EP0275899A2
Expired / Lapsed
EP
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Process for preparing particles having monodisperse particle size
Assignee: Nippon Paint Co Ltd
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Filing: 1988-01-12
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Granted: —
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Expires: 2008-01-12
Abstract
Abstract Disclosed is a process for preparing polymer particles having monodisperse particle size comprising: adding a dispersion stabilizer, a polymerizable monomer and a polymerization initiator to an organic solvent to conduct polymerization, wherein said organic solvent has a solubility parameter (SP value) higher than that of the resultant polymer by at least 1.0 and said dispersion stabilizer is soluble in said organic solvent and has a free radical reactive group of 10<-><3> to 1 mmol/g; and removing said organic solvent. part
Inventors
- 👤 Akio Kashihara
- 👤 Chikayuki Otsuka
- 👤 Katsukiyo Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 15:01
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/58; G01N33/585; C; C08; C08F; C08F2/00; C08F2/04; C08F2/06; C08F2/08; G01N33/53; G01N33/543; G01N33/54313; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08702; G03G9/08784; G03G9/08791
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
77 words
A process for preparing polymer particles having monodisperse particle size comprising: adding a dispersion stabilizer, a polymerizable monomer and a polymerization initiator to an organic solvent to conduct polymerization, wherein said organic solvent has a solubility parameter (SP value) higher than that of the resultant polymer by at least 1.0 and said dispersion stabilizer is soluble in said organic solvent and has a free radical reactive group of 10⁻³ to 1 mmol/g; and removing said organic solvent.
Claim 2
Dependent Claim
77 words
A process for preparing polymer particles having monodisperse particle size comprising: adding a dispersion stabilizer, a polymerizable monomer and a polymerization initiator to an organic solvent to conduct polymerization, wherein said organic solvent has a solubility parameter (SP value) higher than that of the resultant polymer by at least 1.0 and said dispersion stabilizer is soluble in said organic solvent and has a free radical reactive group of 10⁻³ to 1 mmol/g; and removing said organic solvent.
Claim 3
Dependent Claim
19 words
The process according to Claim 1 wherein said free radical reactive group is a free radical polymerizable double bond.
Claim 4
Dependent Claim
16 words
The process according to Claim 1 wherein said free radical reactive group is a mercapt group.
Claim 5
Dependent Claim
15 words
The process according to Claim 1 wherein to said polymerization initiator is an organic peroxide.
Claim 6
Dependent Claim
29 words
The process according to Claim 1 wherein said polymerizable monomer contains 0.2 to 50 % by weight of a polyethylenically monomer based on the total amount of said monomer.
Claim 7
Dependent Claim
16 words
The process according to Claim 1 wherein to said organic solvent is added a coloring agent.
Claim 8
Dependent Claim
20 words
The process according to Claim 6 wherein said coloring agent is a dye having a free radical polymerizable double bond.
Claim 9
Dependent Claim
33 words
The process according to Claim 7 wherein said dye having a free radical polymerizable double bond is prepared by an addition reaction of a dye having an active hydrogen with a methacryloyl isocyanate.
Claim 10
Dependent Claim
16 words
The process according to Claim 6 wherein said polymerizable monomer contains an amino group-containing polymerizable monomer.
Claim 11
Dependent Claim
16 words
The process according to Claim 6 wherein said polymerization initiator is an azo type amidine compound.
Claim 12
Dependent Claim
14 words
The process according to Claim 6 wherein said dispersion stabilizer has an amino group.
Claim 13
Dependent Claim
20 words
The process according to anyone of Claims 9 to 11 wherein said coloring agent is an acidic pigment or dye.
Claim 14
Dependent Claim
29 words
The process according to Claim 6 wherein said polymerizable monomer has a carboxyl group, a phosphoric acid group a sulfonic acid group, a persulfate group or a halogen atom.
Claim 15
Dependent Claim
17 words
The process according to Claim 6 wherein said polymerization initiator is an azo type carboxyl group-containing compound.
Claim 16
Dependent Claim
27 words
The process according to Claim 6 wherein said dispersion stabilizer has a carboxyl group, a phosphoric acid group, a sulfonic acid group or a sulfuric acid group.
Claim 17
Dependent Claim
20 words
The process according to anyone of Claims 13 to 15 wherein said coloring agent is a basic pigment or dye.
References Cited (Backward Citations)
No citation records indexed.
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