Preparation method of styrene-acrylate copolymer emulsion used in antirust paint

A technology of acrylate and anti-rust coatings, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of poor paint film compactness, poor salt water resistance, etc., achieve good water resistance, improve dry and wet adhesion, and paint film density high effect

Inactive Publication Date: 2011-09-28
BEIJING UNIV OF CHEM TECH
View PDF5 Cites 36 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method aims at problems such as flash rust, poor paint film compactness, and poor salt water resistance that occur when water-based styrene-acrylic emulsion is used in antirust coatings. Starting from monomer, emulsifier and molecular design, acrylate monomer, styrene etc. as the main mon

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step A: Weigh 0.72g COPS-1, 0.30g CO-897 and 0.80gAPS and dissolve in 60.00g deionized water, set as component 1; weigh 2.88g COPS-1 and 1.16g CO-897 and dissolve in 40.00g g deionized water, after stirring evenly, drop into 72.00g BA, 72.00g St, 25.20g MMA, 3.60g MAA, 3.60g APE-2005 phosphate functional monomer respectively, and stir at high speed for 1h to obtain a milky white pre-emulsion, set as Component 2; weigh 0.40g APS and dissolve in 35.00g deionized water, set as component 3; weigh 3.60g DAAM and dissolve in 5.00g deionized water, set as component 4; weigh 1.80g ADH and dissolve in 18.00g Deionized water, set as component 5.

[0025] Step B: Place component 1 at N 2 In a 1000mL four-neck flask under protection and rapid stirring, the temperature was rapidly raised to 80°C-83°C through a water bath, and after the temperature was stabilized at 80°C (10min-15min), the components 2 and Add it dropwise to the above system in 3 minutes, and the total dropping tim...

Embodiment 2

[0029]Step A: Weigh 1.08g COPS-1, 0.43g CO-897 and 0.80gAPS and dissolve in 60.00g deionized water, set as component 1; weigh 4.32g COPS-1 and 1.73g CO-897 and dissolve in 40.00g g deionized water, after stirring evenly, drop into 72.00g BA, 70.20g St, 25.20g MMA, 3.60g MAA, 3.60g APE-2005 phosphate functional monomer respectively, and stir at high speed for 1h to obtain a milky white pre-emulsion, set as Component 2; weigh 0.40g APS and dissolve in 35.00g deionized water, set as component 3; weigh 5.40g DAAM and dissolve in 5.00g deionized water, set as component 4; weigh 2.70g ADH and dissolve in 27.00g Deionized water, set as component 5.

[0030] Other steps are as shown in Example 1.

[0031] Measure the emulsion according to GB / T 1725-2007, the cohesion rate is 0.20%; measure the adhesion of the emulsion film by the circle method according to GB / T 1720-1979 (1989), and its dry and wet adhesion is grade 2; according to GB / T T 6739-2006 measures the hardness of the emuls...

Embodiment 3

[0033] Step A: Weigh 1.08g COPS-1, 0.43g CO-897 and 0.80gAPS and dissolve in 60.00g deionized water, set as component 1; weigh 4.32g COPS-1 and 1.73g CO-897 and dissolve in 40.00g g deionized water, after stirring evenly, drop into 70.20g BA, 70.20g St, 23.40g MMA, 3.60g MAA, 7.20g APE-2005 phosphate functional monomer respectively, and stir at high speed for 1h to obtain a milky white pre-emulsion, set as Component 2; weigh 0.40g APS and dissolve in 35.00g deionized water, set as component 3; weigh 5.40g DAAM and dissolve in 5.00g deionized water, set as component 4; weigh 2.70g ADH and dissolve in 27.00g Deionized water, set as component 5.

[0034] Other steps are as shown in Example 1.

[0035] Measure the emulsion according to GB / T 1725-2007, and the coagulation rate is 0.52%; measure the adhesion of the emulsion film by the circle method according to GB / T 1720-1979 (1989), and its dry and wet adhesion is grade 1; according to GB / T T 6739-2006 measures the hardness of t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a novel method for preparing a styrene-acrylate copolymer emulsion used in antirust primer paint. The method comprises steps that: (1) phosphate ester functional monomers are subject to a polymerization reaction; two hydroxyl groups of each phosphate ester group are subject to a chelation reaction on the metal surface, such that a dense phosphate ester (salt) protective film is formed on the metal surface, and water molecules and other salt ions are prevented from contacting the metal; the introduced phosphate ester group assists in improving the adhesion of painted coatings on metal surfaces, and in improving the antirust capacity of the painted coatings; (2) diacetone acrylamide (DAAM) and adipic dihydrazide (ADH) form a cross-linking system of the antirust emulsion; hydrazine groups in hydrazino-(NH2-NH2) and ketone groups in the DAAM (C=O) are subject to a dehydration condensation reaction, wherein the ketone groups are copolymerized on the copolymer; through outer cross-linking, a emulsion film with a three-dimensional reticular structure is obtained; (3) an emulsifying system is formed by combining a reactive anion emulsifier and a non-ion emulsifier, such that problems of emulsion deposition and gelling are solved. With the method provided by the invention, an aqueous emulsion with a high solid content is prepared, and water resistance and weathering resistance of the antirust paint is improved.

Description

technical field [0001] The invention belongs to the technical field of polymer material preparation, and in particular provides a method for preparing a styrene-acrylate copolymer emulsion for antirust coatings. Background technique [0002] The annual economic loss caused by metal corrosion in the world is about 700-1 trillion U.S. dollars, which is about 6 times the sum of economic losses caused by natural disasters such as earthquakes, floods, and typhoons, accounting for 2%-4% of the gross national product (GDP) of various countries. %. In order to reduce the loss caused by corrosion, people have taken many measures over the years, but so far, anti-corrosion coatings are still the most effective, economical and widely used. [0003] Acrylate polymer (PA) has a saturated structure in the main chain, so the coating with acrylate copolymer as the film-forming substance has excellent outdoor aging resistance, gloss and color retention, and is the most important film-forming...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08F220/18C08F212/08C08F220/14C08F220/06C08F230/02C08F2/30C08F2/26C08J3/24C09D125/14C09D133/08C09D5/08
Inventor 夏宇正姚乔菲石淑先
Owner BEIJING UNIV OF CHEM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap