IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0555156
(2009-09-08)
|
등록번호 |
US-8557895
(2013-10-15)
|
발명자
/ 주소 |
- Ferencz, Joseph M.
- Polk, W. David
- Faler, Dennis L.
|
출원인 / 주소 |
- PPG Industries Ohio, Inc.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
104 |
초록
▼
Disclosed are aqueous dispersions of polymer-enclosed particles, such as nanoparticles. Also disclosed are methods for making an aqueous dispersion of polymer-enclosed particles, polymerizable polymers useful in such a method, powder coating compositions formed from such an aqueous dispersion, subst
Disclosed are aqueous dispersions of polymer-enclosed particles, such as nanoparticles. Also disclosed are methods for making an aqueous dispersion of polymer-enclosed particles, polymerizable polymers useful in such a method, powder coating compositions formed from such an aqueous dispersion, substrates at least partially coated with such a composition, and reflective surfaces comprising a non-hiding coating layer deposited from such a composition.
대표청구항
▼
1. A method for making an aqueous dispersion of polymer-enclosed particles comprising subjecting an aqueous medium to pulverizing conditions, wherein the aqueous medium comprises a mixture comprising: (a) particles,(b) an ethylenically unsaturated monomer, and(c) a water-dispersible ethylenically un
1. A method for making an aqueous dispersion of polymer-enclosed particles comprising subjecting an aqueous medium to pulverizing conditions, wherein the aqueous medium comprises a mixture comprising: (a) particles,(b) an ethylenically unsaturated monomer, and(c) a water-dispersible ethylenically unsaturated polymer, andwherein the polymer-enclosed particles are formed by polymerizing at least a portion of the ethylenically unsaturated monomer with the water-dispersible ethylenically unsaturated polymer during the pulverizing conditions. 2. The method of claim 1, wherein the pulverizing conditions forms nanoparticles from the particles. 3. The method of claim 1, wherein the water-dispersible ethylenically unsaturated polymer has a weight average molecular weight of 40,000 to 80,000 grams per mole. 4. The method of claim 1, wherein the particles comprise inorganic particles. 5. The method of claim 4, wherein the particles comprise inorganic particles selected from colloidal silica, fumed silica, amorphous silica, alumina, colloidal alumina, titanium dioxide, iron oxide, cesium oxide, yttrium oxide, colloidal yttria, colloidal zirconia, amorphous zirconia, and mixtures thereof. 6. The method of claim 2, wherein the nanoparticles have a maximum haze of 10%. 7. The method of claim 1, wherein the particles comprise organic particles. 8. The method of claim 7, wherein the organic particles comprise an organic pigment selected from perylene, quinacridone, phthalocyanine, isoindoline, dioxazine, 1,4-diketopyrrolopyrrole, anthrapyrimidine, anthanthrone, flavanthrone, indanthrone, perinone, pyranthrone, thioindigo, 4,4′-diamino-1,1′-dianthraquinonyl, azo compound, a substituted derivative thereof, and a mixtures thereof. 9. The method of claim 1, wherein the mixture further comprises a free radical initiator. 10. The method of claim 1, wherein the method does not include the step of subjecting the mixture to high stress shear conditions. 11. The method of claim 1, wherein the pulverizing conditions comprises milling. 12. A method for making an aqueous dispersion of polymer-enclosed nanoparticles comprising milling a mixture comprising: (a) particles, (b) an ethylenically unsaturated monomer, and (c) a water-dispersible ethylenically unsaturated polymer, in an aqueous medium, wherein the polymer-enclosed nanoparticles are formed by polymerizing the ethylenically unsaturated monomer with the water-dispersible ethylenically unsaturated polymer during the milling, andwherein the milling forms nanoparticles from the particles. 13. The method of claim 12, wherein the water-dispersible ethylenically unsaturated polymer has a weight average molecular weight of 40,000 to 80,000 grams per mole. 14. The method of claim 12, wherein the particles comprise inorganic particles. 15. The method of claim 12, wherein the particles comprise organic particles. 16. The method of claim 12, wherein the mixture further comprises a free radical initiator. 17. The method of claim 12, wherein the polymerization produces a friable polymer.
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