CN102532967B - Rapid curing coating applicable to UV-LED (Ultraviolet-Light-Emitting Diode) light source and preparation method thereof - Google Patents

Abstract

The invention discloses a rapid curing coating applicable to a UV-LED (Ultraviolet-Light-Emitting Diode) light source. The coating comprises the following components in percentage by weight: 4-10 percent of a photoinitiator, 20-60 percent of a special oligopolymer, 10-50 percent of an active diluent, 6-12 percent of a promoter, 0.1-2 percent of an aid and 0-30 percent of a pigment. The rapid curing coating applicable to the UV-LED light source can be prepared by slowly stirring and mixing the components uniformly in sequence under the condition that sunlight or ultraviolet light irradiation is avoided and the relative air humidity is less than 70 percent, and keeping the temperature of a mixture below 50 DEG C in a stirring process. The rapid curing coating can be cured rapidly under low UV light intensity and energy, and has the characteristics of high luster, high adhesion and high wear resistance; the production efficiency of UV-LED photo-curing is increased to a great degree; and a highly-environmentally-friendly and highly-energy-saving UV-LED photo-curing technology is applied widely.

Description

One can be used for UV-LED light source fast-curing paint and preparation method thereof

Technical field

The present invention relates to one can be used for UV-LED light source quick-setting coating, particularly one and can be used for typographic photo-cured coating.

Background technology

The UV ultraviolet curing process that at present press is used mainly utilizes high voltage mercury lamp, metal halid lamp to mix hardenable coatings for light source again.Its shortcoming is that the large and thermal value of power consumption causes greatly producing the problems such as ozone in the damage of printing press and stock and use procedure.Attaching importance to environmental protection is the common trend of social development, limit the use of the traditional coating that VOC (volatile organic compounds) quantity discharged is high in many countries such as the U.S., Germany, Japan, Italy by legislation, progressively replaced traditional product with environmental friendly materials such as UV coating.On the other hand, due to its fast setting and energy-efficient without heated baking etc., be highly suitable for pipelining, the development in its market is with annual more than 25% speed increase.According to the prediction of German He Si company, by 2010, in world wide, the output of photo-cured coating will reach the more than 20% of whole surface-coated industry ultimate production.Visible UV photocuring technology has been applied to the industrialized production of commodity more and more, and its widespread use, for whole surface-coated industry has been brought once new revolution.

Although photocuring has this advantage of more than one, because present photo-cured coating adopts high voltage mercury lamp or metal halid lamp, also there is many shortcoming and defect in these traditional UV lamps.High voltage mercury lamp energy efficiency is low, and because set time is short, the power input of ultra violet bulb is large, and it is little to export ultraviolet power, so produce a large amount of heat-energy losses.In general ultra violet bulb power, change into ultravioletly only account for 20%, visible ray accounts for 10%, and infrared rays and heat energy account for 70%, the temperature of general mercuryvapour lamp tube wall can reach 600 ° of C left and right; Because its thermal value is large, larger for the printing of printable fabric and the heat affecting of printing press of the poor heat resistance such as plastic film, tend to cause distortion and the damage of base material; High voltage mercury lamp is short duration of service, and general maximum is 2000-3000 hour, and while approaching the later stage, ultraviolet generating capacity can reduce 15-20%, so want periodic cleaning reflector, needs often equipment to be changed to lamp and maintenance, has increased use cost; The ozone that high voltage mercury lamp produces can produce corrosion to equipment around, and ozone also has detrimentally affect to human respiratory, and high voltage mercury lamp contains mercury, pollutes the environment.Therefore this requirement has a kind of environmental protection more, energy-conservation novel UV curing mode.

Summary of the invention

The present invention mainly solves above-mentioned occurred problem, proposes a kind of energy and be suitable for the novel UV photo-cured coating of brand-new novel UV curing mode, can be used for the quick-setting coating of UV-LED light source.

The present invention solves the problems of the technologies described above the technical scheme proposing, and propose one and can be used for the quick-setting coating of UV-LED light source, by forming according to the component of weight percent meter below:

Special oligopolymer 20%-60%

Reactive thinner 10%-50%

Light trigger 4%-10%

Aided initiating 6%-12%

Auxiliary agent 0.1%-2%

Pigment 0-30%

Described special oligopolymer is sulfhydryl modified acrylic resin, comprising one or more of sulfhydryl modified epoxy acrylic tree, sulfhydryl modified polyurethane acrylic resin, sulfhydryl modified polyester acrylic resin, sulfhydryl modified polyacrylic resin.

Described reactive thinner is one or more of dipropylene glycol class diacrylate, tripropylene glycol class diacrylate, Viscoat 295, dipentaerythritol acrylate, 1,6 hexanediol diacrylate, pentaerythritol triacrylate, double pentaerythritol C5 methacrylate.

Described photosensitizers is that 1-hydroxycyclohexyl phenylketone, benzophenone, 2-hydroxy-methyl-phenyl-acetone, 2-hydroxy-2-methyl-1-are to hydroxyethyl ether benzylacetone, 2-Bian Ji-2-methylamino--1-(4-woods phenyl)-1-butanone, 2,4, the first base diphenyl phosphine oxide of 6-Three methyl Benzene first, two (2,4, the first base of 6-Three methyl Benzene first) phenyl phosphine oxide, one or more of sec.-propyl thia grace ketone.

Described aided initiating is one or more of aliphatic tertiary amine, ethanolamines amine, tertiary amine benzoate and reactive amines.

Described auxiliary agent is one or more of Siloxane-Oxyalkylene Copolymers, esters of acrylic acid flow agent, fluorine-carbon modified flow agent.

Described pigment is titanium dioxide, carbon black, bronze red (PR21), pigment Yellow 12 9(PY129), one or more in ultramarine, Pigment green (PG8).

This preparation method who can be used for the quick-setting coating of UV-LED light source, it is characterized in that there is successively following operation: avoiding daylight or UV-irradiation, relative air humidity to be less than under 70% condition, the aided initiating of the special oligopolymer that is slowly 20%-60% by weight percent content successively, 10%-50% reactive thinner, 4%-10% light trigger, 6%-12%, the auxiliary agent of 0.1%-2%, 0-30% pigment, be stirred to and mix, in whipping process, keep mixture temperature to be less than 50 DEG C;

Above-mentioned better stirring velocity is 500-700 rev/min, fully stirs 6-8 hour.

Major ingredient of the present invention contains special oligopolymer, this resin have versatility, can be under UV-LED lamp fast setting, prevent the features such as oxygen inhibition, with high glossiness, sticking power, excellent its of snappiness and solvent resistance showing; As good in the sticking power of plastics, metal to non-absorption stock, the coating after solidifying also embodies good chemical proofing and higher physical strength, has wide market application foreground.

Embodiment

Below in conjunction with specific embodiment, the invention will be further described.

1 one kinds of embodiment can be used for the curing coating of UV-LED light source, its component and weight percent content thereof be respectively: sulfhydryl modified polyurethane acrylic resin 43%, dipropylene glycol class diacrylate 22%, polyurethane acrylic resin 30%, 2, the first base diphenyl phosphine oxide 4.5% of 4,6-Three methyl Benzene first, Siloxane-Oxyalkylene Copolymers 0.15%, esters of acrylic acid flow agent 0.35%.

The preparation method of the curing coating of a kind of UV-LED of can be used for light source: this preparation method who can be used for the curing coating of UV-LED light source, it is characterized in that there is successively following operation: avoiding daylight or UV-irradiation, relative air humidity is less than under 70% condition, successively slowly by 43% sulfhydryl modified polyurethane acrylic resin, 10% polyurethane acrylic resin, 42% dipropylene glycol class diacrylate, 4.5% 2, 4, the first base diphenyl phosphine oxide of 6-Three methyl Benzene first, 0.15% Siloxane-Oxyalkylene Copolymers, 0.35% esters of acrylic acid flow agent, limit edged stirs, stir with the rotating speeds of 550 revs/min, fully stir 6 hours, in operating process, mixture temperature is 45 DEG C.　　

2 one kinds of embodiment can be used for the curing coating of UV-LED light source, its component and weight percent content thereof be respectively: sulfhydryl modified polyurethane acrylic resin 30%, dipropylene glycol class diacrylate 20%, polyurethane acrylic resin 25%, titanium dioxide 20%, 2, the first base diphenyl phosphine oxide 4.5% of 4,6-Three methyl Benzene first, Siloxane-Oxyalkylene Copolymers 0.15%, esters of acrylic acid flow agent 0.35%.

This preparation method who can be used for the curing coating of UV-LED light source, it is characterized in that there is successively following operation: avoiding daylight or UV-irradiation, relative air humidity is less than under 70% condition, successively slowly by 30% sulfhydryl modified polyurethane acrylic resin, 20% dipropylene glycol class diacrylate, 25% polyurethane acrylic resin, 20% titanium dioxide, 4.5% 2, 4, the first base diphenyl phosphine oxide of 6-Three methyl Benzene first, 0.15% Siloxane-Oxyalkylene Copolymers, 0.35% esters of acrylic acid flow agent, limit edged stirs, stir with the rotating speeds of 500 revs/min, fully stir 8 hours, in operating process, mixture temperature is 40 DEG C.

Claims (1)

1. can be used for the quick-setting coating of UV-LED light source, it is characterized in that, by forming according to the following component of weight percent meter below:

Special oligopolymer 20%-60%

Reactive thinner 10%-50%

Light trigger 4%-10%

Aided initiating 6%-12%

Auxiliary agent 0.1%-2%

Pigment 0-30%

Described special oligopolymer is sulfhydryl modified acrylic resin, comprising one or more of sulfhydryl modified epoxy acrylic resin, sulfhydryl modified polyurethane acrylic resin, sulfhydryl modified polyester acrylic resin, sulfhydryl modified polyacrylic resin;

Described reactive thinner is one or more of dipropylene glycol class diacrylate, tripropylene glycol class diacrylate, Viscoat 295, dipentaerythritol acrylate, 1,6 hexanediol diacrylate, pentaerythritol triacrylate, double pentaerythritol C5 methacrylate;

Described photosensitizers is one or both in benzophenone, TMDPO;

Described aided initiating is reactive amines;

Described auxiliary agent is one or more of Siloxane-Oxyalkylene Copolymers, esters of acrylic acid flow agent, fluorine-carbon modified flow agent.