| 摘要 |
1,153,300. Adhesive coatings. NATIONAL STARCH & CHEMICAL CORP. 13 May, 1966 [18 May, 1965], No. 21488/66. Heading B2K. [Also in Divisions B5 and C3] A solid substrate coated with a dried adhesive film exhibiting optimum water resistance, said film having been deposited from an aqueous adhesive composition and made by (a) preparing an aqueous emulsion of vinyl acetate polymer or copolymer and stabilising the emulsion so as to render it compatible with a B-stage phenolic resin, by polymerising an aqueous emulsion of vinyl acetate in the presence of hydrogen peroxide at a polymerisation temperature of at least 85‹C. and in the presence of, as emulsifying agent, polyvinyl alcohol or by polymerising at least 80% by weight of vinyl acetate with at least one polymerisable comonomer selected from α and #- unsaturated carboxylic acids, their alkyl esters, their hydroxy-alkyl o esters, their amides and N-alkanol derivatives of their amides and (b) mixing the stabilized emulsion with a B-stage phenolic resin dissolved in an organic solvent. In Examples wood, plastic and metal substrates are coated. |
