Curable solid polyester resins
US3959209A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 11, 1973 |
| Grant date | May 25, 1976 |
| Priority date | — |
| Expiry date | Apr 11, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/935
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Solid curable polyester resin compositions comprising a filler or fibrous reinforcements impregnated with a solid solution of a crystalline polyester and crosslinking agent therefor are prepared by: PA1 A. mixing a liquid crosslinking agent with a solid crystalline polyester which is insoluble in said crosslinking agent at room temperature; PA1 B. heating the mixture of said solid crystalline polyester and liquid crosslinking agent to a temperature at which said polyester dissolves in said crosslinking agent and a temperature which is below that at which the polyester and crosslinking agent cure; PA1 C. forming a solid solution of said polyester and crosslinking agent by cooling the heated mixture thereof; and PA1 D. mixing with the polyester and crosslinking agent prior to the formation of said solid solution one or more of a filler, fibrous reinforcements or amorphous polyester.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.