Invention Grant
- Patent Title: Low titianium dioxide coatings
- Patent Title (中): 低二氧化钛涂层
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Application No.: US13091930Application Date: 2011-04-21
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Publication No.: US08435340B2Publication Date: 2013-05-07
- Inventor: Stephen Arthur Wheeler , Anthony David Woods , Simon Nicholas Emmett , Javier Perez-Amoros
- Applicant: Stephen Arthur Wheeler , Anthony David Woods , Simon Nicholas Emmett , Javier Perez-Amoros
- Applicant Address: NL Arnhem
- Assignee: Akzo Nobel Coatings International B.V.
- Current Assignee: Akzo Nobel Coatings International B.V.
- Current Assignee Address: NL Arnhem
- Agency: Kenyon & Kenyon LLP
- Priority: EP10161204 20100427
- Main IPC: C04B14/30
- IPC: C04B14/30

Abstract:
An aqueous coating composition having a PVC of from 78 to 88% comprising, based on the total volume solids of the dry coating unless otherwise stated:a) opacifying pigment particles comprising i) from 3 to 10% titanium dioxide, ii) from 0 to 20% of hollow polymeric particles; b) non-opacifying extender particles comprising i) calcium magnesium carbonate, and/or ii) calcium carbonate, and/or iii) nepheline syenite, and/or iv) kaolin, wherein i)+ii)+iii)+iv)=40 to 80%, and iv) is 0 to 20%; c) polymer binder particles of calculated Fox Tg of from 25 to 70° C. having an acid value of from 15 to 65 mg KOH/g of polymer and wherein the polymer particles are derived from acrylic monomers and optionally further comprising styrene and/or its derivatives; d) dispersant having a weight average molecular weight of at least 3500 Daltons; e) fugitive coalescing solvent; wherein the composition is free of non-fugitive coalescing solvent.
Public/Granted literature
- US20110311801A1 LOW TITIANIUM DIOXIDE COATINGS Public/Granted day:2011-12-22
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