Patent US4032593A successfully refreshed from Google Patents.
US4032593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable resin compositions
Assignee: Mitsubishi Chemical Corp
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Filing: 1975-07-11
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Granted: 1977-06-28
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Expires: 1995-07-11
Abstract
Abstract A curable resin composition which can give cured products of superior impact resistance, superior flexibility, thermal shock resistance, storage stability and adhesiveness, and which comprises A. either (1) a polyepoxide compound containing at least two 1,2-epoxy groups per molecule or (2) an unsaturated polyester having a molecular weight of 500 to 5,000. B. a specified aromatic copolyester having a weight average molecular weight of 10,000 to 100,000 and C. either (1) a curing agent for the polyepoxide compound (A-1) or (2) an ethylenic monomer copolymerizable with the unsaturated polyester (A-2).
Inventors
- 👤 Hiroshi Samejima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:31
CPC Classifications
C; C08; C08L; C08L63/00; C08L67/00; C08L67/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
142 words
A curable epoxy resin composition comprising (a) a polyepoxide compound containing at least two 1,2-epoxy groups per molecule, (b) 1 to 10% by weight, based on the polyepoxide compound (A) of an aromatic copolyester having a weight average molecular weight of 10,000 to 100,000 and composed of recurring units of formula (I) and recurring units of formula (II) ##STR20## wherein R is a residue resulting from the removal of carboxyl groups from an aromatic dicarboxylic acid; D is a residue resulting from the removal of hydroxyl groups from a glycol containing 2 to 15 carbon atoms; G is a residue resulting from the removal of the terminal hydroxyl group from a long-chain poly(alkylene oxide) glycol having a number average molecular weight of 350 to 6,000; and x/x+ y is from 0.2 to 0.8, (c) a curing agent for the polyepoxide compound (A).
Claim 2
Dependent Claim
142 words
A curable epoxy resin composition comprising (a) a polyepoxide compound containing at least two 1,2-epoxy groups per molecule, (b) 1 to 10% by weight, based on the polyepoxide compound (A) of an aromatic copolyester having a weight average molecular weight of 10,000 to 100,000 and composed of recurring units of formula (I) and recurring units of formula (II) ##STR20## wherein R is a residue resulting from the removal of carboxyl groups from an aromatic dicarboxylic acid; D is a residue resulting from the removal of hydroxyl groups from a glycol containing 2 to 15 carbon atoms; G is a residue resulting from the removal of the terminal hydroxyl group from a long-chain poly(alkylene oxide) glycol having a number average molecular weight of 350 to 6,000; and x/x+ y is from 0.2 to 0.8, (c) a curing agent for the polyepoxide compound (A).
Claim 3
Dependent Claim
63 words
The curable resin composition according to claim 1 wherein said polyepoxide compound is selected from the group consisting of (1-a) polyepoxy ethers containing at least two epoxy groups per molecule, (1-b) polyepoxy esters containing at least two epoxy groups per molecule, and (1-c) polyepoxide compounds containing at least two epoxy groups per molecule, prepared by epoxidizing compounds containing at least two unsaturated bonds.
Claim 4
Dependent Claim
73 words
The curable resin composition according to claim 1 wherein said curing agent (C) is selected from the group consisting of (2-a) polycarboxylic acids containing at least two carboxyl groups per molecule, (2-b) carboxylic acid anhydrides containing at least one carboxylic anhydride group per molecule, (2-c) polyamines containing at least one primary, secondary or tertiary amino group per molecule, (2-a) polythiols containing at least two thiol groups per molecule, and (2-e) a polyamide resin.
Claim 5
Dependent Claim
31 words
The resin composition according to claim 1 wherein D in formula (I) is a residue resulting from the removal of two hydroxyl groups from a glycol containing 2 to 8 carbons.
Claim 6
Dependent Claim
41 words
The resin composition according to claim 1 wherein G in formula (II) is a residue resulting from the removal of the two terminal hydroxyl groups from a long-chain poly(alkylene oxide) glycol having a number average molecular weight of 800 to 5,000.
Claim 7
Dependent Claim
37 words
The resin composition according to claim 1 claims 1 to 6 wherein at least 70 mole % of the total R groups contained in the entire recurring units of formula (I) and formula (II) are para-phenylene groups.
Claim 8
Dependent Claim
42 words
The resin composition according to claim 1 which further contains (D) a curing promotor selected from the group consisting of (3-a) secondary and tertiary aliphatic amines, (3-b) metal salts of organic acids, (3-c) metal halides, and (3-d) Lewis acids and complexes thereof.
Claim 9
Dependent Claim
32 words
The resin composition according to claim 1 wherein x and y in formulae (I) and (II) representing the recurring units of the copolyester (B) has the following relation x/x+ y= 0.35- 0.70.
Claim 10
Dependent Claim
15 words
The resin composition according to claim 1 which further contains a reactive or non-reactive diluent.
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) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |