US4435559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
β-Hydroxy urethane low temperature curing agents
Assignee: PPG Industries Ohio Inc
•
Filing: 1982-08-18
•
Granted: 1984-03-06
•
Expires: 2002-08-18
Abstract
Abstract A curable composition, comprising a beta-hydroxy urethane which is particularly useful as a crosslinking agent which affords relatively low temperature cure, is provided.
Inventors
- 👤 Joseph T. Valko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:50
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4488; C09D5/4496; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0809; C08G18/0814; C08G18/28; C08G18/40; C08G18/58; C08G18/584; C08G18/64; C08G18/6415; C08G18/643; C08G18/70; C08G18/72; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8009; C08K; C08K5/00; C08K5/0008; C08K5/0025; C08L; C08L63/00; C09D5/4419; C09D5/443; C09D5/4453
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
18 words
A curable composition comprising: (i) an active hydrogen-containing material, (ii) a beta-hydroxy urethane, and (iii) a cure catalyst.
Claim 2
Dependent Claim
18 words
A curable composition comprising: (i) an active hydrogen-containing material, (ii) a beta-hydroxy urethane, and (iii) a cure catalyst.
Claim 3
Dependent Claim
24 words
The composition of claim 1, in which the active hydrogen-containing material is an epoxy group-containing polymer or is derived from an epoxy group-containing polymer.
Claim 4
Dependent Claim
23 words
The composition of claim 2, in which the active hydrogen-containing material is a reaction product of an epoxy group-containing polymer and an amine.
Claim 5
Dependent Claim
53 words
The composition of claim 1, wherein the beta-hydroxy urethane is a reaction product of: (a) an isocyanato compound or polymer, and (b) a blocking agent which is a 1,2-polyol; wherein the equivalent ratio of --NCO groups of the isocyanato compound or polymer to --OH groups of the 1,2-polyol is about 1:1.5 to 1:2.
Claim 6
Dependent Claim
15 words
A composition of claim 4, wherein the isocyanato compound or polymer is an aromatic isocyanate.
Claim 7
Dependent Claim
19 words
The composition of claim 4, wherein the 1,2-polyol is ethylene glycol, propylene glycol, 1,2-butanediol or hydrolyzed butyl glycidyl ether.
Claim 8
Dependent Claim
14 words
The composition of claim 6, wherein the 1,2-polyol is a hydrolyzed n-butyl glycidyl ether.
Claim 9
Dependent Claim
24 words
The composition of claim 4, wherein the blocking agent comprises a combination of a 1,2-polyol and a conventional blocking agent which is a monoalcohol.
Claim 10
Dependent Claim
19 words
The composition of claim 1, wherein the cure catalyst is a metal salt or complex comprising tin or lead.
Claim 11
Dependent Claim
13 words
The composition of claim 1, which is an aqueous dispersion containing cationic groups.
Claim 12
Dependent Claim
19 words
The composition of claim 10, in which the cationic groups comprise amine salt groups or quaternary ammonium base groups.
References Cited (Backward Citations)
US3679564A
Cited
US3823118A
Cited
US3883483A
Cited
US3922253A
Cited
USRE30264E
Cited
US4134866A
Cited
US4252703A
Cited
USRE31022E
Cited
US4310646A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |