Associatively dispersed pigments and coatings containing said pi

Details Associatively dispersed pigments and coatings containing said pi Associatively dispersed pigments and coatings containing said pi

1993-08-02

1994-06-14

Lieberman, Paul

Compositions: coating or plastic

Coating or plastic compositions

O-containing organic compound

106138, 1061541, 106213, 106468, 106437, 106486, 106499, 524543, 524555, C09D13308

Patent

active

053206720

ABSTRACT:
The present invention resides broadly in a dispersion of particles in a fluid medium which contains a polymeric dispersing agent. The particles are hydrophilic particles. The fluid medium has less than 0.5% by weight electrolyte based on the weight of the fluid medium. The polymeric dispersing agent is associative in nature, comprising hydrophilic moieties capable of adsorbing onto the particles, and hydrophobic moieties capable of interaction between themselves in the dispersion, or in a coating comprising the dispersion. The polymeric dispersing agent has a molecular weight in the range of 1,000 to 20,000, preferably in the range of 1,500 to 5,000, and is present in the dispersion in an amount in the range of 0.01 to 2.5 weight percent based on the weight of the particles which are dispersed.

REFERENCES:
patent: 3736165 (1973-05-01), Sawyer et al.
patent: 4384096 (1983-05-01), Sonnabend
patent: 4514552 (1985-04-01), Shay et al.
patent: 4517098 (1985-05-01), Hann et al.
patent: 4600761 (1986-07-01), Ruffner et al.
patent: 4616074 (1986-10-01), Ruffner
patent: 4743698 (1988-05-01), Ruffner et al.
patent: 4792343 (1988-12-01), Hawe et al.
Jorg Schroder, "Progress in Organic Coatings", (1988), vol. 16, pp. 3-17.
Robert D. Athey, Jr., "Polymeric Organic Dispersants for Pigments: Useful Structures and Their Evaluations", Oct., 1975), vol. 58, No. 10, pp. 55-61.

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