US4647648A
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Polyhydroxyethers from hydroxybiphenyls
Assignee: Dow Chemical Co
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Filing: 1985-08-26
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Granted: 1987-03-03
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Expires: 2005-08-26
Abstract
Abstract Polyhydroxyethers formed by reacting a diglycidyl ether of biphenol, such as diglycidyl ethers of bisphenol-A, and a dihydroxybiphenyl, such as dihydroxybiphenyl, tetramethyldihydroxybiphenyl, and tetrabromotetramethyldihydroxybiphenyl, exhibit high heat distortion temperatures. These compositions could find utility in extruded films, packaging and coatings.
Inventors
- 👤 H. Craig Silvis
- 👤 Jody R. Berman
- 👤 Jerry E. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:13
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/621; C08G59/20; C08G59/22; C08G59/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
70 words
A polyhydroxyether composition comprising a reaction product of a diglycidyl ether of a biphenol selected from the group consisting of ##STR23## wherein X is selected from the group consisting of the hydrogen, chlorine, and bromine radicals, and mixtures thereof, and ##STR24## and mixtures thereof, with a dihydroxybiphenyl, in which the repeating unit of the polyhydroxyether contains at least an oxyhydrocarbon connecting group and a hydrocarbon or halogen substituted phenylene radical.
Claim 2
Dependent Claim
70 words
A polyhydroxyether composition comprising a reaction product of a diglycidyl ether of a biphenol selected from the group consisting of ##STR23## wherein X is selected from the group consisting of the hydrogen, chlorine, and bromine radicals, and mixtures thereof, and ##STR24## and mixtures thereof, with a dihydroxybiphenyl, in which the repeating unit of the polyhydroxyether contains at least an oxyhydrocarbon connecting group and a hydrocarbon or halogen substituted phenylene radical.
Claim 3
Dependent Claim
41 words
The polyhydroxyether of claim 1 wherein the polyhydroxyether has the general repeating unit ##STR25## wherein R is selected from the group consisting of hydrogen, methyl radicals, halogen radicals selected from the group consisting of chlorine and bromine radicals, and mixtures thereof.
Claim 4
Dependent Claim
24 words
The polyhydroxyether of claim 1 wherein the dihydroxybiphenyl is selected from the group consisting of an unsubstituted dihydroxybiphenyl, tetramethyldihydroxybiphenyl, brominated tetramethyldihydroxybiphenyl, and mixtures thereof.
Claim 5
Dependent Claim
40 words
A composition as defined in claim 3 wherein the repeating unit of the polyhydroxyether is selected from the group consisting of ##STR26## wherein X is selected from the group consisting of the hydrogen, chlorine and bromine radicals, and mixtures thereof.
References Cited (Backward Citations)
US2945004A
Cited
US3177089A
Cited
US3379684A
Cited
US3275708A
Cited
US3787520A
Cited
US4383101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-02 | 1990-09-01 | 1991-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-02 | 1994-09-01 | 1995-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-02 | 1998-09-01 | 1999-03-03 | $7700.00 | Window Closed / Lapsed |