Process for the production of poly(diorganosiloxanes) with diorg

Details Process for the production of poly(diorganosiloxanes) with diorg Process for the production of poly(diorganosiloxanes) with diorg

1996-09-09

1998-03-17

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

528901, C08G 7708

Patent

active

057287945

ABSTRACT:
In the production of a poly(diorganosiloxane) with diorganyloxyorganylsilyl or triorganyloxysilyl end groups wherein at least one .alpha.,.omega.-dihydroxypoly(diorganosiloxane) is reacted with at least one alkoxysilane in the presence of a catalyst, the improvement which comprises employing as the catalyst at least one phosphoric acid ester or salt thereof. The reaction proceeds rapidly and, when complete, the catalyst can easily be deactivated to prevent degradation and/or rearrangement.

REFERENCES:
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DIN 53504, Determination of tensile strength at break, tensile strength, elongation at break and stress values in a tensile test, pp. 1-5, (Mar. 1985).
DIN 53505, Testing of Elastomers Shore A and D Hardness Testing, pp. 1-4, (Aug. 1973).

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