Blowing agents based on urea dicarboxylic acid anhydride
US4190710A · kind A · utility
3Cited by
1References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1978 |
| Grant date | Feb 26, 1980 |
| Priority date | — |
| Expiry date | Mar 22, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/91
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Blowing agents comprising urea dicarboxylic acid anhydride do not give rise to discoloring decomposition residues nor form acid or alkaline by-products. These blowing agents may be used for expanding thermoplastic resins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.