AQUEOUS COATING COMPOSITIONS HAVING LOW OR ZERO VOCS AND COMPRISING ENCAPSULATED OR POLYMER ADSORBED PIGMENTS AND LETDOWN BINDERS

• Main Authors: FU ZHENWEN, WANG WENQIN, HERMES ANN R
• Format: Patent
• Language: English; Korean
• Published: 07.03.2016
• 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; PREPARATION OF CARBON BLACK; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES; USE OF MATERIALS THEREFOR; WOODSTAINS

The present invention provides a resin composition useful as a zero VOC coating composition, having opacifying pigment volume concentration (OPVC%) of 2 to 25, wherein the resin composition comprises: (i) an opacifier composition of a particle type which is selected from at least partially polymer encapsulated opacifying pigment, a polymer opacifying pigment composite, and a mixture thereof, wherein the opacifying pigment is encapsulated and/or in at least one soft polymer having a measured glass transition temperature (measurement tg) of less than or equal to 5 oc and a composite with the same; and (ii) a hard binder polymer having tg of at least 30 oc and a weight average particle size of less than or equal to 120 nm. The ratio of the weight average particle size of the hard binder to the weight average particle size of the opacifier composition is at least 2:1 to 12:1, and the volume ratio of to the soft polymer solid to the opacifying pigment in the opacifier composition is 2:5 to 1:12. 본 발명은 (i) 적어도 부분적으로 중합체 캡슐화된 불투명 안료, 중합체 불투명 안료 복합체 및 그의 혼합물에서 선택되고, 상기 불투명 안료는 측정 유리전이온도 (측정 tg)가 5 oc 이하인 적어도 하나의 연질 중합체에 캡슐화되고/되거나 그와 복합체로서 있는 입자 형태의 불투명제 조성물, 및, (ii) tg가 적어도 30 oc이고 중량 평균 입자 크기가 120 nm 이하인 경질 결합제 중합체를 포함하고, 여기서 불투명제 조성물의 중량 평균 입자 크기 대 경질 결합제 중합체의 중량 평균 입자 크기의 비가 적어도 2:1 내지 12:1이며, 불투명제 조성물중 불투명 안료 대 연질 중합체 고체의 부피비가 2:5 내지 1:12인, 2 내지 25의 불투명 안료 부피 농도% (opvc%)를 가지는, 무 voc 코팅 조성물로서 유용한 수성 조성물을 제공한다.