Leather-like sheet materials and method of producing same
US5156900A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 11, 1991 |
| Grant date | Oct 20, 1992 |
| Priority date | — |
| Expiry date | Feb 11, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31554
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.