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US4377650A
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Process for the preparation of colored powders of hydrolyzed ethylene-vinyl acetate copolymer
Assignee: Equistar Chemicals LP
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Filing: 1980-10-31
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Granted: 1983-03-22
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Expires: 2000-10-31
Abstract
Abstract Pigment is finely dispersed in hydrolyzed ethylene-vinyl acetate copolymer by subjecting the copolymer to which pigment has previously been added by simple, non-intensive mixing to solution hydrolysis and/or by adding pigment to the solution hydrolysis medium prior to or during hydrolysis of the copolymer therein.
Inventors
- 👤 Joseph Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:22
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J3/212; C08F; C08F8/00; C08F8/12; C08F2800/00; C08F2800/20; C08F2810/00; C08F2810/50
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
69 words
A process for the preparation of colored particles of hydrolyzed ethylene-vinyl acetate copolymer in the absence of intensive mixing methods which comprises hydrolyzing ethylene-vinyl acetate copolymer in solution in the presence of coloring agent, said coloring agent being present in the ethylene-vinyl acetate copolymer prior to hydrolysis of the latter, and thereafter recovering the hydrolyzed ethylene-vinyl acetate copolymer in the form of particles having coloring agent finely dispersed therein.
Claim 2
Dependent Claim
69 words
A process for the preparation of colored particles of hydrolyzed ethylene-vinyl acetate copolymer in the absence of intensive mixing methods which comprises hydrolyzing ethylene-vinyl acetate copolymer in solution in the presence of coloring agent, said coloring agent being present in the ethylene-vinyl acetate copolymer prior to hydrolysis of the latter, and thereafter recovering the hydrolyzed ethylene-vinyl acetate copolymer in the form of particles having coloring agent finely dispersed therein.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein the coloring agent is an inorganic coloring agent.
Claim 4
Dependent Claim
43 words
The process of claim 2 wherein the inorganic coloring agent is at least one oxide of a metal selected from the group consisting of titanium, zinc, iron, chromium, lead, aluminum, nickel; a chromate, sulfide, sulfoselenide, ferrocyanide, silicate, carbon black, or any mixture thereof.
Claim 5
Dependent Claim
14 words
The process of claim 1 wherein the coloring agent is an organic coloring agent.
Claim 6
Dependent Claim
39 words
The process of claim 4 wherein the organic coloring agent is at least one member of the group consisting of the phthalocyanines, the beta-naphthol derivatives, chloronitroaniline, pyrazalone, arylides of naphthoic acid or acetoacetic acid, the anthraquinones and the alizarins,
Claim 7
Dependent Claim
16 words
The process of claim 5 wherein the phthalocyanine coloring agent is phthalocyanine blue or phthalocyanine green.
Claim 8
Dependent Claim
29 words
The process of claim 1 wherein the coloring agent is present in the hydrolyzed ethylene-vinyl acetate copolymer at a level of from about 0.1 to about 80 weight percent.
Claim 9
Dependent Claim
28 words
The process of claim 7 wherein the coloring agent is present in the hydrolyzed ethylene-vinyl acetate copolymer at a level of from about 0.1 to 20 weight percent.
Claim 10
Dependent Claim
21 words
The process of claim 2 wherein the coloring agent has been added to the ethylene-vinyl acetate copolymer by simple, non-intensive mixing.
References Cited (Backward Citations)
US3449291A
Cited
US3674736A
Cited
US3636136A
Cited
US3669922A
Cited
US3976618A
Cited
US4119687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-21 | 1986-09-20 | 1987-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-21 | 1990-09-20 | 1991-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-21 | 1994-09-20 | 1995-03-22 | $7700.00 | Window Closed / Lapsed |