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    Production of granular expandable thermoplastic compositions
    33.
    发明专利
    Production of granular expandable thermoplastic compositions 未知

    公开(公告)号：GB1030013A

    公开(公告)日：1966-05-18

    申请号：GB968363

    申请日：1963-03-12

    Applicant: BASF AG

    Inventor： DAUMILLER GUENTHER ,  HERRLE KARL ,  RAUSCHENBACH ROLF DIETER

    IPC: C08J9/00 ,  C08J9/16 ,  C08L25/00 ,  C08L27/04

    Abstract: A granular thermoplastic composition comprises an intimate mixture of (A) at least one substantially halogen free polymer or copolymer derived from aromatic or cycloaliphatic vinyl compounds, (B) at least one polymer or copolymer of vinyl chloride or vinylidene chloride, (C) 2-20% of a gaseous or liquid expanding agent, the weight of (A) being at least 1 1/2 times that of (B) and the chlorine content of the composition being 8-25%. Copolymers (A and (B) may contain up to 30 and 40% respectively of units other than those specified above. In addition to (A) and (B) the composition may contain up to 20% of other polymers and copolymers. Other additives may be: flame retardants, e.g. SbO3, 1,2,5,6,9,10-hexabromocyclododecane, hexabromocyclohexane and tris - (2,3 - di - bromopropyl) phosphate; flame retardant activators, e.g. dicumyl peroxide; plasticizers, e.g. polyvinyl pyrrolidone, hydroxyethyl cellulose, BaSO4 and CaHPO4; organic and inorganic fillers and colouring matter. The composition may be formed by polymerizing the monomer precursors of (A) in aqueous suspension, adding the monomer precursors of (B) and polymerizing them. The first polymerization may be carried out at 50-120 DEG C. in the presence of 0.1-2.0% catalysts, e.g. dibenzoyl peroxide, lauroyl peroxide or azodiisobutyronitrile and 0.0573.0% plasticizers. 0.1-3.0% of catlyst may be added before the second polymerization at 30-80 DEG C. The expanding agent may be added prior to, during or after the second polymerization. In an alternative method polymers (A) and (B) in a plasticized state may be mixed with the other additives in an extruder at 60-220 DEG C. and the resulting solidified composition may be granulated. (A) may be derived from acrylonitrile, acrylic esters, methacrylic esters, acrylamide, maleic esters, itaconic esters, divinyl benzene or butadiene in addition to styrene, a -methyl styrene, o- and p-vinyl toluene and vinyl cyclohexane. Polyvinyl cycloaliphatic compounds may be derived by hydrogenation of polyvinyl aromatic compounds. Copolymers (B) may be partially derived from acrylonitrile, maleic esters, acrylic esters, vinyl acetate, vinyl ethers or vinyl ketones; (C) may boil between 20 and 80 DEG C. and may be a pentane, hexane, cyclopentane petroleum fraction, CH2Cl2, benzene, acetone, ethyl acetate, propane butane or vinyl chloride. 4-12% may be used. In addition to (A) and (B) polymers and copolymers may be present which are derived from: acrylonitrile, itaconic esters, maleic esters, methacrylonitrile or acrylamide. In examples (1-3, 9-15) polymer (A) is derived from styrene and acrylonitrile (1), methylacrylate (11, 12), 2,5-dichlorostyrene (13), divinyl benzene (14), vinyl alcohol (14, 15) and vinyl toluene (15 and 21). Polymer (B) is derived by polymerization in the presence of (A) of vinylidene chloride (1), vinyl chloride (2, 3, 9-15), acrylonitrile (1, 9, 10) and dimethyl maleate (3, 14, 15). Polymeration was carried out in water suspension (1-3, 9, 10, 14, 15) and under nitrogen (1, 9, 10). Other additives are: blowing agents, pentane (1, 3, 9, 10, 14, 15), hexane (2,12 and 13), ethanol (3, 14, 15) and butane (11-13); polyvinylpyrrolidone (1, 9, 10); catalyst, azodiisobutyronitrile and benzoyl peroxide (2, 3, 11-13, 15); plasticizers, sodium carboxymethyl cellulose (2, 11-13) and stearic acid (3, 14, 15); polyvinyl alcohol (3); and flame retardants, SbO3 (3, 14, 15) and sodium phosphate (3, 14, 15). In examples (4-8, 16-20) (A) is derived from styrene (4-6, 8, 16-20), acrylonitrile (6), butadiene (6, 17) and vinyl cyclohexane (7). (B) is derived from vinyl chloride (4-8, 16-19, 20a, 20b), vinylidene chloride (7, 20c), vinyl isobutyl ether (20a), vinyl acetate (20b) and ethyl acrylate (20c). Granules of (A) and (B) are mixed and extruded optionally into water (4-7, 16-20). Additives are: blowing agents: hexane (4, 16), pentane (5, 6, 8, 17-20), ethyl acetate (5, 6, 18-20), acetone (7), petroleum (b.p. 35-45 DEG C.) (7) and propane (17); SbO3 (4-6, 16-19, 20a, 20b); a chloroparaffin (8); hexachlorocyclododecane (20c); polyvinylpyrrolidone (7); ferrocene (8); polybutylacrylate (19) and manganese acetylacetonate (20c). In Example (21) styrene and o-vinyl toluene are copolymerized in the presence of benzoyl peroxide, azodiisobutyronitrile, sodium acetate, and hydroxyethylcellulose.

    Floor coverings from bituminized felt paper sealed with plastics
    38.
    发明专利
    Floor coverings from bituminized felt paper sealed with plastics 未知

    公开(公告)号：GB869434A

    公开(公告)日：1961-05-31

    申请号：GB2845659

    申请日：1959-08-20

    Applicant: BASF AG

    Inventor： HAGEN GUSTAV ,  HERRLE KARL ,  REICHARDT ALFRED

    IPC: D06N3/06 ,  D06N7/00

    Abstract: 869,434. Coated bituminized felt paper. BADISCHE ANILIN- & SODA-FABRIK A.G. Aug. 20, 1959 [Sept. 26, 1958], No. 28456/59. Class 140. A floor covering comprises a bituminized felt paper coated with a sealing composition containing an aqueous dispersion of a copolymer obtained by polymerizing a mixture of monomers of which each 100 parts by weight contains 20 to 90 parts by weight of vinylidene chloride, a maximum of 80 parts by weight of an acrylic acid ester and/or carboxylic acid vinyl ester, and a maximum of 40 parts by weight of vinyl chloride. The copolymer may be obtained by polymerizing 60 to 90 parts by weight vinylidene chloride and 10 to 40 parts by weight acrylic acid ester, carboxylic acid vinyl ester and/or vinyl chloride. Again, the copolymer may be obtained by polymerizing 60 parts by weight of vinylidene chloride and vinyl chloride i.e. a mixture containing at least 20 parts vinylidene chloride and up to 40 parts vinyl chloride, and 40 parts by weight of acrylic acid ester and/or carboxylic acid vinyl ester. Acrylic acid esters of aliphatic alcohols having 1 to 8 carbon atoms are especially suitable. Suitable carboxylic acid vinyl esters are vinyl acetate and vinyl propionate.

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