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    33.
    发明专利
    未知

    公开(公告)号：NO127011B

    公开(公告)日：1973-04-24

    申请号：NO17066867

    申请日：1967-11-23

    Applicant: HOECHST AG

    Inventor： OBERST HERMANN ,  EBIGT JOACHIM ,  DUVE GUENTHER ,  SCHOMMER ALFRED

    IPC: C09J131/04 ,  C09J133/08 ,  C08F37/14 ,  F16F15/02 ,  B32B15/08

    Abstract: 1,207,159. Vibration damping laminates. FARBWERKE HOECHST A.G. 27 Nov., 1967 [25 Nov., 1966], No. 53825/67. Heading B5N. [Also in Division C3] A vibration damping laminated system comprises two plates, e.g. of steel, bonded by an interlayer comprising a copolymer containing from 30 to 40 parts by weight of units derived from vinyl acetate, from 30 to 40 parts by weight of units derived from 2-ethylhexyl acrylate, from 10 to 30 parts by weight of units derived from di-n-butyl maleate and from 5 to 15 parts by weight of units derived from crotonic acid, the total number of parts by weight of the various units being 100. The copolymer may be partially cross-linked, e.g. with agents such as epoxides or isocyanates, and may contain a minor amount of a filler, e.g. heavy spar, silicic acid, graphite and/or soot. The copolymer, in the molten state, can be applied to the plates by trowelling, brushing or pouring.

    35.
    发明专利
    未知

    公开(公告)号：DK122184B

    公开(公告)日：1972-01-31

    申请号：DK593368

    申请日：1968-12-04

    Applicant: HOECHST AG

    Inventor： SCHOMMER ALFRED ,  EBIGT JOACHIM ,  DUVE GUENTHER ,  OBERST HERMANN

    IPC: C08F255/02 ,  C08K9/10 ,  E04B1/98 ,  F16F1/36 ,  C08F41/00 ,  B32B15/08 ,  C08J1/40

    Abstract: 1,254,116. Vibration damping laminated systems. FARBWERKE HOECHST A.G. 3 Dec., 1968 [5 Dec.; 1967], No. 57349/68. Heading B5N. [Also in Divisions B2 and C3] A vibration damping laminated system comprises two plates, e.g. of metal such as steel, bonded together with an interlayer comprising a graft polymer of 55-90% by weight of styrene or a mixture of styrene and 0À1-10% by weight, based on the weight of the styrene, of a copolymerizable carboxylic acid, e.g. acrylic and/or methacrylic acid, on 45-10% by weight of a copolymer of 30-50% by weight of vinyl acetate and 50-70% by weight of ethylene. If the graft polymer contains a copolymerizable carboxylic acid it may be cross-linked with a compound containing a plurality of epoxide or isocyanate groups. The graft polymer may contain minor amounts of fillers, e.g. heavy spar, silicic acid, graphite, soot or a mixture thereof, and one or more plasticizers. The total thickness of the laminated system may be 1-6 mm. the thickness of the interlayer being 0À1-1 mm. and the ratio of the thicknesses of the plates being from 1:1 to 4:1. The graft polymer may be applied to the plates by trowelling, brushing or pouring at elevated temperature and the system cooled under pressure between rollers. A solution of the copolymer in styrene or styrene and acrylic and/or methacrylic acid mixture containing a polymerization initiator, e.g. tertiary butyl hydroperoxide, may be applied between the plates and the laminated system subjected to heating at 60-180‹ C. to effect grafting.

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