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Method for reducing odor in latex paints

A latex paint, odor technology, used in latex paint, coatings, polyurea/polyurethane coatings, etc., can solve problems such as no description

Active Publication Date: 2012-06-27
NUTRITION & BIOSCIENCES USA 2 LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no non-metallic stabilizers are described for reducing odor in latex paints containing 3-isothiazolones

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0019] The paint used as the basis for this study contained 22% acrylic latex, 22% water, 24% titanium dioxide, 14% talc, 7% clay, 9% calcium carbonate, and other minor components including 0.25% hydroxyethylcellulose . A series of paints were prepared by adding 1000 ppm MIT to the base latex paint. This amount, which is ten times the usual amount, was chosen to increase the odor produced so that it can be detected more easily and differentiated between different samples. The stabilizer was added just before the biocide was added. The PVC of the paint is 63.25%. The stabilized paints were then subjected to accelerated pot aging at 40°C or 50°C for 2 or 3 weeks. After heat aging, the paint was applied to a glass support and dried for 48 hours. Carry out the sensory (olfactory) evaluation of sulfur odor, and the results are listed in Table 1.

[0020] Ideal tracking experiments were performed using selected scavengers in combination with conventional amounts of MIT (100 ppm...

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PUM

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Abstract

A method for reducing odor arising from surfaces coated with latex paints. The method comprises combining in a latex paint: (i) at least one stabilizer; (ii) at least isothiazolone one biocide comprising 2-methyl-4-isothiazolin-3-one or 2-n-octyl-4-isothiazolin-3-one; and (iii) at least one thickener comprising a polyurethane, hydroxyethyl cellulose, carboxymethyl cellulose, an alkali soluble emulsion polymer, a hydrophobically modified alkali soluble emulsion polymer or a hydrophobically modified hydroxyethyl cellulose.

Description

technical field [0001] This invention relates to a method of reducing odors from surfaces coated with latex paint. Background technique [0002] Under some environmental conditions, including high heat, humidity and ozone, basic latex paints preserved with certain 3-isothiazolone biocides can give off an undesirable odor after application and drying . Copper salts have been used as preservatives for isothiazolone biocides in an attempt to reduce this odor, but the use of copper is undesirable because of the staining of the paint. [0003] In U.S. Patent No. 6,437,020, the addition of 4-hydroxyl-2,2,6,6-tetramethylpiperidinoxyl (piperidinoxyl) (4-hydroxyl TEMPO) or diethylhydroxylamine to make polyurethane for latex paint Thickener stabilization. However, there is no description of non-metallic stabilizers for reducing odor in latex paints containing 3-isothiazolones. [0004] The problem solved by the present invention is to provide a method for reducing the odor generat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/12C09D5/02C09D101/08C09D175/04C09D201/00
Inventor J·W·阿什莫尔J·N·尤纳坦T·-B·T·特兰
Owner NUTRITION & BIOSCIENCES USA 2 LLC