US3969312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colored filaments
Assignee: Imperial Chemical Industries Ltd
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Filing: 1971-07-02
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Granted: 1976-07-13
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Expires: 1991-07-02
Abstract
Abstract A process for the manufacture of filaments or films wherein a fiber-or film-forming polyester is melted, there is incorporated into the melt a proportion of at least one coloring material which is soluble in the melt and the resultant colored melt is extruded to form filaments or films.
Inventors
- 👤 Gerard Lees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:28
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/201; B; B29; B29C; B29C48/00; B29C48/25; B29C48/285; B29C48/286; B29C48/29; C08K; C08K5/00; C08K5/0008; C08K5/0041; B29C48/03; B29C48/05; B29C48/07; B29C48/08; B29K; B29K2105/00; B29K2105/0005; B29K2105/06; B29K2105/12; C08J2367/00; C08J2367/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
103 words
A process for the manufacture of filaments or films which comprises forming a melt of a fiber or film-forming polyester including a proportion of at least one coloring material which is soluble in the melt and extruding the colored melt to form filaments or films, said coloring matter being a disperse azo dye as listed in the Color Index and being further characterized by decomposing substantially completely when heated in a nitrogen atmosphere at 290°C for no longer than 120 seconds, said melt being extruded at a temperature and time in excess of the time and temperature at which said coloring matter decomposes.
Claim 2
Dependent Claim
103 words
A process for the manufacture of filaments or films which comprises forming a melt of a fiber or film-forming polyester including a proportion of at least one coloring material which is soluble in the melt and extruding the colored melt to form filaments or films, said coloring matter being a disperse azo dye as listed in the Color Index and being further characterized by decomposing substantially completely when heated in a nitrogen atmosphere at 290°C for no longer than 120 seconds, said melt being extruded at a temperature and time in excess of the time and temperature at which said coloring matter decomposes.
Claim 3
Dependent Claim
54 words
A process according to claim 1 wherein the coloring material is such that when exposed at a temperature of 282°C. in admixture with bis(β-hydroxyethyl) terephthalate at a concentration of 1 g. of coloring material to 100 g. of bis(β-hydroxyethyl) terephthalate, the rate of decomposition of coloring material does not exceed 10 percent per minute.
Claim 4
Dependent Claim
60 words
A process according to claim 1 wherein the coloring material is CI Disperse Red 72, CI Disperse Orange 30, CI Disperse Red 54, CI Disperse Red 74, CI Disperse Red 167, CI Disperse Blue 79, CI Disperse Brown 4, CI Disperse Red 131, CI Disperse Orange 13, CI Disperse Violet 33, CI Disperse Red 65 or CI Disperse Blue 122.
Claim 5
Dependent Claim
49 words
A process according to claim 1 wherein during the addition to and incorporation into the polyester of coloring material, the coloring material, whether separate or incorporated, has an exposure at the extrusion temperature not exceeding ten times the time to decomposition of the bulk coloring material at that temperature.
Claim 6
Dependent Claim
21 words
A process according to claim 1 wherein the incorporation of coloring material is effected by the use of a screw extruder.
Claim 7
Dependent Claim
23 words
A process according to claim 1 wherein the incorporation of coloring material is effected by the use of a screw pressure melting unit.
Claim 8
Dependent Claim
12 words
A process according to claim 1 wherein the polyester is poly(ethylene terephthalate).
Claim 9
Dependent Claim
14 words
A process according to claim 1 wherein the polyester is extruded at about 290°C.
References Cited (Backward Citations)
US2571319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |