US3937753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid dyeable polyesters
Assignee: Shell USA Inc
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Filing: 1975-01-23
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Granted: 1976-02-10
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Expires: 1995-01-23
Abstract
Abstract The invention relates to polyester resin modified with hydantoin diacid or hydantoin diol and cyclohexyl diethanolamine. The copolyesters are dyeable with acid type dyes to form brightly colored fibers and fabrics.
Inventors
- 👤 Maneung Hahn
- 👤 Leroy C. T. Lin
- 👤 William C. T. Tung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:45
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/685; C08G63/6854; C08G63/6856
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
80 words
A block polymer containing blocks of polyethylene terephthalate and polymer blocks selected from the group consisting of (A) blocks of a polymer of diacid having the hydantoin nucleus in its structure and cyclohexyl diethanolamine and (B) blocks of a polymer of diacid having the hydantoin nucleus in its structure and a mixture of cyclohexyl diethanol amine and a diol selected from the group consisting of hydantoin diol, a polymethylene diol containing from 2 to 10 methylene groups and polyether diols.
Claim 2
Dependent Claim
80 words
A block polymer containing blocks of polyethylene terephthalate and polymer blocks selected from the group consisting of (A) blocks of a polymer of diacid having the hydantoin nucleus in its structure and cyclohexyl diethanolamine and (B) blocks of a polymer of diacid having the hydantoin nucleus in its structure and a mixture of cyclohexyl diethanol amine and a diol selected from the group consisting of hydantoin diol, a polymethylene diol containing from 2 to 10 methylene groups and polyether diols.
Claim 3
Dependent Claim
68 words
The polymer of claim 1 in which the hydantoin materials have the general formula ##EQU3## where R 1 and R 2 are H or the same or different hydrocarbon radicals selected from the group consisting of alkyl, aryl, alkaryl, aralkyl and heterocyclic radicals, n and n' are integers from 1 to 6 and X is --OH in the hydantoin diol and X is --COOH in the hydantoin diacid.
Claim 4
Dependent Claim
53 words
The polymer of claim 1 in which the hydantoin diacid has the general formula ##EQU4## where R 1 and R 2 are H or the same or different hydrocarbon radicals selected from the group consisting of alkyl, aryl, alkaryl, aralkyl and heterocyclic radicals and n and n' are integers from 1 to 6.
Claim 5
Dependent Claim
53 words
The polymer of claim 1 in which the hydantoin diol has the general formula ##EQU5## where R 1 and R 2 are H or the same or different hydrocarbon radicals selected from the group consisting of alkyl, aryl, alkaryl, aralkyl and heterocyclic radicals and n and n' are integers from 1 to 6.
Claim 6
Dependent Claim
12 words
The polymer of claim 3 in which di(2-carboxyethyl) dimethyl hydantoin is used.
Claim 7
Dependent Claim
12 words
The polymer of claim 4 in which di(2-hydroxyethyl) dimethyl hydantoin is used.
Claim 8
Dependent Claim
39 words
The polymer of claim 1 in which the modifying blocks comprise from about 2 to about 20 percent by weight of the block copolymer and said modifying blocks have an average degree of polymerization of from 2 to 20.
Claim 9
Dependent Claim
13 words
The block copolymer of claim 1 in the form of a dyed fiber.
Claim 10
Dependent Claim
12 words
The block copolymer of claim 1 in the form of a film.
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) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |