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CRUSHED FOAM-BACKED FABRICS AND FOAMS FOR PRODUCING THE SAME
申请号	GB5517574	申请日	1974-12-20	公开(公告)号	GB1463874A	公开(公告)日	1977-02-09
申请人	TANNER CO CHAS S;			发明人
摘要	1463874 Ethylene-vinyl ester copolymer dispersion foams CHAS S TANNER CO 20 Dec 1974 [16 Jan 1974] 55175/74 Headings C3C and C3P [Also in Division B2] Foams of aqueous dispersions comprising an emulsion copolymer of 15 to 40 weight per cent ethylene units, 1À5 to 9 weight per cent crosslinking monomer units and the balance vinyl ester copolymer units, the copolymer having a molecular weight of at least 300,000, and the emulsion having air whipped therein in an amount increasing the volume of the emulsion 5- to 10-fold may be used in the production of crushed foam backed fabrics. The cross-linking monomer may be an N-methylol compound such as N-methylol acrylamide or N-methylol allyl carbamate, optionally with crosslinking potential introduced after copolymerization by partial hydrolysis if vinyl acetate units. Co-crosslinking monomers, e.g. acids, acrylamide, methacrylamide, allyl alcohol or hydroxyethyl acrylate or methacrylate may also be present. The emulsions may be foamed by whipping with air, applied to fabrics and the resulting coatings dried, crushed and baked to effect crosslinking. They may also contain thickeners, surfactants, pigments and aminoplast resins. Examples describe foamed emulsion copolymers of ethylene, vinyl acetate, acrylamide and (1) N-methylol acrylamide or (2) N-methylol allyl carbamate.
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