Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1995-05-15
1997-12-09
Cain, Edward J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C08L 900
Patent
active
056962002
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field Of The Invention
The present invention relates to a coloring composition (i.e., decorating composition). More particularly, the present invention is concerned with a coloring composition comprising (1) a crosslinked block copolymer comprising molecular chains of a base block copolymer comprising at least one polymer block (A) comprised mainly of vinyl aromatic monomer units, and at least one polymer block (B) comprised mainly of conjugated diene monomer units, the molecular chains of the base block copolymer being crosslinked through a crosslinkage containing at least one linkage selected from the group consisting of an imide linkage, an amide linkage, an ester linkage and a urethane linkage; and (2) at least one colorant selected from the group consisting of an organic pigment, an inorganic pigment and an organic dye, and wherein the coloring composition has a gel content of 60% by weight or more. The present invention is also concerned with a colored thermoplastic resin composition comprising a thermoplastic resin and the above coloring composition (decorating composition), and is further concerned with a colored shaped thermoplastic resin article produced from the colored thermoplastic resin composition. The coloring composition of the present invention has excellent properties, such as melt adhesion properties with a thermoplastic resin, thermal stability and morphological stability. Therefore, by subjecting a thermoplastic resin composition containing the coloring composition of the present invention to molding, such as injection molding, various colored shaped thermoplastic resin articles having not only a highly decorative, distinct spot pattern, such as a stone grain pattern, but also excellent mechanical strength, can be obtained. Examples of such shaped resin articles include exterior parts of household electrical appliances and office automation machines, and the main bodies of articles of furniture, lavatory equipment, bathtubs, and musical instruments.
2. Discussion Of Related Art
Various techniques have conventionally been proposed for producing a shaped article of a thermoplastic resin having a decorative coloration, such as a spot pattern or a stone grain pattern. As a technique for producing a shaped resin article having a spot pattern, Unexamined Japanese Patent Application Laid-Open Specification No. 49-17831/1974 discloses a method in which mica particles as a decorating agent and a short-fibrous material as a reinforcing agent are dispersed into a thermoplastic resin. As a technique for producing a shaped resin article having a stone grain pattern, Unexamined Japanese Patent Application Laid-Open Specification No. 2-153971/1990 discloses a method in which colored aluminum particles are dispersed in a specific amount into a resin. As a technique for producing a shaped resin article having a wood grain or stone grain pattern, Unexamined Japanese Patent Application Laid-Open Specification No. 55-142613/1980 discloses a method in which a colored, graft-modified polyphenylene ether resin as a decorating agent is incorporated into a resin to be molded, and the resultant colored resin composition is subjected to injection molding at a specific temperature. Unexamined Japanese Patent Application Laid-Open Specification No. 50-105760/1975 discloses a method in which a crosslinked polymer is used as a decorating agent, specifically, a method in which particles of a polymer which has been crosslinked by using divinylbenzene are used as a stone grain patterning agent for stone grain-patterning a polymethyl methacrylate resin (PMMA resin). Unexamined Japanese Patent Application Laid-Open Specification No. 2-103254/1990 discloses a technique for providing a stone grain-patterned resin composition containing a stone grain patterning agent comprised of a particulate epoxy resin which has been cured by using a non-amine curing agent and which contains a dye and pigment. Unexamined Japanese Patent Application Laid-Open Specification No. 3-200841/1991 (corresponding
REFERENCES:
patent: 5151324 (1992-09-01), Hanatani et al.
patent: 5536772 (1996-07-01), Dillman et al.
Maeda Mutsumi
Yasui Takeshi
Asahi Kasei Kogyo Kabushiki Kaisha
Cain Edward J.
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