The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 20, 1992
Filed:
Feb. 11, 1991
Takeo Nishimura, Okayama, JP;
Kuraray Co., Ltd., Kurashiki, JP;
Abstract
A leather-like sheet material resembling natural leather is provided which has a microporous surface and comprises a fibrous substrate layer (1) and a porous, skinless surface layer (2) having an apparent density of 0.25-0.48 g/cm.sup.3 with pores having an average diameter of 15-300 .mu.m being predominantly present therein. The surface layer (2) comprises polyurethane I in which the organic diisocyanate constituent is an aromatic ring-containing organic diisocyanate and the porous structure of at least the surface portion of the surface layer (2) is provided with polyurethane II prepared from an organic diisocyanate, which mainly comprises an aliphatic diisocyanate and/or an alicyclic diisocyanate, a polymer diol and a chain extender. The surface portion of the surface layer of the leather-like sheet material may be provided with a polyurethane coat layer which mainly comprises a fine particle polyurethane, or a coat layer made of a composition composed of a polyurethane, which mainly comprises a fine particle polyurethane and a polyoxyethylene- or glycerol-modified hardened oil.