US4752528A
Expired / Lapsed
US
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Modified fine particles and a process for their production
Assignee: Toray Industries Inc
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Filing: 1986-01-13
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Granted: 1988-06-21
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Expires: 2006-01-13
Abstract
Abstract Organic spherical particles having a cationic group and an average particle size of 0.1-1000 μm, which particles have adsorbed on the surface at least one modifier selected from a compound having an anionic group, fine particles having an anionic group and negatively chargeable fine particles, and also a process for their production, wherein where the particles are composed of an epoxy type resin cured with an amine type curing agent, they can satisfactorily adsorb the aforesaid substance. As a result of the adsorption of the aforesaid substance to the particles, the static build-up properties, electrical conductivity, color shade, and other properties of the particles may be modified, and also it is possible to impart ultraviolet light absorbing ability and to prevent blocking between the particles. These particles may be employed as formulation ingredients for cosmetics, paints, electrostatic copier toners etc.
Inventors
- 👤 Koichiro Oka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:55
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J3/215; C08J3/12; G; G03; G03G; G03G9/00; G03G9/08; G03G9/0802; G03G9/0804; G03G9/0806; G03G9/097; G03G9/09708; G03G9/09725; G03G9/09733; G03G9/09741; G03G9/0975; G03G9/09775; C08J2363/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
91 words
Surface-treated organic spherical particles prepared by subjecting organic spherical particles having a cationic group to surface treatment with a modifier selected from the group consisting of (i) water soluble compounds having an anionic group, (ii) water insoluble fine particles having an anionic group, and (iii) negatively chargeable nonionic fine particles, wherein said organic spherical particles have an average size of 01-1,000 microns and are composed of a member selected from the group consisting of (a) epoxy compounds cured with an amine curing agent and (b) acrylic polymers containing an amino group.
Claim 2
Dependent Claim
91 words
Surface-treated organic spherical particles prepared by subjecting organic spherical particles having a cationic group to surface treatment with a modifier selected from the group consisting of (i) water soluble compounds having an anionic group, (ii) water insoluble fine particles having an anionic group, and (iii) negatively chargeable nonionic fine particles, wherein said organic spherical particles have an average size of 01-1,000 microns and are composed of a member selected from the group consisting of (a) epoxy compounds cured with an amine curing agent and (b) acrylic polymers containing an amino group.
Claim 3
Dependent Claim
22 words
The surface-treatment organic spherical particles as defined in claim 1, wherein said organic spherical particles are composed of an epoxy type resin.
Claim 4
Dependent Claim
23 words
The surface-treated organic spherical particles as defined in claim 1, wherein the cationic group is a primary, secondary, tertiary or quanternary amino group.
Claim 5
Dependent Claim
21 words
The surface-treated organic spherical particles as defined in claim 1, wherein the compound having an anionic group is an ultraviolet absorber.
Claim 6
Dependent Claim
25 words
The surface-treated organic spherical particles as defined in claim 1, wherein the fine particles having an anionic group are oxide particles of an amphoteric element.
Claim 7
Dependent Claim
29 words
The surface-treated organic spherical particles as defined in claim 1, wherein the fine particles having an anionic group are fine particles haing a carboxyl group or a sulfone group.
Claim 8
Dependent Claim
33 words
The surface-treated organic spherical particles as defined in claim 1, wherein the fine particles having an anionic group are fine particles containing a surfaceactive agent having a carboxyl group or a sulfone group.
Claim 9
Dependent Claim
51 words
The surface-treated organic spherical particles as defined in claim 1, wherein the average particle size D of the organic spherical particles having a cationic group and the average particle size d of the fine particles having an anionic group or the negatively chargeable fine particles are in the following relationship: 5d<D.
Claim 10
Dependent Claim
21 words
The surface-treated organic spherical particles as defined in claim 1, wherein the compound having an anionic group is an inorganic acid.
Claim 11
Dependent Claim
18 words
The surface-treated organic spherical particles as defined in claim 9, wherein the inorganic acid is a polybasic acid.
Claim 12
Dependent Claim
22 words
The surface-treated organic spherical particles as defined in claim 1, wherein the compound having an anionic group is an organic acidic compound.
Claim 13
Dependent Claim
38 words
The surface-treated organic spherical particles as defined in claim 11, wherein the organic acidic compound has at least one sulfone group, carboxyl group or phenolic OH group or is a mono- or di-ester of an inorganic polybasic acid.
Claim 14
Dependent Claim
23 words
The surface-treated organic spherical particles as defined in claim 11, wherein the organic acidic compound is a polybasic acid having an aromatic ring.
Claim 15
Dependent Claim
20 words
The surface-treated organic spherical particles as defined in claim 1, wherein the negatively chargeable fine particles are metal fine particles.
Claim 16
Dependent Claim
30 words
The surface-treated organic spherical particles as defined in claim 14, wherein the metal fine particles are at least one type of particles selected from noble metal particles and solder particles.
Claim 17
Dependent Claim
19 words
The surface-treated organic spherical particles as defined in claim 1, wherein the negatively chargeable fine particles are latex particles.
Claim 18
Dependent Claim
47 words
The surface-treated organic spherical particles as defined in claim 16, wherein the latex particles are at least one type of latex selected from butadiene type, acrylate type, styrene type, vinyl acetate type, ethylene type, vinyl chloride type, vinylidene chloride type, silicone type and fluorine polymer type latexes.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1991-06-21 | 1991-12-21 | 1992-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-21 | 1995-12-21 | 1996-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-21 | 1999-12-21 | 2000-06-21 | $7700.00 | Window Closed / Lapsed |