| 摘要 |
<p>PURPOSE:To obtain a title stabilizer having fire-resistant and good heat dissipation properties by restricting the contents of unsaturated components in acid fractions in resin, limiting the fractions of the resin acid to tall oil resin aliphatic resin and the amount of the addition thereof, and filling the low burning stabilizer with an unsaturated polyester resin composition with a reduced change in elapsed time of a curing material. CONSTITUTION:There are taken as main ingredients (A) (a) unsaturated polybasic acid with tall oil aliphatic acid taken as a main ingredient and (b) an acid fraction comprising saturated polybasic acid, (B) a polyhydroxy alcohol fraction, (C) a copolymerizable monomer, and (D) an inorganic filler. There is filled a casing with an impedance element housed therein an unsaturated polyester resin composition that contains 15-30 equivalent weight % of the tall oil aliphatic acid with respect to the acid fractions [(A)=(a)+(b)] and 40-60weight% of the same with respect to the resin fractions [(A)+(B)]. Hereby, there is assured good close contact between a casing wall and the composition and a curing material with good flexibility, without producing any crack over a long period of time. Therefore, there is realized the title stabilizer having fire- resistant and stable heat dissipation properties and having high reliability.</p> |
