Hollow sphere organic pigment for paper or paper coatings

Details Hollow sphere organic pigment for paper or paper coatings Hollow sphere organic pigment for paper or paper coatings

B - Operations, Transporting

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403/12, 117/46.2

B01J 13/14 (2006.01) C08F 265/04 (2006.01) C08F 265/06 (2006.01) C08F 285/00 (2006.01) C08F 291/00 (2006.01) C09D 151/00 (2006.01) D21H 19/42 (2006.01) D21H 19/70 (2006.01) D21H 21/54 (2006.01)

Patent

CA 2272226

A hollow sphere organic pigment in which a core containing a void is encapsulated by a first shell polymer having a glass transition temperature greater than 50 °C, the first shell having polymerized thereon a second shell polymer having a glass transition temperature of -15 °C to -50 °C is provided.. Also provided is a paper or paperboard coating composition containing the hollow sphere organic pigment, a method for improving the strength and opacity of a paper or paperboard coating by using the coating composition dried, a coated paper or paperboard bearing the dried coating composition, and a method for improving the strength and opacity of paper or paperboard by incorporating a particular hollow sphere organic pigment into the formed wet sheet.

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