Silicones fusible rubbers

Nontacky self-adhesive rubbers (fusible rubbers) are obtained if small amounts of boron ( 1 boron atom per 300 silicon atoms) are incorporated into the polymer chain. They may be obtained by condensing dialkylpolysiloxanes end-blocked with silanol groups with boric acid or by reacting ethoxyl end-blocked polymers with boron triacetate. 

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