Nagoya University

Kuraray Co., Ltd.

Sekisui Chemical Co., Ltd.

Yasuhara Chemical Co., Ltd.

Kotaro Satoh

Masami Kamigaito

Koichiro Iwasa

Yuji Eguchi

Shinya Suzuki

Yasuyuki Kori

Hitoshi Shirato

Hiroko Sugiyama

[1] A &#x3b2;-phellandrene polymer which is a polymerization product of &#x3b2;-phellandrene. [2] The &#x3b2;-phellandrene polymer comprising &#x3b2;-phellandrene units represented by chemical formulae (I-1), (I-2), (II-1) and (II-2), a total amount of the &#x3b2;-phellandrene units being 50% by mass or more. [3] The &#x3b2;-phellandrene polymer, which has a number average molecular weight Mn of 40,000 or more. [4] The &#x3b2;-phellandrene polymer, wherein at least a part of olefinic carbon-carbon double bonds thereof are hydrogenated. [5] The &#x3b2;-phellandrene polymer, which has a glass transition temperature of 80&#xb0; C. or more. 

&#x3b2;-phellandrene polymer, production method for same, and molded article

To provide a &#x3b2;-pinene polymer excellent in heat resistance while having thermoplasticity, and further also having excellent strength, without impairing the inherent characteristics of small specific gravity and excellent transparency. A desired &#x3b2;-pinene polymer having a weight average molecular weight of 90,000 to 1,000,000 and a glass transition temperature of 80&#xb0; C. or more was obtained by polymerizing &#x3b2;-pinene in the presence of a bifunctional vinyl compound.

&#x3b2;-pinene polymer and process for producing the same

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Nagoya, Japan

Kotaro Satoh