US4076767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable mixed polyester resin compositions
Assignee: Mitsubishi Chemical Corp
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Filing: 1976-06-22
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Granted: 1978-02-28
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Expires: 1996-06-22
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
2026-10-25 03:46
CPC Classifications
C; C08; C08L; C08L63/00; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/676; C08G81/00; C08G81/02; C08G81/024; C08G81/027; C08L67/00; C08L67/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
164 words
A curable unsaturated polyester resin composition which comprises A. an unsaturated polyester having a molecular weight of 500 to 5,000, B. 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) ##STR5## 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 ##EQU8## is from 0.2 to 0.8, and C. an ethylenic monomer polymerizable with the unsaturated polyester (A), the amount of the aromatic copolyester (B) being 1 to 35 parts by weight per 100 parts by weight in total of the unsaturated polyester (A) and the ethylenic monomer (C).
Claim 2
Dependent Claim
164 words
A curable unsaturated polyester resin composition which comprises A. an unsaturated polyester having a molecular weight of 500 to 5,000, B. 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) ##STR5## 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 ##EQU8## is from 0.2 to 0.8, and C. an ethylenic monomer polymerizable with the unsaturated polyester (A), the amount of the aromatic copolyester (B) being 1 to 35 parts by weight per 100 parts by weight in total of the unsaturated polyester (A) and the ethylenic monomer (C).
Claim 3
Dependent Claim
41 words
The unsaturated polyester resin composition according to claim 1 wherein the amount of said aromatic copolyester (B) is 2.5 to 10 parts by weight per 100 parts by weight in total of the unsaturated polyester (A) and the ethylenic monomer (C).
Claim 4
Dependent Claim
57 words
The unsaturated polyester resin composition according to claim 1, wherein the amount of the unsaturated polyester (A) is 80 to 30 parts by weight and the amount of the ethylenic monomer (C) is 20 to 70 parts by weight, the total amount of the unsturated polyester (A) and the ethylenic monomer (C) being 100 parts by weight.
Claim 5
Dependent Claim
45 words
The unsaturated polyester resin composition according to claim 1, wherein said ethylenic monomer is at least one compound selected from the group consisting of styrene, chlorostyrene, lower alkyl esters of acrylic acid, lower alkyl esters of methacrylic acid, vinyltoluene, divinylbenzene, diallyl phthalate and diallyl fumarate.
Claim 6
Dependent Claim
31 words
The unsaturated polyester resin composition according to claim 1, which further contains at least one curing agent (E) selected from the group consisting of organic peroxides, azo compounds and carbonyl compounds.
Claim 7
Dependent Claim
34 words
The unsaturated polyester resin composition according to claim 5, which contains a promotor (F) in addition to the unsaturated polyester (A), the aromatic copolyester (B), the ethylenic monomer (C) and the curing agent (E).
Claim 8
Dependent Claim
35 words
The unsaturated polyester resin composition according to claim 6 wherein said promotor is selected from the group consisting of metal salts of organic acids, metal complexes of α,β-keto compounds and tertiary aliphatic or aromatic amines.
Claim 9
Dependent Claim
32 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 carbon atoms.
Claim 10
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 11
Dependent Claim
32 words
The resin composition according to claim 1 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 12
Dependent Claim
29 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) have the following relation ##EQU9##
References Cited (Backward Citations)
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US3957906A
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US3723568A
Cited
US3723569A
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US3923927A
Cited
US3959209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |