HAYSON, KIMBERLY, S,HOFFMAN, WILLIAM, C,JOSEPH, ALBERT, F,KEEN, BRIAN, T
申请号：
NZ59055309
公开号：
NZ590553A
申请日:
2009.03.12
申请国别(地区):
NZ
年份:
2012
代理人:
摘要：
Disclosed is a method of treating biodegradable material with a metal biocide, such as wood or other starch based products, to prevent attack by insects, fungi or microbes. The method involves: a) providing the biodegradable substrate, said substrate comprising (i) a first substrate region distal from a surface of the substrate, said first substrate region having a first concentration of a metal biocide and (ii) a second substrate region proximal to the surface of the substrate, said second substrate region having a second concentration of metal biocide that is reduced relative to the first substrate region and b) contacting the surface of the substrate with an aqueous, fluid composition comprising a complexing agent capable of forming a water-soluble metal complex with the metal biocide, said complexing agent and metal biocide having a complex stability constant K1 in the range of from about 2.5 to about 6.5, said contact causing a portion of the metal biocide in the first substrate region to be redistributed to the second substrate region.
