US4507441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accelerators for the cure of epoxy resins
Assignee: Scott Bader Co Ltd
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Filing: 1984-05-09
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Granted: 1985-03-26
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Expires: 2004-05-09
Abstract
Abstract A compound containing an epoxy group, is reacted with a carboxyl compound by heating a mixture of these compounds in the presence of a benzotriazole such as unsubstituted benzotriazole or tolyltriazole as accelerator. The accelerator is particularly effective in the reaction of a carboxyl compound which is a polyester containing free carboxylic acid groups with an epoxy compound which is triglycidyl cyanurate or an epoxy resin based on bisphenol A.
Inventors
- 👤 John O. Goring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:09
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4246; C08G59/4269; C08G59/4276; C08G59/68; C08G59/686; Y; Y10; Y10S; Y10S525/00; Y10S525/934
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
52 words
A method of reacting a compound containing an epoxy group with a carboxylic acid compound which comprises heating a mixture of the compound containing an epoxy group and the carboxylic acid compound in the presence of an accelerator characterized in that the accelerator is a benzotriazole optionally substituted in the aromatic ring.
Claim 2
Independent Claim
52 words
A method of reacting a compound containing an epoxy group with a carboxylic acid compound which comprises heating a mixture of the compound containing an epoxy group and the carboxylic acid compound in the presence of an accelerator characterized in that the accelerator is a benzotriazole optionally substituted in the aromatic ring.
Claim 3
Dependent Claim
22 words
A method according to claim 1, wherein the benzotriazole has the formula ##STR3## where R is absent or is C 1-4 alkyl.
Claim 4
Dependent Claim
14 words
A method according to claim 2, wherein the benzotriazole is unsubstituted benzotriazole or tolyltriazole.
Claim 5
Dependent Claim
18 words
A method according to claim 1, wherein the carboxylic acid compound is a polyester containing free carboxyl groups.
Claim 6
Dependent Claim
17 words
A method according to claim 4, wherein the compound containing an epoxy group is an epoxy resin.
Claim 7
Dependent Claim
15 words
A method according to claim 5, wherein the epoxy resin is based on bisphenol A.
Claim 8
Dependent Claim
16 words
A method according to claim 4, wherein the compound containing an epoxy group is triglycidyl isocyanurate.
Claim 9
Dependent Claim
43 words
A method according to claim 4, wherein the polyester includes glycol units derived from neopentyl glycol and acid units derived from one or more of terephthalic and isophthalic acids, the acid residues optionally additionally including units derived from another, mono- or di,-carboxylic acid.
Claim 10
Independent Claim
55 words
A method of reacting a compound containing an epoxy group with a carboxylic acid compound which comprises heating a mixture of the compound containing an epoxy group and the carboxylic acid compound in the presence of an accelerator, the improvement consisting of the use, as accelerator, of a benzotriazole optionally substituted in the aromatic ring.
Claim 11
Independent Claim
55 words
A method of reacting a compound containing an epoxy group with a carboxylic acid compound which comprises heating a mixture of the compound containing an epoxy group and the carboxylic acid compound in the presence of an accelerator, the improvement consisting of the use, as accelerator, of a benzotriazole optionally substituted in the aromatic ring.
Claim 12
Dependent Claim
29 words
A method according to claim 9, wherein the compound containing an epoxy group is an epoxy resin and the carboxylic acid compound is a polyester containing free carboxyl groups.
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) | 1988-03-25 | 1988-09-24 | 1989-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-25 | 1992-09-24 | 1993-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-25 | 1996-09-24 | 1997-03-26 | $7700.00 | Window Closed / Lapsed |