Shrink-Resisting Wool with Poly(Dimethylsiloxane)-α,ω-Diols and Aminofunctional Silane Crosslinking Agents

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Abstract
An investigation (previous paper) of shrink-resisting wool from perchloroethylene solvent treatments with poly(di methylsiloxane)-α,ω-diols and aminofunctional silane crosslinking agents was continued. A poly(dimethylsiloxane)- a,w-diol of molecular weight 55,000 was crosslinked with polyalkoxysilanes with side-chains containing various functional groups. Effective shrink resistance was only obtained with silanes containing at least two amino groups. Analogues of 3(2-aminoethylamino)-propyltrimethoxysilane with different alkoxy or amino functional groups were synthesized, and both these structural changes were found to influence significantly the development and effectiveness of the shrink resistance.