US4672102A
Expired / Lapsed
US
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Polyhydroxy ethers containing spirobiindanols
Assignee: Dow Chemical Co
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Filing: 1985-12-23
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Granted: 1987-06-09
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Expires: 2005-12-23
Abstract
Abstract Polyhydroxy ethers containing spirobiinadanols are tough, soluble thermoplastics with high heat distortion temperatures relative to bisphenol A based materials. These materials could function as surface coating resins.
Inventors
- 👤 H. Craig Silvis
- 👤 Ted A. Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:50
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/621; C08G59/20; C08G59/22; C08G59/24; C08G59/245; C09; C09D; C09D163/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
16 words
A polyhydroxy ether comprising the reaction product of a spirobiindanol and diglycidyl ether of a biphenol.
Claim 2
Dependent Claim
16 words
A polyhydroxy ether comprising the reaction product of a spirobiindanol and diglycidyl ether of a biphenol.
Claim 3
Dependent Claim
86 words
Polyhydroxy ethers as defined in claim 1 wherein the spirobiindanol has the general formula ##STR17## the diglycidyl ether is selected from the group consisting of ##STR18## and the polyhydroxy ether's general repeating unit is selected from the group consisting of ##STR19## wherein R is selected from the group consisting of hydrogen, hydrocarbon radicals, halogen radicals, and mixtures thereof, X is a linear hydrocarbon radical with a 1 to 4 carbon chain length, A is a hydrocarbon radical, and n has a value of 0 to 1.
Claim 4
Dependent Claim
19 words
The polyhydroxy ethers as defined in claim 2 and the spirobiindanol is selected from the group consisting of ##STR20##
Claim 5
Dependent Claim
20 words
The polyhydroxy ethers as defined in claim 2 wherein the repeating unit is selected from the group consisting of ##STR21##
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) | 1990-06-08 | 1990-12-08 | 1991-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-08 | 1994-12-08 | 1995-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-08 | 1998-12-08 | 1999-06-09 | $7700.00 | Window Closed / Lapsed |