Patent EP0349192A2 successfully refreshed from Google Patents.
EP0349192A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Liquid, epoxy resin composition
Assignee: Somar Corp
•
Filing: 1989-06-22
•
Granted: —
•
Expires: 2009-06-22
Abstract
Abstract A liquid, epoxy resin composition suitable for use in fixation of a stator coil or a rotor coil is disclosed, which comprises (A) a mixture containing (a₁) a Bisphenol A epoxy resin and (a₂) an alicyclic epoxy resin; and (B) a curing agent including (b₁) an acid anhydride, and (b₂) a phenol compound of the general formula: wherein R¹ and R² represent independently from each other a lower alkyl, R³ represents a lower alkylene and n is an integer of 1-5, the amount of the phenol compound (b₂) being in the range of 2-8 % based on the weight of the mixture (A).
Inventors
- 👤 Ichiro Akutagawa
- 👤 Tsutomu Yamaguchi
- 👤 Toshihiro Hanamori
- 👤 Kunimitsu Matsuzaki
- 👤 Shinobu Okamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 18:32
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/686; C08G59/20; C08G59/22; C08G59/226; C08G59/40; C08G59/42; C08G59/4215
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
82 words
A liquid, epoxy resin composition comprising: (A) a mixture containing (a₁) a Bisphenol A epoxy resin, and (a₂) an alicyclic epoxy resin; and (B) a curing agent including (b₁) an acid anhydride, and (b₂) a phenol compound of the general formula: wherein R¹ and R² represent independently from each other a lower alkyl, R³ represents a lower alkylene and n is an integer of 1-5, the amount of said phenol compound being 2-8 % based on the weight of the mixture (A).
Claim 2
Dependent Claim
82 words
A liquid, epoxy resin composition comprising: (A) a mixture containing (a₁) a Bisphenol A epoxy resin, and (a₂) an alicyclic epoxy resin; and (B) a curing agent including (b₁) an acid anhydride, and (b₂) a phenol compound of the general formula: wherein R¹ and R² represent independently from each other a lower alkyl, R³ represents a lower alkylene and n is an integer of 1-5, the amount of said phenol compound being 2-8 % based on the weight of the mixture (A).
Claim 3
Dependent Claim
19 words
A composition as claimed in claim 1, wherein the Bisphenol A epoxy resin has an epoxy equivalent of 170-270.
Claim 4
Dependent Claim
30 words
A composition as claimed in claim 1, wherein the alicyclc epoxy resin is a compound selected from the group consisting of 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexane-carboxylate, vinylcyclohexylene dioxide, bis (3,4-epoxycyclohexylmethyl) adipate or 6-(3,4-epoxycyclohexyl)-1,5-meta-dioxane-3-spiro-3′,4′-epoxycylohexane.
Claim 5
Dependent Claim
26 words
A composition as claimed in claim 1, wherein the weight ratio of the Bisphenol A epoxy resin to the alicyclic epoxy resin is 3:7 to 9:1.
Claim 6
Dependent Claim
29 words
A composition as claimed in claim 1, wherein the acid anhydride is a compound selected from the group consisting of methyltetrahydrophthalic anhydride, methylhexahydrophthalic anhydride, methylnadic anhydride and methylbutenyltetrahydrophthalic anhydride.
Claim 7
Dependent Claim
33 words
A composition as claimed in claim 1, wherein R¹ and R² stand independently from each other methyl, ethyl or propyl, R³ stands for methylene or ethylene and n is an integer of 2-4.
Claim 8
Dependent Claim
15 words
A composition as claimed in claim 1, wherein the phenol compound is 2,4,6-tri(N,N-dimethyl)aminomethylphenol or 2-(N,N-dimethyl)aminomethylphenol.
Claim 9
Dependent Claim
30 words
A composition as claimed in claim 1, wherein the acid anhydride is used in an amount of 0.5-1.5 mole per one equivalent of the epoxy group of the mixture (A).
Claim 10
Dependent Claim
27 words
A composition as claimed in claim 1, wherein the phenol compound is used in an amount of 2.5-5 % based on the weight of the mixture (A).
Claim 11
Dependent Claim
33 words
A composition as claimed in claim 1, further comprising a diluent selected from the group consisting of 1,6-hexanediol diglycidyl ether, polyalkyleneglycol diglycidyl ether, trimethylolpropane triglycidyl ether, butyl glycidyl ether and phenyl glycidyl ether.
Claim 12
Dependent Claim
28 words
A composition as claimed in claim 10, wherein the diluent is used in an amount not more than 20 % based on the weight of the mixture (A).
Claim 13
Dependent Claim
21 words
A composition as claimed in claim 1 and exhibiting a gellation time at 150 °C of not longer than 120 seconds.
Claim 14
Dependent Claim
31 words
A composition as claimed in claim 1, and being a two-component type composition consisting of said mixture (A) as a first component and said curing agent (B) as a second component.
Claim 15
Dependent Claim
56 words
A method of fixing windings of a coil with a composition according to claim 1, comprising the steps of: heating the windings to a temperature of 100-180 °C, dropping the composition onto the heated windings to impregnate the windings with the composition; and heating the impregnated windings at 100-180 °C to permit the composition to cure.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.