US4367318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy resin composition
Assignee: Asahi Kasei Corp
•
Filing: 1980-02-26
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Granted: 1983-01-04
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Expires: 2000-02-26
Abstract
Abstract An epoxy resin composition comprising (1) about 20 to about 80% by weight of a solid epoxy resin, and (2) about 80 to about 20% by weight of a solid resole-type phenolic resin having a softening point of about 70° to about 90° C., a gel time at 150° C. of at least about 80 seconds and a methylol index of about 25 to about 45, said phenolic resin being a condensation product of 1 mol of a phenol with 1 to about 4 mols of an aldehyde.
Inventors
- 👤 Hidekazu Ishimura
- 👤 Hiroshi Komoto
- 👤 Isao Kai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:27
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/04; C08L61/06; C08L63/00; Y; Y10; Y10S; Y10S525/00; Y10S525/934
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
87 words
A powder paint comprising (1) about 20 to about 80% by weight of a solid epoxy resin, and (2) about 80 to about 20% by weight of a solid resole-type phenolic resin having a softening point of about 70° to about 90° C., a gel time at 150° C. of at least about 80 seconds and a methylol index of about 25 to about 45, said phenolic resin being a condensation product of 1 mol of a phenol with 1 to about 4 mols of an aldehyde.
Claim 2
Dependent Claim
87 words
A powder paint comprising (1) about 20 to about 80% by weight of a solid epoxy resin, and (2) about 80 to about 20% by weight of a solid resole-type phenolic resin having a softening point of about 70° to about 90° C., a gel time at 150° C. of at least about 80 seconds and a methylol index of about 25 to about 45, said phenolic resin being a condensation product of 1 mol of a phenol with 1 to about 4 mols of an aldehyde.
Claim 3
Dependent Claim
19 words
The paint of claim 1, wherein the solid epoxy resin has a softening point of 65° to 140° C.
Claim 4
Dependent Claim
16 words
The paint of claim 1, wherein the solid epoxy resin is a bisphenol A-type epoxy resin.
Claim 5
Dependent Claim
18 words
The paint of claim 3, wherein the epoxy resin has a softening point of 65° to 140° C.
Claim 6
Dependent Claim
16 words
The paint of claim 1, wherein the solid resole-type phenolic resin is a phenol-formaldehyde resole resin.
Claim 7
Dependent Claim
16 words
The paint of claim 1, wherein the solid resole-type phenolic resin is a cresol-formaldehyde resole resin.
Claim 8
Dependent Claim
17 words
The paint of claim 1, wherein the solid resole-type phenolic resn is a bisphenol A-formaldehyde resole resin.
Claim 9
Dependent Claim
25 words
The paint of claims 5 or 6, wherein the solid resole-type phenolic resin is obtained by using ammonia solution as a basic catalyst for condensation.
Claim 10
Dependent Claim
28 words
The paint of claims 5 or 6, wherein the solid resole-type phenolic resin is obtained by using a primary or secondary amine as a basic catalyst for condensation.
Claim 11
Dependent Claim
28 words
The paint of claim 1, wherein said phenolic resin is a condensation product of 1 mol of a phenol with 1.2 mol to 2 mols of an aldehyde.
Claim 12
Dependent Claim
9 words
The paint of claim 1 substantially free of solvent.
Claim 13
Dependent Claim
21 words
The paint of claim 1 consisting essentially of said solid epoxy resin and said solid resole-type phenolic resin as a vehicle.
Claim 14
Dependent Claim
28 words
The paint of claim 1 obtained by uniformly melt-mixing said solid epoxy resin and said solid resole-type phenolic resin and then pulverizing the resulting product to powder form.
Claim 15
Dependent Claim
37 words
The paint of claim 1 consisting essentially of said solid epoxy resin, said solid resole-type phenolic resin and one or more members selected from the group consisting of extenders, flow controlling agents, reinforcing agents, fillers and pigments.
Claim 16
Dependent Claim
38 words
A process for producing a coated film which comprises coating a powder paint as set forth in claim 1 on a substrate without using a solvent and heating the thus coated powder paint to yield said coated film.
Claim 17
Dependent Claim
16 words
The paint of claim 1, wherein said gel time at 150° C. is about 100 seconds.
Claim 18
Dependent Claim
16 words
The paint of claim 1, wherein said gel time at 150° C. is about 150 seconds.
Claim 19
Dependent Claim
16 words
The paint of claim 1, wherein said gel time at 150° C. is about 500 seconds.
Claim 20
Dependent Claim
22 words
The paint of claim 1, wherein said phenol is a phenol substituted with an alkyl group having 1 to 6 carbon atoms.
Claim 21
Dependent Claim
29 words
The paint of claim 1, wherein said solid epoxy resin contains at least 2 epoxy groups per molecule and is solid at a temperature between 20° and 30° C.
Claim 22
Dependent Claim
40 words
The paint of claim 1, wherein said solid epoxy resin is contained in an amount of about 40 to 60% by weight and said solid resole-type phenolic resin is contained in an amount of about 60 to 40% by weight.
Claim 23
Dependent Claim
86 words
The paint of claim 1 obtained by melt-blending said solid epoxy resin and said solid resole-type phenolic resin, said phenolic resin being produced by reacting 1 mole of phenol with 1 to 4 moles of aldehyde, condensing the reaction product to a volatiles content of about 2 to about 15% by weight at 70° C. and subsequently maintaining the same at room temperature to about 50° C. for 10 to 60 seconds and then at about 50° to about 130° C. for 10 to 60 seconds.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-03 | 1986-07-05 | 1987-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-03 | 1990-07-05 | 1991-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-03 | 1994-07-05 | 1995-01-04 | $7700.00 | Window Closed / Lapsed |