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Aqueous polymer composition

A water-based polymer, composition technology, applied in the direction of coating, etc.

Active Publication Date: 2019-04-26
DOW GLOBAL TECH LLC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, the weathering properties of coatings obtained from such compositions still need further improvement

Method used

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  • Aqueous polymer composition
  • Aqueous polymer composition
  • Aqueous polymer composition

Examples

Experimental program
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Effect test

example

[0067] Some embodiments of the invention will now be described in the following examples, in which all parts and percentages are by weight unless otherwise indicated.

[0068] The materials used to prepare the aqueous polymer composition are as follows,

[0069] 2-Ethylhexyl acrylate ("EHA"), methacrylic acid ("MAA"), styrene ("ST"), butyl acrylate ("BA") and methyl methacrylate ("MMA") are all Purchased from Sinoreagent Group (China).

[0070] Acrylamide ("AM"), Sodium Styrene Sulfonate ("SSS"), Glycidyl Methacrylate ("GMA"), n-Dodecyl Mercaptan ("n-DDM"), Ferrous Sulfate (FeSO 4 ·7H 2 O), ethylenediaminetetraacetic acid (“EDTA”), tert-butylhydroperoxide (“t-BHP”), isoascorbic acid (“IAA”), allyl methacrylate (“ALMA”), hydropersulfate Salt ("APS"), sodium persulfate ("SPS") and sodium hydroxide were all purchased from Shanghai Chemical Reagent Co. Ltd..

[0071] Methacryloyloxyethylethyleneurea ("MEUA") was purchased from The Dow Chemical Company.

[0072] SILQUESTA-171 ...

example 1

[0155] The paint formulation of Example 1 was prepared as follows,

[0156] Ingredients comprising the following were mixed using a high speed Cowles disperser to form a grind: 57.86 g deionized water, 0.73 g NATROSOL 250 HBR, 5.47 g propylene glycol, 0.40 g ammonia (28%), 2.92 g TAMOL 731A, 0.73 g EF-106, 0.55g DISPELAIR CF256, 0.93g KATHON LXE, 18.23g Ti-Pure R-706, 54.68g CC-700 and 36.45g Talc AT-1.

[0157] 240.9 g of a binder formed by mixing Dispersion A2 and Dispersion B1 in a weight ratio of 50:50 (Dispersion A2 / Dispersion B1 ) were then added to the grind. Then, 8.43 g of TEXANOL was added to the resulting mixture. DISPELAIR CF-256 (0.69 g), ACRYSOL RM-2020 NPR (2.5 g) and deionized water (10 g) were further added to the mixture and mixed for 30 minutes using a conventional laboratory mixer. The resulting paint formulation of Example 1 had 30% PVC and 35% volume solids.

example 2

[0158] Example 2 paint formulation

[0159] The paint formulation of Example 2 was prepared according to the same procedure described above for the preparation of the paint formulation of Example 1, except that the binder used in Example 2 was 255.4 g in a weight ratio of 75:25 (Dispersion A2 / Dispersion Mixture of Dispersion A2 and Dispersion B1 of B1).

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Abstract

An aqueous polymer composition and a coating composition comprising the aqueous polymer composition and affording coatings with improved efflorescence properties.

Description

technical field [0001] The present invention relates to aqueous polymer compositions and coating compositions comprising the same. Background technique [0002] Concrete roof tiles are susceptible to weathering, which forms white mineral deposits on the surface of concrete roof tiles. These white mineral deposits are unevenly distributed on the surface and create an unsightly blotchy appearance. Weathering also detracts from the appearance of concrete roof tiles by reducing the color intensity of the colored concrete roof tiles. In order to minimize weathering, multilayer coating systems are generally used comprising at least one primer coat and at least one topcoat, wherein the primer coat is located between the substrate to be coated and the topcoat. However, significant challenges remain in terms of cost reduction, production efficiency, and compatibility between primer coats and topcoats. Accordingly, it would be desirable to provide a coating composition that is suit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C09D201/06C04B41/63
CPCC04B41/483C04B41/63C08L101/00C04B2111/00594C04B2111/21C04B41/009C04B41/502C04B2103/40C04B28/02C09D201/06C08L33/14C08L101/005C04B2103/54C04B41/4876C09D5/00C09D125/14C09D133/062
Inventor 胡月晗刘涵董祥亭王毓江
Owner DOW GLOBAL TECH LLC