Biostatic polymer formed articles

摘要

Compositions comprising a polyvinyl alcohol in combination with a biocide which is a plasticizer, such as a quaternary ammonium compound, or in combination with a biocide and a compatible plasticizer, and wherein the biocide forms a complex with the polyvinyl alcohol, said combination having been heated to above its melting point, said composition having a surface which remains biostatic or biocidal for at least 7 days. A hot melt of the composition may be cast or applied as a film or coating or may be extruded molded or otherwise into articles. Volatiles formed during heating may be removed from the combination e.g. by low pressure.

主权项

1. A composition in the form of a solidified melt, wherein the composition is formed by heating to a temperature in the range of from 140° C. to 220° C. in the absence of a solvent to form a melt and wherein the composition has a surface which remains biostatic or biocidal for at least 7 days, the composition comprising:
from 20 to 96% by weight of the composition of a polyvinyl alcohol, wherein the structure of the polyvinyl alcohol is represented by the following structure:
—CH2CHOH(CH2CHOH)m— where m is an integer greater than 0 and; from 0.5 to 75% by weight of the composition of a biocide given by the formula: wherein R′, R′″, R″, and R″″ are alkyl radicals that are the same or different, substituted, aryl substituted alkyl unsubstituted, branched, unbranched, cyclic, or acyclic and X is an anion, wherein the biocide is a plasticizer, and wherein the biocide forms a complex with the polyvinyl alcohol.