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

1999-05-06

2000-10-31

Mullis, Jeffrey C.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

521 56, 521 59, 521 60, 521 65, 525243, B32B 2312, C08J 916, C08J 922

Patent

active

061399612

ABSTRACT:
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.degree. C., the first shell having polymerized thereon a second shell polymer having a glass transition temperature of -15.degree. C. to -50.degree. 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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