Method for preparation of very high molecular weight polycarbora

Details Method for preparation of very high molecular weight polycarbora Method for preparation of very high molecular weight polycarbora

1991-12-16

1993-05-04

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From boron reactant having at least one boron to hydrogen or...

528 34, 528 41, C08G 7756

Patent

active

052083101

ABSTRACT:
An improved method for the preparation of very high molecular weight polycarborane siloxane polymers in which each of the reactants is first provided in an ultra-pure state by a series of recrystallization procedures in specific solvents. The reactants are then reacted in the following series of steps by:

REFERENCES:
patent: 3445427 (1969-05-01), Larchar, Sr.
patent: 3733298 (1973-05-01), Knollmueller
Stewart et al, "D2-m-Carborane Siloxanes. 7. Synthesis and Properties of Ultra-High Molecular Weight Polymer," Macromolecules, vol. 12, No. 3, May-Jun. 1979, pp. 373-377.

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