Acrylated polyurethanes based on polyoxytetramethylene glycol chain extended with substituted diacids
US4782129A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1988 |
| Grant date | Nov 1, 1988 |
| Priority date | — |
| Expiry date | Jan 4, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2938
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An ultraviolet-curable coating composition adapted for the buffer coating of optical glass fiber consists essentially of an acrylate-capped polyurethane in admixture with at least about 25% of its weight of liquid monoethylenically unsaturated monomer having a low glass transition temperature below about 0.degree. C. The acrylate-capped polyurethane is based on a generally linear polyurethane which is the reaction product of organic diisocyanate with a stoichiometric deficiency of a modified diol, this modified diol being the diester reaction product of polyoxytetramethylene glycol having a molecular weight of from about 200 to about 2000 with a stoichiometric deficiency of a long chain ester-forming hydrocarbon-substituted dicarboxylic acid or ester-forming substitution product thereof. This provides a higher molecular weight polyoxytetramethylene glycol which includes ester groups and a long chain hydrocarbon substituent to improve microbending resistance while taking advantage of the better water resistance provided by the polyoxytetramethylene glycol component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.