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    Composite thermoplastic adhesives
    75.
    发明授权
    Composite thermoplastic adhesives 失效
    复合热塑性粘合剂

    公开(公告)号：US3317368A

    公开(公告)日：1967-05-02

    申请号：US33200963

    申请日：1963-12-20

    申请人： UNITED SHOE MACHINERY CORP

    发明人： BATTERSBY WILLIAM R

    IPC分类号： B29B13/02 ,  C09J5/00 ,  C09J131/04 ,  C09J163/00 ,  D01D5/08

    CPC分类号： D01D5/08 ,  B29B13/022 ,  C08L2666/02 ,  C09J5/00 ,  C09J9/005 ,  C09J131/04 ,  C09J163/00 ,  Y10T428/2929

    摘要： A heat fusible rod which is substantially uniform in cross-section along its length, which is flexible enough to be coiled on a reel and unwound therefrom, and which is sufficiently stiff to be pushed endwise into a passageway of an apparatus adapted to melt the rod and apply it to a workpiece in which passageway the rod fits snugly, comprises an outer sheath of a first material, which is stable and comprises a heat fusible synthetic polymer, which sheath surrounds a core of a second material which is also heat fusible, the two materials being such that when the rod is melted and the two molten materials mixed together, a molten adhesive composition is provided which may be applied to a workpiece. Said first material may be, for example, polyethylene or a polyamide (such as that obtained by reacting polymerized soy bean oil fatty acid with ethylenediamine); the polyethylene may be combined with an ethylene/ethyl acrylate copolymer or a hydrocarbon resin, e.g. a beta-pinene resin. Said second material may be (a) a vinyl acetate homopolymer or copolymer, e.g. a vinyl acetate/ethylene copolymer; this may be optionally admixed with, for example, a soft tacky thermoplastic saturated hydrocarbon resin or a styrene polymer, (b) a mixture of a beta-pinene polymer, an isobutylene polymer (e.g. an isobutylene-isoprene copolymer), a polyamide and an epoxide resin, and (c) a gum rosin comprising abietic acid. The second material may also include a plasticizer, e.g. dibutyl phthalate, for the first material.