POLYBUTADIENE - EPOXY -ANHYDRIDE LAMINATING RESINS
Assignee
HUGHES AIRCRAFT COMPANY, A DE. CORP.
Filed
Oct 9, 1987
Granted
Jan 16, 1990
Location
PALOS VERDES PE CA US
Abstract
Improvement in the method for preparing resin compositions for use as a laminate material in printed wiring boards wherein the resin composition is formed by mixing an epoxy-anhydride prepolymer with maleated polybutadiene and a suitable solvent. The improvement involves preparing the epoxy-anhydride prepolymer using a two step procedure instead of a single step. The two step procedure prevents uncontrolled exothermic reactions from occurring during preparation of commercial quantities of the epoxy-anhydride prepolymer and increases the versatility of the process since different anhydrides can be used in each of the two steps.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Mar 11, 1988
Rescinded
Aug 15, 1989
Duration
1 year, 5 months
Inventor
- 1EPHRAIM H. CATSIFF
Record Details
- Patent number
- US 4894413
- Application
- 07107144
- Aerospace match
- No
- Dataset source
- 35 USC §181 SO records