Composite ultraviolet solidified aqueous coating and preparation method thereof

Abstract

The invention discloses a compound UV-curable waterborne coating and the preparation method. The compound UV-curable waterborne coating in accordance with the invention is prepared by the following method: Firstly, epoxy-acrylate and polyurethane-acrylate are mixed, stirred for 0.5 to 4 hours, and then waterborne photoinitiator, organosilicon defoamer and waterborne preservative and mould proofingagents are added into the mixed solution and stirred for 0.5 to 2 hours, finally, dispersing agent is added to make the mixed solution disperse uniformly, wherein, the parts by weight of the components are as follows: epoxy-acrylate 10 to 70portions, polyurethane-acrylate 10 to 70 portions, waterborne photoinitiator 1.0 to 8.0 portions, organosilicon defoamer 0.05 to 1.0portions, waterborne preservative and mould proofing agents 0.3 to 2.0 portions, and dispersing agent 10 to 90portions. The invention has advantage of good performance, environmental protection and non-harm for human and environment, simultaneously; the curing effects meet the relevant national standards.

Description

Technical field:

[0001] The invention belongs to the field of light chemical industry, which can be UV-curable water-based paint and its preparation method, and in particular relates to a compound type UV-curable water-based paint and its preparation method. technical background:

[0002] UV-curable coatings are coatings that undergo rapid physical and chemical changes in a short period of time after being irradiated by ultraviolet light. It has the advantages of fast curing speed, energy saving, excellent coating performance, and wide application range for substrates. In addition, it does not contain volatile solvents, which is beneficial to eliminate VOC (Volatile Organic Content, volatile organic compounds) Environmental pollution is also conducive to saving organic solvents. However, since the main component used in UV-curable coatings, that is, the prepolymer, generally has a relatively high viscosity, reactive diluting monomers must be added before use to adjust its v...

Examples

Embodiment 1

[0027] Embodiment 1: at first prepare epoxy-acrylic acid ester: add epoxy resin, hydroquinone and N, N-dimethylaniline in the there-necked flask that separatory funnel and stirring device are housed, after stirring evenly, use Acrylic acid was slowly added dropwise through the liquid funnel, and the drop was completed within 1 hour. The temperature was raised to 60° C., stirred at a rotation speed of 100 rpm, reacted for 3 hours, and cooled to room temperature. The molar ratio of epoxy resin:acrylic acid is 1:1, hydroquinone accounts for 0.01% by mass of the total mixture, and N,N-dimethylaniline accounts for 0.1% by mass of the total mixture.

[0028] Then prepare polyurethane-acrylate: add polyoxypropylene glycol, dimethylol propionic acid and stir in a three-necked flask equipped with a separatory funnel and a stirring device, then add toluene diisocyanate and dibutyltin dilaurate, and heat up to 60 React at ℃ for 3 hours, then gradually add β-hydroxyethyl acrylate dropwise...

Embodiment 2

[0033] Embodiment 2: at first prepare epoxy-acrylic acid ester: add epoxy resin, hydroquinone and N, N-dimethylaniline in the there-necked flask that separatory funnel and stirring device are housed, after stirring evenly, use dividing Acrylic acid was slowly added dropwise into the liquid funnel, and the drop was completed within 3 hours. The temperature was raised to 100° C., stirred at a rotation speed of 150 rpm, reacted for 8 hours, and cooled to room temperature. The molar ratio of epoxy resin:acrylic acid is 1.4:1, hydroquinone accounts for 1% by mass of the total mixture, and N,N-dimethylaniline accounts for 2% by mass of the total mixture.

[0034] Then prepare polyurethane-acrylate: add polytetrahydrofuran diol and dimethylol propionic acid to a three-necked flask equipped with a separatory funnel and a stirring device and stir, then add 4,4'-diphenylmethane diisocyanate and octanoic acid sulfide Tin, heat up to 100°C and react for 8 hours, then gradually add acrylat...

Embodiment 3

[0039] Embodiment 3: first prepare epoxy-acrylic acid ester: add epoxy resin, hydroquinone and N, N-dimethylaniline in the there-necked flask that separatory funnel and stirring device are housed, after stirring evenly, use Acrylic acid was slowly added dropwise into the liquid funnel, and the drop was completed within 2 hours. The temperature was raised to 80° C., stirred at 120 rpm, reacted for 6 hours, and cooled to room temperature. The molar ratio of epoxy resin:acrylic acid is 1.2:1, hydroquinone accounts for 0.5% by mass of the total mixture, and N,N-dimethylaniline accounts for 0.8% by mass of the total mixture.

[0040] Then prepare polyurethane-acrylate: add polyethylene glycol, dimethylol propionic acid and stir in a three-necked flask equipped with a separating funnel and a stirring device, then add hexamethylene diisocyanate and stannous octoate, and heat up to 70 React at ℃ for 5 hours, after cooling, gradually add acrylate-β-hydroxypropyl ester dropwise, raise the...

Technical field:

[0001] The invention belongs to the field of light chemical industry, which can be UV-curable water-based paint and its preparation method, and in particular relates to a compound type UV-curable water-based paint and its preparation method. technical background:

[0002] UV-curable coatings are coatings that undergo rapid physical and chemical changes in a short period of time after being irradiated by ultraviolet light. It has the advantages of fast curing speed, energy saving, excellent coating performance, and wide application range for substrates. In addition, it does not contain volatile solvents, which is beneficial to eliminate VOC (Volatile Organic Content, volatile organic compounds) Environmental pollution is also conducive to saving organic solvents. However, since the main component used in UV-curable coatings, that is, the prepolymer, generally has a relatively high viscosity, reactive diluting monomers must be added before use to adjust its v...

Examples

Embodiment 1

[0027] Embodiment 1: at first prepare epoxy-acrylic acid ester: add epoxy resin, hydroquinone and N, N-dimethylaniline in the there-necked flask that separatory funnel and stirring device are housed, after stirring evenly, use Acrylic acid was slowly added dropwise through the liquid funnel, and the drop was completed within 1 hour. The temperature was raised to 60° C., stirred at a rotation speed of 100 rpm, reacted for 3 hours, and cooled to room temperature. The molar ratio of epoxy resin:acrylic acid is 1:1, hydroquinone accounts for 0.01% by mass of the total mixture, and N,N-dimethylaniline accounts for 0.1% by mass of the total mixture.

[0028] Then prepare polyurethane-acrylate: add polyoxypropylene glycol, dimethylol propionic acid and stir in a three-necked flask equipped with a separatory funnel and a stirring device, then add toluene diisocyanate and dibutyltin dilaurate, and heat up to 60 React at ℃ for 3 hours, then gradually add β-hydroxyethyl acrylate dropwise...

Embodiment 2

[0033] Embodiment 2: at first prepare epoxy-acrylic acid ester: add epoxy resin, hydroquinone and N, N-dimethylaniline in the there-necked flask that separatory funnel and stirring device are housed, after stirring evenly, use dividing Acrylic acid was slowly added dropwise into the liquid funnel, and the drop was completed within 3 hours. The temperature was raised to 100° C., stirred at a rotation speed of 150 rpm, reacted for 8 hours, and cooled to room temperature. The molar ratio of epoxy resin:acrylic acid is 1.4:1, hydroquinone accounts for 1% by mass of the total mixture, and N,N-dimethylaniline accounts for 2% by mass of the total mixture.

[0034] Then prepare polyurethane-acrylate: add polytetrahydrofuran diol and dimethylol propionic acid to a three-necked flask equipped with a separatory funnel and a stirring device and stir, then add 4,4'-diphenylmethane diisocyanate and octanoic acid sulfide Tin, heat up to 100°C and react for 8 hours, then gradually add acrylat...

Embodiment 3

[0039] Embodiment 3: first prepare epoxy-acrylic acid ester: add epoxy resin, hydroquinone and N, N-dimethylaniline in the there-necked flask that separatory funnel and stirring device are housed, after stirring evenly, use Acrylic acid was slowly added dropwise into the liquid funnel, and the drop was completed within 2 hours. The temperature was raised to 80° C., stirred at 120 rpm, reacted for 6 hours, and cooled to room temperature. The molar ratio of epoxy resin:acrylic acid is 1.2:1, hydroquinone accounts for 0.5% by mass of the total mixture, and N,N-dimethylaniline accounts for 0.8% by mass of the total mixture.

[0040] Then prepare polyurethane-acrylate: add polyethylene glycol, dimethylol propionic acid and stir in a three-necked flask equipped with a separating funnel and a stirring device, then add hexamethylene diisocyanate and stannous octoate, and heat up to 70 React at ℃ for 5 hours, after cooling, gradually add acrylate-β-hydroxypropyl ester dropwise, raise the...