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Low odor compositions and low odor coating compositions

A composition and water-based composition technology, applied in the direction of polyester coatings, coatings, etc., can solve problems such as coating or paint properties, enzyme degradation, etc. that have not been discussed

Active Publication Date: 2011-06-22
ROHM & HAAS CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this document does not discuss the properties of the formulated coatings or paints, and the methods described therein fail to produce any low-odor paints that can be used in commercial applications because of the enzymes described therein and the enzymes described therein. levels that can cause enzymatic degradation of paint

Method used

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  • Low odor compositions and low odor coating compositions
  • Low odor compositions and low odor coating compositions
  • Low odor compositions and low odor coating compositions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0148] Example 1 Determination of headspace VOC content based on ASTM D3960-05

[0149] Determination of headspace in aqueous compositions based on ASTM 3960: Standard Practice for Determining Volatile Organic Compound (VOC) Content of Paints and Related Coatings VOC content. This method uses static headspace sampling / GC-MS to determine the concentration of headspace compounds above waterborne emulsion polymers or waterborne paints at 33°C.

[0150] Preparation of standards: Calibration standards are prepared in a suitable solvent (eg THF, tetrahydrofuran) containing a minimum of three concentrations of each compound to be calibrated. Standard concentrations should be prepared by serial dilution and calculated in ppm on a weight / weight basis. The concentration of each compound in the lower and higher concentration standards should produce a detector response signal, and the response of the compound is used for sample analysis. 20 mg of each standard was weighed into 22 ml...

Embodiment 2

[0152] Example 2 Determination of enzymatic hydrolysis activity

[0153] The procedure used to determine the enzyme activity of emulsion polymer latexes or latex paints is similar. For emulsion polymer latex, a 100 gram sample of emulsion polymer latex binder was treated with different enzymes at concentrations ranging from 2.5 to 1000 ppm (weight of enzyme solids based on wet latex weight). After equilibrating for 1 day, samples were further treated with approximately 600 ppm of ethyl acrylate (EA) and incubated in sealed jars at room temperature at pH = 8.5 for 48 hours. 5 g samples were taken at 15 min, 75 min, 135 min, 1440 min and 2880 min intervals, diluted with 5 g of deionized water, quenched with 100 ppm of 48% phosphoric acid to a pH of approximately 1.6, and mixed well . The catalytic activity of the free enzyme was then determined by calculating the change in headspace EA in the inhibited latex samples using GC-MS or GC / FID (by the method of Example 1) at time ...

Embodiment 3

[0154] Example 3: Synthesis of Emulsion Polymer Latex, Polymer A

[0155] A monomer emulsion was formed from the following components: 1397 grams of ethyl acrylate, 386 grams of methyl methacrylate (and <2 wt. Ionized water and 51.8 grams of anionic surfactant (30% active), emulsified under agitation. Into a 4 liter multi-neck flask equipped with mechanical stirring was added 9 grams of anionic surfactant (30% active) and 547 grams of deionized water. The contents of the flask were heated to 75°C under a nitrogen atmosphere. 67 grams of monomer emulsion were added to the stirred flask contents, followed by 0.02 grams of ferrous sulfate heptahydrate dissolved in 23.5 grams of deionized water and 0.02 grams of EDTA tetrasodium salt and sodium carbonate (based on the total amount of monomers) count less than 0.5%). Polymerization was initiated by adding 1.2 grams of sodium persulfate dissolved in 36 grams of deionized water and 0.6 grams of sodium bisulfite dissolved in 5 gr...

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Abstract

This invention provides stable aqueous compositions including stable coating compositions, and methods of their production. The stable aqueous compositions and stable aqueous coating compositions comprise one or more emulsion-polymerized addition polymer, one or more carboxylesterase enzyme, and one or more carboxylesterase deactivating agent, such that the ester hydrolysis activity in the composition is less than 0.010 micromole / minute, and wherein the aqueous composition has a headspace volatile organic compound (VOC) content, as measured by headspace gas chromatography-mass spectrometry (GC-MS) at 33 DEG C, of less than 10 ppm of organic carboxylester with a normal boiling point of less than 150 DEG C and more than 50 ppm of mono-alcohol with a formula molecular weight of less than 76.The carboxylesterase enzyme is employed to minimize the free carboxylester content in the composition, thereby providing a low odor composition, and the carboxylesterase is deactivated in situ in order to minimize the residual carboxylesterase enzyme activity.

Description

technical field [0001] The present invention relates to stable aqueous polymer compositions, including stable coating compositions, such as paints, and to methods for their production. More specifically, the present invention relates to stable aqueous polymer compositions comprising one or more emulsion polymerized addition polymers, one or more carboxylesterase enzymes, and one or more A carboxylesterase deactivator, so that the ester hydrolysis activity in the composition is less than 0.010 μM / min, measured at 33° C. using headspace gas chromatography-mass spectrometry (GC-MS), and the aqueous coating composition has a The headspace volatile organic compounds (VOCs) contain less than 10 ppm of organic carboxylic acid esters with normal boiling points below 150°C and more than 50 ppm of monohydric alcohols with a formula molecular weight of less than 76. [0002] Paint formulators strive to reduce or eliminate formulation additives that contribute to the odor of water-based ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D201/00C09D133/00C09D125/14C09D131/04C09D123/08C09D133/08C09D133/12C09D7/12C09D5/00
CPCC08L33/04C09D131/04C08F6/006C09D135/06C09D133/04C08L2201/52C09D133/08C08L33/00C08L67/00C09D131/02C09D167/00
Inventor J·C·博林K·R·曼纳P·F·多尔A·M·莫里斯D·L·弗拉达瑞利
Owner ROHM & HAAS CO
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