US3705208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester resin and method of manufacturing the same
Assignee: Hitachi Ltd
•
Filing: 1969-11-28
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Granted: 1972-12-05
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Expires: 1989-11-28
Abstract
Abstract A polyester resin obtained by the polycondensation from a hydrogenated polydiene having two ester conjunction forming functions at the ends of a chain thereof and an organic compound having at least one function capable of forming ester conjunction with said forming function. The present disclosure is also directed to a method of manufacturing said polyester resins and polyesters compositions produced thereby.
Inventors
- 👤 Masaji Nakamuta
- 👤 Michio Tsukui
- 👤 Junji Mukai
- 👤 Toshikazu Narahara
- 👤 Sumio Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:21
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/52; Y; Y10; Y10S; Y10S525/00; Y10S525/94
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
67 words
A polyester resin which comprises the polycondensation product of a hydrogenated polydiene having a molecular weight of about 1,000 to about 4,000 and at least two ester-forming groups as end groups thereon and an organic compound containing from two to 18 carbon atoms and having functional groups capable of forming ester linkages with the ester-forming groups of the hydrogenated polydiene, said polyester resin having the general formula:
Claim 2
Dependent Claim
70 words
A polyester resinous composition which comprises a polyester resin comprising a polycondensation product of a hydrogenated polydiene having a molecular weight of about 1,000 to about 4,000 and two ester-forming groups as end groups thereon, and an organic compound containing from two to 18 carbon atoms and having functional groups capable of forming ester linkages with the ester-forming groups of the hydrogenated polydiene, said polyester resin having the general formula:
Claim 3
Independent Claim
102 words
A method for producing a polyester resin which comprises subjecting a hydrogenated polydiene having a molecular weight of about 1,000 to about 4,000 and two ester-forming groups as end groups thereon, said ester-forming groups being the same and selected from the group consisting of carBoxyl and hydroxyl groups, to polycondensation with an organic compound containing from two to 18 carbon atoms and having functional groups capable of forming ester linkages with the ester-forming groups of the hydrogenated polydiene, said organic compounds being selected from the group consisting of a glycol, an unsaturated carboxylic acid, and a saturated carboxylic acid and mixture thereof.
Claim 4
Dependent Claim
22 words
A polyester resin of claim 2, wherein when an excess amount of acid is utilized, the polyester resin has the general formula:
Claim 5
Dependent Claim
22 words
The polyester resin of claim 2, wherein when an excess amount of glycol is utilized, the polyester resin has the general formula:
Claim 6
Dependent Claim
24 words
The polyester resin of claim 2, wherein when an equivalent amount of acid and glycol is utilized, the polyester resin has the general formula:
Claim 7
Dependent Claim
17 words
The polyester resin of claim 2, wherein the polydiene has a hydrogenation ratio greater than 90 percent.
Claim 8
Dependent Claim
33 words
The polyester resin of claim 2, wherein the polydiene is a homopolymer or copolymer of at least one member selected from the group consisting of propanediene, 1,2-butadiene, 1,3-butadiene, 3,4-isoprene, 1,3-pentadiene, 1,4-pentadiene, and 1,5-hexadiene.
Claim 9
Dependent Claim
46 words
The polyester of claim 2, wherein the glycol is at least one member selected from the group consisting of ethylene glycol, diethylene glycol, triethylene glycol, 1,3-propylene glycol, dipropylene glycol, 1,3-butylene glycol, 2,3-butylene glycol, bisphenol dioxyethyl ether, bis-phenol dioxypropyl ether, neopentyl glycol, 1,4-butylene glycol, and 1,6-hexane diol.
Claim 10
Dependent Claim
50 words
The polyester resin of claim 2, wherein the saturated carboxylic acid is at least one member selected from the group consisting of adipic acid, sebacic acid, phthalic acid, phthalic anhydride, isophthalic acid, terephthalic acid, 3,6-endomethylene tetrahydro phthalic anhydride, tetrahydro phthalic acid, tetrachloro phthalic anhydride, and 3,6-endo-dichloro methylene tetra-chloro phthalic acid.
Claim 11
Dependent Claim
38 words
The polyester resin of claim 2, wherein the unsaturated carboxylic acid is at least one member selected from the group consisting of maleic acid, maleic anhydride, malic acid, methaconic acid, citraconic acid, itaconic acid and chlorinated maleic acid.
Claim 12
Dependent Claim
18 words
The polyester resin of claim 2, wherein the hydrogenated polydiene has hydroxyl groups as the ester forming groups.
Claim 13
Dependent Claim
18 words
The polyester resin of claim 2, wherein the hydrogenated polydiene has carboxylic groups as the ester forming groups.
Claim 14
Dependent Claim
13 words
The polyester resin of claim 2, wherein the hydrogenated polydiene is hydrogenated polybutadiene.
Claim 15
Dependent Claim
32 words
The composition of claim 3, wherein the vinyl monomer is selected from the group consisting of styrene, vinyl toluene, divinyl toluene, vinyl acetate, methyl methacrylate, ethyl methaacrylate, methyl acrylate and ethyl acrylate.
Claim 16
Dependent Claim
9 words
The composition of claim 3, further containing a filler.
Claim 17
Dependent Claim
12 words
The composition of claim 3, wherein the hydrogenated polydiene is hydrogenated polybutadiene.
Claim 18
Dependent Claim
18 words
The composition of claim 3, wherein the hydrogenated polydiene has a hydrogenation ratio of greater than 90 percent.
Claim 19
Dependent Claim
10 words
The method of claim 4, wherein the polydiene is polybutadiene.
Claim 20
Dependent Claim
16 words
The method of claim 4, wherein the polyester resin is mixed with a copolymerizable vinyl monomer.
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |