hydroxy-component consisting of at least one bicyclo-[2,2,1]-heptene-(2) derivative having at least one hydroxyl group in the ring or side chains, and 0-25% by weight of at least one further comonomer. The side chains of the bicycloheptene derivative may form another ring system as, for example, in N-b -hydroxyethyl-bicycloheptene - 5,6 - dicarboxylic imide. Suitable hydroxy monomers, additional to the bicycloheptene compounds, include allyl alcohol and diol monoacrylates; optional comonomers include acrylonitrile, styrene and its derivatives, vinyl carbazole, vinyl chloride, vinylidene chloride, vinyl esters, e.g. vinyl acetate, and possibly small amounts of carboxylic acid or amino monomers. Aromatic polyisocyanates are the preferred polyisocyanates. Suitable solvents include ethyl acetate, 2-ethoxyethyl acetate, acetone, tetrahydrofurane, dibutyl ether, toluene and xylene. The coatings may be cured at room or elevated temperature; curing can be accelerated by using tertiary amines, bismuth or lead salts, or tin compounds as catalyst. The coating solution may be pigmented, e.g. with rutile titanium dioxide. Examples illustrate the preparation of the copolymers by solution polymerization in the presence of azodiisobutyronitrile initiator and also, in some cases, diisopropyl xanthic disulphide as chain regulator, part of the reactants being added during the course of polymerization.ALSO:Coated substrates are obtained by applying to the surface of the substrate a solution comprising an admixture of a polyisocyanate and a copolymer in an inert organic solvent, and curing and/or drying the coating applied; the copolymer used comprising 50-99% by weight of at least one ester of acrylic acid and a C1-C8 alkanol, 1-35% by weight of at least one monomer containing at least one hydroxyl group, at least 50% of this hydroxy-component consisting of at least one bicyclo-[2,2,1]-heptene-(2) derivative having at least one hydroxyl group in the ring or side chains (which may form another ring system), and 0-25% by weight of at least one further comonomer. Other hydroxy components of the copolymer include allyl alcohol and diol monoacrylates; further comonomers specified are acrylonitrile, styrene and its derivatives, vinyl carbazole, vinyl chloride, vinylidene chloride, vinyl esters, e.g. vinyl acetate, and small amounts of carboxylic acid or amino monomers. Aromatic polyisocyanates are the preferred polyisocyanates. Suitable solvents include ethyl acetate, thoxy-ethyl acetate, acetone, tetrahydrofurane, dibutyl ether, toluene and xylene. A pigment, e.g. titanium dioxide, may be included in the solution. The solutions may be applied by, e.g. spraying, brushing or knife coating to substrates such as synthetic fibre fabrics, e.g. knitted polyamide fabrics, wood, and sheet metal, e.g. iron. The coatings can be cured at room or elevated temperature; curing can be accelerated by using tertiary amines, bismuth or lead salts, or tin compounds as catalyst.

    Production of bonded non-woven fabrics
    5.
    发明专利
    Production of bonded non-woven fabrics 未知

    公开(公告)号：GB978834A

    公开(公告)日：1964-12-23

    申请号：GB3128463

    申请日：1963-08-08

    Applicant: BASF AG

    Inventor： DRESCHER ERWIN ,  BILLE HEINZ ,  NIESWANDT WERNER

    IPC: D04H1/4334 ,  D04H1/645 ,  D06M15/507 ,  D06M15/59

    Abstract: Now-woven fabrics are bonded by treatment both with an aqueous solution of a polyamine, polyalcohol or polyphenol and also with a solution (the solvent being one which is substantially insoluble in water) of an acid chloride which contains two acid chloride groups in the molecule; the sequence of the treatments with the two solutions is immaterial. Examples of the polyamines, polyalcohols and polyphenols are hexamethylene-diamine, tetramethylene-triamine, phenylene-diamine, ethylene glycol, glycerol, butanediol, butenediol, cyclohexanediol, neopentyl glycol and resorcinol. The acid chlorides used to react with these components are aromatic or aliphatic acid dichlorides such as the dichlorides of oxalic, malonic, succinic, glutaric, adipic, sebacic, maleic and terephthalic acids, or itaconic acid trichloride. Suitable solvents for these acid chlorides include hexane, heptane, cyclohexane, benzene, toluene, chloroform and trichloroethylene. Fibres which may be bonded by the above treatment include nylon 6, nylon 66, linear polyesters, acrylic fibres, natural fibres such as cotton and wool, and inorganic fibres such as glass or mineral wool. The preferred range of concentrations of the solutions with which the fabric is impregnated is from 1 to 10% by weight and impregnation may be effected by repeated dipping in a bath of the solution. Excess liquid may be removed by passage between squeeze rollers. Temperatures above atmospheric may be used if desired. Hydrogen chloride may be liberated by reaction between the two components and suitable alkalis may be included in the aqueous solution to prevent its escape. In Example 1 the aqueous solution contains 0.05% by weight of the adduct of 6 moles of ethylene oxide and 1 mole of p-isooctylphenol; in Example 8 the solution of acid chloride contains 10% by weight of p-hydroxybenzoic acid 2 ethylhexanol ester as plasticizer.

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