Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate
2006-05-02
2006-05-02
Hightower, P. Hampton (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
C528S332000, C528S335000, C528S336000, C528S347000
Reexamination Certificate
active
07038006
ABSTRACT:
A polyamide obtained by polycondensation of a diamine component containing at least 50 mol % of 2-methyl-1, 5-pentanediamine and a dicarboxylic acid component containing at least 50 mol % of azelaic acid,comprising the following properties of (1) to (4),(1) when a stretched film is polarized in an electric field of 200 MV/m, a remanent polarization is at least 30 mC/m2,(2) the relative viscosity of a 1 g/dl solution of the polyamide in 96% concentrated sulfuric acid at 25 ° C. is 1.3 to 5.0,(3) the glass transition temperature is 80° C. or less and a calorific value at a cooling crystallization exotherm peak is 5 J/g or less, and(4) it is soluble in an amount of at least 5 mass % at 25 ° C. in at least one selected from methanol, ethanol and 2-propanol,and a resin composition containing the above polyamide and an electrically conductive material.
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Hayashi Takeo
Ogawa Shun
Yoshinaka Satoshi
Hampton Hightower P.
Mitsubishi Gas Chemical Company Inc.
Wenderoth , Lind & Ponack, L.L.P.
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