US4368258A
Expired / Lapsed
US
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Process for preparing impregnated polymer latex compositions
Assignee: Konica Minolta Inc
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Filing: 1981-03-11
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Granted: 1983-01-11
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Expires: 2001-03-11
Abstract
Abstract In the process for preparing impregnated polymer latex compositions by impregnating a hydrophobic substance in dispersed polymer particles in an aqueous polymer latex, the improvement comprises impregnating said hydrophobic substance, wherein the impregnation is effected by mixing said hydrophobic substance which is solid state, a water-miscible organic solvent and aqueous polymer latex wherein a polymer of the polymer latex is prepared from ethene monomers and containing at least one hydrophilic group.
Inventors
- 👤 Mitsuto Fujiwhara
- 👤 Syunji Matsuo
- 👤 Tsuneo Wada
- 👤 Naoto Abe
- 👤 Toyoaki Masukawa
- 👤 Akio Iijima
- 👤 Keiji Oishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:09
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J3/215; G; G03; G03C; G03C7/00; G03C7/30; G03C7/388; G03C7/3882; C08J2321/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
246 words
In the process for preparing impregnated polymer latex compositions by impregnating a hydrophobic substance into dispersed polymer particles in an aqueous polymer latex, the improvement comprising impregnating said hydrophobic substance, wherein the impregnation is effected by mixing said hydrophobic substance which is in the solid state, with a water-miscible organic solvent and the aqueous polymer latex comprising a dispersion of said polymer particles in water, said polymer of the polymer latex is prepared from ethene monomers and contains at least one hydrophilic group, said mixing which effects said impregnation being carried out by one of the following four mixing operations: (i) forming a suspension of particles of said hydrophobic substance in said aqueous polymer latex and then adding small portions of said water-miscible organic solvent to said suspension; (ii) adding and mixing particles of said hydrophobic substance, and said water-miscible organic solvent, from different hoppers to said aqueous polymer latex at the same time; (iii) adding and mixing said aqueous polymer latex, particles of said hydrophobic substance, and said water-miscible organic solvent or in one receptacle at the same time; or (iv) adding and mixing particles of said hydrophobic substance to a mixture of said aqueous polymer latex and a water-miscible organic solvent; whereby said solid state hydrophobic substance is gradually dissolved by said water-miscible solvent while said dissolved hydrophobic substance is being impregnated into said dispersed polymer particles, and finally said polymer particles are finely dispersed in a medium comprising water and said water-miscible solvent.
Claim 2
Dependent Claim
246 words
In the process for preparing impregnated polymer latex compositions by impregnating a hydrophobic substance into dispersed polymer particles in an aqueous polymer latex, the improvement comprising impregnating said hydrophobic substance, wherein the impregnation is effected by mixing said hydrophobic substance which is in the solid state, with a water-miscible organic solvent and the aqueous polymer latex comprising a dispersion of said polymer particles in water, said polymer of the polymer latex is prepared from ethene monomers and contains at least one hydrophilic group, said mixing which effects said impregnation being carried out by one of the following four mixing operations: (i) forming a suspension of particles of said hydrophobic substance in said aqueous polymer latex and then adding small portions of said water-miscible organic solvent to said suspension; (ii) adding and mixing particles of said hydrophobic substance, and said water-miscible organic solvent, from different hoppers to said aqueous polymer latex at the same time; (iii) adding and mixing said aqueous polymer latex, particles of said hydrophobic substance, and said water-miscible organic solvent or in one receptacle at the same time; or (iv) adding and mixing particles of said hydrophobic substance to a mixture of said aqueous polymer latex and a water-miscible organic solvent; whereby said solid state hydrophobic substance is gradually dissolved by said water-miscible solvent while said dissolved hydrophobic substance is being impregnated into said dispersed polymer particles, and finally said polymer particles are finely dispersed in a medium comprising water and said water-miscible solvent.
Claim 3
Dependent Claim
22 words
The process as claimed in claim 1, wherein said mixing which effects said impregnation is carried out by said mixing operation (i).
Claim 4
Dependent Claim
22 words
The process as claimed in claim 1, wherein said mixing which effects said impregnation is carried out by said mixing operation (ii).
Claim 5
Dependent Claim
22 words
The process as claimed in claim 1, wherein said mixing which effects said impregnation is carried out by said mixing operation (iii).
Claim 6
Dependent Claim
22 words
The process as claimed in claim 1, wherein said mixing which effects said impregnation is carried out by said mixing operation (iv).
Claim 7
Dependent Claim
64 words
The process as claimed in claim 1, wherein the ethene monomer has radical polymerizing capacity by way of emulsion copolymerization, said polymer comprising at least one compound having at least one hydrophilic group selected from the group consisting of sulfo group, sulfonate group, sulfonyl group, carboxy group, carboxylate group, hydroxy group, amide group, sulfonamide group, quaternary ammonium group, polyalkylene oxide group and sulfate group.
Claim 8
Dependent Claim
44 words
The process as claimed in claim 1, wherein the polymer of the aqueous polymer latex contains 1-50% by weight of monomer units having hydrophilic group selected from the group consisting of carboxy group, carboxylate group, sulfo group, sulfonate group, sulfonyl group and sulfate group.
Claim 9
Dependent Claim
25 words
The process as claimed in claim 1, wherein the polymer of the aqueous polymer latex contains 10-70% by weight of monomer units having hydroxy group.
Claim 10
Dependent Claim
55 words
The process as claimed in claim 1, wherein the polymer of the aqueous polymer latex contains 2-50% by weight of monomer units having hydrophilic group selected from the group consisting of carboxy group, carboxylate group, sulfo group, sulfonate group, sulfate group and sulfonyl group, and 0.2-10% by weight of monomer units having active methylene group.
Claim 11
Dependent Claim
21 words
The process as claimed in claim 1, wherein the polymer concentration of the aqueous polymer latex is below 50% by weight.
Claim 12
Dependent Claim
16 words
The process as claimed in claim 1, wherein the hydrophobic substance is a hydrophobic photographic additive.
Claim 13
Dependent Claim
32 words
The process as claimed in claim 11, wherein the hydrophobic photographic additive is a dye-forming agent, a UV absorbent, a developing inhibitor-releasing substance, a cross oxidation dye-releasing agent or a photographic dye.
Claim 14
Dependent Claim
24 words
The process as claimed in claim 1, wherein the water-miscible organic solvent is miscible in water in an amount more than 10% by weight.
Claim 15
Dependent Claim
69 words
The process of claim 1, consisting essentially of mixing particles of said hydrophobic substance with said water-miscible organic solvent and said aqueous polymer latex wherein a polymer of the polymer latex is prepared from ethene monomers and contains at least one hydrophilic group, whereby said solid state hydrophobic substance is gradually dissolved by said water-miscible solvent while said dissolved hydrophobic substance is being impregnated into said dispersed polymer particles.
Claim 16
Dependent Claim
181 words
In the process for preparing impregnated polymer latex compositions by impregnating a hydrophobic substance into dispersed polymer particles in an aqueous polymer latex, the improvement comprising impregnating said hydrophobic substance, wherein the impregnation is effected by mixing said hydrophobic substance which is in the solid state, with a water-miscible organic solvent and the aqueous polymer latex comprising a dispersion of said polymer particles in water, said polymer of the polymer latex is prepared from ethene monomers and contains at least one hydrophilic group, said mixing which effects said impregnation being carried out by one of the following four mixing operations: (i) forming a suspension of particles of said hydrophobic substance in said aqueous polymer latex and then adding small portions of said water-miscible organic solvent to said suspension; or (ii) adding and mixing particles of said hydrophobic substance, and said water-miscible organic solvent, from different hoppers to said aqueous polymer latex at the same time; whereby said solid state hydrophobic substance is gradually dissolved by said water-miscible solvent while said dissolved hydrophobic substance is being impregnated into said dispersed polymer particles.
Claim 17
Dependent Claim
181 words
In the process for preparing impregnated polymer latex compositions by impregnating a hydrophobic substance into dispersed polymer particles in an aqueous polymer latex, the improvement comprising impregnating said hydrophobic substance, wherein the impregnation is effected by mixing said hydrophobic substance which is in the solid state, with a water-miscible organic solvent and the aqueous polymer latex comprising a dispersion of said polymer particles in water, said polymer of the polymer latex is prepared from ethene monomers and contains at least one hydrophilic group, said mixing which effects said impregnation being carried out by one of the following four mixing operations: (i) forming a suspension of particles of said hydrophobic substance in said aqueous polymer latex and then adding small portions of said water-miscible organic solvent to said suspension; or (ii) adding and mixing particles of said hydrophobic substance, and said water-miscible organic solvent, from different hoppers to said aqueous polymer latex at the same time; whereby said solid state hydrophobic substance is gradually dissolved by said water-miscible solvent while said dissolved hydrophobic substance is being impregnated into said dispersed polymer particles.
Claim 18
Dependent Claim
23 words
The process as claimed in claim 1, wherein said mixing which effects said impregnation is carried out by the said mixing operation (i).
Claim 19
Dependent Claim
23 words
The process as claimed in claim 1, wherein said mixing which effects said impregnation is carried out by the said mixing operation (ii).
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) | 1986-01-10 | 1986-07-12 | 1987-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-10 | 1990-07-12 | 1991-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-10 | 1994-07-12 | 1995-01-11 | $7700.00 | Window Closed / Lapsed |