Blowing agents based on urea dicarboxylic acid anhydride
US4104195A · kind A · utility
8Cited by
3References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1975 |
| Grant date | Aug 1, 1978 |
| Priority date | — |
| Expiry date | Sep 25, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/05
- 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.