US3668172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pigmented polyester compositions
Assignee: Hercules LLC
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Filing: 1969-11-25
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Granted: 1972-06-06
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Expires: 1989-11-25
Abstract
Abstract Uniformly pigmented polyester compositions which can be melt spun into fine denier multifilament fibers are described. The preferred compositions are homogeneous blends of unpigmented polyester and a polyethylene pigment concentrate composed of pigment highly dispersed in a mixture of low molecular weight polyethylene, high molecular weight, medium density polyethylene and a surfactant. The most preferred blends also contain a small amount of a phosphoric acid ester.
Inventors
- 👤 George F Jones
- 👤 John R Mendel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:38
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08L; C08L67/00; C08L67/02; C08J2367/00; C08J2367/02; C08J2423/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
17 words
The composition of claim 1 wherein the low molecular weight and high molecular weight polyolefins are polyethylene.
Claim 2
Dependent Claim
15 words
The composition of claim 2 wherein the high molecular weight polyethylene is medium density Polyethylene.
Claim 3
Dependent Claim
170 words
A process for producing a uniformly pigmented polyester fiber which comprises blending an unpigmented, thermoplastic, linear condensation polyester and sufficient of a polyolefin pigment concentrate to provide from 0.1 to 4 percent of an organic pigment or from 0.1 to 5 percent of an inorganic pigment based on the weight of the blend and then melt spinning the blend into fiber, said concentrate being composed of pigment highly dispersed in a mixture of low molecular weight polyolefin having a molecular weight from about 1,000 to about 10,000, high molecular weight polyolefin having a molecular weight above about 20,000 and a heat stable surfactant soluble or dispersible in the low molecular weight polyolefin and capable of wetting out the pigment in the polyolefin, the ratio of high molecular weight polyolefin to low molecular weight polyolefin being 2:1 to 4:1 and the ratio of low molecular weight polyolefin to pigment being 0.8:1 to 1.2:1 when the pigment is an organic pigment and 0.1:1 to 0.5:1 when the pigment is an inorganic pigment.
Claim 4
Dependent Claim
90 words
A polyester fiber containing by weight of the fiber from about 0.1 to about 3 percent of pigment, from 0.02 to about 3 percent of low molecular weight polyolefin having a molecular weight from about 1,000 to about 10,000, from about 0.1 to about 6 percent of high molecular weight polyolefin having a molecular weight above about 20,000 and from about 0.001 to about 1 percent of a heat stable surfactant soluble or dispersible in the low molecular weight polyolefin and capable of wetting out the pigment in the polyolefin.
Claim 5
Dependent Claim
26 words
The fiber of claim 5 wherein the surfactant is a mixed alkyl diethyleneoxide amine acetate having a mixed alkyl group containing 12 to 18 carbon atoms.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |