Nontoxic polyethoxysiloxane material for the production of biologically resorbable and/or bioactive articles containing polyethoxysiloxane material, the production thereof, and the use thereof
A technology of polyethoxysiloxane and ethoxy, which is applied in the direction of absorbent pads, animal cells, textiles and papermaking, and can solve the problems of removal and loss of a large proportion of spinnable sols
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[0084] Example 1: Bioresorbable and / or bioactive rPES materials (sols) and their processing to form fibers and webs
[0085] As a starting material for the hydrolytic condensation reaction, 2.7 mol (562.4 g) of TEOS (tetraethoxysilane) was precharged into a reaction vessel. 3.4 (2.7 x 1.26) mol of ethanol (156.8 g) was added as solvent. Stir the mixture. H alone 2 O (60.38g) was diluted with 1N nitric acid (27.81g). 89.28 g of this diluted nitric acid was then added to the entire TEOS-ethanol mixture at room temperature, so that the resulting reaction mixture contained 1.8 mol of H per mole of TEOS 2 O and 0.01mol of HNO 3 . The mixture was stirred for 5 hours.
[0086] The mixture obtained after step (a) was then rendered practically free of water and ethanol by applying a vacuum of 500 mbar at 70° C. with slow stirring (20 rpm) in a rotary evaporator (step (b)). The reduced form of NO is significantly reduced by this high temperature 2 HNO 3 . The viscosity of the ...
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