Patent US4379871A successfully refreshed from Google Patents.
US4379871A
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US
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Process for the production of carbon black containing pigment-synthetic resin concentrates
Assignee: Evonik Operations GmbH
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Filing: 1977-12-30
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Granted: 1983-04-12
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Expires: 1997-12-30
Abstract
Abstract There is disclosed a process for the production of a pigment-synthetic resin concentrate containing an organic solvent soluble polymer and carbon black having quicker distributability in organic media such as lacquer binding media, printing inks, etc., such concentrates being especially suitable for the production of molded parts, castings, films and/or synthetic fibers, the process comprising continuously homogenizing in a mixer powdery pigment and powdery synthetic resin jointly with an organic solvent in a given case also containing plasticizer, stabilizer and/or dispersing acid, dispersing the pigment in the mixture, removing the solvent from the dispersion, comminuting the resulting pigment-synthetic resin concentrated and grinding the product.
Inventors
- 👤 Peter Werle
- 👤 Hans Graf
- 👤 Erwin Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:31
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
96 words
In a process for the production of a pigment-synthetic resin concentrate containing an organic solvent soluble polymer and carbon black having rapid distributability in organic solvent media, the improvement consisting essentially of continuously homogenizing in a mixer (1) a carbon black containing pigment powder and (2) an organic solvent soluble synthetic resin with (3) an organic solvent for said synthetic resin as the sole solvent and in an amount sufficient to dissolve the synthetic resin, dispersing the pigment in the mixture, removing the solvent from the dispersion by drying and comminuting the resulting pigment-synthetic resin concentrate.
Claim 2
Dependent Claim
96 words
In a process for the production of a pigment-synthetic resin concentrate containing an organic solvent soluble polymer and carbon black having rapid distributability in organic solvent media, the improvement consisting essentially of continuously homogenizing in a mixer (1) a carbon black containing pigment powder and (2) an organic solvent soluble synthetic resin with (3) an organic solvent for said synthetic resin as the sole solvent and in an amount sufficient to dissolve the synthetic resin, dispersing the pigment in the mixture, removing the solvent from the dispersion by drying and comminuting the resulting pigment-synthetic resin concentrate.
Claim 3
Dependent Claim
32 words
The process of claim 1 wherein there is also included at least one member of the group consisting of plasticizers for the synthetic resin stabilizers for the synthetic resin and dispersing agents.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein there is included a dispersing agent.
Claim 5
Dependent Claim
15 words
The process of claim 1 wherein there is included a plasticizer for the synthetic resin.
Claim 6
Dependent Claim
24 words
The process of claim 1 wherein there is included a member of the group consisting of heat and light stabilizers for the synthetic resin.
Claim 7
Dependent Claim
18 words
The process of claim 1 comprising carrying out the dispersing in a plurality of grinding apparatus in succession.
Claim 8
Dependent Claim
32 words
The process of claim 1 wherein the solvent consists essentially of a member of the group consisting of acetone, dimethyl formamide, carbon tetrachloride, ethyl acetate, tetrahydrofuran, toluene, chloroform, ethyl alcohol and o-chlorophenol.
Claim 9
Dependent Claim
18 words
The process of claim 1 comprising removing the solvent from the dispersion by means of vacuum drum drying.
Claim 10
Dependent Claim
19 words
The process of claim 8 comprising carrying out the vacuum drum drying at a pressure up to 100 Torr.
Claim 11
Dependent Claim
18 words
The process of claim 9 wherein the pressure in the vacuum drum drying is up to 70 Torr.
Claim 12
Dependent Claim
21 words
The process of claim 9 wherein the solvent is removed from the dispersion at a temperature between 40° and 170° C.
Claim 13
Dependent Claim
32 words
The process of claim 11 wherein the solvent is removed from the dispersion at a temperature between 50° and 160° C. and the vacuum drum drying is at up to 70 Torr.
Claim 14
Dependent Claim
22 words
The process of claim 8 comprising removing the solvent from a dispersion having a solids content of 10 to 50 weight %.
Claim 15
Dependent Claim
15 words
The process of claim 13 wherein the solids content is 14 to 47 weight %.
Claim 16
Dependent Claim
22 words
The process of claim 1 comprising removing the solvent from the dispersion by atomizing drying with the aid of an atomizing gas.
Claim 17
Dependent Claim
11 words
The process of claim 15 wherein the atomizing gas is nitrogen.
Claim 18
Dependent Claim
27 words
The process of claim 15 wherein the atomizing gas has an entrance temperature of 100° to 200° C. and an exit temperature of 60° to 100° C.
Claim 19
Dependent Claim
23 words
The process of claim 15 wherein the pigment-synthetic resin concentrate which is atomized has a solids concentration of 10 to 40 weight %.
Claim 20
Dependent Claim
18 words
The process of claim 18 wherein the concentration of the atomized pigment-synthetic resin concentrate is 15-25 weight %.
Claim 21
Dependent Claim
45 words
The process of claim 1 wherein the carbon black is selected from the group consisting of High Color Channel blacks, Regular Color Channel blacks, Long-F low Impingement blacks, Medium Color Channel blacks, Fine Color-Furnace blacks, Fine Color Furnace modified blacks and Medium Color Furnace blacks.
Claim 22
Dependent Claim
34 words
The process of claim 1 wherein the synthetic resin comprises a member selected from the group consisting of polyvinyl chloride-polyvinyl acetate mixed polymer, polyacrylonitrile, polystyrene, nitrocellulose, polyvinyl chloride, polyethylene, polymethyl methacrylate, polyamides and polyesters.
Claim 23
Dependent Claim
18 words
The process of claim 1 wherein the ratio of synthetic resin to pigment is from 85:15 to 45:55.
Claim 24
Dependent Claim
18 words
The process of claim 22 wherein the ratio of synthetic resin to pigment is from 82:18 to 49:51.
Claim 25
Dependent Claim
27 words
The process of claim 22 wherein the synthetic resin is used in a concentration of from 6.0 to 40.0 weight % of the mixture to be dispersed.
Claim 26
Dependent Claim
29 words
The process of claim 24 wherein the dispersion the ratio of the sum of the synthetic resin and pigment to the solvent is from 1:1.0 to 1:7.0 by weight.
Claim 27
Dependent Claim
12 words
The process of claim 25 wherein said ratio is 1:1.0 to 1:6.0.
Claim 28
Dependent Claim
33 words
The process of claim 1 wherein a plasticizer for the synthetic resin is present in an amount as to 20 weight % based on total weight of synthetic resin and pigment is used.
Claim 29
Dependent Claim
12 words
The process of claim 27 wherein the plasticizer is 2-5 weight %.
Claim 30
Dependent Claim
41 words
The process of claim 1 wherein a stabilizer of the group consisting of heat and light stabilizers for the synthetic resin is present in a concentration up to 2 weight % based on the total weight of synthetic resin and pigment.
Claim 31
Dependent Claim
18 words
The process of claim 29 wherein the stabilizer is present in an amount up to 0.5 weight %.
Claim 32
Dependent Claim
30 words
The process of claim 1 wherein a dispersing agent is present in an amount up to 0.3 weight % based on the total weight of the synthetic resin and pigment.
Claim 33
Dependent Claim
19 words
The process of claim 31 wherein the dispersing agent is present in an amount up to 0.2 weight %.
Claim 34
Dependent Claim
61 words
The process of claim 1 wherein the improvement consists essentially of continuously homogenizing in a mixer materials consisting essentially of (1) a carbon black containing pigment powder and (2) an organic solvent soluble synthetic resin with (3) an organic solvent, dispersing the pigment in the mixture, removing the solvent from the dispersion by drying and comminuting the resulting pigment-synthetic resin concentrate.
Claim 35
Dependent Claim
15 words
The process of claim 1 wherein the drying is spray drying or vacuum drum drying.
Claim 36
Dependent Claim
11 words
The process of claim 34 wherein the drying is spray drying.
Claim 37
Dependent Claim
12 words
The process of claim 34 wherein the drying is vacuum drum drying.
Claim 38
Dependent Claim
101 words
In a process for the production of a pigment-synthetic resin concentrate containing an organic solvent soluble polymer and carbon black having rapid distributability in organic solvent media, the improvement consisting essentially of continuously homogenizing in a mixer (1) a carbon black containing pigment powder and (2) an organic solvent soluble synthetic resin with (3) an organic solvent, said organic solvent consisting of a solvent for said synthetic resin and being present in an amount sufficient to dissolve the synthetic resin, dispersing the pigment in the mixture, removing the solvent from the dispersion by drying and comminuting the resulting pigment-synthetic resin concentrate.
Claim 39
Dependent Claim
101 words
In a process for the production of a pigment-synthetic resin concentrate containing an organic solvent soluble polymer and carbon black having rapid distributability in organic solvent media, the improvement consisting essentially of continuously homogenizing in a mixer (1) a carbon black containing pigment powder and (2) an organic solvent soluble synthetic resin with (3) an organic solvent, said organic solvent consisting of a solvent for said synthetic resin and being present in an amount sufficient to dissolve the synthetic resin, dispersing the pigment in the mixture, removing the solvent from the dispersion by drying and comminuting the resulting pigment-synthetic resin concentrate.
Claim 40
Dependent Claim
20 words
The process of claim 37 wherein the solvent is removed by atomizing drying with the aid of an atomizing gas.
Claim 41
Dependent Claim
11 words
The process of claim 37 wherein the drying is spray drying.
Claim 42
Dependent Claim
12 words
The process of claim 37 wherein the drying is vacuum drum drying.
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US2913432A
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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) | 1986-04-11 | 1986-10-11 | 1987-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-11 | 1990-10-11 | 1991-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-11 | 1994-10-11 | 1995-04-12 | $7700.00 | Window Closed / Lapsed |