EP0153600A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Coating compositions containing polymeric microparticles
Assignee: PPG Industries Inc
•
Filing: 1985-01-30
•
Granted: —
•
Expires: 2005-01-30
Abstract
Abstract Coating compositions containing a film-forming polymer and crosslinked polymeric microparticles and articles coated with such compositions are disclosed. The crosslinked polymeric microparticles are prepared by polymerizing in aqueous medium a mixture of vinyl monomers which includes a hydrolyzable vinyl silane monomer. The crosslinked polymeric microparticles improve sag resistance and metallic pigment pattern control of the coating composition. A particular advantage of the microparticles of the present invention is that they can be prepared with high crosslink density enabling the formulation of high solids coatings.
Inventors
- 👤 Kurt Gordon Olson
- 👤 Marvis Edgar Hartman
- 👤 Suryya Kumar Das
- 👤 Rostyslaw Dowbenko
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 01:46
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/02; C09; C09D; C09D5/00; C09D5/38; C09D7/00; C09D7/40; C09D7/65; C08L25/00; C08L25/02; C08L25/04; C08L33/00; C08L33/04; C08L33/06; C08L33/08; C08L33/10; C08L35/00; C08L35/06
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
39 words
A coating composition comprising a film-forming polymer in combination with crosslinked polymeric microparticles, characterized in that the crosslinked polymeric microparticles are prepared by polymerizing in aqueous medium a mixture of vinyl monomers which includes a hydrolyzable vinyl silane monomer.
Claim 2
Dependent Claim
39 words
A coating composition comprising a film-forming polymer in combination with crosslinked polymeric microparticles, characterized in that the crosslinked polymeric microparticles are prepared by polymerizing in aqueous medium a mixture of vinyl monomers which includes a hydrolyzable vinyl silane monomer.
Claim 3
Dependent Claim
28 words
The coating composition of Claim 1 in which the polymeric microparticles are prepared in the presence of a hydrolyzable silane or silicate which do not contain vinyl groups.
Claim 4
Dependent Claim
59 words
The composition of Claim 1 in which the hydrolyzable vinyl silane monomer is of the structure (R) 3 -Si-X where X is a group of the structure: where R is a hydrolyzable radical selected from the group consisting of hydroxy, acetoxy and alkoxy radicals, n is an integer of from 1 to 8 and R' is hydrogen or methyl.
Claim 5
Dependent Claim
25 words
The composition of Claim 3 in which the alkoxy radicals are selected from the class consisting of methoxy, ethoxy, methoxyethoxy and acetoxy including mixtures thereof.
Claim 6
Dependent Claim
13 words
The composition of Claim 3 where the hydrolyzable vinyl silane monomer is gamma-methacryloxypropyltrimethoxysilane.
Claim 7
Dependent Claim
18 words
The composition of Claim 1 in which the crosslinked polymeric microparticles are prepared by aqueous emulsion polymerization techniques.
Claim 8
Dependent Claim
40 words
The composition of Claim 6 in which the polymerization is initiated at a pH of from about 5 to 8 and as the polymerization is continued, the pH drops to about 2 to 4 at the completion of the polymerization.
Claim 9
Dependent Claim
19 words
The composition of Claim 6 in which the polymerization is conducted in the presence of persulfate free radical initiator.
Claim 10
Dependent Claim
10 words
The composition of Claim 1 which is organic solvent based.
Claim 11
Dependent Claim
28 words
The composition of Claim 9 in which the aqueous medium of crosslinked polymeric microparticles is inverted into organic diluent and the resultant dispersion is at least partially dehydrated.
Claim 12
Dependent Claim
63 words
The composition of Claim 1 in which the mixture of vinyl monomers includes a monomer selected from the class consisting of alkyl acrylates and alkyl methacrylates containing from 1 to 20 carbon atoms in the alkyl group, hydroxyalkyl acrylates and methacrylates containing from 2 to 4 carbon atoms in the alkyl group, vinyl aromatic compounds and acid group-containing vinyl monomers, including mixtures thereof.
Claim 13
Dependent Claim
33 words
The composition of Claim 9 in which the monomer is selected from the class consisting of methyl methacrylate, n-butyl acrylate, isobutyl methacrylate, 2-ethylhexyl acrylate, hydroxypropyl methacrylate, sulfoethyl methacrylate and styrene, including mixtures thereof.
Claim 14
Dependent Claim
9 words
The coating composition of Claim 1 which is aqueous-based.
Claim 15
Dependent Claim
14 words
A coated article comprising a substrate and the composition of Claim 1 adhered thereto.
Claim 16
Dependent Claim
30 words
The article of Claim 14 in which the composition is pigmented and is adhered to the substrate to form a basecoat, and a clear coating is adhered to the basecoat.
Claim 17
Dependent Claim
20 words
The article of Claim 15 in which both the basecoat and the clear coat comprise the composition of Claim 1.
Claim 18
Dependent Claim
12 words
The article of Claim 15 in which the basecoat is organic solvent-based.
Claim 19
Dependent Claim
11 words
The article of Claim 15 in which the basecoat is aqueous-based.
References Cited (Backward Citations)
DE1745341A1
Cited
US4075141A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.