阅读说明：本技术 一种水性有机硅改性uv木器漆的制备方法 (Preparation method of water-based organic silicon modified UV wood lacquer ) 是由 曹冰 于 2018-05-12 设计创作，主要内容包括：本发明涉及一种水性有机硅改性UV木器漆的制备方法,其特征在于,首先将去离子水、填料加入至分散缸中1200-1800r/min高速分散均匀,然后加入活性氧化铝溶胶、有机硅UV树脂乳液、乙烯基硅油乳液、水性光引发剂、分散剂、流平剂在600-800r/min分散均匀,最后加入消泡剂200-400r/min分散均匀,即得A组分；然后,将A组分和含有乙烯基的硅烷偶联剂的B组分混合均匀,即得水性有机硅改性UV木器漆。本发明相对于现有技术,提高了木器漆的硬度、手感、疏水性、附着力、阻燃性能和耐酸碱性。(The invention relates to a preparation method of water-based organic silicon modified UV wood lacquer, which is characterized by comprising the steps of firstly adding deionized water and filler into a dispersion cylinder for high-speed dispersion at 1800r/min, then adding activated alumina sol, organic silicon UV resin emulsion, vinyl silicone oil emulsion, water-based photoinitiator, dispersant and flatting agent for uniform dispersion at 800r/min and 600 + and finally adding defoaming agent 200 + 400r/min for uniform dispersion to obtain a component A; and then, uniformly mixing the component A and the component B of the silane coupling agent containing vinyl to obtain the water-based organic silicon modified UV wood lacquer. Compared with the prior art, the invention improves the hardness, hand feeling, hydrophobicity, adhesive force, flame retardant property and acid and alkali resistance of the wood lacquer.)

1. A preparation method of water-based organic silicon modified UV wood lacquer is characterized in that deionized water and filler are firstly added into a dispersion cylinder for high-speed dispersion at 1800r/min, then active alumina sol, organic silicon UV resin emulsion, vinyl silicone oil emulsion, water-based photoinitiator, dispersant and flatting agent are added for uniform dispersion at 800r/min and 600 + 400r/min, and finally defoaming agent 200 + 400r/min is added for uniform dispersion to obtain component A; and then, uniformly mixing the component A and the component B of the silane coupling agent containing vinyl to obtain the water-based organic silicon modified UV wood lacquer.

2. The preparation method of the water-based organic silicon modified UV wood lacquer according to claim 1, characterized in that A, B two-component composition comprises the following components in parts by mass:

the component A comprises: 12-25 parts of activated alumina sol, 40-50 parts of organic silicon UV resin emulsion, 10-15 parts of vinyl silicone oil emulsion, 1-2 parts of water-based photoinitiator, 0.5-1 part of dispersing agent, 1-2 parts of flatting agent, 0.1-0.2 part of defoaming agent, 10-20 parts of deionized water and 0-25 parts of filler;

and B component: 3-5 parts of silane coupling agent containing vinyl.

3. The preparation method of the water-based organic silicon modified UV wood lacquer according to claim 1, characterized in that: the mass fraction of the vinyl silicone oil emulsion is 40%; the active alumina sol comprises 20-30% by mass of active alumina sol, and the active ingredient of the active alumina sol is feather-shaped alumina colloidal particles with positive charges, and the particle size of the active alumina sol is 10-30 nm.

4. The water-based organic silicon modified UV wood lacquer according to claim 1, characterized in that: the aqueous photoinitiator is at least one of 2, 2-azo-bis (2-amidinopropane), benzoyl methyl thiosulfate sodium salt and an aqueous sulfonate type benzophenone derivative.

5. The preparation method of the water-based organic silicon modified UV wood lacquer according to claim 1, characterized in that: the dispersant is at least one of polycarboxylic acid type anionic dispersant and nonionic high polymer aqueous dispersant; the defoaming agent is at least one of an organic silicon defoaming agent, fatty glyceride, phosphate and polyether ionic surfactant; the leveling agent is an organic silicon leveling agent.

6. The preparation method of the water-based organic silicon modified UV wood lacquer according to claim 1, characterized in that: the filler is at least one of superfine talcum powder, heavy calcium powder, light calcium powder, mica powder, kaolin, precipitated barium sulfate, silico-calcium powder and stearic acid.

7. The preparation method of the water-based organic silicon modified UV wood lacquer according to claim 1, characterized in that: the silane coupling agent containing vinyl is at least one of vinyl triisopropoxysilane and gamma- (methacryloyloxy) propyl trimethoxy silane.

8. The preparation method of the water-based organic silicon modified UV wood lacquer according to claim 1, characterized in that: the preparation method of the organic silicon UV resin emulsion comprises the following steps: adding 20-30 parts by mass of polyhydroxy silicone oil, 3-5 parts by mass of low hydrogen silicone oil, 25-30 parts by mass of maleic anhydride, 3-5 parts by mass of phthalic anhydride, 5-10 parts by mass of polyhydric alcohol, 10-15 parts by mass of ethylene glycol dimethyl ether, 5-10 parts by mass of ethylene glycol dibutyl ether and 0.1-0.5 part by mass of phosphorous acid into a reaction kettle, heating to 120 ℃, then heating to 220 ℃ at a speed of 5 ℃/h, keeping the temperature of 220-230 ℃ for 4-6 h until the acid value is 50-60 mgKOH/g, then cooling to 90 ℃, adding 6-9 parts by mass of neutralizing agent for neutralization for 30 min-1 h, then adding 40-60 parts by mass of water, and stirring and emulsifying at a high speed to obtain the organosilicon UV resin emulsion.

9. The preparation method of the water-based organic silicon modified UV wood lacquer according to claim 8, characterized in that: the viscosity of the polyhydroxy silicone oil is 20-50 mm²The mass percentage of the hydroxyl groups is 11-14%; the viscosity of the low hydrogen-containing silicone oil is 20-50 mm²The mass percentage of active hydrogen is 0.2-0.4%.

10. The preparation method of the water-based organic silicon modified UV wood lacquer according to claim 8, characterized in that: the polyalcohol is at least one of neopentyl glycol, propylene glycol, trimethylolpropane and pentaerythritol; the neutralizing agent is at least one of triethylamine, tributylamine, triethanolamine and dimethylethanolamine.

Technical Field

The invention relates to water-based wood paint, in particular to a preparation method of water-based organic silicon modified UV wood paint, and belongs to the technical field of water-based paint.

Technical Field

Most of active diluents used in the traditional solvent type UV curing are acrylic functional monomers, the volume shrinkage is large after curing, the adhesive force of a coating layer is influenced, and the active diluents have certain volatility and are harmful to human bodies. The water-based UV curing coating does not contain diluent monomer, but uses water as diluent, can solve the toxicity and irritation of volatile components, and is a development direction of the coating. However, compared with the traditional UV curing coating, the current domestic water-based UV curing coating synthetic emulsion is mostly prepared by taking toluene diisocyanate as a raw material, the double bond content and the relative molecular mass are too low, and the mechanical property is poor. With the increasing market requirements for the comprehensive properties of the water-based paint, the comprehensive properties such as abrasion resistance, chemical resistance, hardness and the like need to be further improved, and thus the performance of the water-based UV paint is in need.

Patent CN201510937909.4 relates to a water-based UV paint and a preparation method thereof, wherein the water-based UV paint is composed of the following raw materials in percentage by mass: 25-35% of polyurethane acrylate, 20-30% of epoxy acrylate, 5-10% of waterborne hyperbranched polyurethane, 5-10% of fluorocarbon resin, 5-15% of photoinitiator, 2-5% of dispersant and 2-10% of auxiliary agent. The polyurethane acrylate is fluorine-containing polyurethane acrylate, and the epoxy acrylate is a mixture of bisphenol A epoxy acrylate and aliphatic epoxy tetraacrylate; the preparation method of the water-based UV coating is simple in process, the prepared coating has good adhesion performance, hydrophobicity and water resistance, the curing speed is higher than that of the traditional UV coating, and bubbles are prevented from being generated in the curing process; meanwhile, the corrosion resistance, the aging resistance and the acid and alkali resistance of the coating are also obviously improved. However, the low double bond content still has the disadvantages of poor hardness and fullness.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide the water-based organic silicon modified UV wood lacquer and the preparation method thereof.

The water-based organic silicon modified UV wood lacquer is characterized by comprising A, B components, wherein the composition comprises the following components in parts by mass: the component A comprises: 12-25 parts of activated alumina sol, 40-50 parts of organic silicon UV resin emulsion, 10-15 parts of vinyl silicone oil emulsion, 1-2 parts of water-based photoinitiator, 0.5-1 part of dispersing agent, 1-2 parts of flatting agent, 0.1-0.2 part of defoaming agent, 10-20 parts of deionized water and 0-25 parts of filler; and B component: 3-5 parts of silane coupling agent containing vinyl.

Furthermore, the mass fraction of the vinyl silicone oil emulsion is 40%; the active alumina sol comprises 20-30% by mass of active alumina sol, and the active ingredient of the active alumina sol is feather-shaped alumina colloidal particles with positive charges, and the particle size of the active alumina sol is 10-30 nm.

Further, the aqueous photoinitiator is at least one of 2, 2-azo-bis (2-amidinopropane), benzoyl methyl thiosulfate sodium salt, quaternary ammonium salt type aqueous benzoic acid and aqueous sulfonate type dimethyl benzophenone derivatives.

Furthermore, the dispersant is at least one of polycarboxylic acid type anionic dispersant and nonionic high molecular water dispersant; the defoaming agent is at least one of an organic silicon defoaming agent, fatty glyceride, phosphate and polyether ionic surfactant; the leveling agent is an organic silicon leveling agent.

Furthermore, the filler is at least one of superfine talcum powder, heavy calcium powder, light calcium powder, mica powder, kaolin, precipitated barium sulfate, calcium silicate powder and stearic acid.

Furthermore, the silane coupling agent containing vinyl is at least one of vinyl triisopropoxysilane and gamma- (methacryloyloxy) propyl trimethoxy silane.

Further, activated alumina sol and vinyl silicone oil emulsion are commercially available.

Furthermore, the preparation method of the organosilicon UV resin emulsion comprises the following steps: adding 20-30 parts of polyhydroxy silicone oil, 3-5 parts of low hydrogen-containing silicone oil, 25-30 parts of maleic anhydride, 3-5 parts of o-phthalic anhydride, 5-10 parts of polyol, 10-15 parts of ethylene glycol dimethyl ether, 5-10 parts of ethylene glycol dibutyl ether and 0.1-0.5 part of phosphorous acid into a reaction kettle, heating to 120 ℃, then heating to 220 ℃ at a speed of 5 ℃/h, preserving the temperature for 4-6 h at 220-230 ℃ until the acid value is 50-60 mgKOH/g, then cooling to 90 ℃, adding 6-9 parts of neutralizing agent for neutralizing for 30 min-1 h, then adding 40-60 parts of water, and stirring and emulsifying at a high speed to obtain the organic silicon UV resin emulsion.

The viscosity of the polyhydroxy silicone oil is 20-50 mm²And the mass percentage of the hydroxyl groups is 11-14%.

The viscosity of the low hydrogen-containing silicone oil is 20-50 mm²The mass percentage of active hydrogen is 0.2-0.4%.

The polyalcohol is at least one of neopentyl glycol, propylene glycol, trimethylolpropane and pentaerythritol.

The neutralizing agent is at least one of triethylamine, tributylamine, triethanolamine and dimethylethanolamine.

Furthermore, the preparation method of the water-based organic silicon modified UV wood lacquer comprises the following steps: firstly, deionized water and filler are added into a dispersion cylinder for high-speed dispersion at 1800r/min of 1200-; and then, evenly mixing the A, B components to obtain the water-based organic silicon modified UV wood lacquer.

Compared with the prior art, the invention has the following advantages: (1) the active ingredient which can be crosslinked and solidified is feather-shaped active alumina silica sol with positive charges is added, so that the hardness and the flame retardant property of the wood lacquer are improved; (2) the organic silicon UV resin emulsion is synthesized, the emulsion is unsaturated organic silicon polyester resin emulsion, hydroxyl silicone oil and hydrogen-containing silicone oil are adopted for modification, vinyl silicone oil emulsion is adopted as an active diluent for the first time, the crosslinking density after UV curing is increased, and the hydrophobicity, the hand feeling and the acid and alkali resistance of the wood lacquer are greatly improved due to the synergistic effect of the hydroxyl silicone oil and the hydrogen-containing silicone oil; (3) the silane coupling agent containing vinyl is used as the component B, so that the adhesive force of the wood lacquer is improved, and simultaneously, the silane coupling agent participates in the photocuring process, and the hardness of the wood lacquer is improved.

Detailed Description

An aqueous silicone modified UV wood lacquer of the present invention is further described below with reference to the following examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention.