US4141928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester and process for making same
Assignee: Monsanto Co
•
Filing: 1978-01-11
•
Granted: 1979-02-27
•
Expires: 1998-01-11
Abstract
Abstract Fiber forming polyesters are modified by the incorporation in the chain of hydantoin derivatives having polyalkoxylated groups linked to the ring nitrogens. These polyesters exhibit desirable properties such as improved dyeability, thermal oxidative stability, light stability and dyed light fastness.
Inventors
- 👤 II Ernest L. Lawton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:47
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/685; C08G63/6854; C08G63/6856; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
199 words
A process for preparing a copolyester consisting essentially of recurring units of the formula ##STR17## comprising heating at a temperature of at least 150° C. and in the presence of a suitable catalyst a mixture composed of a first polyester consisting essentially of recurring units (I) and a second polyester consisting essentially of recurring units (II), wherein at least 20% by weight of said mixture consist of said first polyester; wherein A is a radical selected from the group consisting of ##STR18## and branched or linear alkylene radicals containing from 4 to 10 carbon atoms; wherein Y is selected from the group consisting of branched or linear C 1 -C 4 alkylenes, --O--, --S--, and --SO 2 --; wherein G is selected from the group consisting of branched or linear C 2 -C 10 alkylenes and C 5 -C 10 cycloalkylenes; wherein R 1 and R 2 are individually selected from the group consisting of hydrogen, aryls containing from 6-10 carbon atoms, alkyls containing from 1-20 carbon atoms, and cycloalkyls containing from 5-10 carbon atoms; and wherein x is an integer from 0-20, y is an integer from 0-20 and the sum of x+y is from 1 to 30.
Claim 2
Dependent Claim
199 words
A process for preparing a copolyester consisting essentially of recurring units of the formula ##STR17## comprising heating at a temperature of at least 150° C. and in the presence of a suitable catalyst a mixture composed of a first polyester consisting essentially of recurring units (I) and a second polyester consisting essentially of recurring units (II), wherein at least 20% by weight of said mixture consist of said first polyester; wherein A is a radical selected from the group consisting of ##STR18## and branched or linear alkylene radicals containing from 4 to 10 carbon atoms; wherein Y is selected from the group consisting of branched or linear C 1 -C 4 alkylenes, --O--, --S--, and --SO 2 --; wherein G is selected from the group consisting of branched or linear C 2 -C 10 alkylenes and C 5 -C 10 cycloalkylenes; wherein R 1 and R 2 are individually selected from the group consisting of hydrogen, aryls containing from 6-10 carbon atoms, alkyls containing from 1-20 carbon atoms, and cycloalkyls containing from 5-10 carbon atoms; and wherein x is an integer from 0-20, y is an integer from 0-20 and the sum of x+y is from 1 to 30.
Claim 3
Dependent Claim
18 words
The process defined in claim 1 wherein the sum of x+y is an integer from 1 to 20.
Claim 4
Dependent Claim
18 words
The process defined in claim 1 wherein the sum of x+y is an integer from 4 to 15.
Claim 5
Dependent Claim
22 words
The process defined in claim 1 wherein the weight percent of said second ester is from about 4 to about 10 percent.
Claim 6
Dependent Claim
16 words
The process defined in claim 1 wherein R 1 ad R 2 are --CH 3 .
Claim 7
Dependent Claim
17 words
The process of claim 5 wherein A is ##STR19## and --G-- is --CH 2 CH 2 --.
Claim 8
Dependent Claim
169 words
A process for preparing a copolyester consisting essentially of recurring units of the formula ##STR20## comprising heating at a temperature of at least 150° C. and in the presence of a suitable catalyst a mixture composed of a polyester prepolymer consisting essentially of recurring units (I) and a hydantoin compound of the formula ##STR21## wherein at least 20% by weight of said mixture consist of said first polyester; wherein A is a radical selected from the group consisting of ##STR22## and branched or linear alkylene radicals containing from 4 to 10 carbon atoms; wherein Y is selected from the group consisting of branched or linear C 1 -C 4 alkylenes, --O--, --S--, and --SO 2 --; wherein G is selected from the group consisting of hydrogen, aryls containing from 6-10 carbon atoms, alkyls containing from 1-20 carbon atoms, and cycloalkyls containing from 5-10 carbon atoms; and wherein x is an integer from 0-20, y is an integer from 0-20 and the sum of x+y is from 1 to 30.
Claim 9
Dependent Claim
169 words
A process for preparing a copolyester consisting essentially of recurring units of the formula ##STR20## comprising heating at a temperature of at least 150° C. and in the presence of a suitable catalyst a mixture composed of a polyester prepolymer consisting essentially of recurring units (I) and a hydantoin compound of the formula ##STR21## wherein at least 20% by weight of said mixture consist of said first polyester; wherein A is a radical selected from the group consisting of ##STR22## and branched or linear alkylene radicals containing from 4 to 10 carbon atoms; wherein Y is selected from the group consisting of branched or linear C 1 -C 4 alkylenes, --O--, --S--, and --SO 2 --; wherein G is selected from the group consisting of hydrogen, aryls containing from 6-10 carbon atoms, alkyls containing from 1-20 carbon atoms, and cycloalkyls containing from 5-10 carbon atoms; and wherein x is an integer from 0-20, y is an integer from 0-20 and the sum of x+y is from 1 to 30.
Claim 10
Dependent Claim
18 words
The process defined in claim 7 wherein the sum of x+y is an integer from 1 to 20.
Claim 11
Dependent Claim
18 words
The process defined in claim 7 wherein the sum of x+y is an integer from 4 to 15.
Claim 12
Dependent Claim
16 words
The process defined in claim 7 wherein R 1 and R 2 are --CH 3 .
Claim 13
Dependent Claim
17 words
The process of claim 10 wherein A is ##STR23## and --G-- is --CH 2 CH 2 --.
References Cited (Backward Citations)
US2744087A
Cited
US2895946A
Cited
US2905657A
Cited
US2921828A
Cited
US3625754A
Cited
US3652734A
Cited
CA978193A
Cited
US3856754A
Cited
US3937755A
Cited
US3937753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |