US4748230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of resin from phenolic and oxazoline using phosphine catalyst
Assignee: Ashland LLC
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Filing: 1987-03-27
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Granted: 1988-05-31
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Expires: 2007-03-27
Abstract
Abstract A process for the copolymerization of bis-2-oxazolines and polyphenolic compounds at greatly improved rates comprising carrying out the copolymerization in the presence of from about 0.5 to about 5% by weight of a phosphine catalyst is described.
Inventors
- 👤 Omar Tiba
- 👤 Billy M. Culbertson
- 👤 Marvin L. Deviney
- 👤 Anil B. Goel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:36
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/40
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
107 words
The process for the preparation of a polymeric composition comprising copolymerizing a mixture of a polyoxazoline and a polyphenolic compound in the presence of from about 0.5 to 5% by weight of a phosphine catalyst having the formula R 3 P wherein R independently represents an alkyl group having from 1 to 30 carbon atoms or an aryl group having from 6 to 14 carbon atoms or said R groups are independently substituted with at least one member selected from the group consisting of halogen, cyano, nitro, ester, hydroxyl, and phenolic groups at a temperature in the range of from about 140° C. to about 230° C.
Claim 2
Dependent Claim
107 words
The process for the preparation of a polymeric composition comprising copolymerizing a mixture of a polyoxazoline and a polyphenolic compound in the presence of from about 0.5 to 5% by weight of a phosphine catalyst having the formula R 3 P wherein R independently represents an alkyl group having from 1 to 30 carbon atoms or an aryl group having from 6 to 14 carbon atoms or said R groups are independently substituted with at least one member selected from the group consisting of halogen, cyano, nitro, ester, hydroxyl, and phenolic groups at a temperature in the range of from about 140° C. to about 230° C.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the polyoxazoline is a compound having at least two 2-oxazoline groups per molecule.
Claim 4
Dependent Claim
20 words
The process of claim 2 wherein the polyphenolic compound is one having two or more aromatic hydroxyl groups per molecule.
Claim 5
Dependent Claim
11 words
The process of claim 3 wherein the polyoxazoline is 1,3-phenylene bisoxazoline.
Claim 6
Dependent Claim
13 words
The process of claim 4 wherein the polyphenolic compound is a phenol-formaldehyde resin.
Claim 7
Dependent Claim
13 words
The process of claim 5 wherein the phosphine catalyst is tri(p-chloro phenyl) phosphine.
Claim 8
Dependent Claim
12 words
The process of claim 5 wherein the phosphine catalyst is triphenyl phosphine.
Claim 9
Dependent Claim
11 words
The process of claim 5 wherein the phosphine is tri-n-butyl phosphine.
References Cited (Backward Citations)
US4613662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |