Dic Corporation

Miwa Ueguchi

Hiroki Tanaka

Tomohiro Tetsui

Norie Fujishita

A task to be achieved by the invention is to provide a foamed sheet having excellent retention of foam, hand feeling, and peel strength. The present invention provides a foamed sheet which is formed from a water dispersion of a urethane resin (X), wherein the water dispersion has a urethane resin (X) content of 50 to 80% by mass, and the water dispersion contains no organic solvent. Further, the present invention provides a synthetic leather having at least a substrate (i) and a polyurethane layer (ii), wherein the polyurethane layer (ii) is formed from the above-mentioned foamed sheet. The foamed sheet preferably has a density of 200 to 1,000 kg/m.

Foam sheet and synthetic leather

To provide an aqueous resin composition including: an anionic polyurethane (A) having an aromatic ring; an acrylonitrile butadiene rubber (B); an aqueous medium (C); a vulcanizing agent (D); and a vulcanizing accelerator (E). The anionic polyurethane (A) is preferably a product of reaction of polyoxytetramethylene glycol, a carboxyl group-containing glycol, ethylene glycol, and diphenylmethane diisocyanate, or a product of reaction of polyoxytetramethylene glycol, a carboxyl group-containing glycol, butanediol, and diphenylmethane diisocyanate. An object of the invention is to provide a mixture of aqueous polyurethane and NBR having excellent storage stability, even in a case where the vulcanizing agent and the vulcanizing accelerator are added.

Growing community of inventors

Osaka, Japan

Miwa Ueguchi