Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1982-06-24
1984-04-24
Pavelko, Thomas P.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
B29B 100, B29F 100
Patent
active
044447140
ABSTRACT:
There is disclosed a stable liquid gel of colorants useful for incorporation in thermoplastic and thermosetting resins. The liquid gel comprises a liquid vehicle which is a plasticizer for the resins and which is gelled by an organophilic, expanding lattice clay which is ion exchanged with alkyl ammonium ions. Preferably the gel is modified by the addition of certain hydroxyalkyl fatty amines or fatty imidazolium quaternaries. The clay is employed at a sufficient concentration to form a stable gel and is milled into the liquid vehicle to form a pre-gel of substantially lesser than the final, desired viscosity. Solid, subdivided colorants are blended into the pre-gel at a concentration from 10 to about 70 weight percent and the resultant mixture is milled to the final desired viscosity. The presence of the fatty amine or fatty imidazolium compounds greatly increases the colorant loading capacity of the gel and imparts desirable properties to the molded products such as reduced brittleness and anti-static properties.
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American Organics Corporation
Pavelko Thomas P.
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