| 摘要 |
<p>1325025 Laminates REICHHOLD-ALBERT-CHEMIE AG 3 Dec 1970 [8 Dec 1969 4 May 1970] 57440/70 Heading B5N A method of cementing solid materials at room temperature wherein a molten thermoplastic is applied as a fusion contact adhesive to at least one of the materials to be cemented, the thermoplastic is allowed to cool to room temperature and the materials are joined at room temperature by pressing the material coated with adhesive into contact with the material to be bonded thereto is characterized by the use as the thermoplastic of a copolymer derived from : (a) 1 to 20% by weight of a nitrile of anα,# ethylenically unsaturated mono- or di-carboxylic acid or a mixture of more than one such nitrile; (b) 1 to 20% by weight of an amide of anα,#- ethylenically unsaturated mono- or di-carboxylic acid or a mixture of more than one such amide; (c) 40 to 97% by weight of an ester of anα,#-ethylenically unsaturated mono- or dicarboxylic acid containing 4 to 12 carbon atoms in the alcohol residue, or a mixture of more than one such ester, and (d) 1 to 30% by weight of methyl methacrylate. In a preferred embodiment, a reaction product of the copolymer and formaldehyde and/or a formaldehyde releasing agent is used. Specified nitriles are acrylonitrile, methacrylonitrile, maleic dinitrile, fumanic dinitrile and a monenitrile of a monoester of maleic or fumaric acid. Specified amides are acrylamide, methacrylamide, fumaric acid diamide, maleic acid diamide and a monoamide of a monoester of maleic or fumaric acid. Specified esters are n-butyl acrylate, w-hexyl acrylate, 2-ethyl hexyl acrylate, n-decyl acrylate, n-dodecyl acrylate, n-butyl methacrylate, n-hexyl methacrylate, 2-ethyl hexyl methacrylate, ndecyl methacrylate and n-dodecyl acrylate. Specified formaldehyde-releasing agents are paraformaldehyde, hexamethylene tetramine, trioxane, formaldehyde solutions, aminoplasts and resols. The materials to be cemented may be plastics, leather, cardboard, paper, textiles, metals, glass or wood. The Specification describes the bonding of bituminous felt to metal and of a fabric to concrete.</p> |
