Copolymers and their production
    1.
    发明专利

    公开(公告)号:GB857261A

    公开(公告)日:1960-12-29

    申请号:GB3379059

    申请日:1959-10-06

    Applicant: BASF AG

    Abstract: Copolymers are produced by the polymerization of a mixture comprising (A) 5 to 75 parts of 5, 6-bismethylene-1, 2, 3, 4, 7, 7-hexachlorbicyclo-(2, 2, 1)-heptene-2 of formula: (B) 10-80 parts of styrene and/or styrene derivatives and (C) 0-70 parts of an unsaturated polyester of an alpha-olefinic dicarboxylic acid and a polyhydric alcohol, the total of A, B and C amounts to 100 parts. Specified styrene derivatives are alpha-methyl styrene, alpha-chlorstyrene alpha-bromostyrene, methyl styrene, dimethyl styrene, chlorostyrene, dichlorostyrene and dibromostyrene. Specified dicarboxylic acids are maleic, fumaric, itaconic, citraconic, aconitic, chlormaleic acids and anhydrides; these may be partially replaced by succinic, glutaric, adipic, pimelic, sebasic, suberic, alpha-methyl glutaric, oxadibutyric, sulphone-dibutyric, phthalic, endomethylene or hexachloroendo-methylene, tetrahydrophthalic acid, tetrachloro-phthalic, tetrabromophthalic and phenylene-butyric acid or anhydrides. Propylene glycol is the specified alcohol. Specified polymerization catalysts are benzoyl, lauroyl, ditertiary butyl, cyclohexanone, or methyl ethyl ketone, peroxides, perlauric acid, cumne hydroperoxide, tertiary butyl hydroperoxide azodi-isobutyro-dinitrile, hydrogen peroxide or potassium persulphate together with light. Redox systems using the above catalysts together with reducing agents, e.g. benzoin, sodium formaldehyde sulphoxylate, and sugar may be used. The polymerization may take place under bulk, solution or emulsion conditions. Stabilizers such as p-tertiary-butylcatechol, and hydroquinone, as well as cobalt octoate, cobalt naphthenate, dibutyl phthalate and polyvinylpyrrolidone may also be present.ALSO:5, 6-bismethylene-1, 2, 3, 4, 7, 7-hexachlorbicycle-(2, 2, 1)-heptene-(2) of the formula: is prepared by reacting 1, 4-dichlorbutene-2 with hexachlorcyclopentadiene by a Diels-Alder reaction to form 5, 6-bichlormethyl-1, 2, 3, 4, 7, 7-hexachlorbicyclo -(2, 2, 1)- heptane-2 and then splitting off hydrogen chloride using a sodium methylate.

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