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Water dispersion of self-drying acrylic modified alkyd resin industrial topcoat using the water dispersion as base

An alkyd resin and acrylic technology, which is applied in the field of coatings, can solve the problems of poor film-forming and decorative properties, poor water resistance of paint films, and poor resistance to hydrolysis of resins, and achieves the effects of good decorative properties, good film-forming properties and low cost.

Inactive Publication Date: 2008-11-19
SHANGHAI HUAYI FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] By comparing the current methods of water-based alkyd resins, it is found that water-dilutable alkyd resins have the following three disadvantages: first, there are a large amount of organic solvents; second, the triethylamine used is currently used in coatings. Restricted use in the industry; Third, due to the ortho effect of phthalic acid, the resin is not resistant to hydrolysis
Self-emulsifying alkyd resins have the following disadvantages: low emulsification efficiency; some resins need to be neutralized with amine (or ammonia) and other neutralizing agents; the obtained emulsion has low solid content, etc.
There are also some disadvantages in the way of adding emulsifiers. For example, due to the use of a large amount of emulsifiers, there are many disadvantages such as poor water resistance of the paint film, poor film forming and decorative properties.

Method used

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  • Water dispersion of self-drying acrylic modified alkyd resin industrial topcoat using the water dispersion as base
  • Water dispersion of self-drying acrylic modified alkyd resin industrial topcoat using the water dispersion as base
  • Water dispersion of self-drying acrylic modified alkyd resin industrial topcoat using the water dispersion as base

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 800 g of xylene was put into the four-neck flask, and the temperature was raised to reflux. Mix 720g of styrene, 135g of vinyl tertiary carbonate, 45g of acrylic acid, and 45g of benzoyl peroxide, and mix them evenly. After the benzoyl peroxide (BPO) is completely dissolved, add the materials dropwise, and drop them for 5 hours under reflux. Finished, and then keep warm for 1.5 hours. Continue to add dropwise the mixed solution of 100 g of xylene and 10 g of benzoyl peroxide, and finish dropping in 1 hour under reflux, and then keep the temperature for 2 hours, then the material can be discharged and used as an acrylic acid prepolymer for subsequent use.

Embodiment 2

[0030] 800 g of xylene was put into the four-neck flask, and the temperature was raised to reflux. Mix 720g of styrene, 135g of butyl acrylate, 45g of methacrylic acid, and 45g of benzoyl peroxide evenly. After the BPO is completely dissolved, add the material in a dropwise manner. Drop it in reflux for 4 hours, and then keep it warm for 1.5 hours . Continue to add dropwise the mixed solution of 100 g of xylene and 10 g of benzoyl peroxide, and finish dropping in 1 hour under reflux, and then keep the temperature for 2 hours, then the material can be discharged and used as an acrylic acid prepolymer for subsequent use.

Embodiment 3

[0032] Add 334 g of linseed oil into the reaction flask, and after passing through nitrogen for 10 minutes, start to stir and heat up. When the temperature is raised to 160°C, add 103g of pentaerythritol, 0.2g of lithium hydroxide and 0.1g of antioxidant in turn, continue to heat up to 240°C, and maintain the alcoholysis at this temperature until the volume ratio of the alcoholyzate to ethanol is 1: When the mixture of 3 remains transparent, it is the end point of alcoholysis. Cool down to 180°C, add 64g of benzoic acid, 450g of acrylic acid prepolymer of Example 1 and 0.1g of antioxidant in sequence, gradually raise the temperature to 210°C, and make the acid value below 20mgKOH / g. Cool down to 180°C, add 152g of phthalic anhydride, continue esterification at 225°C until the acid value is below 20mgKOH / g, then cool down and discharge, as acrylic modified alkyd resin for later use.

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Abstract

The invention relates to 'core-shell' structure self-drying acrylic modified alkyd water dispersoid emulsion with acrylic modified alkyd as the 'core' and reactive nonmigratory surface active agent as the 'shell' and with a acid value between 5 and 20 mgKOH / g, a solid content between 40 and 60 weight percent and an emulsion grain diameter between 0.2 and 2 micrometers, and water dispersoid industrial finish paint with the acrylic modified alkyd water dispersoid emulsion as base material. The acrylic modified alkyd water dispersoid emulsion has good storage stability and hydrolysis resistance (the acid value of the acrylic modified alkyd water dispersoid emulsion is almost unchanged during the storage process). The acrylic modified alkyd water dispersoid finish paint with high glossiness and decorativeness can be made by taking the emulsion as the base material and matching with pigment and auxiliary agent. The construction performance, the self-drying property, the mechanical strength and the decorativeness of the acrylic modified alkyd water dispersoid finish paint can be compared with those of solvent alkyd finish paint.

Description

technical field [0001] The present invention relates to the coating industry in the field of chemical industry, in particular to a basic raw material used in the manufacture of water-based coatings, namely a synthetic formula, a manufacturing method and a method for self-drying acrylic modified alkyd resin aqueous dispersion emulsion Industrial topcoats based on this emulsion. Background technique [0002] Alkyd resin is one of the earliest and largest synthetic resins. Alkyd resin basically does not depend on petroleum products, and has a unique price advantage; in addition, the components and properties of alkyd resin can be adjusted in a wide range, and different performances can be obtained only by different polyols and polyacids. resin. That is, changes in the ratio of functionality between alcohols and acids can control the degree of branching. These characteristics undoubtedly enable alkyd resins to be used in more fields. [0003] Alkyd resins, due to their low mo...

Claims

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Application Information

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IPC IPC(8): C08G63/47C08G63/49C09D167/08
Inventor 赵其中
Owner SHANGHAI HUAYI FINE CHEM CO LTD
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