SEDL / STP / STP1176-EB / STP25546S

Solid Grade Acrylic Cement Modifiers

Tsai, M-C
Senior Research Chemist, Research Section Manager and Research Department Manager, Construction Products Research, Rohm and Haas Company, Spring House, PA

Burch, MJ
Senior Research Chemist, Research Section Manager and Research Department Manager, Construction Products Research, Rohm and Haas Company, Spring House, PA

Lavelle, JA
Senior Research Chemist, Research Section Manager and Research Department Manager, Construction Products Research, Rohm and Haas Company, Spring House, PA

Pages: 13    Published: Jan 1993

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Abstract

Acrylic latexes have been used successfully for over 30 years modifying cement mortar properties both for indoor and outdoor applications. Polymers containing 100% acrylic compositions in re-dispersible powder form can now be produced by spray drying of appropriate acrylic latexes. When re-dispersed in water, these acrylic dry polymers exhibited the same particle size characteristics as their parent latexes. Moreover, just like the acrylic latexes, the re-dispersible acrylic powders are well suited for improving cement mortar properties in a number of areas such as patching and repair mortars, spray coating, stucco, ceramic tile adhesives, building adhesives, shotcrete, etc. Compositional change can result in a re-dispersible acrylic powder with greater flexibility and better water resistance. A long term exposure study has demonstrated outstanding exterior durability of acrylic powder modified mortars.