The preparation method of the solvent-free anion/nonionic waterborne polyurethane acrylate graft copolymer with ipn structure

A water-based polyurethane and acrylate technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of unfavorable color palette personnel, differences in dry humidity of paint films, poor physical and mechanical properties of paint films, etc.

Active Publication Date: 2017-09-26
GUANGDONG YATU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are reports about water-based metallic flash paint in many professional journals and magazines at home and abroad, and DuPont, Aksu and PPG have corresponding products on the market, but these products have their defects: (1) The water resistance and water resistance of the paint film Chemical properties and weather resistance are not up to the level of solvent-based metallic glitter paint; (2) The physical and mechanical properties of the paint film are worse than solvent-based metallic glitter paint; (3) The solvent content reaches 15%-25%, although it is far lower than solvent-based metallic glitter paint (4) When acrylic emulsion is used as the main resin, the wet paint film obtained by spraying the prepared metal glitter paint will have blue light, and the blue light will disappear after drying, resulting in obvious differences in the dry humidity of the paint film. Not good for colorists

Method used

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  • The preparation method of the solvent-free anion/nonionic waterborne polyurethane acrylate graft copolymer with ipn structure
  • The preparation method of the solvent-free anion/nonionic waterborne polyurethane acrylate graft copolymer with ipn structure
  • The preparation method of the solvent-free anion/nonionic waterborne polyurethane acrylate graft copolymer with ipn structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] 1. Synthesis of solvent-free anion / nonionic PUA containing IPN structure

[0119] The synthetic formula of the solvent-free anion / nonionic PUA with IPN structure is shown in Table 3, and its synthetic process is as follows: 1. in the reactor equipped with agitator, condenser, thermometer, electric heating mantle and vacuum pump, first Add glycidyl tert-carbonate, heat up to 130-140°C, then add o-cyclohexanedioic acid-1-[1-methyl-2-[(1-oxo-2-propenyl)oxy]ethyl ] ester, part of MMA, triethylene glycol monomethyl ether acrylate, ethoxylated trimethylolpropane triacrylate and part of the mixture of di-tert-amyl peroxide and dodecyl mercaptan are added dropwise into the reactor, After 3-4 hours of dripping, add the remaining MMA and initiator, drop it within 0.5 hours, and finally keep it at 150°C for 2 hours to prepare PA prepolymer; Mix ester diol, polyethylene glycol monomethyl ether dimethylol propionate, trimethylolpropane and IPDI evenly, add to the reaction kettle, r...

Embodiment 2

[0136] Table 6 shows that in Example 2, under the condition that the amount of other monomers is kept constant, ethoxy ethoxy ethyl acrylate, triethylene glycol monomethyl ether acrylate, methoxy polyethylene glycol 400 acrylic acid are respectively used ester and methoxypolyethylene glycol 550 acrylate to synthesize a solvent-free anionic / nonionic PUA with IPN structure. The formula numbers are 5, 6, 7 and 8, and there are 4 formulas in total. The synthesis process of each recipe is the same.

[0137] According to the technical process of the anion / nonionic PUA of solvent-free synthesis with IPN structure according to embodiment 1, numbering is 4 kinds of PUA shown in table 6 as 5~8, prepares by the formula of embodiment 1 coating and the process of mixing paint The one-component water-based metallic glitter paint for automobiles containing the solvent-free anion / nonionic PUA with IPN structure prepares the paint film according to the construction method of the metallic glitt...

Embodiment 3

[0146] Table 8 changes the amount of triethylene glycol monomethyl ether acrylate to synthesize the basic formula of the solvent-free anion / nonionic PUA with IPN structure

[0147]

[0148]

[0149] Table 8 is that in Example 3, under the condition that the amount of other monomers is kept constant, the amount of triethylene glycol monomethyl ether acrylate is gradually increased to 11g, 18g, 25g and 32g to synthesize solvent-free compounds with IPN structure. The feeding formulas of anionic / nonionic PUA are numbered 9, 10, 11 and 12 in sequence, and there are 4 formulas in total. The synthesis process of each recipe is the same.

[0150] According to the technical process of the anion / nonionic PUA of solvent-free synthesis with IPN structure according to embodiment 3, numbering is 4 kinds of PUA shown in table 8 as 9~12, prepares by the formula of embodiment 1 coating and the process of mixing paint The one-component water-based metallic glitter paint for automobiles c...

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Abstract

The invention discloses a preparation method of a solvent-free anion / nonionic water-based polyurethane-acrylate graft copolymer with an IPN structure. Wherein the solvent-free anion / nonionic PUA with IPN structure first synthesizes polyacrylate (PA) from component a, component b, component c, component d and component e and initiator and chain transfer agent Polymer, then add component f, component g, component h, component i, component j and catalyst to the reactor, react until NCO reaches the predetermined value, finally add amine neutralizer to neutralize, add deionized Water emulsification to obtain a solvent-free anion / nonionic PUA with a solid content of 35%-40% and an IPN structure. The PUA prepared by the present invention has the following characteristics: ① does not contain any organic solvent; ② both PU and PA form a cross-linked structure inside, and the two cross-linked networks interpenetrate each other; ③ PU and PA components are connected by chemical bonds.

Description

technical field [0001] The invention belongs to the technical field of organic polymer material preparation, and relates to a preparation method of a solvent-free anion / nonionic waterborne polyurethane-acrylate graft copolymer with an IPN structure. Background technique [0002] Polyurethane aqueous dispersion (PU) has excellent wear resistance, flexibility, adhesion and chemical resistance, but it has poor self-thickening property, low solid content, poor water resistance and gloss. Aqueous acrylate dispersion (PA) has excellent water resistance, weather resistance and physical and mechanical properties, but poor flexibility, wear resistance and chemical resistance. If the advantages of the two are organically combined to form complementary advantages, it can make The comprehensive performance of the material has been significantly improved. PUA is a hybrid aqueous dispersion prepared by preparing polyacrylate and polyurethane polymers in a microscopic state. It has the ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/62C08G18/44C08G18/42C08F222/16C09D175/06
Inventor 张育波秦中海阮伟明王炼石李柏文伍琪卓冯兆华
Owner GUANGDONG YATU CHEM
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