US3862064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moulding compositions containing unsaturated and saturated polyesters, cellulose ester and monomeric material
Assignee: FREEMAN CHEMICALS Ltd 5 CIVIC WAY ELLESMERE PORT SOUTH WIRRAL L65 4AH
•
Filing: 1973-09-28
•
Granted: 1975-01-21
•
Expires: 1993-09-28
Abstract
Abstract Thermosetting unsaturated polyester resin based sheet moulding compounds containing a saturated liquid polyester and a thermoplastic cellulose ester as the additives to control the shrinkage on moulding.
Inventors
- 👤 David Philip Fry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:33
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/06; Y; Y10; Y10S; Y10S525/00; Y10S525/935
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
18 words
A composition as claimed in claim 1 wherein the saturated liquid polyester is polypropylene adipate or polypropylenE sebacate.
Claim 2
Dependent Claim
20 words
A composition as claimed in claim 1 wherein the cellulose ester is an ester of acetic, propionic or butyric acid.
Claim 3
Dependent Claim
21 words
A composition as claimed in claim 1 wherein the cellulose ester has all the ester groups derived from the same acid.
Claim 4
Dependent Claim
20 words
A composition as claimed in claim 1 wherein the cellulose ester has ester groups derived from more than one acid.
Claim 5
Dependent Claim
15 words
A composition according to claim 1 wherein the cellulose ester is a cellulose acetate butyrate.
Claim 6
Dependent Claim
33 words
A composition as claimed in claim 1 which contains 10 to 20 parts by weight of saturated liquid polyester for every 100 parts of the combined weight of unsaturated polyester and copolymerisable monomer.
Claim 7
Dependent Claim
34 words
A composition as claimed in claim 1 which contains from 10 to 20 parts by weight of the cellulose ester to every 100 parts of the combined weight of unsaturated polyester and copolymerisable monomer.
Claim 8
Dependent Claim
29 words
A sheet moulding compound comprising (1) an unsaturated polyester resin composition as claimed in claim 1, (2) a fibrous reinforcement, (3) a mineral filler and (4) a stiffening agent.
Claim 9
Dependent Claim
28 words
A sheet moulding compound as claimed in claim 9 in which the unsaturated polyester resin composition constitutes from 20 to 40% by weight of the sheet moulding compound.
References Cited (Backward Citations)
US2856378A
Cited
US3285995A
Cited
US3489707A
Cited
US3642672A
Cited
US3772241A
Cited
US3642683A
Cited
US3736278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |