Date of Award

12-1992

Degree Name

Master of Science

Department

Chemical and Paper Engineering

First Advisor

Dr. James E. Kline

Second Advisor

Dr. Ellsworth Shriver

Third Advisor

Dr. Nick G. Triantafillopoulos

Access Setting

Masters Thesis-Open Access

Abstract

The effects of pigment size and shape on coating structure and binder migration has been investigated. Clays and ground calcium carbonates of different particle size distributions were used in coatings with 15 pph SB latex.

Coatings were applied to Mylar and a special Tyvek using a wire wound rod. The coatings were dried slowly under ambient conditions, and using hot air immediately or after having been allowed to reach immobilization through penetration into the Tyvek. The dried coatings were evaluated for water holding, relative pore size and migration using the UV technique to measure the increase in SB latex at the surface due to hot air drying.

Results showed that filler clay and calcium carbonate of large particle size resulted in a higher degree of binder migration. It was observed that rhombic shaped particles contributed to more migration than plate-shaped particles. Drying immediately after the application of coating allowed more binder to migrate to the surface than any other drying method.

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