Antimicrobial polysiloxane materials containing metal species
AssigneeNDSU Research Foundation
InventorsBret Ja Chisholm, Partha Majumdar
Life of this patent
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Abstract
Polysiloxane-based materials, which include metal species, are provided. The polysiloxane-based compositions and materials generally include (i) amino-functional polysiloxane material and (ii) a plurality of metal species distributed within the polymeric material. Polymer based compositions in which the amino-functional polysiloxane material includes quaternary ammonium groups, e.g., tetraalkyl ammonium groups, are examples of suitable materials which may be used to form the present compositions. The metal species, which may be in an oxidized and/or neutral state, may be bonded, coordinated, chelated, suspended, and/or dispersed within the polymeric material.
Claims19
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+R1R2R X−
- in which R′ is ethylene and/or propylene, R1 and R2 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
- R7, R8, and R9 are alkyl, A is alkyl and/or alkoxy, n is 0 to 5000, m is 0 to 2000, and n+m are least 10.
An antimicrobial polymer-based composition comprising:
- (A) quaternary amino functionalized cross-linked polysiloxane;
- and
- (B) an antimicrobially-effective amount of silver species distributed within the 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;
- wherein the alkoxysilyl functionalized quaternary amine is represented by the formula
- trimethoxysilyl-R′—N+R1R2R X−
- in which R′ is ethylene and/or propylene, R1 and R 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
- R7, R8, and R9 are alkyl, A is alkyl and/or alkoxy, n is 0 to 5000, m is 0 to 2000, and n+m are least 10.
Dependencies are inferred from the claim text.