Toyoda Gosei Co., Ltd.

Satoshi Ohta

Masahiro Takimoto

Yoshio Yamazaki

Haruyasu Mizutani

Mashiro Takimoto

A boot for an automobile comprises two terminal annular parts and a barrel part intervening between the two terminal annular parts. This boot is obtained by injection molding a flexible PVC material. The flexible PVC material of one type (I) is composed of a polymer component and a plasticizer, which polymer component is obtained by blending high polymerization degree and low polymerization degree PVC's respectively having an average polymerization degree in specific ranges, with the mixing ratio of the two PVC's being in a specific range. The flexible PVC material of the other type (II) is composed of a polymer component and a plasticizer, which polymer component is obtained by blending a cross-linked resin having a non-gel component average polymerization degree and a cross-linking degree in respectively specific ranges with a non-cross-linked resin having an average polymerization degree in a specific range, with the mixing ratio of the two PVC's in a fixed range. The boot formed of the material of Group I or II incurs no layer separation even after a heat resisting test and induces no bleeding even after a light resisting test. The boot formed of the material of Group II acquires delustered appearance even when the metal die has not been treated by honing in advance.

Boot for automobile

A steering wheel is described, which comprises a core that is covered with a synthetic resin covering material which is overlaid with a coating film thereon, wherein said covering material is formed using an injection molding method by a resin composition that comprises 100 parts by weight of a polyvinyl chloride resin, 100 to 200 parts by weight of a phthalic acid ester based plasticizer represented by formula (I) and 10 to 40 parts by weight of an acrylonitrile-butadiene rubber: ##STR1## wherein R.sub.1 and R.sub.2 are each an alkyl group, provided that when the total number of mols of R.sub.1 and R.sub.2 is 100 mol, a monomethyloctyl group is present in an amount of 10 to 60 mols, while a dimethylheptyl group is present in an amount of 30 to 70 mols.

Steering wheel

A steering wheel for automobiles in which the coated part of the rim core bar comprises a soft foam with a skin layer. The soft foam with a skin layer result from expansion molding of a polyvinyl chloride plastisol. The polyvinyl choride plastisol is prepared by blending a paste resin with a plasticizer, a stabilizer, an expanding medium and other subsidiary materials.

Steering wheel for automobile

A steering wheel is disclosed, which is produced by injection molding a resin composition comprising (i) a crosslinked vinyl chloride polymer having a gel fraction of at least 20% and a non-gelled portion having an average polymerization degree of from 2000 to 3000, (ii) a non-crosslinked vinyl chloride homopolymer having an average polymerization degree of from 800 to 1000, and (iii) a liquid plasticizer, wherein the weight ratio of polymer component (i) to polymer component (ii) is from 50/50 to 80/20 and (iii) the amount of liquid plasticizer is from 70 to 130 parts by weight per 100 parts by weight of the total amount of the two polymers (i) and (ii). The steering wheel has excellent properties with respect to uniformity in matte surface, wear resistance and lightfastness.

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Aichi, Japan

Satoshi Ohta