Biocides based on silanol terminated silanes and siloxanes

Chemical apparatus and process disinfecting – deodorizing – preser – Process disinfecting – preserving – deodorizing – or sterilizing – Using disinfecting or sterilizing substance

Reexamination Certificate

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Details

C556S440000

Reexamination Certificate

active

07347970

ABSTRACT:
A method of destroying target microorganisms comprises the step of contacting at least one target microorganism with at least one low molecular weight silanol end group containing molecule. The silanol containing molecule is selected from silanols (R1R2R3SiOH), siloxanediols HO(R1R2SiO)nH or siloxanols HO(R1R2SiO)nSiR1R2R3, where R1, R2and R3are selected from 1 to 4 carbon alkyl or fluoroalkyl moieties, or vinyl, or aryl groups and n is <6 . The silanol end group containing molecule can be triethylsilanol, diphenylmethylsilanol, t-butyldimethylsilanol, n-butyldimethylsilanol, n-propyldimethylsilanol, ethyldimethylsilanol, vinylphenylmethylsilanol, phenyldimethylsilanol, 3,3,3 trifluoro propyldimethylsilanol, benzyldimethylsilanol and phenethyldimethylsilanol, or mixtures thereof. A composition of matter includes a silanol end group containing molecule according to the invention blended with a polymer or dissolved in aqueous solution along with an ether-based cosolvent.

REFERENCES:
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patent: 0857770 (1998-08-01), None
patent: WO 2004/045552 (2004-06-01), None
Gravier et al. “A Review of the Fate and Effects of Silicones in the Environment”, Journal of Polymers and the Environments, vol. 11, No. 4, Oct. 2003, pp. 129-136.
Bennett et al. “Primate Absorption and Elimination Balance Studies Including Pulmonary, Urinary, Biliary and Fecal Excretion of T-Butanol, Trimethylsilanol, Dimethylsilanediol and Hexamethyldisiloxane” Toxicology and Applied Pharmacology, 1973, 25(3):445.

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