54—A COMPARISON OF DIFFERENT METHODS OF CROSS-LINKING SILICONES ON WOOL FOR SHRINK-RESIST FINISHES

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Abstract
An investigation is reported in which various methods of cross-linking dimethylpolysiloxanes on wool were compared. Several systems imparted shrink-resistance, and the most effective are shown to be (a) mixtures of polymers with terminal silanol groups and amino-functional silane coupling agents, and (b) epoxy-functional dimethylpolysiloxanes cross-linked with polyamines. Some cross-linking methods led to the formation of coherent films but did not cause wool to become shrink-resistant. The presence of polar groups in the cross-linked polymer appeared to be necessary for effective shrink-resistance.

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