Coating fibrous substrates
US3968312A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1973 |
| Grant date | Jul 6, 1976 |
| Priority date | — |
| Expiry date | Aug 30, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31533
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Leather is coated on at least one face with a curable composition comprising PA1 I. a polymercaptan containing at least two mercaptan groups per average molecule, PA1 Ii. a polyene having, per average molecule, at least two ethylenic double bonds, each .beta. to an atom of nitrogen, sulfur, or oxygen, the sum of the mercaptan groups in the polymercaptan and of such ethylenic double bonds in the polyene being more than 4, and the composition is then cured on the leather with or without the application of heat, optionally in the presence of a Bronsted acid, a Bronsted base, or a source of free radicals, as a curing accelerator. In this manner the leather is provided with a wearing or decorative surface having high gloss and smoothness, enhanced ease of cleaning, and decreased permeability to liquids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.