| 摘要 |
This invention relates to a process for the production of hot melt coating compositions containing microcapsules and inorganic pigment particles comprising the following: An aqueous dispersion of microcapsules is prepared. Inorganic pigment particles are added to the aqueous dispersion of the microcapsules and mixed. The dispersion of the microcapsules and the inorganic pigment particles are sprayed into a heated atmosphere, thereby drying the dispersion and producing a free-flowing powder of the microcapsules. The inorganic pigment particles are substantially deposited on and adhered to the microcapsules. The free-flowing powder of the microcapsules having the inorganic pigment particles deposited thereon are then dispersed in a liquid hot melt suspending medium. The liquid hot melt coating composition so produced can be coated on a substrate. The invention further relates to a coating composition comprising microcapsules, from about 0.1% to about 20%, by weight, inorganic pigment particles based on the weight of the microcapsules and a hot melt suspending medium. The inorganic particles are substantially deposited on and adhered to the microcapsules. |
