Process for the production of polyurethanes, polyurethanes containing terminal aromatic amino groups and their use
US4574147A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 15, 1985 |
| Grant date | Mar 4, 1986 |
| Priority date | — |
| Expiry date | Jan 15, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S528/905
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the production of a crosslinkable, predominately linear polyurethane containing terminal aromatic amino groups by reacting PA0 (A) an organic, substantially difunctional polyisocyanate, PA0 (B) a substantially difunctional polyhydroxyl compound having a molecular weight of 400 to about 6000 and/or PA0 (C) a substantially difunctional chain-extending agent having a molecular weight of 18 to about 399 and PA0 (D) a chain-terminating agent comprising a member from the group consisting of araliphatic diamines and aromatic diamines containing amino groups of different reactivity to NCO-groups, in PA0 (E) solvents which are substantially inert to the reactants, in a single-stage or multistage reaction, characterized in that component (A) is reacted with component (B) and/or (C) in an NCO:isocyanate-reactive group ratio of about 1.45:1 to 1.02:1 to form a polyurethane containing terminal NCO-groups, having a molecular weight of at least 10,000 and an NCO-content of 0.2 equivalents and 0.001 equivalents of NCO/1000 g of polyurethane, and said polyurethane is subsequently reacted with chain-terminating agent (D) in an NCO:NH.sub.2 -ratio of about 1:5 to 1:1.66 to form polyuret…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.