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Process for the preparation of flame retardant thermoplastic elastomer compositions

A thermoplastic elastomer and composition technology, which is applied in the field of preparing flame-retardant thermoplastic elastomer compositions, can solve the problems of mold contamination, deterioration of fluidity and molding processability, and deterioration of softness and mechanical properties of molded products.

Active Publication Date: 2019-03-01
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, blending a large amount of a flame retardant into a thermoplastic elastomer composition containing a mineral oil-based softener causes problems of deterioration of fluidity and molding processability, problems of deterioration of flexibility and mechanical properties of molded articles obtained from the composition , and the problem of mold staining when the composition is injection molded

Method used

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  • Process for the preparation of flame retardant thermoplastic elastomer compositions
  • Process for the preparation of flame retardant thermoplastic elastomer compositions
  • Process for the preparation of flame retardant thermoplastic elastomer compositions

Examples

Experimental program
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Effect test

Embodiment 1

[0199] (Preparation of Flame Retardant Thermoplastic Elastomer Composition)

[0200] By using a twin-screw extruder at 200±10° C., the following materials were kneaded to obtain a thermoplastic elastomer composition precursor: 87.4% by weight of oil-extended ethylene-α-olefin-based copolymer rubber ((A1)+(C) ), 12.6% by weight of propylene-based polymer (A2), and high-density polyethylene (trade name "HI-ZEX1300J", produced by Prime Polymer Co., Ltd. (density=961kg / m 3 , MFR=13g / 10min), the amount of the high-density polyethylene is 2.9 parts by weight / 100 parts by weight of the sum of oil-extended ethylene-α-olefin copolymer rubber and propylene polymer.

[0201] Next, by using a twin-screw extruder at 200±10° C., the following were kneaded (in other words, dynamically crosslinked) to obtain a thermoplastic elastomer: 100 parts by weight of the resulting thermoplastic elastomer composition precursor, 3.2 parts by weight of Crosslinking agent (D1), 0.3 parts by weight of cros...

Embodiment 2

[0204] (Preparation of Flame Retardant Thermoplastic Elastomer Composition)

[0205] Operation was performed in the same manner as in Example 1, except that the loading of the halogen-free flame retardant (E2 / F1) was changed to 42.6 parts by weight and 0.7 parts by weight of zinc oxide (F1) was further added. The results of physical property measurement are shown in Table 1.

Embodiment 3

[0207] (Preparation of Flame Retardant Thermoplastic Elastomer Composition)

[0208] Operations were performed in the same manner as in Example 1, except that 2.9 parts by weight of the thermoplastic resin having a polar group (G1-2) was added instead of the thermoplastic resin having a polar group (G1-1). The results of physical property measurement are shown in Table 1.

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Abstract

The present invention provides a flame-retardant thermoplastic elastomer composition, from which it is possible to prepare a thermoplastic elastomer composition having mechanical properties, flame retardancy, and flexibility inherent in a molded article obtained from a thermoplastic elastomer composition containing a mineral oil-based softener and a flame retardant Molded articles, and it does not stain the mold after injection molding. The present invention discloses a method comprising the following steps: in the presence of a mineral oil-based softener (C) and a crosslinking agent (D), the ethylene-α-olefin-based copolymer rubber (A1) and the propylene-based polymer ( The step (1) of obtaining a thermoplastic elastomer composition by dynamic crosslinking of the polymer mixture (A) of A2), and the thermoplastic elastomer composition, a halogen-free flame retardant (E), zinc oxide (F) and a The step (2) of kneading the thermoplastic resin (G) of the sexual group, wherein the amount of each component satisfies the condition (p) at the start of the dynamic crosslinking of the step (1) and at the start of the kneading of the step (2) The amount of each component satisfies the condition (q).

Description

technical field [0001] The present invention relates to a process for the preparation of flame retardant thermoplastic elastomer compositions. Background technique [0002] Olefin-based thermoplastic elastomer compositions have been widely used in automobile interior parts, automobile exterior parts, motor parts, household appliance parts, packaging members, agricultural materials, construction members, etc., because they can be conventionally used for molding thermoplastic resins Machined and recycled, and they are soft (see Patent Document 1). However, since thermoplastic elastomer compositions are combustible materials, in the use of such thermoplastic elastomer compositions for applications requiring flame retardancy, it is necessary to use the thermoplastic elastomer composition after making it flame-retardant. [0003] Known methods for flame-retardant synthetic resins include adding inorganic phosphorus-based flame retardants represented by red phosphorus and phospha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L23/12C08L23/06C08K13/02C08K5/14C08K3/32C08K3/22C08K5/053
CPCC08L23/0815C08L2201/22C08L2201/02C08L2205/035C08L2205/025C08K2201/014C08L2207/062C08L2207/04C08L23/14C08L23/06C08L23/0869C08K13/02C08K5/14C08K5/103C08K2003/321C08K2003/2296C08K5/053C08L61/06C08J2323/08C08L23/16C08L2312/02C08L23/12C08L23/0846C08L61/02C08J3/203C08J2319/00C08J2423/12C08L19/00
Inventor 黑川良介夏山延博
Owner SUMITOMO CHEM CO LTD