Method for producing a thermosetting polyurethane from a thermoplastic polyurethane and thermoset polyurethane obtainable using said method
US6861491B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2001 |
| Grant date | Mar 1, 2005 |
| Priority date | — |
| Expiry date | Jan 30, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/837
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for producing thermosetting polyurethane after transformation from thermoplastic polyurethane with a hydrolyzable organo-silane which is grafted onto macromolecules of said thermoplastic polyurethane by means of a bonding agent. Said organo-silane has general formula (I), wherein R1,R2,R3=aliphatic alkyl, aromatic alkyl; n>1; R4 is an organic radical which can react with said bonding agent which comprises at least two isocyanate functions and the thermoplastic polyurethane obtained can, after transformation, become automatically cross-linked by coming into contact with water molecules in order to become thermosetting. The invention also relates to a product which can be obtained according to the inventive method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.