US4540823A
Expired / Lapsed
US
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Tetrahydrocarbyl phosphonium salts
Assignee: Dow Chemical Co
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Filing: 1984-06-15
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Granted: 1985-09-10
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Expires: 2004-06-15
Abstract
Abstract Novel advanced epoxy resins are prepared using phosphine or phosphonium salt initiators bearing at least one hydroxyphenyl or thiophenyl groups. These phosphonium salt initiators are novel compositions of matter. The resulting resins contain reduced quantities of extractable phosphorus containing moieties.
Inventors
- 👤 George A. Doorakian
- 👤 Joseph W. Hanafin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:26
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/688; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/54; C07F9/5442; C07F9/5456; C08G59/02; C08G59/14; C08G59/1433; C08G59/1438; C08G59/1455
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
41 words
A compound corresponding to the formula ##STR35## wherein R and R 2 are each independently phenyl or hydroxyphenyl R 1 is a C 1 to C 4 alkyl and X.sup.⊖ is fluoride, bromide, chloride, iodide, carboxylate, bicarbonate, biphosphate, phenate or bisphenate.
Claim 2
Dependent Claim
41 words
A compound corresponding to the formula ##STR35## wherein R and R 2 are each independently phenyl or hydroxyphenyl R 1 is a C 1 to C 4 alkyl and X.sup.⊖ is fluoride, bromide, chloride, iodide, carboxylate, bicarbonate, biphosphate, phenate or bisphenate.
Claim 3
Dependent Claim
54 words
A compound corresponding to the formula ##STR36## wherein R and R 2 are each phenyl or hydroxyphenyl R 1 is phenyl or C 1 to C 4 alkyl A is a trivalent alkane radical having from one to 12 carbon atoms and X.sup.⊖ is fluoride, bromide, chloride, iodide, carboxylate, bicarbonate, biphosphate, phenate or bisphenate.
Claim 4
Dependent Claim
54 words
A compound corresponding to the formula ##STR36## wherein R and R 2 are each phenyl or hydroxyphenyl R 1 is phenyl or C 1 to C 4 alkyl A is a trivalent alkane radical having from one to 12 carbon atoms and X.sup.⊖ is fluoride, bromide, chloride, iodide, carboxylate, bicarbonate, biphosphate, phenate or bisphenate.
Claim 5
Dependent Claim
16 words
A compound corresponding to the formula ##STR37## wherein m is an integer from 1 to 3.
Claim 6
Dependent Claim
16 words
A compound corresponding to the formula ##STR37## wherein m is an integer from 1 to 3.
Claim 7
Dependent Claim
15 words
The compound as described in claim 3 wherein m is the integer 1 or 2.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-09 | 1989-03-11 | 1989-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-09 | 1993-03-11 | 1993-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-09 | 1997-03-11 | 1997-09-10 | $7700.00 | Window Closed / Lapsed |