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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 20:26
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)
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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 |