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Environmentally Friendly Colorant Compositions and Latex Paints/Coatings

a technology of colorant compositions and latex paints, applied in the field of colorant compositions and aqueous latex paints, can solve the problems of reducing the amount of environmentally undesirable substances in paints and other coatings, reducing the sag resistance of paints, etc., and achieves moderate or good sag resistance, good sag resistance, and good sag resistan

Active Publication Date: 2014-06-26
BENJAMIN MOORE & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The solution allows for the production of 'green' aqueous latex paints with maintained performance, meeting environmental standards by minimizing volatile non-aqueous constituents, alkylphenol ethoxylates, crystalline silica, and formaldehyde, while preserving key properties such as Stormer low-shear viscosity stability, rheological profile, flow / leveling, and color transfer resistance.

Problems solved by technology

However, simply minimizing the amount of environmentally undesirable substances in paints and other coatings is recognized to be insufficient.
Achieving the dual objectives of “greening” paints and other coatings while maintaining good performance is a challenging proposition.
We have seen that formulating aqueous latex paints and other water-borne coatings in accordance with “green” principles commonly leads to degradation of at least one important property, and often more than one, in the paint or other coating in question.
When an aqueous latex paint or other water-borne coating is “greened” by minimization of solvent, additive or impurity content such as VNCs, APEs or derivatives, crystalline silica and formaldehyde, it is clearly difficult to prevent the diminution of one or more of those properties.
Further complication arises when aqueous latex paints or other water-borne coatings are tinted.
However, unlike pre-formulated aqueous latex paints and other water-borne coatings, colorant compositions are not generally included within the scope of materials governed by “green” standards (at least non-governmental third-party standards).

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

Preparation of Copolymer Surfactant Free of APE

[0156]The emulsion polymerization was carried out in a four-neck flask under nitrogen purge. The reaction flask was equipped with a condenser, a thermometer, an agitator and a feeding pump. The flask was immersed in a temperature controlled water bath maintained at a constant temperature within about ±0.1° C. of the set point. Table 1 shows the ingredients used for the copolymer surfactant.

TABLE 1Ingredients for Preparation of Copolymer Surfactant (1)ComponentParts (by weight)Initial Charge in ReactorDeionized water48.5Sodium dodecyl benzene sulfonate (22% w / w)0.3Monomer EmulsionDeionized water17.3Sodium dodecyl benzene sulfonate (22%)0.7Methacrylic acid11.6Vinyl acetate13.9Butyl acrylate4.2Tristyrylphenylpoly(ethyleneoxy) methacrylate (60%)0.4Diallyl phthalate0.03Initiator Solution 1Sodium persulfate0.15Deionized water1.4Initiator Solution 2Sodium persulfate0.15Deionized water1.4Total100

Deionized water and sodium dodecyl benzene sultan...

example 2

Preparation of Copolymer Surfactant (2)

[0158]The reactant composition was the same as in Example 3 of U.S. Pat. No. 7,402,627, except ammonium nonylphenyl ether persulfate, an APE surfactant, was replaced with an APE-free surfactant, sodium tridecyl ethoxy sulfate (RHODAPEX EST-30 from Rhodia Inc.), as shown in Table 2.

[0159]The same procedures and conditions as in Example 1 were used.

TABLE 2Ingredients for Preparation of Copolymer Surfactant (2)ComponentParts (by weight)Initial Charge in ReactorDeionized water49.4sodium tridecyl ethoxy sulfate (30% w / w)0.1Monomer EmulsionDeionized water13.9sodium tridecyl ethoxy sulfate (30%)0.8Abex 20201.2Methacrylic acid9.8Vinyl acetate9.8Ethyl methacrylate9.8Tristyrylphenylpoly(ethyleneoxy) methacrylate (60%)1Initiator Solution 1Ammonium persulfate0.03Deionized water1.3Initiator Solution 2Deionized water2sodium tridecyl ethoxy sulfate (30%)0.5Abex 20200.4Ammonium persulfate0.04Rinse Deionized water0.9Total100

[0160]The surfactant ABEX 2020 was a ...

example 3

Preparation of Copolymer Surfactant Free of APE

[0161]The monomer composition was the same as in Example 4 of U.S. Pat. No. 7,402,627, except a di-functional monomer, diacrylate (Sartomer SR610), was used as a crosslinking monomer. Ammonium nonylphenyl ether persulfate (APE surfactant) and Abex 2020, per Example 4 of U.S. Pat. No. 7,402,627, were replaced with sodium dodecyl benzene sulfonate (22% w / w) and RHODAFAC RS-610A-25 (polyoxyethylene tridecyl etherphosphate, Rhodia Inc.).

[0162]The same procedures and conditions as for Example 1 were used in preparing the copolymer surfactant. Thus, after monomer feeding was complete, the temperature of the reaction flask was maintained at 80-85° C. for one hour. The reactor was then cooled to 60-65° C. and chaser mixtures were fed to the reactor over 30 minutes. It was then cooled to room temperature. The copolymer surfactant product, in the form of a latex or emulsion, was recovered, with a solids content of about 30%.

TABLE 3Ingredients for...

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PUM

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Abstract

The invention relates to colorant compositions, and aqueous latex paints or other water-borne coatings made from them, which have a mitigated environmental impact. Levels of solvents, additives and impurities comprising volatile non-aqueous constituents, alkylphenol ethoxylates (and derivatives thereof), crystalline silica, and / or formaldehyde are decreased relative to those typical of preceding generations of colorants and tinted aqueous latex paints and other water-borne coatings. On the other hand, paint-performance as indicated by any of Stormer viscosity stabilization, rheological profile flow / leveling and sag resistance, water sensitivity and color transfer resistance is comparable to a paint in which the aforementioned solvents, additives and impurities are still present.

Description

FIELD OF THE INVENTION[0001]The invention relates to colorant compositions, and aqueous latex paints or other water-borne coatings made from them, which have a mitigated environmental impact.BACKGROUND OF THE INVENTION[0002]There is increasing societal sensitivity to environmental issues, including minimization of solvent and impurity levels for the purposes of eliminating health concerns, preserving the integrity of the earth's resources, and the like. In that connection, there have been substantial efforts not only in the public sector, but also the private sector, to institute improved environmental practices. This has included the introduction of voluntary and sometimes mandatory standards by which the environmental friendliness of products and services in the marketplace can be judged (see Green Seal Environmental Leadership Standard for Paint GS-11). Products and services which meet such standards, and the commitment to furnishing same, are often referred to as “green”. Indeed...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C08L1/00C08L33/10C08K3/22C08L53/00C08K5/3437C08K5/23C08L39/06C08L33/08C08K5/3417C09K23/00
CPCC08F218/08C08K5/0041C09D17/001C08L33/02C09D5/027C08L33/14C08K3/013C08F220/06C08F220/306C08F220/1802C08F220/286C08F222/102C08K3/22C08K2003/2272C09D133/10
Inventor YANG, YONGASIF, MOHAMMEDSHEERIN, ROBERT J.
Owner BENJAMIN MOORE & CO
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