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US 4,057,522 AGranted
Liquid adhesive composition
AssigneeKiyoji Naruse
InventorsKiyoji Naruse, Tadashi Ito
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AssigneeKiyoji Naruse
InventorsKiyoji Naruse, Tadashi Ito
Estimating the term…
A liquid adhesive composition, which is an aqueous emulsion of an atactic polypropylene, is provided. The aqueous emulsion is prepared by kneading a mixture of (a) a substantially atactic polypropylene of approximately 3,000 to 30,000 average molecular weight, (b) 0.03 to 0.5 part by weight, based on 1 part by weight of said polypropylene, of a polyvinyl alcohol with a saponification degree of at least 70% and (c) approximately 0.05 to 2.0 parts by weight of water based on 1 part by weight of the polyvinyl alcohol, and then, dispersing the kneaded mixture in water. The aqueous emulsion may further contain asphalt in an amount of 0.5 to 2.0 parts by weight based on 1 part by weight of the polypropylene. The aqueous emulsion is of improved stability, and the dried film obtained therefrom exhibits good adhesion and water resistance.
A liquid adhesive composition in the form of an aqueous emulsion, which is prepared by kneading a mixture of (a) a substantially atactic polypropylene having an average molecular weight of approximately 3,000 to approximately 30,000, (b) 0.03 to 0.5 part by weight, based on 1 part by weight of said polypropylene, of a polyvinyl alcohol having a saponification degree of at least 70% and (c) approximately 0.05 to 2.0 parts by weight of water based on 1 part by weight of the polyvinyl alcohol, and then, dispersing the kneaded mixture in water.
Dependencies are inferred from the claim text.