Aqueous Dispersion of Hydrophobically Modified Pigment Particles

• Main Authors: RADKE, CLAYTON J, VAN DYKE, ANTONY, ROPER III, JOHN A, JANKOLOVITS, JOSEPH, BOHLING, JAMES, CHARLES, KATZ, ALEXANDER
• Format: Patent
• Language: Chinese; English
• Published: 08.03.2017
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; USE OF MATERIALS THEREFOR; WOODSTAINS

The present invention relates to a composition comprising a) a stable aqueous dispersion of inorganic pigment particles hydrophobically modified with covalently bonded polysiloxane or silyl groups; and b) a polymeric anionic dispersant; wherein the hydrophobically modified inorganic pigment particles have an average particle size in the range of from 200 nm to 10 [mu]m, and the solids content of the hydrophobically modified inorganic pigment particles is from 10 to 80 weight percent, based on the weight of inorganic pigment particles and water. The composition of the present invention provides a way to improve water resistance in coatings formulations. 本发明涉及种组合物，所述组合物包含a)用共价键合的聚硅氧烷或甲硅烷基疏水改性的无机颜料粒子的稳定水性分散体；以及b)聚合物阴离子分散剂；其中疏水改性的无机颜料粒子的平均粒度在200nm至10μm范围内，并且以无机颜料粒子和水的重量计，疏水改性的无机颜料粒子的固体含量为10重量％至80重量％。本发明的组合物提供种改善在涂料调配物中的耐水性的方法。