Process for the production of colored polyolefin molded articles and colorants used therein
AssigneeToyo Ink Manufacturing Co., Ltd.
InventorsHiromitsu Katsura, Morihiko Endo, Takashi Kanno
Life of this patent
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Abstract
A process for the production of a colored polyolefin molded articles comprising adding to a polyolefin either a compound of the formula D--CH.sub.2 O.OC--R]).sub.n as a colorant wherein D is the residue of a common organic pigment, R is an alkyl, alkenyl or aryl group having up to 20 carbon atoms and n is an integer of 1-4, or a mixture of the compound of the above formula with at least one usual pigment, to form a mixture, and then molding the mixture thereby producing the desired colored articles. This invention also relates to the compound of said formula and to a mixture thereof with at least one common pigment.
Claims14
A process for the production of a colored polyolefin molded article comprising adding at least one pigment to a polyolefin to form a mixture and molding the mixture in a mold to produce the colored polyolefin molded article,
- characterized by the fact that said pigment comprises a compound represented by the following general formula [I]
- D--CH.sub.2 O.OC--R].sub.n [I]
- wherein D is the residue of an organic pigment, R is a substituted or non-substituted alkyl, alkenyl or aryl group having up to 20 carbon atoms, and n is an integer of from 1 to 4.
A dimensionally stable, colored polyolefin molding composition comprising 100 parts by weight of a polyolefin and 0.001-15 parts by weight of a pigment represented by the following general formula (I)
- D--CH.sub.2 O.OC--R).sub.n (I)
- wherein D is the residue of a phthalocyanine pigment, R is a substituted or non-substituted alkyl, alkenyl or aryl group having up to 20 carbon atoms, and n is an integer of from 1 to 4.
Dependencies are inferred from the claim text.