Chapter 4. Effects of Polyacrylate and Sodium Silicate Dispersant on Plaster Mold Characteristics

  1. John B. Wachtman Jr
  1. L. Behal and
  2. D. Schelker

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314807.ch4

A Collection of Papers Presented at the 97th Annual Meeting and the 1995 Fall Meetings of the Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 17, Issue 1

A Collection of Papers Presented at the 97th Annual Meeting and the 1995 Fall Meetings of the Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 17, Issue 1

How to Cite

Behal, L. and Schelker, D. (1996) Effects of Polyacrylate and Sodium Silicate Dispersant on Plaster Mold Characteristics, in A Collection of Papers Presented at the 97th Annual Meeting and the 1995 Fall Meetings of the Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 17, Issue 1 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314807.ch4

Author Information

  1. H.C. Spinks Clay Co., Inc., Paris, Tennessee

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1996

ISBN Information

Print ISBN: 9780470375402

Online ISBN: 9780470314807

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Keywords:

  • deflocculant;
  • sodium;
  • polyacrylate;
  • gypsum;
  • microscope

Summary

An investigation was performed to determine the relative effects of sodium silicate and sodium polyactylate dispersant on the performance and life of plaster molds. Sanitatyware casting slips were prepared using each deflocculant as the sole dispersant in the system and were cast under simulated plant conditions. Moisture content of the molds, rate of moisture absorption, and casting rate were monitored daily. Changes in mold characteristics over 120 casts were found to correlate with deflocculant type.