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Thermo-setting acrylic-acid emulsion, its preparing method and paint containing same

An acrylic emulsion, thermosetting technology, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problem of primer stability, adhesion test and evaluation of primer post-processing, poor corrosion resistance, and affect the stability of primer coating issues such as interlayer adhesion

Active Publication Date: 2006-08-09
GUANGZHOU HUMAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the commercially available organic primers are mainly based on acrylic and epoxy resins, and the main problems are as follows: (1) The corrosion resistance of the coating is not ideal, and the general single-layer coating should reach 1.5um or more , and the salt spray resistance can only reach 9.5 or even lower levels; (2) The coating stability is not good, and some products are prone to deposits during the coating process, which affects the coating quality; The service life is only tens of hours. If it is not used up, the remaining part can no longer be used, which is a huge waste; some coatings change in physical and chemical properties during use, especially the viscosity increases with the extension of the coating process , causing the thickness of the coating film to be uncontrollable and the performance of the coating to decline
Because the primer contains more defoamers and leveling agents, it directly affects the coating stability of the primer coating, and also has a greater impact on the interlayer adhesion between the primer and the top coat; and the patent The stability of the primer, the post-processing of the primer, and the adhesion between the primer and the topcoat have not been tested and evaluated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Recipe (1):

[0075] Sodium vinyl sulfonate (25% aqueous solution) 8.0g

[0076] Sodium lauryl sulfate (5% aqueous solution) 4.0g

[0077] 150g deionized water

[0078] Recipe (2):

[0079] Methyl methacrylate 35.5g

[0080] Isooctyl acrylate 15.0g

[0081] Butyl acrylate 18.4g

[0082] Acrylic acid 1.5g

[0083] Hydroxyethyl Acrylate 25g

[0084] A-174 (GE Silane Division) 1.0g

[0085] Vinyl tertiary carbonate (EXXON company) 1.5g

[0086] Trimethylolpropane diallyl ether 0.1

[0087] Formula (3):

[0088] Potassium persulfate (5% aqueous solution) 16g

[0089] The preparation steps of thermosetting acrylic emulsion are as follows:

[0090] (1) Under the condition of nitrogen protection, in a 1-liter reaction bottle equipped with a stirrer, a thermometer, and a condenser, add the substances in the formula (1) in sequence, stir and mix evenly, and heat to 40°C to make a mixture A:

[0091] (2) Add all the monomers in the formula (2) to the beaker one by o...

Embodiment 2

[0096] Recipe (1):

[0097] AMPS (Lubrizol company) 25% ammonia solution * 4.0g

[0098] Sodium lauryl sulfate (5% aqueous solution) 16.0g

[0099] 150g deionized water

[0100] Recipe (2):

[0101] Methyl methacrylate 42.95g

[0102] Isooctyl acrylate 20.0g

[0103] Butyl acrylate 14.0g

[0104] Methacrylic acid 4.0g

[0105] Hydroxyethyl methacrylate 15g

[0106] Witco A-172 (GE Silane Division) 1.5g

[0107] Glycidyl methacrylate 1.5g

[0108] Trimethylolpropane trimethacrylate 0.05

[0109] Formula (3):

[0110] Potassium persulfate (5% aqueous solution) 30g

[0111] ( * Preparation of AMPS 25% ammonia solution: the AMPS solid is made into a 30% aqueous solution with deionized water, then the pH is adjusted to 5-6 with ammonia water, and then the effective part is adjusted with deionized water, which is 25% based on AMPS. )

[0112] The preparation steps of thermosetting acrylic emulsion are as follows:

[0113] (1) Under the condition of nitrogen protect...

Embodiment 3

[0119] Recipe (1):

[0120] AMPS (NH3) (Lubrizol company) (25% aqueous solution) 16.0g

[0121] Sodium lauryl sulfate (5% aqueous solution) 2.0g

[0122] 150g deionized water

[0123] Recipe (2):

[0124] Methyl methacrylate 40.3g

[0125] Isooctyl acrylate 16.0g

[0126] Butyl acrylate 21.0g

[0127] Acrylic acid 8.0g

[0128] Hydroxyethyl Acrylate 10g

[0129] A-151 (GE Silane Division) 0.5g

[0130] Trimethylolpropane triacrylate 0.2g

[0131] Formula (3):

[0132] Potassium persulfate (5% aqueous solution) 60g

[0133] The preparation steps of thermosetting acrylic emulsion are as follows:

[0134] (1) Under the condition of nitrogen protection, in a 1-liter reaction bottle equipped with a stirrer, a thermometer, and a condenser, add the substances in the formula (1) in sequence, stir and mix evenly, and heat to 70°C to make a mixture A;

[0135] (2) Add all the monomers in the formula (2) to the beaker one by one, stir and mix evenly to make mixture B;

[01...

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Abstract

This invention discloses a thermoset crylic acid latex and its preparation method and a corrosion resistant bottom coat containing such latex and used in the Al fins of the heat converter of air conditioners, in which, said latex includes a crylic acid kind monomers, an ionic vinyl monomers, an ethene monomers, a vinyl silane coupler, a crosslink monomers, a surface active agent and an initiator to be got by seed latex and semi-continuous drop technology. Said bottom coat includes said thermoset crylic acid latex, water-base coating resin, water-base cross-linker, booster solvent, neutralization agent, a water-base adhesive force accelerant, a catalyst and water.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a thermosetting acrylic emulsion and a preparation method thereof, and a corrosion-resistant primer containing the emulsion and used for aluminum fins of air-conditioning heat exchangers. Background technique [0002] With global warming, the market demand for various types of air conditioners is increasing; and the situation of energy shortage has prompted the development of air conditioners in the direction of lightweight, miniaturization, and high energy efficiency. One of the effective measures to realize the lightweight, miniaturization and high energy efficiency ratio of the air conditioner is to reduce the thickness of the aluminum fins of the air conditioner heat exchanger, reduce the distance between the aluminum fins, and increase the heat transfer area per unit weight of the heat exchanger . At present, the thickness of aluminum foil used for aluminu...

Claims

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Application Information

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IPC IPC(8): C08L33/14C09D133/14C09D5/08
Inventor 唐靖黄光燕陈兴耀陈勇李晨隽唐泉
Owner GUANGZHOU HUMAN CHEM
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