Patent US4839427A successfully refreshed from Google Patents.
US4839427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin systems cured with blocked acid catalysts
Assignee: Monsanto Co
•
Filing: 1987-09-03
•
Granted: 1989-06-13
•
Expires: 2007-09-03
Abstract
Abstract Resin systems cured with blocked acid catalysts formed by reaction of sulfonic acids with glycidamides. The blocked acids are used as catalysts and provide viscosity stability and pot life without significant decrease in catalytic activity in comparison with the corresponding free sulfonic acids.
Inventors
- 👤 Patrick J. Mormile
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:44
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/44; C08K; C08K5/00; C08K5/36; C08K5/41; C08K5/42
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
31 words
An acid curing resin system comprising an amino resin, a resin containing hydroxy, carboxy, primary amide or secondary amide groups and a sulfonic acid catalyst blocked by reaction with a glycidamide.
Claim 2
Dependent Claim
31 words
An acid curing resin system comprising an amino resin, a resin containing hydroxy, carboxy, primary amide or secondary amide groups and a sulfonic acid catalyst blocked by reaction with a glycidamide.
Claim 3
Dependent Claim
25 words
The acid curing resin system of claim 1 wherein the blocked sulfonic acid comprises at least one unit per molecule represented by the formula: ##STR3##
Claim 4
Dependent Claim
22 words
The acid curing resin system of claim 1 wherein the sulfonic acid comprises from 1 to 4 sulfonic acid groups per molecule.
Claim 5
Dependent Claim
17 words
The acid curing resin system of claim 1 wherein the sulfonic acid is an aromatic sulfonic acid.
Claim 6
Dependent Claim
51 words
The acid curing resin system of claim 4 wherein the sulfonic acid is selected from the group consisting of benzenesulfonic acid, alkylbenzenesulfonic acid, benzene disulfonic acid, alkylbenzene disulfonic acid, naphthalene sulfonic acid, alkylnaphthalenesulfonic acid, naphthalene disulfonic acid, and alkylnaphthalene disulfonic acid in which alkyl is C 1 to C 18 .
Claim 7
Dependent Claim
31 words
The acid curing resin system of claim 1 wherein the glycidamide is selected from the group consisting of glycidamide and N-substituted glycidamides comprising from 1 to 4 glycidamido groups per molecule.
Claim 8
Dependent Claim
17 words
The acid curing resin system of claim 1 wherein the glycidamide is a glycidamidomethyl substituted amino resin.
Claim 9
Dependent Claim
29 words
The acid curing resin system of claim 1 wherein the resin containing hydroxy, carboxy, primary amide or secondary amide groups is an alkyd, a polyester or an acrylic resin.
Claim 10
Dependent Claim
34 words
The acid curing resin system of claim 8 wherein the amino resin is an alkylated condensation product of formaldehyde and an amino compound selected from urea, N, N'-ethyleneurea, dicyandiamide, glycouril, melamine, acetoguanamine and benzoguanamine.
Claim 11
Dependent Claim
17 words
The acid curing resin system of claim 9 wherein the sulfonic acid is an aromatic sulfonic acid.
Claim 12
Dependent Claim
51 words
The acid curing resin system of claim 10 wherein the sulfonic acid is selected from the group consisting of benzenesulfonic acid, alkylbenzenesulfonic acid, benzene disulfonic acid, alkylbenzene disulfonic acid, naphthalene sulfonic acid, alkylnaphthalenesulfonic acid, napthalene disulfonic acid, and alkylnaphthalene disulfonic acid in which alkyl is C 1 to C 18 .
Claim 13
Dependent Claim
31 words
The acid curing resin system of claim 11 wherein the glycidamide is selected from the group consisting of glycidamide and N-substituted glycidamides comprising from 1 to 4 glycidamido groups per molecule.
Claim 14
Dependent Claim
17 words
The acid curing resin system of claim 11 wherein the glycidamide is a glycidamidomethyl substituted amino resin.
Claim 15
Dependent Claim
44 words
The acid curing resin system of claim 13 wherein the alkyd, polyester of acrylic resin is a hydroxy resin of number average molecular weight in the range of 500 to 20000 and contains 1 hydroxy group per 150 to 10000 units of molecular weight.
References Cited (Backward Citations)
US4192826A
Cited
US4200729A
Cited
US4291137A
Cited
US4482698A
Cited
US4699949A
Cited
US4582894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |