Rim polyurethane compositions containing internal mold release agents
US4847307A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1988 |
| Grant date | Jul 11, 1989 |
| Priority date | — |
| Expiry date | Aug 8, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2125/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention is directed to a process for the production of optionally cellular, polyurethane elastomer moldings or optionally cellular, rigid structural polyurethanes by reacting a reaction mixture containing PA0 (i) a polyisocyanate, PA0 (ii) a high molecular weight polymer having at least two hydroxy groups and having a molecular weight of 400 to about 10,000, PA0 (iii) about 5 to 50% by weight, based on the weight of component (ii) of a chain-extender having at least two hydroxy groups and PA0 (iv) about 0.05 to 10 weight percent, based on the weight of components (ii) and (iii) of a salt based on a carboxy functional siloxane and an amidine group-containing compound of the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are straight or branched, saturated or unsaturated hydrocarbon chains having up to 30 carbon atoms which may optionally be substituted by ether groups, ester groups, amide groups or amidine groups and may also optionally be terminated by isocyanate-reactive groups such as hydroxyl or amino groups, R.sub.4 corresponds to the definition of R.sub.1, R.sub.2 and R.sub.3, but may additionally represent an aromatic substituent having 6 to 15 carbon ato…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.