One-component-type composition for polyurethane elastomer and method for processing the same by molding
US5548057A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 29, 1994 |
| Grant date | Aug 20, 1996 |
| Priority date | — |
| Expiry date | Aug 29, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/798
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A one-component-type composition for a polyurethane elastomer, comprising as a main component a polyurethane precursor containing a polyisocyanate component, and a compound having active hydrogen groups. The polyisocyanate component contains a polyisocyanate having at least a urethodione group (particularly urethodione and isocyanurate groups), and the compound (polyol or the like) having active hydrogen groups contains at least two active hydrogen groups in its molecule and has a molecular weight of 18 to 20000. The polyurethane precursor is obtained by reacting the polyisocyanate component and the compound having active hydrogen groups under the condition that the equivalent ratio of the active hydrogen group in the compound having active hydrogen groups to the isocyanate group in the polyisocyanate component exceeds 1.0. The equivalent ratio of the urethodione group to the active hydrogen group in the polyurethane precursor is from 0.25 to 1.0. The one-component-type composition for a polyurethane elastomer has storage stability comparable to that of thermoplastic elastomers, can be handled with ease, and does not pollute working environment. The composition is useful for prepar…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.