| abstract |
Disclosed is a method for producing a high purity hydroxy-terminated phenyl ladder polysiloxane, which contains therein 1 ppm or below of each of sodium, potassium, iron, copper, lead and chlorine, and 1 ppb or below of each of uranium and thorium, and is represented by the following general formula (I):n n [where: R₁ and R₂ are each alkenyl group or phenyl group; n is an integer of from 7 to 1600; m and ℓ are natural numbers satisfying relationships of 2n = m + ℓ and ℓ / m + ℓ ≧ 0.02]. n Also disclosed in a method for producing the high purity hydroxy-terminated phenyl ladder polysiloxane. |