W. R. Grace Co.-conn.

David Chin

Chia-Chih Ou

Cynthia Louise Ebner

Craig T Walloch

Bahram Siadat

Exemplary carbon dioxide absorbent compositions of the invention incorporate calcium hydroxide, water, and a phosphonic acid or salt thereof. The composition is made into a paste and formed into particles that are conveniently and efficiently processable. When hardened, the particles have excellent carbon dioxide absorbent performance, crush resistance, and pore structure.

Calcium hydroxide absorbent with rheology modifier and process involving same

An additive is provided that comprises a single blend of an acid component and calcium stearate for simultaneously controlling both primary and secondary efflorescence in concrete, and particularly in concrete masonry units such as pavers. A preferred method comprises the steps of partially saponifying tall oil fatty acid with calcium hydroxide, and thereafter adding calcium stearate dispersion to form a stable emulsion blend. In another embodiment, potassium hydroxide is mixed with calcium stearate dispersion, then subsequently introduced into tall oil fatty acid to provide a non-emulsion TOFA/CSD blend.

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Charlestown, MA, United States of America

David Chin