Polyamide copolymers
AssigneeKuraray Co., Ltd.
InventorsYukiatsu Komiya, Masao Ishida, Koji Hirai, Setuo Yamashita, Shinji Komori, Takuji Okaya
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Abstract
Novel polyamide copolymers having skeletons of a specific structure are disclosed. The polyamide copolymers have excellent resistance to hydrolysis, low temperature characteristics (low temperature softness), heat aging resistance and mechanical properties as compared to conventional polyamide copolymers. The polyamide copolymers also show excellent efficiencies in fabrication properties and transparency. In particular, the polyamide copolymers having a branched structure in the molecule thereof provide good results.
Claims8
A polyamide copolymer, comprising repeating units having the formulae (I) and (II) described below wherein a repeating unit of the formula (II) is contained therein in an amount of at least 10 mol. %, said polyamide copolymer having a number average molecular weight of 5,000 to 250,000:
- ##STR7## wherein R.sub.1, R'.sub.1 and R.sub.2, which are the same or different, each represents a hydrocarbon residue and A represents a segment containing at least 30 mol. % of a repeating unit of the formula (VI) described below:
- ##STR8## wherein R.sub.4 represents a combination of a branched hydrocarbon residue and a linear hydrocarbon residue.
Dependencies are inferred from the claim text.