Particulate materials

Details Particulate materials Particulate materials

1997-06-02

1999-03-09

Michl, Paul R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523216, C08K 900

Patent

active

058801774

ABSTRACT:
A method of preparing an inorganic particulate material suitable for incorporation in a composition comprising a hydrophobic polymeric material includes the steps of (a) processing an aqueous suspension of an inorganic particulate material in the presence of a water soluble dispersing agent; (b) adding a surfactant to the particulate material; and (c) drying the particulate material. The inorganic particulate material to which the surfactant has been added may be further treated by addition thereto of a further surface treatment agent which is a hydrophobising surface treatment agent, eg. a carboxylic acid or salt thereof. The surfactant may be a non-ionic surfactant and may be added to the particulate material whilst in the form of a dispersed aqueous suspension. The further surface treatment agent may be added to the particulate material during or after the drying step (c).

REFERENCES:
patent: 4746543 (1988-05-01), Zinkan
patent: 4803231 (1989-02-01), Seinera et al.
patent: 4925586 (1990-05-01), Baker
patent: 5362413 (1994-11-01), Kaufmann
patent: 5364729 (1994-11-01), Lawrynowicz
patent: 5366841 (1994-11-01), Patel
patent: 5370964 (1994-12-01), Patel
patent: 5403693 (1995-04-01), Patel

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