Polymer-modified particulate titanium dioxide

Details Polymer-modified particulate titanium dioxide Polymer-modified particulate titanium dioxide

1994-01-31

1995-05-02

Szekely, Peter

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524847, 524413, 523205, 523206, C08K 322

Patent

active

054120195

ABSTRACT:
The tendency for hard and irregular particles of titanium dioxide pigment to adversely affect the sheen and coin mar resistance of a dried coating into which they have been incorporated is reduced by modifying the particles with polymer particles which have been preformed and are therefore of a more pre-determinable shape and size. The polymer particles are chemically bonded to a polymeric water-soluble compound containing moieties which are adsorbable onto the titanium dioxide particles so that on mixing a colloidally stabilised aqueous dispersion of the polymer particles with a colloidally stabilised aqueous dispersion of titanium dioxide particles, the moieties adsorb onto the titanium dioxide to form a colloidally stable aqueous dispersion of polymer-modified titanium dioxide which is useful in coating compositions.

REFERENCES:
patent: 3150110 (1964-09-01), Becker, Jr. et al.
patent: 4025483 (1977-05-01), Ramig, Jr.
patent: 4283320 (1981-08-01), Carrol et al.
patent: 4771086 (1988-09-01), Martin
patent: 4997864 (1991-03-01), Waters
Article in CRC Handbook of Chemistry and Physics by David R. Lide, Ph.D. pp. 1-20; 1-21.
European Search Report.

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