05-01-2017 дата публикации
Номер: US20170002181A1
Surface treatment of titanium dioxide, barium sulfate, zinc sulfide, and/or lithopone particles, and mixtures of said particles with specific alkoxylated siloxanes for the improvement of dispersion in plastics. 2. The particle as claimed in claim 1 , wherein{'sup': 1', '3, 'sub': 2', 'p', 'x', 'y', 'z, 'Ridentically or differently is —(CH)—O-EO—PO—BO—R,'}{'sup': '1', 'with the proviso that in Rthe total number of carbon atoms and oxygen atoms is at least 70,'}EO is oxyethylene,PO is oxypropylene,BO is oxybutylene,x is from 0 to 20,y is from 5 to 100,z is from 0 to 20,p is from 2 to 4.3. The particle as claimed in claim 1 , wherein a numeric ratio of a to b is from 8:1 to 18:1.4. The particle as claimed in claim 2 , index wherein x is between 0.05 and 1.2 times a sum of y and z.5. The particle as claimed in claim 2 , whereinR is methyl,A is from 80 to 95,B is from 5 to 8,{'sup': '3', 'Ris hydrogen,'}x is from 3 to 5,y is from 10 to 25,z is 0.6. The particle as claimed in claim 1 , which is a surface-treated is TiOparticle.7. The particle as claimed in claim 1 , which has a dust value of at most 80 mg per 100 g of surface-treated particles.9. A process for producing a polymer composition claim 1 , comprising mixing the particle of with a polymer.10. The process as claimed in claim 9 , wherein the polymer composition is processed to give a plastic molding or a plastic film.11. A composition claim 1 , comprising a polymer claim 1 , which comprises a particle as claimed in .12. The composition as claimed in claim 11 , wherein the polymer is a thermoset or thermoplastic.13. The composition as claimed in claim 11 , which is a masterbatch claim 11 , a plastic molding claim 11 , or a plastic film.14. The particle of claim 2 , which is a surface-treated TiOparticle.15. The particle of claim 1 , whereinZ is a branched alkylene moiety or an unbranched alkylene moiety comprising 3 carbon atoms,m is 3,n is 1 or 2,o is 0,a is from 30 to 170, andb is from 2 to 30,where 0.05 to 1% ...
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