Title:
POLYAMIDE RESIN COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2019/117072
Kind Code:
A1
Abstract:
Provided is a polyamide resin composition which exhibits excellent impact resistance at low temperatures and excellent blow-molding properties while maintaining a favorable surface appearance as a molded article thereof. A polyamide resin composition which contains 40-85 parts by mass of a polyamide (A) and 10-20 parts by mass of an impact-resistant material (B) in 100 parts by mass of the polyamide resin composition, wherein: the absolute value |Δlog(σ(t))/Δt|[Pa/s] of the stress change rate obtained from the stress σ(t)[Pa] obtained via the following stress relaxation measurement method satisfies formula (1) when the elapsed time t=0.1[s]; and the initial stress σ0[Pa], which is the value when t=0 on a straight line passing through a coordinate A (0.02, σ(0.02)) and a coordinate B (400, σ(400)) represented by formula (3), satisfies formula (4) in a stress relaxation curve obtained by plotting data for the elapsed time t[s] and the stress σ(t)[Pa] obtained via said stress relaxation measurement method in a manner such that elapsed time t is expressed logarithmically on the x-axis and stress σ(t) is expressed logarithmically on the y-axis. [Stress relaxation measurement method] The stress σ(t)[Pa] at an elapsed time t[s] is measured after sandwiching a specimen in a measurement cell, loading strain while melting the specimen under the following conditions, and then stopping the loading. Measurement cell: parallel plates (Φ25mm). Distance between parallel plates: 1.5mm. Melting temperature conditions: 250°C. Loaded strain: 100%.
Inventors:
YAMASHITA ATSUSHI (JP)
YASUI TETSUYA (JP)
YASUI TETSUYA (JP)
Application Number:
PCT/JP2018/045270
Publication Date:
June 20, 2019
Filing Date:
December 10, 2018
Export Citation:
Assignee:
UBE INDUSTRIES (JP)
International Classes:
C08L77/00; B29B11/10; B29C49/00; B29C49/04; C08K5/524; C08L23/08; C08L23/14; F17C1/16
Domestic Patent References:
| WO2017135215A1 | 2017-08-10 | |||
| WO2016136025A1 | 2016-09-01 |
Foreign References:
| JP2007204674A | 2007-08-16 | |||
| JP2017206639A | 2017-11-24 | |||
| JP2018199762A | 2018-12-20 | |||
| JP2007204675A | 2007-08-16 | |||
| JP2006523763A | 2006-10-19 |
Other References:
See also references of EP 3725848A4
Attorney, Agent or Firm:
TSUKUNI & ASSOCIATES et al. (JP)
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