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
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[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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