Patent ID: 8709394

Claim:
An antimicrobial polymer-based composition comprising: (A) quaternary amino functionalized cross-linked polysiloxane; and (B) an antimicrobially-effective amount of metal species distributed within the crosslinked polysiloxane; wherein the quaternary amino functionalized cross-linked polysiloxane has a structure corresponding to a reaction product of reactants consisting essentially of alkoxysilyl functionalized quaternary amine and tetra-functional silane and/or trifunctional silane; and silanol terminated polysiloxane having a molecular weight of about 10,000 to 75,000; where the alkoxysilyl functionalized quaternary amine is represented the formula trimethoxysilyl-R′—N + R 1 R 2 R X − in which R′ is ethylene and/or propylene, R 1 and R 2 are methyl, benzyl and/or ethyl, X is chloride and/or bromide, and R is an n-alkyl group having 12 to 20 carbon atoms; and the silanol terminated polysiloxane is represented by the formula R 7 , R 8 , and R 9 are alkyl, A is alkyl and/or alkoxy, n is 0 to 5000, m is 0 to 2000, and n+m are least 10.