US4093584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the mass coloration or whitening of linear polyesters
Assignee: Novartis Corp
•
Filing: 1975-12-10
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Granted: 1978-06-06
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Expires: 1995-12-10
Abstract
Abstract A process for the mass coloration or whitening of linear polyesters, wherein the polyester to be colored is mixed, in the solid or fused state, with a preparation consisting substantially of a colorant or fluorescent brightener which is soluble or insoluble in the polyester, and of a polystyrene with a softening point above 100° C, and the resultant mixture, provided it is not already in the form of a melt, is converted into the molten state and formed into shaped articles. Evenly and deeply colored polyesters are obtained.
Inventors
- 👤 Gunther Zwahlen
- 👤 Gerhard Umsonst
- 👤 Andreas Laely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:49
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/88; D01F6/92; C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0041; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L67/00; D01F1/00; D01F1/02; D01F1/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
81 words
A process for the mass colouration or whitening of linear polyesters, wherein the polyester to be coloured is mixed, in the solid or fused state, with a preparation consisting substantially of a colourant or fluorescent brightener which is soluble or insoluble in the polyester, and of a polystyrene with a softening point above 100° C, and the resultant mixture, provided it is not already in the form of a melt, is converted into the molten state and formed into shaped articles.
Claim 2
Dependent Claim
81 words
A process for the mass colouration or whitening of linear polyesters, wherein the polyester to be coloured is mixed, in the solid or fused state, with a preparation consisting substantially of a colourant or fluorescent brightener which is soluble or insoluble in the polyester, and of a polystyrene with a softening point above 100° C, and the resultant mixture, provided it is not already in the form of a melt, is converted into the molten state and formed into shaped articles.
Claim 3
Dependent Claim
20 words
A process according to claim 1, wherein the preparations contain organic pigments as colourants which are insoluble in the polyester.
Claim 4
Dependent Claim
16 words
A process according to claim 1, wherein the preparations contain 10-70% of colourant or fluorescent brightener.
Claim 5
Dependent Claim
16 words
A process according to claim 3, wherein the preparations contain 40-60% of colourant or fluorescent brightener.
Claim 6
Dependent Claim
40 words
Linear polyesters according to claim 1 which contain 0.01 to 5% of a colourant or fluorescent brightener that is soluble or insoluble in the polyester and 0.01 to 10% of a polystyrene with a softening point of over 100° C.
Claim 7
Dependent Claim
13 words
Linear polyesters according to claim 5 which contain an organic pigment as colourant.
References Cited (Backward Citations)
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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) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |