Patent US3945964A successfully refreshed from Google Patents.
US3945964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous epoxy emulsions
Assignee: Individual
•
Filing: 1974-05-10
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Granted: 1976-03-23
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Expires: 1994-05-10
Abstract
Abstract Stable aqueous emulsions of epoxy resins containing as an emulsifying agent between 2 and 10% by weight relative to the weight of the epoxy resin of ethylene oxidepropylene oxide block polymers having the formulae R--O--CH(CH.sub.3 CH--O ].sub.X [CH.sub.2 CH.sub.2 --O ].sub.Y H and R--O--CH.sub.2 CH.sub.2 (CH.sub.3)--O ].sub.X [CH.sub.2 CH.sub.2 --O ] Y H in which X is an integer of at least 8 and at most 22, Y is an integer from at least 25 and at most 40, and R is a radical of the group consisting of alkenyl, aralkyl, cycloalkyl, aralkenyl and cycloalkenyl radicals.
Inventors
- 👤 Garth Winton Hastings
- 👤 Wade Arthur Wyatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:09
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; C08J9/283; C08G; C08G59/00; C08G59/18; C08G59/40; C08J3/00; C08J3/02; C08J3/03; C08J3/05; C08L; C08L63/00; C08J2363/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
A stable aqueous emulsion of an epoxy resin, said emulsion containing, as an emulsifying agent, between 2 and 10% by weight relative to the weight of the epoxy resin, of an ethylene oxide-propylene oxide block copolymer having the formulae: R--O--CH(CH.sub.3)CH--O].sub.X [CH.sub.2 CH.sub.2 --O].sub.Y H and R--O--CH.sub.2 CH.sub.2 (CH.sub.3)--O].sub.X [CH.sub.2 CH.sub.2 --O].sub.Y H in which formulae X is an integer of at least 8 and at most 22, Y is an integer of at least 25 and at most 40, and R is a radical selected from the group consisting of alkenyl, aralkyl, cycloalkyl, aralkenyl and cycloalkenyl radicals.
Claim 2
Dependent Claim
97 words
A stable aqueous emulsion of an epoxy resin, said emulsion containing, as an emulsifying agent, between 2 and 10% by weight relative to the weight of the epoxy resin, of an ethylene oxide-propylene oxide block copolymer having the formulae: R--O--CH(CH.sub.3)CH--O].sub.X [CH.sub.2 CH.sub.2 --O].sub.Y H and R--O--CH.sub.2 CH.sub.2 (CH.sub.3)--O].sub.X [CH.sub.2 CH.sub.2 --O].sub.Y H in which formulae X is an integer of at least 8 and at most 22, Y is an integer of at least 25 and at most 40, and R is a radical selected from the group consisting of alkenyl, aralkyl, cycloalkyl, aralkenyl and cycloalkenyl radicals.
Claim 3
Dependent Claim
27 words
A stable aqueous emulsion as claimed in claim 1 in which R is an alkylphenyl radical having from 3 to 18 carbon atoms in the alkyl group.
Claim 4
Dependent Claim
20 words
A stable aqueous emulsion as claimed in claim 2 in which R is an octyl phenyl, nonylphenyl or decylphenyl radical.
Claim 5
Dependent Claim
24 words
A stable aqueous emulsion as claimed in claim 1 in which the emulsion also contains a curing agent or hardener for the epoxy resin.
Claim 6
Dependent Claim
34 words
A stable aqueous emulsion as claimed in claim 4 in which the epoxy resin emulsion is blended with an emulsion of a thermoplastic polymer, the curing agent being dispersed in the thermoplastic polymer emulsion.
Claim 7
Dependent Claim
29 words
A stable aqueous emulsion as claimed in claim 1 in which the emulsion contains a reinforcing material selected from the group comprising glass fibres, carbon fibres and ceramic fibres.
References Cited (Backward Citations)
US2811495A
Cited
US2872428A
Cited
US2933409A
Cited
US3049449A
Cited
US3168488A
Cited
US3316195A
Cited
US3376245A
Cited
US3335105A
Cited
US3497556A
Cited
US3634305A
Cited
US3669911A
Cited
US3661267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |