Patent US3975322A successfully refreshed from Google Patents.
US3975322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rapid drying epoxy resin ester
Assignee: Westinghouse Electric Corp
•
Filing: 1974-09-30
•
Granted: 1976-08-17
•
Expires: 1994-09-30
Abstract
Abstract A diglycidyl ether of a diphenol, such as a diglycidyl ether of bisphenol A, is reacted with bisphenol S to form a chain-extended epoxy resin. This chain-extended epoxy resin is then esterified with a fatty acid derived from a drying oil, such as linseed oil fatty acid. The resulting epoxy resin ester is cut with a solvent for use as a rapid drying coating material. A primer using this material is also disclosed.
Inventors
- 👤 H. Alan Reinshagen
- 👤 Leonard E. Edelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:09
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/04; C08G59/06; C08G59/066; C08G59/14; C08G59/1433; C08G59/1438; C08G59/1455; C08G59/1461; C08G59/1472
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
104 words
A rapid drying epoxy resin ester comprising: the reaction product of A. about 25 to about 50% (based on total solids) of a drying oil-derived fatty acid; and B. chain-extended epoxy resin consisting of the reaction product of 1. diglycidyl ether of a diphenol; and 2. bisphenol S, where the percentage of diglycidyl ether of a diphenol in said chain-extended epoxy resin is X and the percentage of bisphenol S in said chain-extended epoxy resin is 100-X, where ##EQU2## and E R is between about 600 and about 2000 and E D is the epoxy equivalent weight of said diglycidyl ether of a diphenol.
Claim 2
Dependent Claim
104 words
A rapid drying epoxy resin ester comprising: the reaction product of A. about 25 to about 50% (based on total solids) of a drying oil-derived fatty acid; and B. chain-extended epoxy resin consisting of the reaction product of 1. diglycidyl ether of a diphenol; and 2. bisphenol S, where the percentage of diglycidyl ether of a diphenol in said chain-extended epoxy resin is X and the percentage of bisphenol S in said chain-extended epoxy resin is 100-X, where ##EQU2## and E R is between about 600 and about 2000 and E D is the epoxy equivalent weight of said diglycidyl ether of a diphenol.
Claim 3
Dependent Claim
17 words
An epoxy resin ester according to claim 1 wherein said fatty acid is derived from linseed oil.
Claim 4
Dependent Claim
22 words
An epoxy resin ester according to claim 1 wherein said diglycidyl ether of a diphenol is a diglycidyl ether of bisphenol A.
Claim 5
Dependent Claim
18 words
An epoxy resin ester according to claim 1 in a solution of about 40 to about 60% solids.
Claim 6
Dependent Claim
14 words
An epoxy resin ester according to claim 4 wherein said solution is in xylene.
Claim 7
Dependent Claim
31 words
An epoxy resin ester according to claim 4 hardened with about 15 to about 30% of a compound selected from the group consisting of butylated urea, butylated melamine, and mixtures thereof.
Claim 8
Dependent Claim
21 words
An epoxy resin ester according to claim 1 wherein at least about 95% of said bisphenol S is p,p'-dihydroxy diphenyl sulfone.
Claim 9
Dependent Claim
37 words
A primer comprising about 30 to about 50% of a pigment and about 50 to about 70% of a vehicle for said pigment, said vehicle comprising a solution of an epoxy resin ester according to claim 1.
Claim 10
Dependent Claim
60 words
A primer comprising: A. about 30 to about 50% of a pigment which comprises: 1. about 25 to about 35% of an opacity agent; 2. about 15 to about 25% of a corrosion inhibitor; and 3. about 45 to about 55% of a pigment extender; and B. about 50 to about 70% of a vehicle for said pigment which comprises:
Claim 11
Dependent Claim
60 words
A primer comprising: A. about 30 to about 50% of a pigment which comprises: 1. about 25 to about 35% of an opacity agent; 2. about 15 to about 25% of a corrosion inhibitor; and 3. about 45 to about 55% of a pigment extender; and B. about 50 to about 70% of a vehicle for said pigment which comprises:
Claim 12
Dependent Claim
35 words
about 35 to about 45% of an epoxy resin ester according to claim 1; 2. about 55 to about 65% of an aromatic solvent; and 3. about 1 to about 2% of a liquid dryer.
Claim 13
Dependent Claim
27 words
A prime according to claim 9 wherein said opacity agent is an iron oxide, said corrosion inhibitor is zinc chromate, and said pigment extender is magnesium silicate.
Claim 14
Dependent Claim
30 words
A primer according to claim 9 wherein said aromatic solvent is xylene and said liquid dryer is selected from the group consisting of cobalt naphthenate, lead naphthenate, and mixtures thereof.
Claim 15
Dependent Claim
39 words
An epoxy resin ester according to claim 1 wherein said diglycidyl ether of a diphenol has the general formula ##STR6## where n is an average of about 0 to about 1, and R is the residue of a diphenol.
References Cited (Backward Citations)
US3219602A
Cited
US3393171A
Cited
US3364178A
Cited
US3553119A
Cited
US3823107A
Cited
US3829395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |