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Flame-retardant injection-molded object

A technology for injection molding products and flame retardancy, which is applied in the field of injection molding products with flame retardant properties, and can solve problems such as reducing the heat resistance of injection molding products.

Inactive Publication Date: 2008-11-19
SONY CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the impact resistance improver is used as a plasticizer, there is a problem of reducing the heat resistance of injection molded products

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0023] The flame-retardant injection-molded article related to the first embodiment of the present invention is a flame-retardant injection-molded article formed from a resin composition comprising a lactic acid resin (A), the surface of which has been treated with a silane coupling agent Metal hydroxide (B) and copolymer (C) of lactic acid resin and diol / dicarboxylic acid.

[0024] (Lactic acid resin (A))

[0025] As the lactic acid resin used in this embodiment, poly(L-lactic acid) having L-lactic acid as a structural unit, poly(D-lactic acid) having D-lactic acid as a structural unit, or poly(D-lactic acid) having L-lactic acid and D-lactic acid as a structural unit can be used. Poly(DL-lactic acid) with lactic acid as a structural unit, or a mixture comprising a combination of two or more of said substances.

[0026] The DL composition ratio of the lactic acid resin used in this embodiment is preferably L isomer:D isomer=100:0-90:10 or L isomer:D isomer=0:100-10:90, More...

no. 2 approach

[0081] The flame-retardant injection-molded article of the second embodiment of the present invention is a flame-retardant injection-molded article formed from a resin composition that does not contain component (C) in the first embodiment, but further contains excluding lactic acid One or both (D) of an aliphatic polyester other than a resin and an araliphatic polyester, and an ester compound (E) having a molecular weight of 200-2000. That is, this flame-retardant injection molded article is formed from a resin composition comprising a lactic acid resin (A), a metal hydroxide (B) whose surface has been treated with a silane coupling agent, a lactic acid-removed A biodegradable polyester resin (D) other than a resin, and an ester compound (E).

[0082] When metal hydroxides are mixed into injection molded products, although the flame retardancy is improved, the metal hydroxides become fracture origins, reducing impact resistance. However, by mixing together an ester compound ...

Embodiment 1

[0159] Nature Works 4032D (L-lactic acid D-lactic acid=98.6 / 1.4, average molecular weight: 200,000) produced by Cargill Dow was used as the lactic acid resin (A), and BFO13ST produced by Nippon Light Metal Company, Ltd. (coupling with epoxysilane Agent-treated aluminum hydroxide, average particle size: 1 μm) As the epoxy metal hydroxide (B), Plamate PD-150 (copolymer of polylactic acid and propylene glycol / sebacic acid; poly(lactic acid) produced by Dai Nippon Ink and Chemicals Incorporated; Lactic acid: 50 mol%; Propylene glycol: 25 mol%; Sebacic acid: 25 mol%; Average molecular weight: 100,000) as the copolymer (C) of lactic acid resin and diol / dicarboxylic acid.

[0160] After dry blending Nature Works 4032D, BFO13ST, and PlamatePD-150 at a mass ratio of 65:25:10, they were mixed at 180° C. using a small-sized 40 mmФ co-rotating twin-screw extruder produced by Mitsubishi Heavy Industries Co., and Made into pellets. A plate of 200 mm length x 3 mm width x 3 mm or 4 mm thick...

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Abstract

A flame-retardant injection-molded object which not only has flame retardancy but combines impact resistance with heat resistance. The flame-retardant injection-molded object is formed from a resin composition which comprises given amounts of: (A) a lactic acid resin; (B) a metal hydroxide whose surface has been treated with a silane coupling agent; and (C) a copolymer of a lactic acid resin and a dioldicarboxylic acid. Alternatively, the injection-molded object is formed from a resin composition which comprises given amounts of: the ingredient (A); the ingredient (B); (D) one or both of an aliphatic polyester other than lactic acid resins and an araliphatic polyester; and (E) an ester compound having a molecular weight of 200 to 2,000.

Description

technical field [0001] The present invention relates to an injection molded article comprising a lactic acid resin as a main component, and in particular, to an injection molded article having flame retardancy. Background technique [0002] Plastic has entered many fields of life and industry, and its worldwide production has reached about 100 million tons per year. However, most plastics are discarded after use, which has been identified as a cause of damage to the global environment. Therefore, efficient use of available resources has been recognized as the most important event in recent years, and the use of renewable resources has become an important topic. [0003] At present, the use of plastics derived from plant raw materials (biodegradable) has attracted attention as a solution to this problem. Plastics from plant raw materials not only allow the use of non-depleting resources but also the saving of exhaustible resources in the production of plastics which also ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08K5/10C08K9/06B29C45/00B29C45/76B29K67/00C08L67/00C08L101/16
Inventor 山田心一郎森浩之藤平裕子田中一也高木润加藤幸男
Owner SONY CORP
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