Polyamide thermoplastic elastomer composition and molded article thereof

A thermoplastic elastomer, polyamide-based technology, applied in the field of polyamide-based thermoplastic elastomer compositions and their molded products, and molded products obtained by injection molding or blow molding, can solve the problem of reduced flexibility, clogging in pipes, fuel , the problem of insufficient alcohol permeation resistance, etc., to achieve the effect of excellent moldability and excellent rubber elasticity

Active Publication Date: 2016-08-24
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, molded products using nylon 11 and nylon 12 are excellent in toughness, chemical resistance, and flexibility, but are not sufficiently resistant to fuel and alcohol permeation.
Therefore, it becomes difficult to cope with the control of fuel gas evaporation surrounding automobiles in recent years
Furthermore, plasticizers such as butylbenzenesulfonamide (BBSA) added to soften the tubes may be extracted into the fuel, causing clogging in the tubes or reducing the flexibility of the tubes themselves.

Method used

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  • Polyamide thermoplastic elastomer composition and molded article thereof
  • Polyamide thermoplastic elastomer composition and molded article thereof
  • Polyamide thermoplastic elastomer composition and molded article thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0202] Hereinafter, the present invention will be further specifically described by way of examples.

[0203] First, a production example of the polyamide used will be described.

[0204] Polyamide [I-1]: (6T6I66=50 / 35 / 15)

[0205] Dicarboxylic acid component = 50% by mass of terephthalic acid, 35% by mass of isophthalic acid, and 15% by mass of adipic acid

[0206] Diamine component = 1,6-hexanediamine

[0207] Melting point (Tm) = 276°C

[0208] Proportion of terminal groups blocked by blocking agent (benzoic acid) = 79%

[0209] The amount of amino groups at the end of the molecular chain = 21mmol / kg

[0210]This polyamide [I-1] was synthesized as follows. 1986g (12.0 moles) of terephthalic acid, 2800g (24.1 moles) of 1,6-hexanediamine, 1390g (8.4 moles) of isophthalic acid, 524g (3.6 moles) of adipic acid, 36.5g (0.3 moles) of benzoic acid ), 5.7 g of sodium hypophosphite monohydrate (0.08% by mass relative to the raw material), and 545 g of distilled water were char...

manufacture example Y-2～Y-7

[0345] Except for changing the type of polyamide [I] used and the compounding ratio of each component as shown in Table 4, pellets were produced in the same manner as in Production Example Y-1, and the measurement of the flexural modulus was performed. The results are shown in Table 4.

[0346] [Table 4]

[0347]

[0348] [Bending modulus of elasticity]

[0349]Using an injection molding machine (manufactured by Sodick Plustech Co., Ltd., device name Tuparl TR40S3A), injection molding was performed under the conditions of cylinder temperature [melting end temperature (T) + 10] °C and mold temperature of 40 °C to produce a test piece with a thickness of 3 mm. The test piece was further left at a temperature of 23° C. under a nitrogen atmosphere for 24 hours. Next, a bending test was performed on the test piece at a temperature of 23° C. and a relative humidity of 50% using a bending tester (manufactured by NTESCO, device name AB5) at a pitch of 51 mm and a bending speed of...

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Abstract

The present invention relates to: a rubber composition [X] containing a polyamide [I] of 30-100 mol% terephthalic acid structural units having a melting point of 220-290DEG C, an ethylene-alpha-olefin-unconjugated polyene copolymer rubber [II] containing ethylene, alpha-olefin having 3-20 carbon atoms, and unconjugated polyene structural units, and an olefin polymer [III] containing 0.3-5.0 mass% functional group structural units; and a polyamide thermoplastic elastomer composition [Y] dynamically crosslinked by a phenolic resin crosslinking agent [IV] ([I]-[IV] are a total of 100 mass%).

Description

technical field [0001] The present invention relates to a polyamide-based thermoplastic elastomer composition excellent in rubber elasticity and moldability, and a molded article thereof. [0002] In addition, the present invention relates to a polyamide-based thermoplastic elastomer composition having excellent high-temperature elasticity retention, oil resistance, and moldability, and molded articles obtained from the composition by injection molding or blow molding (for example, for automobiles). constant velocity joint dust cover). [0003] Furthermore, the present invention relates to a polyamide-based thermoplastic elastomer composition, which is a resin composition for industrial pipes, and an industrial pipe having at least a layer containing the composition, and has a flexibility , Excellent impact resistance, fuel, solvent permeation prevention, swelling resistance. Background technique [0004] Thermoplastic elastomers are recyclable rubber materials, and resear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08L23/16C08L23/26C08L61/06C08L77/06
CPCC08L77/06F16L11/04C08J3/246C08J2323/08C08J2377/00C08J2423/08C08J2477/00C08L23/16C08L61/06C08L23/26F16D3/84F16J15/52C07C63/24C07C63/26C08G69/26C08L2312/04G01N25/20
Inventor 江端洋树榎本龙弥鹫尾功影山文雄武石敦石井雄二天野晶规
Owner MITSUI CHEM INC
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