Honda Giken Kogyo Kabushiki Kaisha

Achilles Corporation

Idemitsu Petrochemical Co., Ltd.

Tetsuya Oda

Yoshio Sakaguchi

Masashi Ishii

Youichi Matsuo

Ryuzo Tomomatsu

Sigeru Tozune

Kouichi Tane

Katsuya Motojima

Naoki Narukawa

Shizuo Yamazaki

Yasumasa Sawachika

Tetsushi Yamada

Ryuichi Komori

A propylene-based resin composition has good external appearance due to good weld appearance and low gloss and has excellent mechanical properties such as impact resistance and stiffness. The composition is well-balanced in the external appearance and mechanical properties. Automotive interior trims made of the composition are also described. The propylene-based resin composition comprises (A) 60 to 90% by weight of a propylene-based resin (1) comprising 78 to 88% by weight of 23&#xb0; C. p-xylene insolubles (a) and 12 to 22% by weight of 23&#xb0; C. p-xylene solubles (b), (2) the insolubles (a) having an isotactic pentad fraction of 95% or higher, a relaxation time (&#x3c4;) of 0.01 to 0.35 second at an angular frequency (&#x3c9;) of 10&#xb0;/sec when measured by melt viscoelastometry and a molecular weight distribution index (PDI) of 1 to 18 which is expressed by &#x3c9;/10&#x3c9;wherein &#x3c9;is an angular frequency at which a storage modulus (G') as measured by melt viscoelastometry is 2&#xd7;10Pa and &#x3c9;is an angular frequency at which a storage modulus (G&#x2032;) as measured by melt viscoelastometry is 2&#xd7;10Pa, and (3) the solubles (b) having an intrinsic viscosity [&#x3b7;] (in decalin at 135&#xb0; C.) of 3.3 dl/g or higher and an ethylene unit content of 43% by weight or smaller; (B) 0 to 10% by weight of a rubberlike elastomer; and (C) 10 to 30% by weight of tale. The automotive interior trims are produced by injection-molding the composition.

Propylene resin composition and interior automotive member comprising the same

Disclosed herein is a polyurethane foam for cushioning materials. The polyurethane foam is formed by reacting a mixture of a polyol component, a polyisocyanate component and other optional components. The polyol component contains a mixed polyol which is composed of a low-hydroxyl-number polyol having a hydroxyl number of 30-80 and a high-hydroxyl-number polyol having a hydroxyl number of 350-600 and has an average hydroxyl number of 120-170. The mixture may additionally contain a plasticizer component containing at least one kind of plasticizer having one active hydrogen atom per molecule.

Polyurethane foam for cushioning materials

A shock-absorbing polyurethane foam is formed of a polyol component and a polyisocyanate component. The polyol component is a mixed polyol having an average hydroxyl number of 130-250 and composed at least of 20-70 parts by weight of a low-molecular polyol having a molecular weight of 300-500 and 80-30 parts by weight of a high-molecular polyol having a molecular weight of 1,500-8,000 per 100 parts by weight of the whole polyol component. The foam further contains 5-150 parts by weight of a plasticizer having a solidification point not higher than -20.degree. C. per 100 parts by weight of the whole polyol component. The foam can be produced by reacting the polyol component and polyisocyanate component in the presence of 5-150 parts by weight of the plasticizer per 100 parts by weight of the polyol component.

Shock-absorbing polyurethane foam and production process thereof

Growing community of inventors

Wako, Japan

Tetsuya Oda