Liquid color system for use in rotational molding and method of

Details Liquid color system for use in rotational molding and method of Liquid color system for use in rotational molding and method of

1996-07-17

1998-06-02

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264311, 106499, 106504, B29C 4104

Patent

active

057594724

ABSTRACT:
The present invention provides a new and improved liquid color system for use in rotational molding. The liquid color system includes from about 10% to about 75% by weight carrier, from about 0% to about 15% by weight water, from about 0.01% to about 10% by weight dispersant and from about 10% to about 80% by weight colorant. The carrier comprises a material selected from the group consisting of propylene glycol, ethylene glycol, diethylene glycol, tri(ethylene glycol), glycerin and mixtures of such materials. The liquid color system displays an evaporation rate of from about 0.01 to about 0.36 pursuant to the test procedures of ASTM D3539-87. The invention also provides a method of using the liquid color system which includes the step of mixing the liquid color system with the polymeric resin powder using a distributive mixer prior to rotational molding.

REFERENCES:
patent: 3966488 (1976-06-01), Langenfelder
patent: 4587318 (1986-05-01), Inoue et al.
patent: 4668461 (1987-05-01), Needham
patent: 4738815 (1988-04-01), Friesen
patent: 4909852 (1990-03-01), Atkinson
patent: 5157067 (1992-10-01), Burditt et al.

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