Patent US4298724A successfully refreshed from Google Patents.
US4298724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Branched polyesters for adhesives and coating compositions
Assignee: National Starch and Chemical Investment Holding Corp
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Filing: 1980-02-20
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Granted: 1981-11-03
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Expires: 2000-02-20
Abstract
Abstract Described are diol/higher polyol/aromatic acid/aliphatic acid branched polyesters of carefully controlled composition highly soluble in cheap, nontoxic organic solvents and suitable as components of adhesives, e.g., for bonding flexible plastics, and as components of organic coatings.
Inventors
- 👤 Eugene G. Sommerfeld
- 👤 Paul R. Noyes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:33
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/20; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C09; C09D; C09D167/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
134 words
A hydroxyl-containing polyester, soluble to the extent of at least 65% by weight in methyl ethyl ketone, formed from at least four different organic moieties: (1) at least one diol moiety having 2-14 carbons; (2) at least one triol or higher polyol moiety having 3-14 carbons; (3) at least one dibasic aromatic acid moiety; and (4) at least one dibasic aliphatic acid moiety, the mole ratio X 1 of total polyol to total polyacid being in the range 1.25/l to 1.8/l, the mole ratio X 2 of diol to higher polyol being in the range of 0.8/l to 1.5/l, and the mole ratio X 3 of aromatic acid to total acid being in the range 0.3/l to 0.8/l, not all of X 1 , X 2 and X 3 being at their extremes simultaneously.
Claim 2
Dependent Claim
134 words
A hydroxyl-containing polyester, soluble to the extent of at least 65% by weight in methyl ethyl ketone, formed from at least four different organic moieties: (1) at least one diol moiety having 2-14 carbons; (2) at least one triol or higher polyol moiety having 3-14 carbons; (3) at least one dibasic aromatic acid moiety; and (4) at least one dibasic aliphatic acid moiety, the mole ratio X 1 of total polyol to total polyacid being in the range 1.25/l to 1.8/l, the mole ratio X 2 of diol to higher polyol being in the range of 0.8/l to 1.5/l, and the mole ratio X 3 of aromatic acid to total acid being in the range 0.3/l to 0.8/l, not all of X 1 , X 2 and X 3 being at their extremes simultaneously.
Claim 3
Dependent Claim
40 words
A polyester of claim 1 wherein: (1) is ethylene glycol; (2) is at least one of trimethylolpropane, glycerine, pentaerithrytol, 1,2,6-hexanetriol and trimethylolethane; (3) is at least one phthalic acid; and (4) is at least one of adipic and azelaic acids.
Claim 4
Dependent Claim
28 words
The polyester of claim 1 wherein: (1) is ethylene glycol; (2) is trimethylolpropane; (3) is terephthalic and isophthalic acids; and (4) is azelaic acid, X 1 being 1.3.
Claim 5
Dependent Claim
16 words
The polyester of claim 3 wherein X 1 =1.3, X 2 =1.17 and X 3 =0.65.
Claim 6
Dependent Claim
23 words
The polyester of claim 1 wherein: (1) is ethylene glycol; (2) is 1,2,6-hexanetriol; (3) is terephthalic and isophthalic acids; and (4)is adipic acid.
Claim 9
Dependent Claim
144 words
The process of preparing a polyester of claim 1 which comprises reacting together: (1) at least one diol having 2-14 carbons; (2) at least one triol or higher polyol having 3-14 carbons; (3) at least one dibasic aromatic acid, anhydride, or lower alkyl ester thereof; and (4) at least one dibasic aliphatic acid, anhydride, or lower alkyl ester thereof, provided that when a lower alkyl ester is used, a transesterification catalyst is also used, the mole ratio X 1 of total polyol to total polyacid being in the range 1.25/l to 1.8/l, the mole ratio X 2 of diol to higher polyol being in the range 0.8/l to 1.5/l, and the mole ratio X 3 of aromatic acid to total acid being in the range 0.3/l to 0.8/l, not all of X 1 , X 2 and X 3 being at their extremes simultaneously.
Claim 10
Dependent Claim
11 words
The process of claim 6 wherein the reactants are refluxed together.
Claim 11
Dependent Claim
24 words
The process of claim 7 wherein: (1) is ethylene glycol; (2) is trimethylolpropane; (3) is terephthalic and isophthalic acids; and (4) is azelaic acid.
Claim 12
Dependent Claim
24 words
The process of claim 7 wherein: (1) is ethylene glycol; (2) is 1,2,6-hexanetriol; (3) is terephthalic and isophthalic acids; and (4) is adipic acid.
Claim 13
Dependent Claim
22 words
The process of claim 7 wherein: (1) is ethylene glycol; (2) is trimethylolpropane; (3) is dimethyl terephthalate; and (4) is dimethyl azelate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-02 | 1985-05-04 | 1985-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-02 | 1989-05-04 | 1989-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-02 | 1993-05-04 | 1993-11-03 | $7700.00 | Window Closed / Lapsed |