A redispersible core-shell polymer powder

Details A redispersible core-shell polymer powder A redispersible core-shell polymer powder

1991-07-11

1995-04-04

Jagannathan, Vasu S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525296, 525301, 525302, 525303, 525304, 525309, 525902, 524 8, 106713, C08F26502, C08F26504, C08F26506, C08F26510

Patent

active

054038944

ABSTRACT:
Redispersible polymer powders made by core-shell polymers having an alkali-soluble emulsion polymer shell and an aqueous-insoluble emulsion polymer core wherein the core and the shell polymers are chemically grafted by utilizing a polyfunctional compound. The core-shell polymers are produced by a two-stage sequential emulsion polymerization process in which an alkali-insoluble emulsion polymer core is polymerized in the presence of an alkali-solubilized emulsion polymer. When the core-shell polymer powders of this invention are employed as a cement modifier, improvements in the powder physical properties and cement mortar properties are realized.

REFERENCES:
patent: 4468498 (1984-08-01), Kowalski et al.
patent: 4876313 (1989-10-01), Lorah

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