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Stable, low VOC, low viscous biocidal formulations and method of making such formulations

A preparation and biocide technology, applied in the field of stable biocide preparations, can solve problems such as high viscosity

Active Publication Date: 2009-07-22
NUTRITION & BIOSCIENCES USA 1 LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The disadvantage of the PEG-400 based BIT formulation is that the formulation has a higher viscosity

Method used

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  • Stable, low VOC, low viscous biocidal formulations and method of making such formulations
  • Stable, low VOC, low viscous biocidal formulations and method of making such formulations

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Two formulations of the invention with a single BIT biocide were prepared with the following components. MPEG-350 to Carbowax TM MPEG-350 was obtained from The Dow Chemical Company.

[0053] sample number Wt% of BIT % by weight of caustic Weight % of MPEG-350 % by weight of water B 1 20 3 57.72 19.28 B 2 20 3 52.72 24.28

[0054] These two samples were compared with 1) commercially available product (" GXL" - a registered trademark of Avecia / Arch) ("Sample No.D 1 ") and 2) the most preferred formulation made according to US Patent Application No. 2005 / 0220830 ("Sample No.D 2 ") by comparison. It was found that if only 50-60 wt% of PEG-400 was used as a carrier, the formulation of 20 wt% of BIT was not stable and had crystallization. Therefore, for D 2 The samples required a higher level of PEG-400, about 70%.

[0055]

[0056] The table below illustrates a comparative study of viscosity and pH:

[0057] sample...

Embodiment 2

[0068] A formulation of the invention containing two biocides is prepared from the following components:

[0069]

[0070] Sample B of the present invention 3 with the Rohm & Haas 607 compared to the 607 contains 12% by weight of BIT, 10% by weight of bronopol, and 78% by weight of water and other inert ingredients. 607 does not contain the liquid carrier of the present invention. Find 607 is a dispersion formulation while B 3 It is a clear solution with low viscosity.

Embodiment 3

[0072] The instructions for formulations containing CARBOWAX MPEG 750 (750 molecular weight MPEG available from The Dow Chemical Company) are as follows:

[0073] sample number Wt% of BIT % by weight of caustic Weight% of MPEG-750 % by weight of water B 3

[0074] The prepared formulation was transparent, indicating the good solubility of BIT. The formulation has a pH of about 8.2 and a maximum VOC content of 0.5%.

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Abstract

The invention relate to a stable, low VOC, low viscosity biocide formulation comprising an effective amount of at least one biocide, 1,2-benzisothiazolin-3-one (BIT), and a polyglycol liquid carrier of formula (I): R-O-(AO)n-O-R1, wherein n is 4-25, R and R' are hydrogen, C1-C3 alkyl groups, O=C-CH3 group, or O=C-C2H5 group, and AO is a) CH2CH2O, or b) CH2CH2O / CH2CHMe-O block or random copolymer; with proviso that when R and R' are both hydrogen, AO is a block or random copolymer. The invention also relates to a method of making such a formulation.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application Serial No. 60 / 833,160, filed July 25, 2006, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to stable biocidal formulations containing 1,2-benzisothiazolin-3-one ("BIT") and polyglycols. The novel formulations exhibit one or more of the following properties: low volatile organic carbon ("VOC"), low viscosity, near neutral to acidic pH, and good freeze-thaw stability. The novel formulations of BIT, with or without one or more additional biocides, are advantageously used in latexes, paints, coatings, leather, metalworking fluids, cosmetics and personal care products to control unwanted of microbial growth. Background technique [0004] BIT, shown below, is a well known biocide that has been used for several years to defend aqueous media against microorganisms including bacteria. For example,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/80A01N25/02
CPCA01N43/80A01N25/02
Inventor P·M·勒努瓦I·西格里斯特
Owner NUTRITION & BIOSCIENCES USA 1 LLC
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