Patent GB-768844-A (GB)
Title: Improvements in or relating to pigmented organic plastics and method for preparing the same
IPC: C08J3/21
Filed: 1954-05-20
Abstract: The process of grinding or milling pigment and solid particles of plastic material, e.g. alkyd resins, aldehyde condensation products, vinyls, rubber, rubber synthetics, and cellulose derivatives, in the presence of a liquid consisting of water and a water-miscible solvent or swelling agent, described in Specification 699,185, is modified by the addition to the liquid of a minor proportion of a water-immiscible solvent or swelling agent such as xylol or monochlorbenzene.  In examples, coloured powders are obtained by milling or grinding together the following mixtures and thereafter separating the liquid component: (a) lamp black or channel black, polyacrylonitrile, water, acetone and monochlorbenzene; (b) Indanthrene Blue, a copolymer of vinyl chloride and vinyl acetate, water, acetone and xylol; (c) phthalocyanine blue, a copolymer of acrylonitrile and vinyl acetate, water, acetone, and monochlorbenzene; (d) as in (c) but replacing the blue pigment by carbon black and adding acetic acid as a neutralizer; (e) carbon black, cellulose acetate, water, acetone, and monochlorbenzene; (f) Phthalocyanine Green, ethyl cellulose, water, acetone and xylol.ALSO:The process of grinding or milling pigment and solid particles of plastic material in the presence of a liquid consisting of water and a water-miscible solvent or swelling agent, described in Specification 699,185, is modified by the addition to the liquid of a minor proportion of a water-immiscible solvent or swelling agent such as xylol or monochlorbenzene.  In examples, coloured powders are obtained by milling or grinding together the following mixtures and thereafter separating the liquid component; (a) lamp black or channel black, polyacrylonitrile, water, acetone and monochlorbenzene; (b) Indanthrene Blue, a copolymer of vinyl chloride and vinyl acetate, water, acetone and xylol; (c) Phthalocyanine Blue, a copolymer of acrylonitrile and vinyl acetate, water, acetone, and monochlorbenzene; (d) as in (c) but replacing the blue pigment by carbon black and adding acetic acid as a neutralizer; (e) carbon black, cellulose acetate, water, acetone, and monochlorbenzene; (f) Phthalocyanine Green, ethyl cellulose, water, acetone and xylol.  The specified plastic materials also include waxes.ALSO:The process of grinding or milling pigment and solid particles of plastic material in the presence of a liquid consisting of water and a water-miscible solvent or swelling agent described in Specification 699,185 is modified by the addition to the liquid of a minor proportion of a water-immiscible solvent or swelling agent such as xylol or monochlor benzene.  In examples, coloured powders are obtained by milling or grinding together the following mixtures and thereafter separating the liquid component: (a) lamp black or channel black, polyacrylonitrile, water, acetone and monochlorbenzene; (b) Indanthrene Blue, a copolymer of vinyl chloride and vinyl acetate, water, acetone and xylol; (c) Phthalocyanine Blue, a copolymer of acrylonitrile and vinyl acetate, water, acetone, and monochlor benzene; (d) as in (c) but replacing the blue pigment by carbon black and adding acetic acid as a neutralizer; (e) carbon black, cellulose acetate, water, acetone, and monochlor benzene; (f) Phthalocyanine Green, ethyl cellulose, water, acetone and xylol.