Besmirch resistant water-containing coating composition

A composition, stain-resistant technology, applied in the field of polymer chemistry, which can solve problems such as low stain resistance

Active Publication Date: 2009-09-23
ROHM & HAAS CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a water-containing coating composition with better stain resistance after drying and forming a film, so as to overcome the defects of low stain resistance of existing similar coatings

Method used

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  • Besmirch resistant water-containing coating composition
  • Besmirch resistant water-containing coating composition
  • Besmirch resistant water-containing coating composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Preparation of Aqueous Emulsion Polymers

[0076] Lotion 1

[0077] The components of the prepared monomer emulsion were: 922g BA, 579g ST, 30.6g AA, 5.6g SSS, 438g deionized water and 64.26g 22.5wt% DBS aqueous solution, stirred and emulsified. Next, 14.11 g of 22.5 wt % DBS aqueous solution and 569 g of deionized water were added to a 5-liter multi-neck bottle equipped with mechanical stirring. The contents of the flask were heated to 90°C under a nitrogen atmosphere. To the contents of the stirred flask were added 52.4 g of monomer emulsion, 1.91 g of Na dissolved in 35.4 g of DI water 2 CO 3 , 0.035g of ferrous sulfate and 0.019g of EDTA dissolved in 15.6g of deionized water, and then 5.35g of SPS dissolved in 15.6g of deionized water was added. The remaining monomer emulsion and 2.2 g SPS dissolved in 60 g DI water and 2.34 g SBS dissolved in 60 g deionized water were added to the flask over 180 minutes. The reaction temperature was maintained at 87°C. Next, ...

Embodiment 2

[0093] Preparation of stain resistant aqueous coating composition

[0094] Paint 1

[0095] An aqueous coating composition containing the aqueous copolymer emulsion 1 was prepared using the following procedure: Table 4 lists the components of the beating process, which needs to be dispersed using a Cowles disperser. The ingredients in the letdown section of Table 4 were added using a conventional laboratory mixer. The resulting coating had a PVC of 40.0% and a percent solids mention of 38.0%.

[0096] Paint 2-4

[0097] Coatings 2-4 (both containing Emulsion 1) were prepared according to the preparation method of Coating 1. The difference from Paint 1 is that Paints 2-4 also contained paraffin wax emulsion (Michem TM Emulsion 62330 or 77030) or sulfur-containing surfactant (sodium lauryl sulfate), the type and amount of paraffin wax emulsion and sulfur-containing surfactant contained in Table 5 are listed. In addition, it is necessary to adjust the dosage of Acrysol RM-7...

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Abstract

The invention relates to a besmirch resistant water-containing coating composition, which comprises the following components in percentage: (i) a water-containing copolymer emulsion, wherein the copolymer is prepared from a mixture comprising the following monomers in percentage by weight in form of the dry weight of the copolymer: a) 89 to 99.95 percent of an olefinic bond type unsaturated non-ionic monomer, and b) 0.05 to 5 percent of phosphorous olefinic bond type unsaturated monomers or salts thereof; (ii) a pigment, which renders the PVC range of the coating composition between 5 and 65 percent; (iii) a paraffin wax emulsion of which the dry weight is 0.5 to 20 percent of that of the copolymer (i); (iv) a sulphur-containing surfactant of which the weight is 0.01 to 3 percent of the dry weight of the copolymer (i); and (v) a coating auxiliary agent. The invention also relates to a method for obtaining a besmirch resistant surface as well as a base material with the surface coated with the water-containing coating composition.

Description

technical field [0001] The present invention belongs to the field of polymer chemistry, and in particular relates to aqueous coating compositions. Background technique [0002] U.S. Patent No. 6,756,459 discloses a composition for aqueous coatings, comprising an aqueous emulsion polymer comprising ethylenically unsaturated phosphorus-containing monomers as polymerized units, the coating exhibits high-gloss properties, and when applied to metal surfaces Excellent corrosion resistance. However, coating compositions having good stain resistance are not disclosed. Contents of the invention [0003] technical problem to be solved [0004] The technical problem to be solved by the present invention is to provide an aqueous coating composition with better stain resistance after drying and forming a film, so as to overcome the defect of low stain resistance of existing similar coatings. [0005] Technical solutions [0006] The first aspect of the present invention is to provi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/06C09D5/16C09D5/02C09D143/02C09D191/06
Inventor 蒋思媛李娟孙家宽杨慧玲郑宝庆
Owner ROHM & HAAS CO
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