POLYFUNCTIONAL ISOCYANATE CROSSLINKING AGENTS FOR PROPELLANT BINDERS
Assignee
Filed
Jun 27, 1984
Granted
Jun 2, 1987
Location
CUMBERLAND MD US
Abstract
A process for preparation of polyfunctional isocyanates having an NCO functionality of at least 4 is provided. The process is conducted at temperatures below 50 DEG C. Polyols having a hydroxyl functionality of at least 4 are reacted with diisocyanates to produce the polyfunctional isocyanates. The ratio of isocyanate groups to hydroxyl groups of the polyol must be at least 4/l. The new polyfunctional isocyanates are particularly useful as crosslinking agents for propellant compositions having a binder containing pendant hydroxyl groups.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Oct 16, 1984
Rescinded
Sep 8, 1986
Duration
1 year, 10 months
Inventor
- 1MINN-SHONG CHI
Record Details
- Patent number
- US 4670068
- Application
- 00662529
- Aerospace match
- No
- Dataset source
- 35 USC §181 SO records
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