EP0219868A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Crosslinked polymer microparticle
Assignee: EIDP Inc
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Filing: 1986-10-23
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Granted: —
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Expires: 2006-10-23
Abstract
Abstract Crosslinked polymer microparticles that have a particle size of about 0.1-5 microns of polymerized monomers of styrene, alkyl methacrylate having 1-12 carbons in the alkyl group, alkyl acrylate having 1-12 carbon atoms in the alkyl group and mixtures thereof, about 0.1-5% by weight of a crosslinking monomer of an alkylene glycol dimethacrylate or diacrylate each having 1-8 carbon atoms in the alkyl group and about 0.1-5% by weight of allyl methacrylate or allyl acrylate; said polymer having a weight average molecular weight of about 500,000 to 5,000,000; optionally, polymeric chains can be grafted onto the polmyer microparticles; the microparticles are useful as additives for coating compositions to control rheology and in particular for metallic pigment flake and sag control.
Inventors
- 👤 Joseph Albert Antonelli
- 👤 Joseph Edmond Mclaughlin
- 👤 Clifford Hugh Strolle
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 05:58
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/04; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F220/00; C08F220/02; C08F220/10; C08F220/12
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
93 words
Crosslinked polymer microparticles having a particle size of about 0.1-5 microns consisting essentially of polymerized monomers selected from the group consisting of styrene, alkyl methacrylate having 1-12 carbons in the alkyl group, alkyl acrylate having 1-12 carbon atoms in the alkyl group and mixtures thereof, about 0.1-5% by weight of a crosslinking monomer of an alkylene glycol dimethacrylate or diacrylate each having 1-8 carbon atoms in the alkyl group, and about 0.1-5% by weight of allyl methacrylate or allyl acrylate; said polymer having a weight average molecular weight of about 500,000 to 5,000,000.
Claim 2
Dependent Claim
93 words
Crosslinked polymer microparticles having a particle size of about 0.1-5 microns consisting essentially of polymerized monomers selected from the group consisting of styrene, alkyl methacrylate having 1-12 carbons in the alkyl group, alkyl acrylate having 1-12 carbon atoms in the alkyl group and mixtures thereof, about 0.1-5% by weight of a crosslinking monomer of an alkylene glycol dimethacrylate or diacrylate each having 1-8 carbon atoms in the alkyl group, and about 0.1-5% by weight of allyl methacrylate or allyl acrylate; said polymer having a weight average molecular weight of about 500,000 to 5,000,000.
Claim 3
Dependent Claim
20 words
The crosslinked microparticles of Claim 1 consisting essentially of methyl methacrylate, butyl methacrylate, styrene, butane diol diacrylate and allyl methacrylate.
Claim 4
Dependent Claim
36 words
The crosslinked microparticles of Claim 2 consisting essentially of 40-60% by weight methyl methacrylate, 20-40% by weight butyl methacrylate 10-30% by weight styrene, 0.1-5% by weight of butane diol diacrylate and 0.1-5% by weight allyl methacrylate.
Claim 5
Dependent Claim
18 words
The crosslinked microparticles of Claim 1 consisting essentially of styrene, butyl acrylate, butane diol diacrylate and allyl methacrylate.
Claim 6
Dependent Claim
19 words
The crosslinked microparticles of Claim 1 consisting essentially of methyl methacrylate, butyl acrylate, butane diol diacrylate and allyl methacrylate.
Claim 7
Dependent Claim
20 words
The crosslinked microparticles of Claim 1 consisting essentially of styrene, methyl methacrylate, butyl acrylate, butane diol diacrylate and allyl methacrylate.
Claim 8
Dependent Claim
170 words
Crosslinked polymer microparticles having a particle size of about 0.1-5 microns consisting essentially of a core of polymerized monomers selected from the group consisting of styrene, alkyl methacrylate having 1-12 carbons in the alkyl group, alkyl acrylate having 1-12 carbon atoms in the alkyl group and mixtures thereof and about 0.1-5% by weight of a crosslinking monomer of an alkylene glycol dimethacrylate or diacrylate each having 1-8 carbon atoms in the alkyl group, and about 0.1-5% by weight of allyl methacrylate or ally acrylate; said polymer having a weight average molecular weight of about 500,000 to 5,000,00 and having polymeric chains grafted to the core through residual allyl groups; wherein the chains have a weight average molecular weight of less than 20,000 and consist essentially of polymerized monomers selected from the group consisting of styrene, alkyl methacrylate having 1-12 carbons in the alkyl group, alkyl acrylate having 1-12 carbons in the alkyl group and mixtures thereof and hydroxy containing monomers of a hydroxy alkyl acrylate or a hydroxy alkyl methacrylate.
Claim 9
Dependent Claim
170 words
Crosslinked polymer microparticles having a particle size of about 0.1-5 microns consisting essentially of a core of polymerized monomers selected from the group consisting of styrene, alkyl methacrylate having 1-12 carbons in the alkyl group, alkyl acrylate having 1-12 carbon atoms in the alkyl group and mixtures thereof and about 0.1-5% by weight of a crosslinking monomer of an alkylene glycol dimethacrylate or diacrylate each having 1-8 carbon atoms in the alkyl group, and about 0.1-5% by weight of allyl methacrylate or ally acrylate; said polymer having a weight average molecular weight of about 500,000 to 5,000,00 and having polymeric chains grafted to the core through residual allyl groups; wherein the chains have a weight average molecular weight of less than 20,000 and consist essentially of polymerized monomers selected from the group consisting of styrene, alkyl methacrylate having 1-12 carbons in the alkyl group, alkyl acrylate having 1-12 carbons in the alkyl group and mixtures thereof and hydroxy containing monomers of a hydroxy alkyl acrylate or a hydroxy alkyl methacrylate.
Claim 10
Dependent Claim
39 words
The crosslinked microparticles of Claim 7 in which the core comprises about 40-80% by weight of the microparticle and the chains comprise about 20-60% by weight of the microparticle and have a weight average molecular weight of about 3,000-18,000.
Claim 11
Dependent Claim
49 words
The crosslinked microparticles of Claim 8 in which the core consists essentially of polymerized monomers of methyl methacrylate, butyl methacrylate, styrene, 1,4-butane diol dimethacrylate and allyl methacrylate and the chains grafted to the core consist essentially of polymerized monomers of styrene, ethyl methacrylate, lauryl methacrylate and hydroxy ethyl acrylate.
Claim 12
Dependent Claim
48 words
.10. The crosslinked microparticles of Claim 8 in which the core consists essentially of polymerized monomers styrene, butyl acrylate, butane diol dimethacrylate and allyl methacrylate and the chains grafted to the core consist essentially of polymerized monomers of methyl methacrylate, ethyl methacrylate, lauryl methacrylate and hydroxy ethyl acrylate.
Claim 13
Dependent Claim
50 words
The crosslinked microparticles of Claim 8 in which the core consists essentially of polymerized monomers of styrene, butyl acrylate, butane diol dimethacrylate and allyl methacrylate and the chains grafted to the core consist essentially of polymerized monomers of styrene, butyl acrylate, butyl methacrylate, hydroxy ethyl acrylate and hydroxy propyl methacrylate.
Claim 14
Dependent Claim
54 words
A coating composition comprising 20-80% by weight of a liquid carrier and 80-20% by weight of a film forming binder; wherein the binder consists essentially of a polymeric component having reactive groups, a crosslinking agent that will react with the polymeric component and about 0.1-15% by weight of crosslinked polymeric microparticles of Claim 1.
Claim 15
Dependent Claim
54 words
A coating composition comprising 20-80% by weight of a liquid carrier and 80-20% by weight of a film forming binder; wherein the binder consists essentially of a polymeric component having reactive groups, a crosslinking agent that will react with the polymeric component and about 0.1-15% by weight of crosslinked polymeric microparticles of Claim 7.
Claim 16
Dependent Claim
138 words
A process for forming crosslinked polymeric microparticles of Claim 1 which comprises (1) emulsion polymerizing in water of monomers selected from the group consisting of styrene, alkyl methacrylate or acrylate each having 1-12 carbon atoms in the alkyl groups or mixtures thereof and about 0.1-5% by weight of a crosslinking monomer of an alkylene glycol dimethacrylate or diacrylate each having 1-8 carbon atoms in the alkyl group and about 0.1-5% by weight of allyl methacrylate or acrylate to form an emulsion of polymeric particles having a particle size of 0.1-5 microns and having a weight average molecular weight of about 500,000 - 5,000,000; (2) coagulating the resulting emulsion by the addition of a coagulating agent, (3) filtering the resulting coagulant from the emulsion, (4) washing and drying the coagulant and (5) pulverizing the resulting coagulant to form microparticles.
Claim 17
Dependent Claim
126 words
A process for forming crosslinked polymeric microparticles of Claim 1 which comprises (1) emulsion polymerizing in water monomers selected from the group consisting of styrene, alkyl methacrylate or acrylate having 1-12 carbon atoms in the alkyl group or mixtures thereof and about 0.1-5% by weight of a crosslinking monomer of an alkylene glycol dimethacrylate or diacrylate each having 1-8 carbon atoms in the alkyl group and about 0.1-5% by weight of allyl methacrylate to form an emulsion of polymeric particles having a particle size of 0.1-5 microns and having a weight average molecular weight of about 500,000 - 5,000,000. (2) adding the emulsion to an organic azotropic liquid, and removing water by azotropic distillation until a dispersion of microparticles in the organic azotropic liquid is formed.
Claim 18
Dependent Claim
188 words
A process for forming crosslinked polymeric microparticles of Claim 7 which comprises (1) emulsion polymerizing in water monomers selected from the group consisting of styrene, alkyl methacrylate or acrylate having 1-12 carbon atoms in the alkyl group or mixtures thereof and about 0.1-5% by weight of a crosslinking monomer of an alkylene glycol dimethacrylate or diacrylate each having 1-8 carbon atoms in the alkyl group and about 0.1 5% by weight allyl methacrylate; to form an emulsion of core forming polymeric particles having a particle size of 0.1-5 microns and having a weight average molecular weight of about 500,000 - 5,000,000; (2) converting the emulsion of polymeric particles into an organic solvent polymer solution; (3) polymerizable with residual allyl groups of the core monomers selected from the group consisting of styrene, alkyl methacrylate having 1-12 carbon atoms in the alkyl group, alkyl acrylate having 1-12 carbon atoms in the alkyl group and mixtures thereof and hydroxy containing monomers of a hydroxy alkyl acrylate or a hydroxy alkyl methacrylate to form polymeric chains having a weight average molecular weight of less than 20,000 that are grafted onto the core.
References Cited (Backward Citations)
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