Abstract: A structure is disclosed comprising a layer of polyurethane foam bonded to at least one layer of another material, especially a layer of fibreglass matte, a layer of cellulosic material e.g. cardboard, and/or a layer of polyurethane foam. The layers are bonded together with an adhesive of polyethylene or polypropylene that has been grafted with an ethylenically unsaturated dicarboxylic acid or anhydride thereof, the adhesive containing at least 0.03% by weight of said acid or anhydride. The structure exhibits a temperature for heat-fail resistance in shear of at least 90.degree. C. In embodiments, the polyurethane foam is a rigid polyurethane foam, and the polyethylene and polypropylene have been grafted with fumaric acid, maleic acid or maleic anhydride. As an example, the structure is comprised of a layer of fibreglass matte, at least one layer of polyurethane foam and a layer of fibreglass matte, the layers being bonded together with the adhesive.

Abstract: An adhesive composition formed by admixing under melt conditions (a) 50-95% by weight of a moisture cross-linkable silane-grafted polyolefin having a melt viscosity of less than 100 000 cps, and (b) 5-50% by weight of a polyolefin grafted with at least one ethylenically-unsaturated carboxylic acid or anhydride, and derivatives thereof. The grafted polyolefin has a melt viscosity of less than 100 000 cps, and contains a catalyst for moisture cross-linking of the silane-grafted polyolefin of (a). The adhesive may be used to bond a variety of substrates.

Abstract: Promoting adhesion (without need for an adhesive) of polyurethane to polyvinyl chloride sheet plasticized with ethylene/carbon monoxide polymer by adding an effective amount of a phenolic resin; particularly novolac resins.

Abstract: Polar thermoplastic polyolefin blends are provided which are flexible and are particularly useful in replacing polyvinyl chloride sheeting used as liners, folders, etc. The blends comprise, in general, a non-polar thermoplastic polyolefin, a functionalized polar ethylene copolymer, and a functionalized olefin polymer as a compatibilizing agent, all of which are chlorine-free.

Abstract: Highly flexible articles having wall thickness of at least 0.01 inches are made from chlorine-free direct ethylene copolymers containing small amounts of selected known slip additives. Articles in the form of tubes or tubing have particular utility for replacement of PVC based tubing used in medical applications.

Abstract: Polar thermoplastic polyolefin blends are provided which are flexible and are particularly useful in replacing polyvinyl chloride sheeting used as liners, folders, etc.. The blends comprise, in general, a non-polar thermoplastic polyolefin, a polar ethylene copolymer, an epoxy functionalized polar ethylene copolymer, and a carboxylic acid or anhydride functionalized olefin polymer, all of which are chlorine-free.

Abstract: This invention provides a flame-retardant thermoplastic composition comprising a blend of ethylene copolymers, polyethylene, metal hydroxides and optionally a coupling agent and a compatibilizing agent, which is mildly cross-linked during blending with a peroxide and a polyfunctional compound. The composition has superior flame retardancy and a good balance of mechanical properties and electrical insulating properties, and maintains melt processibility for use as a sheath or insulation for wires and cables.

Abstract: A pressure sensitive adhesive composition which can be applied by hot melt techniques to one surface and adhered to a second surface by contact at ambient temperature, to thereby bond the two surfaces together. The adhesive composition is made of certain ethylene/n-butyl acrylate copolymers together with tackifier and optionally, plasticizer.

Abstract: Ionomers derived from ethylene/methacrylic acid or ethylene/acrylic acid copolymers, containing high levels of acid neutralized with lithium, zinc and sodium are blended in defined amounts to form compositions with very high resilience. The compositions are highly suitable for use as golf ball covers.

Abstract: The block resistance of pellets of copolymers of ethylene with acrylic or methacrylic acid is improved by addition of very low levels of certain defined liquid additives or water-soluble solid additives. This results in improved rates of pellet production, and in easier subsequent handling.

Abstract: Adhesives suitable for preparing laminates of polyvinyl chloride or polyvinyl chloride copolymers with wood or metal are prepared from a three component polymer mixture of polyvinyl chloride or its copolymers itself, a direct ethylene copolymer and another direct ethylene copolymer containing units derived from a monomer containing glycidyl units. The adhesive is especially useful for preparing PVC/wood laminates which are subject to outdoor weathering.

Abstract: Copolymers of ethylene with such monomers as an alkyl acrylate and carbon monoxide or with vinyl acetate alone are blended with a thermoplastic block-polyester elastomer and a tackifier to produce thermally stable, hot-melt adhesive compositions which adhere well to polyvinyl chloride and which retain adhesivity at elevated temperatures. Fillers, plasticizers and compatible waxes may also be present in the composition.

Abstract: Moisture-curable melt-processible adhesives are obtained by reacting certain ethylene copolymers containing an n-alkyl acrylate and a carefully limited amount of a carboxylic acid with a stoichiometric amount of an epoxy-silane. A process of preparing the moisture-curable melt-processible adhesives in the absence of solvent is also available.

Abstract: Adhesives suitable for preparing laminates of polyvinyl chloride or polyvinyl chloride copolymers with wood or metal are prepared from a three component polymer mixture of polyvinyl chloride or its copolymers itself, a direct ethylene copolymer preferably containing units derived from carbon monoxide, and another direct ethylene copolymer containing units derived from a monomer containing glycidyl units. The adhesive is especially useful for preparing PVC/wood laminates which are subject to outdoor weathering.

Abstract: The invention provides compositions useful in the manufacture of one-, two- and three-piece golfballs comprising blends of a copolyetherester or copolyetheramide, an expoxy-containing compound, and an acid-containing ethylene copolymer ionomer.

Abstract: A method for the treatment of melt-grafted polypropylene to improve adhesive properties thereof is disclosed. Molten grafted polypropylene, formed by melt grafting polypropylene with an alpha,beta unsaturated carboxylic acid or anhydride, is treated in melt processing apparatus with a minor amount of an aqueous solution of an alkaline material e.g. an aqueous solution of sodium hydroxide. The thus treated grafted polypropylene is separated from the aqueous solution and recovered e.g. in the form of pellets. The melt-grafted polypropylene may be formed in the melt processing apparatus prior to treatment with the aqueous solution or polypropylene that has been grafted in a previous operation may be fed to the apparatus. The treated polymer may be used in adhesive formulations.

Abstract: Hot melt adhesive composition of ethylene copolymer grafted with lactam oligomer, characterized by improved melt flow characteristics.

Abstract: A coextrudable adhesive composition formed from a polymer component and a catalytic agent is disclosed. The polymer component is selected from grafted polymers formed by grafting polyolefins with an ethylenically unsaturated carboxylic acid or anhydride. The catalytic agent is a monoalkyl phosphate, alkylamine, heterocyclic compound or aminocarboxylic acid. The compositions show improved adhesion to polar substrates compared with the related compositions that do not contain the catalytic agent. The compositions may be used, for example, in the bonding of ethylene/vinyl alcohol polymers to polyolefins and polyamides.

Abstract: A concentrate comprising a copolymer and 65 to 300%, by weight of the copolymer, of a vinyl silane is disclosed. The vinyl silane is vinyl trimethoxysilane and/or vinyl triethoxysilane. The copolymer is a copolymer of ethylene with at least one comonomer selected from the group consisting of carbon monoxide, vinyl acetate, alkyl acrylates and alkyl methacrylates, in which the alkyl groups have 1-4 carbon atoms. The copolymer is in a particulate form and has a heat of crystallization of less than 70 J/g, and if said copolymer is ethylene/vinyl acetate copolymer, then the copolymer has a vinyl acetate content of at least 18% by weight. The concentrate is maintained in a moisture-free environment and is in solid form. The concentrates are used in the moisture cross-linking of alpha-olefin polymers and offer versatility in processes for such cross-linking.

Abstract: The subject invention provides a package for a heat seal sensitive polymer comprising a thermoplastic bag sealed at one end with a thermoplastic polymeric thread, both the thermoplastic bag material and the thermoplastic thread material having a melt temperature at or below the processing temperature of the heat seal sensitive polymer.