RO126404A2 - Innovative photopolymerizable uv coating materials - Google Patents

Abstract

The invention relates to a photopolymerizable coating material. According to the invention, the material comprises 20...80% acrylic, methacrylic and epoxy oligomers, 25...50% a reactive solvent consisting of acrylic and/or methacrylic monomers, 1.5...8% a photoinitiator consisting of a 1:1 mixture of p-methoxybenzoylphenylphosphine-oxide and 2-hydroxy-2-methyl-1-phenylpropane, 0.1...8% fillers of nanopowders of the type of functionalized TiO, CoOor SiO, 4...30% pigments and 0.1...5% usual additives.

Description

THE STATE OFFICE FOR INVENTIONS THE MARK

Patent application No.

Date of filing

Polymerizable UV nanomaterial compositions for coatings also bear the name of 100% solid coating compositions intractable to UV radiation. In their formulation there are no volatile organic compounds, so at the polymerization the emission of volatiles is zero.

These types of materials, when applied, do not pollute the air, and can successfully replace coating materials based on organic solvents. Also, the polymerization with UV radiation is with a very low energy consumption compared to the polymerization of the compositions in which energy is needed to evaporate the solvent.

Solvent based coatings consist of resins, pigments, solvents and additives.

The resins can be: multifunctional resins (acrylic, vinyl, methane, polyester); thermo-adjustable resins (alkyl and epoxy) and oils and represents the non-volatile part of the binder with adhesion role, also determining the cohesion of the composition, influencing the brightness and resistance of the film to chemical agents.

The solvents used are chosen according to the resin and the type of composition and may be organic solvents (alcohol, esters, ketones, ethers, petroleum distillates, etc.) or water.

Organic solvents are used to uniformly disperse the colored composition on the coating surface and then evaporate. The emissions of organic solvents lead to the pollution of the environment entering the category of volatile organic pollutants of the air.

The use of water as a solvent in certain coating compositions leads to the reduction of air pollution, but for metallic coatings it can create oxidations called "court rust", because of the water that can evaporate during curing and drying, a process that can be reduced or eliminated upon curing. films by hot air or vacuum blowing, but the energy costs are much higher.

Coating compositions can also be in the form of thermo-adjustable powders, another way of solving volatile emissions into the atmosphere. The hardening of these compositions may be at temperature or UV radiation.

The production of these coatings is done in special furnaces for melting the resins and then when they are cured, they require time, high energy consumption, special arrangements.

The UV-reactive solid resins strengthen the composition and have the advantage of efficiently combining the low energy consumption characteristic of UV curing, with the advantage of their application by electrostatic spray.

The polymerizable UV nanomaterials described in this invention are 100% solid compositions that can be applied conventionally or by spray.

The innovative UV light-curing materials described in this invention have the following composition: acrylic oligomers, reactive diluents, photoinitiators, pigments, nanowires, additives.

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The coating compositions contain: 20-80% acrylic, methacrylic, epoxy oligomers; 25-50% reactive solvent consisting of acrylic or methacrylic monomers;

1.5-8% photoinitiators; 0.1–8% nanopowders; 4-30% pigments; 0.1-5% additions.

As acrylic oligomers are used:

- glycidyl methacrylate / 2-ethyl-hexyl acrylate / acrylic acid / butyl acrylate

- acrylic acid / methyl methacrylate / 2-ethyl-hexyl acrylate / butyl acrylate.

The reactive diluents in the coating compositions are used according to the invention: trimethylolpropantriacrylate, ethylene glycol dimethylacrylate / butyl acrylate.

The addition of TiO ₂ Co ₃ O ₄ , SiO ₂ nanopowders in the composition improves the quality of the film both in resistance to chemical agents and hardness.

Pigments are used titanium dioxide, molybdenum red, CO3O4

The coating materials are made in ultrasonic homogenizers at room temperature in red light.

Example 1

Formulations of photoreticulable UV coating material

- acrylic / epoxy oligomers: 58.9% butyl acrylate / 2-ethyl-hexyl acrylate / glycidyl methacrylate / acrylic acid

- reagent diluent: 24.32% butyl acrylate / trimethylolpropantriacrylate / DMMEG ratio 0.5: 2.25: 0.25

- photoinitiators: 4.2%

- p-methoxybenzyldiphenylphosphinoxide

- 2-hydroxy - 2-methyl-1-phenyl propanone in 1: 1 ratio

- coinitiator

- triethylamine: 2.1%

- nanowires: 1.43%

- 0.25% SiO ₂

- 1.18% TiO ₂ functionalized with methyl methacrylate.

- TiO ₂ pigment: 5%

- Dispersing 182: 1.55%

- Additive Ceara MF5010: 2.5%

Example 2

Photopolymerizable UV coating formulations

- acrylic / epoxy oligomers: 61.21% butyl acrylate / 2-ethyl hexyl acrylate / glycidyl methacrylate / acrylic acid

- reagent diluent: 18.76% trimethylolpropantriacrylate / dimethylacrylate of monoethylene glycol in a ratio 3.5: 0.5

- photoinitiators: 4.5%

- p - methoxybenzyldiphenylphosphinoxide

- 2-hydroxy-2-methyl-1-phenyl propanone in 1: 1 ratio

- co-issuer: 2.28%

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- Trieti lamina

- Ν, Ν dimethylaminoethylmethacrylate

- nanowires: 3.7%

- 3.5% SiO ₂

- 0.2% CO3O4 functionalized with methyl methacrylate

- pigment: 7.8%

Co3O4

- Bentonite dispersant 1.75%

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Claims (3)

1. The light-curing UV coating material contains; 20-80% acrylic, methacrylic, epoxy; 25 - 50% reactive solvent consisting of acrylic and / or methacrylic monomers; 1.5 - 8% photoinitiator; 0.1 - 8% nanopowders; 4 - 30% pigments; 0.1-5% other additions. The coating material according to claim no. Contains as photoins 1: 1- p-nietoxybenzyldifcniltbsphinoxide mixture: 2-hydroxy-2-methyl-1-fcnylpropane The photopolymerizable UV coating material according to claim no. 1 contains dc nanowires TiO · type. CO3O4, SiCl moiety: methyl methacrylate, hydroxyethylmtacrylate. dimetilaminoetilmelacrilat.