Patent US4018744A successfully refreshed from Google Patents.
US4018744A
Expired / Lapsed
US
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Storage stable polyester-polyurethane-producing compositions
Assignee: Atlantic Richfield Co
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Filing: 1976-02-13
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Granted: 1977-04-19
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Expires: 1996-02-13
Abstract
Abstract A shelf-stable heat curable, polymer-producing composition is presented comprised of an organic polycarbamic acid ester, an organic polycarboxylic acid ester of a monohydric alcohol, an organic polyhydroxyl compound and an organotin condensation-rearrangement catalyst. The composition may be in the form of a liquid and it may be dissolved in a solvent or it may be in the form of a dry powder.
Inventors
- 👤 Larry G. Wolgemuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:04
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/08; C08G18/16; C08G18/22; C08G18/24; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/8064; C08G71/00; C08G71/04; C08G2150/00; C08G2150/20; Y; Y10; Y10S; Y10S528/00; Y10S528/902
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
166 words
A storage-stable composition which is thermally curable to high molecular weight polyester polyurethanes comprising a. an organic polycarbamic acid ester having the structural formula ##STR2## wherein n is 1 to 5, R is an organic radical containing 2 to about 50 carbon atoms and R' and R" are the same or different organic radicals containing up to 12 carbon atoms, b. an organic polycarboxylic acid ester having a molecular weight of about 118 to 462 the alcohol portion of which is a monoalcohol, c. an organic polyhydroxy compound having a molecular weight of about 64 to 2,000, and d. about 0.005 to 5.0%, based on the total weight of (a), (b) and (c) of a latent curing catalyst comprised of an organotin compound, said (a), (b) and (c) being free of substituents which interfere with the desired reaction, the equivalent ratio of (a) to (b) varying from 1:9 to 9:1 and the equivalent ratio of total (a) and (b) to (c) varying from 0.7 to 10:1.
Claim 2
Dependent Claim
166 words
A storage-stable composition which is thermally curable to high molecular weight polyester polyurethanes comprising a. an organic polycarbamic acid ester having the structural formula ##STR2## wherein n is 1 to 5, R is an organic radical containing 2 to about 50 carbon atoms and R' and R" are the same or different organic radicals containing up to 12 carbon atoms, b. an organic polycarboxylic acid ester having a molecular weight of about 118 to 462 the alcohol portion of which is a monoalcohol, c. an organic polyhydroxy compound having a molecular weight of about 64 to 2,000, and d. about 0.005 to 5.0%, based on the total weight of (a), (b) and (c) of a latent curing catalyst comprised of an organotin compound, said (a), (b) and (c) being free of substituents which interfere with the desired reaction, the equivalent ratio of (a) to (b) varying from 1:9 to 9:1 and the equivalent ratio of total (a) and (b) to (c) varying from 0.7 to 10:1.
Claim 3
Dependent Claim
9 words
The composition of claim 1 in dry powdered form.
References Cited (Backward Citations)
US2801231A
Cited
US3291763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-18 | 1980-10-18 | 1981-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-18 | 1984-10-18 | 1985-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-18 | 1988-10-18 | 1989-04-19 | $7700.00 | Window Closed / Lapsed |