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...
Reexamination Certificate
2000-09-14
2002-02-05
Sanders, Kriellion A. (Department: 1714)
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...
C524S464000, C524S315000, C524S539000, C525S437000
Reexamination Certificate
active
06344508
ABSTRACT:
TECHNICAL FIELD
No. I invention in the present invention relates to a regeneration of a PET, and it relates to a regenerated PET resin composition in which there is improved a molding processability such as an injection moldability and extrusion processability, and a molded article therefrom. Further, No. II invention in the present invention relates to a thermoplastic resin composition containing a flame retardant and a molded article therefrom, in more detail, it relates to a flame retardant resin composition in which bleeding of the flame retardant is suppressed without a decline of flame retardancy, and a molded article therefrom.
BACKGROUND TECHNOLOGY
Thermoplastic resins are produced in a large amount because those are light and tough, excellent in water resistance, chemical resistance, and an electric insulation property, and easy in molding and processing. Particularly, a polyethylene terephthalate which is usually called a PET is mass-produced as bottles for beverages because it is light and tough and, further, excellent in transparency. Recently in Japan, Recycling Law for Vessels and Wrapping materials is enforced, and there is proceeded a measure of a shift to a recycling society in relation to plastics. Further, recycling of PET bottles is desired because of a worldwide trend.
However, since the regenerated PET resin includes a problem of a poor moldability, it is difficult to obtain a molded article by an injection molding method which is usually employed for general-purpose resins such as a polyolef in resin. For that reason, there is limited a use of the regenerated PET, and regeneration of PET is not progressed. Further, since the regenerated PET resin is a crushed resin from recollected bottles for beverages, textiles, and films, etc., it is usually unsettled in shapes and a flake-state, whereby, it is bulky and worse in transport efficiency.
Accordingly, it is desired that the regenerated PET resin is pellet-state in consideration of transport efficiency.
However, since moldability is poor, it is difficult to prepare uniform pellets. It is an existing circumstance that there are not methods by which there can be solved the above-described various problems in the regenerated PET resin.
The No. I invention in the present invention aims to provide a regenerated PET resin composition in which there is improved a molding processability such as an injection moldability and extrusion moldability, and to provide a molded article therefrom.
Further, since thermoplastic resins are light and tough, excellent in water resistance, chemical resistance, and an electric insulation property, and easy in molding and processing, those are employed in a wide range such as construction materials, materials for electric equipments, parts for cars, internally decorative materials for cars, covering materials for electric cables, parts for precise machines, other various industrial materials, and household goods, etc. However, since the thermoplastic resins have a drawback of readily burning, there are proposed many methods for flame retardation of the thermoplastic resins. As such the methods for flame retardation, there is a method in which a flame retardant is added to the thermoplastic resins, and which is most popular.
However, the flame retardant resin composition containing the flame retardant includes a problem that the flame retardant oozes out (it is to be noted that oozing out of a liquid flame retardant is occasionally called a bleeding, and oozing out of a solid flame retardant is occasionally called a blooming, however, in the present specification, a phenomenon of oozing out in the flame retardant is merely called bleeding regardless of kinds of the flame retardant) when it is stored at high temperature for a long time of period, and it makes an outer appearance of a final product worse.
Further, since the flame retardant oozes out onto surface of resins by bleeding of the flame retardant, it is becoming problematic from a hygienic viewpoint because the flame retardant adheres to a human body in handling the final product.
A variety of methods are proposed for solving the above-described problems. For example, although there are reported a method (JP-A-06299007 Official Gazette) in which a specified compound is mixed with a polyolefin resin and a method (JP-A-07053796 Official Gazette) in which inorganic fillers are formulated in a crystalline propylene polymer containing a halogen-contained flame retardant and an auxiliary agent for the flame retardant. However, it is an existing circumstance that the both methods are not satisfied in an effect for suppressing bleeding of the flame retardant.
Therefore, the No. II present invention aims to providing a flame retardant resin composition in which bleeding of a flame retardant is suppressed without allowing to lower a flame retardancy, and to providing a molded article therefrom.
Hereinafter, the No. I and No. II inventions are separately illustrated.
DISCLOSURE OF THE INVENTION
The inventors of the present invention, as a result of an intensive investigation for solving the above-mentioned problems in the No. I invention, found out that the above-mentioned problems can be effectively solved by mixing a specified amount of an organic ester compound for regenerating a PET resin, and attained to the invention.
That is, the No. I invention relates to a regenerated PET resin composition which comprises 100 parts by weight of a regenerated PET resin (A) and 0.5-100 part by weight of a lactone polymer (B). The present invention further relates to a regenerated PET resin composition further containing a polyolefin resin (C).
The present invention relates to a regenerated PET resin composition further containing other additives (D) composed of an inorganic compound or an organic compound. The present invention relates to a regenerated PET resin molded article which comprises molding the regenerated PET resin composition.
The inventors of the present invention, as a result of an intensive investigation for solving the above-mentioned problems in the No. II invention, found out that the above-mentioned problems can be effectively solved by mixing a specified amount of a polyester resin, and attained to the invention.
That is, the No. II-1 of the invention (hereinafter, referred to “II-1 invention”) relates to a flame retardant resin composition in which there are contained 100 parts by weight of a thermoplastic resin and 0.5-100 part by weight of a flame retardant which comprises mixing 100 parts by weight of a flame retardant (F) with 1-200 part by weight of a mixture composed of a polyester resin (G) and an ester compound (H) of a polyglycerine or glycerine with a higher fatty acid. Further, it relates to a flame retardant resin composition further containing an additive (I) consisting of at least one inorganic compounds, organic compounds, or other additives for resins in the above-described composition. Still further, it relates to a flame retardant resin composition in which a mixing weight ratio is (G):(H)=85-99.5:0.5-15 (total of both weight ratio is 100) in a mixture composed of the above-described polyester resin (G) and ester compound (H) of a polyglycerine or glycerine with a higher fatty acid.
Particularly, it relates to a flame retardant resin composition in which the flame retardant (F) is composed of at least any one kind of a bromine-based flame retardant, a chlorine-based flame retardant, a phosphorus-based flame retardant, a phosphate-based flame retardant, a polyphosphoric acid-based flame retardant, a nitrogen compound-based flame retardant, or an inorganic-based flame retardant. Further, it relates to a resin composition in which the polyester resin (G) is an aliphatic or aromatic polyester resin. Still further, it relates to a resin composition in which the aliphatic polyester resin is a lactone polymer (B).
Also, it relates to a flame retardant resin composition in which the ester compound (H) of a polyglycerine or glycerine with a higher fatty acid is at least any one of a monoglyceride, diglycerid
Endo Shunichi
Miho Takuya
Mizutani Yoshinobu
Ochiai Genichiro
Okumura Koichi
Daicel Chemical Industries Ltd.
Morgan & Finnegan L.L.P.
Sanders Kriellion A.
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