Patent EP0209879A2 successfully refreshed from Google Patents.
EP0209879A2
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Colloidal size hydrophobic polymers particulate having discrete particles of an organic material dispersed therein
Assignee: Dow Chemical Co
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Filing: 1986-07-21
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Granted: —
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Expires: 2006-07-21
Abstract
Abstract Colloidal size particles of an organic solid such as a pigment are encapsulated in a hydrophobic addition polymer such as a polymer of styrene by a polymerization process wherein a water-immiscible (hydrophobic) monomer is dispersed in an aqueous colloidal dispersion of the organic particles and subjected to conditions of emulsion polymerization. The resulting encapsulated particles are usefully employed toners and pigments.
Inventors
- 👤 Jitka Solc
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 03:57
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0004; C09B67/0008; C09B67/0013; C08; C08F; C08F2/00; C08F2/44; Y; Y10; Y10S; Y10S526/00; Y10S526/909; Y10S526/911; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2989
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
69 words
A process for preparing a colloidal s iculate which process comprises the steps of (1) emulsifying a hydrophobic, emulsion polymerizable monomer in an aqueous colloidal dispersion of discrete particles of essentially water-insoluble organic solid and (2) subjecting the resulting emulsion to emulsion polymerization conditions to form a stable, fluid aqueous colloidal dispersion of the organic solid particles dispersed in a matrix of a water-insoluble polymer of the hydrophobic monomer.
Claim 2
Dependent Claim
69 words
A process for preparing a colloidal s iculate which process comprises the steps of (1) emulsifying a hydrophobic, emulsion polymerizable monomer in an aqueous colloidal dispersion of discrete particles of essentially water-insoluble organic solid and (2) subjecting the resulting emulsion to emulsion polymerization conditions to form a stable, fluid aqueous colloidal dispersion of the organic solid particles dispersed in a matrix of a water-insoluble polymer of the hydrophobic monomer.
Claim 3
Dependent Claim
21 words
The method of Claim 1 wherein the particles of the organic solid have an average diameter of less than 0.9 micrometer.
Claim 4
Dependent Claim
14 words
The method of Claim 1 wherein the particles of organic solids are organic pigments.
Claim 5
Dependent Claim
32 words
The method of Claim 1 wherein a water-soluble surfactant is used to emulsify the hydrophobic monomer, said surfactant being a potassium salt of a functionalized oligomer or salt of a fatty acid.
Claim 6
Dependent Claim
26 words
The method of Claim 1 wherein the monomer is a monovinylidene aromatic monomer, an alkyl ester of an ethylenically unsaturated carboxylic acid, or a mixture thereof.
Claim 7
Dependent Claim
16 words
The method of Claim 5 wherein the monomer is a mixture of styrene and butyl acrylate.
Claim 8
Dependent Claim
34 words
A particulate having colloidal size particles wherein substantially all of said particles comprise a hydrophobic polymer matrix and at least one discrete colloidal particle of an essentially water-insoluble organic solid dispersed in said matrix.
Claim 9
Dependent Claim
34 words
A particulate having colloidal size particles wherein substantially all of said particles comprise a hydrophobic polymer matrix and at least one discrete colloidal particle of an essentially water-insoluble organic solid dispersed in said matrix.
Claim 10
Dependent Claim
16 words
The particulate of Claim 7 wherein said organic solid is a pigment or a fire-retardant additive.
Claim 11
Dependent Claim
28 words
The particulate of Claim 7 which contains from 1 to 80 weight percent of the organic solid and from 20 to 99 weight percent of the matrix polymer.
Claim 12
Dependent Claim
23 words
The particulate of Claim 8 wherein the polymer is a polymer of styrene and methyl methacrylate or a polymer of styrene and acrylonitrile.
References Cited (Backward Citations)
No citation records indexed.
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