Patent US4405765A successfully refreshed from Google Patents.
US4405765A
Expired / Lapsed
US
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Curable epoxy resins
Assignee: BASF SE
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Filing: 1982-08-30
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Granted: 1983-09-20
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Expires: 2002-08-30
Abstract
Abstract A curable resin is composed of A. an epoxy resin and B. a pyrylium salt as a catalyst, with or without C. a metal chelate or metal salt as a co-catalyst. Preferred pyrylium salts are those of the formula ##STR1## Preferred co-catalysts are acetylacetonates, stearates, benzoates, naphthenates, octoates or phthalates of Cu ++ , Co ++ , Co +++ , Fe +++ or Al +++ . The resin compositions may be used to produce coatings and moldings.
Inventors
- 👤 Kurt Demmler
- 👤 Wolfram Ochs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:11
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/70
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
115 words
A curable resin composition, containing A. a cationic polymerizable epoxy resin, and B. from 0.5 to 10% by weight of an onium salt as a hardening catalyst, wherein the catalyst is a pyrylium salt of the formula ##STR13## where R 1 and R 5 are identical and are each alkyl or alkaryl, each of 1 to 8 carbon atoms, R 2 , R 3 and R 4 are identical or different and are each hydrogen, or alkyl, alkaryl or cycloalkyl, each of not more than 8 carbon atoms, or an unsubstituted or alkyl-substituted phenyl, naphthyl, indenyl, indanyl or fluorenyl group or a heterocyclic substituent containing one or two heteroatoms, and X.sup.⊖ is a non-nucleophilic anion.
Claim 2
Dependent Claim
115 words
A curable resin composition, containing A. a cationic polymerizable epoxy resin, and B. from 0.5 to 10% by weight of an onium salt as a hardening catalyst, wherein the catalyst is a pyrylium salt of the formula ##STR13## where R 1 and R 5 are identical and are each alkyl or alkaryl, each of 1 to 8 carbon atoms, R 2 , R 3 and R 4 are identical or different and are each hydrogen, or alkyl, alkaryl or cycloalkyl, each of not more than 8 carbon atoms, or an unsubstituted or alkyl-substituted phenyl, naphthyl, indenyl, indanyl or fluorenyl group or a heterocyclic substituent containing one or two heteroatoms, and X.sup.⊖ is a non-nucleophilic anion.
Claim 3
Dependent Claim
111 words
A curable resin composition as claimed in claim 1, wherein the composition additionally contains from 0.01 to 10% by weight of metal chelate (C 1 ) of the formula ##STR14## where Me is a monovalent, divalent, trivalent or tetravalent metal, R 7 is hydrogen, or alkyl, cycloalkyl, aryl or alkaryl, each of not more than 8 carbon atoms, and R 6 and R 8 are identical or different and are each alkyl, cycloalkyl, aryl, aralkyl or alkaryl, each of not more than 8 carbon atoms, wherein R 6 and R 8 may furthermore be bonded to one another by a ring system, and n is an integer from 1 to 4.
Claim 4
Dependent Claim
42 words
A curable resin composition as claimed in claim 1, wherein the composition additionally contains from 0.01 to 10% by weight of a metal salt (C 2 ) of an aliphatic or aromatic mono- or polycarboxylic acid of 6 to 20 carbon atoms.
Claim 5
Dependent Claim
54 words
A curable resin composition as claimed in claim 1, wherein the catalyst is a pyrylium salt of the formula ##STR15## where R 3 has the meanings given in claim 1 and X.sup.⊖ is AsF 6 .sup.⊖, BF 4 .sup.⊖, SbF 6 .sup.⊖, PF 6 .sup.⊖, CF 3 SO 3 .sup.⊖ or ClO 4 .sup.⊖.
Claim 6
Dependent Claim
32 words
A curable resin composition as claimed in claim 2, wherein the metal chelate is an acetylacetonate of Cu ++ , Co ++ , Co +++ , Fe +++ or Al +++ .
Claim 7
Dependent Claim
37 words
A curable resin composition as claimed in claim 3, wherein the metal salt is a stearate, benzoate, naphthenate, octoate or phthalate of Cu ++ , Co ++ , Co +++ , Fe +++ or Al +++ .
Claim 8
Dependent Claim
52 words
A process for the production of a molding from the resin composition as claimed in claim 1, wherein an epoxy resin A is mixed thoroughly with the catalyst B, with or without a co-catalyst C 1 or C 2 , and the mixture is heated at from 80° C. to 160° C.
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) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |