Structured kaolin pigments

Details Structured kaolin pigments Structured kaolin pigments

1987-01-09

1989-05-02

Schain, Howard E.

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106288R, 106306, 106309, 106308C, 106308B, 106308Q, 106308P, 106308M, 501 46, 501147, 501150, 501148, 427391, 427361, 4285375, 428688, 428446, 162135, 1621816, 1621818, 1621817, 1621814, C04B 1400, C04B 3304, C09C 300, D21F 110

Patent

active

048265365

ABSTRACT:
The invention relates to a structured kaolinitic pigment having improved physical and optical characteristics when incorporated as a filler or coating pigment in paper. The pigment consists of porous aggregates of kaolin particles which are chemically bonded together. The pigment may be produced by chemically reacting a particulate kaolin with a metal chloride, such as silicon tetrachloride, and with urea or an organic amine. The process is conducted under conditions such that the kaolinite structure is not altered.

REFERENCES:
patent: 4299807 (1981-11-01), Angel et al.
patent: 4419228 (1983-12-01), Cook et al.
patent: 4650521 (1987-03-01), Kappelman et al.
patent: 4738726 (1988-04-01), Pratt et al.

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