Patent US1879655A successfully refreshed from Google Patents.
Patent US4074061A successfully refreshed from Google Patents.
US4074061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated polyester containing formal linkages
Assignee: Eastman Chemical Co
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Filing: 1976-10-26
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Granted: 1978-02-14
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Expires: 1996-10-26
Abstract
Abstract Disclosed is an unsaturated polyester containing formal linkages. The polyester is comprised of the following repeating unit ##STR1## wherein X is a positive integer from 2 to 10, R is the divalent radical remaining after removal of the terminal carboxyl group from an α,β-ethylenically unsaturated dicarboxylic acid, and R' is the divalent radical remaining after removal of the terminal hydroxyl groups from an aliphatic or cycloaliphatic glycol. The polyesters of this invention exhibit a combination of a desirable hardness and a desirable impact strength upon curing.
Inventors
- 👤 Harry R. Musser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:57
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/676; C08G4/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
A polyester having a molecular weight in the range of 1,000 to 3,000 comprised of the following structure ##STR7## X is a positive number from 2 to 10, n is a sufficient number of repeating units to achieve the required molecular weight, R is the divalent radical remaining after removal of the terminal carboxyl groups from an α,β-ethylenically unsaturated dicarboxylic acid, and R' is the divalent radical remaining after removal of the terminal hydroxyl groups from an aliphatic or cycloaliphatic glycol selected from the group consisting of 1,6-hexanediol, 1,7-heptanediol, 1,8-octanediol, 1,10-decanediol, 2,2,4-trimethyl-1,6-hexanediol, 1,4-cyclohexanediol, 1,2-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, 2,2,4,4-tetramethyl-1,3-cyclobutanediol.
Claim 2
Dependent Claim
97 words
A polyester having a molecular weight in the range of 1,000 to 3,000 comprised of the following structure ##STR7## X is a positive number from 2 to 10, n is a sufficient number of repeating units to achieve the required molecular weight, R is the divalent radical remaining after removal of the terminal carboxyl groups from an α,β-ethylenically unsaturated dicarboxylic acid, and R' is the divalent radical remaining after removal of the terminal hydroxyl groups from an aliphatic or cycloaliphatic glycol selected from the group consisting of 1,6-hexanediol, 1,7-heptanediol, 1,8-octanediol, 1,10-decanediol, 2,2,4-trimethyl-1,6-hexanediol, 1,4-cyclohexanediol, 1,2-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, 2,2,4,4-tetramethyl-1,3-cyclobutanediol.
Claim 3
Dependent Claim
17 words
The polyester of claim 1 wherein the α,β-ethylenically unsaturated dicarboxylic acid is furmaric acid or maleic acid.
Claim 4
Dependent Claim
10 words
The polyester of claim 1 wherein the glycol is 1,4-cyclohexanedimethanol.
Claim 5
Dependent Claim
15 words
The polyester of claim 1 wherein X is in the range of 2 to 3.
Claim 6
Dependent Claim
74 words
A polyester having a molecular weight in the range of 1,000 to 3,000 comprised of the following structure ##STR8## X is in the range of 2.05 to 2.5, n is a sufficient number of repeating units to achieve the required molecular weight, R is the divalent radical remaining after removal of the terminal carboxyl groups from fumaric acid, and R' is the divalent radical remaining after removal of the terminal hydroxyl groups from 1,4-cyclohexanedimethanol.
Claim 7
Dependent Claim
74 words
A polyester having a molecular weight in the range of 1,000 to 3,000 comprised of the following structure ##STR8## X is in the range of 2.05 to 2.5, n is a sufficient number of repeating units to achieve the required molecular weight, R is the divalent radical remaining after removal of the terminal carboxyl groups from fumaric acid, and R' is the divalent radical remaining after removal of the terminal hydroxyl groups from 1,4-cyclohexanedimethanol.
References Cited (Backward Citations)
US2366738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |