US5561174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid epoxy resin composition
Assignee: Murata Manufacturing Co Ltd
•
Filing: 1995-09-29
•
Granted: 1996-10-01
•
Expires: 2015-09-29
Abstract
Abstract Disclosed is a liquid epoxy resin composition comprising (A) a liquid epoxy resin, (B) a dimethylpolysiloxane having epoxy groups at its both ends, and (C) a dispersing agent comprising the reaction product of (C-1) a dimethylpolysiloxane having amino groups or carboxyl groups reactive with epoxy resins at its side chains or both ends and having phenyl groups or polyether groups for improving its compatibility with epoxy resins at its side chains, and (C-2) an epoxy resin having the same structure as the component (A). The composition has a reduced internal stress, while maintaining the heat resistance intrinsic to epoxy resins, and has excellent resistance, crack resistance and heat shock resistance.
Inventors
- 👤 Yoshinori Saito
- 👤 Masaaki Hirayama
- 👤 Shunjiro Imagawa, deceased
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:28
CPC Classifications
H; H10; H10W; H10W74/00; H10W74/40; H10W74/47; H10W74/476; C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/30; C08G59/306; C08L; C08L63/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
88 words
A liquid epoxy resin composition comprising (A) a liquid epoxy resin, (B) a dimethylpolysiloxane having epoxy groups at its both ends, and (C) a dispersing agent comprising the reaction product of the following components (C-1) and (C-2): (C-1) a dimethylpolysiloxane having amino groups or carboxyl groups reactive with epoxy resins at its side chains or both ends and having phenyl groups or polyether groups for improving its compatibility with epoxy resins at its side chains, and (C-2) an epoxy resin, having the same structure as the component (A).
Claim 2
Dependent Claim
88 words
A liquid epoxy resin composition comprising (A) a liquid epoxy resin, (B) a dimethylpolysiloxane having epoxy groups at its both ends, and (C) a dispersing agent comprising the reaction product of the following components (C-1) and (C-2): (C-1) a dimethylpolysiloxane having amino groups or carboxyl groups reactive with epoxy resins at its side chains or both ends and having phenyl groups or polyether groups for improving its compatibility with epoxy resins at its side chains, and (C-2) an epoxy resin, having the same structure as the component (A).
Claim 3
Dependent Claim
57 words
The liquid epoxy resin composition as claimed in claim 1, wherein the content of the component (B) is from 5 to 60 parts by weight and that of the component (C-1) is from 1 to 15 parts by weight, each relative to 100 parts by weight of the sum of the component (A) and the component (C-2).
Claim 4
Dependent Claim
26 words
The liquid epoxy resin composition as claimed in claim 2, wherein the functional equivalent of component (C-1) reactive with epoxy resins is from 500 to 5000.
Claim 5
Dependent Claim
23 words
The liquid epoxy resin composition as claimed in claim 3, wherein the epoxy equivalent of the component (B) is from 500 to 5000.
Claim 6
Dependent Claim
26 words
The liquid epoxy resin composition as claimed in claim 1, wherein the functional equivalent of component (C-1) reactive with epoxy resins is from 500 to 5000.
Claim 7
Dependent Claim
23 words
The liquid epoxy resin composition as claimed in claim 5, wherein the epoxy equivalent of the component (B) is from 500 to 5000.
Claim 8
Dependent Claim
23 words
The liquid epoxy resin composition as claimed in claim 1, wherein the epoxy equivalent of the component (B) is from 500 to 5000.
Claim 9
Dependent Claim
6 words
The cured composition of claim 1.
Claim 10
Dependent Claim
6 words
The cured composition of claim 2.
Claim 11
Dependent Claim
6 words
The cured composition of claim 3.
Claim 12
Dependent Claim
6 words
The cured composition of claim 6.
Claim 13
Dependent Claim
25 words
In a high-voltage electronic part containing an epoxy resin sealant or adhesive therein, utilizing the cured composition of claim 8 as said sealant or adhesive.
Claim 14
Dependent Claim
25 words
In a high-voltage electronic part containing an epoxy resin sealant or adhesive therein, utilizing the cured composition of claim 9 as said sealant or adhesive.
Claim 15
Dependent Claim
25 words
In a high-voltage electronic part containing an epoxy resin sealant or adhesive therein, utilizing the cured composition of claim 10 as said sealant or adhesive.
Claim 16
Dependent Claim
26 words
In a high voltage electronic part containing an epoxy resin sealant or adhesive therein, utilizing the cured composition of claim 11 as said sealant or adhesive.
References Cited (Backward Citations)
US3843577A
Cited
US3926885A
Cited
US4707529A
Cited
US4877822A
Cited
US4624998A
Cited
US4859722A
Cited
US5043211A
Cited
JPS6481848A
Cited
JPH01268721A
Cited
US5173544A
Cited
US5102960A
Cited
US5279860A
Cited
US5364923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-10-01 | 2000-04-01 | 2000-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-10-01 | 2004-04-01 | 2004-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-10-01 | 2008-04-01 | 2008-10-01 | $7700.00 | Window Closed / Lapsed |