The content of the invention
The purpose of the present invention, is exactly to solve the above-mentioned problems and provides a kind of aqueous UV base coat, the aqueous UV base coat
In activity double key, ultraviolet light-initiated radical polymerization is participated in the glossy solidification process in UV faces, so that in base oil and UV faces
Riveting formula structure is formed between oil, strengthens adhesive force of the UV faces oil in base oil, and then it is attached in printing paper to strengthen UV gloss oil
Put forth effort.
Another object of the present invention, which also resides in, provides a kind of preparation method of aqueous UV base coat.
To achieve the above object, technical scheme is implemented as follows:
A kind of aqueous UV base coat of the present invention, including following components and its weight percent content:
The sum of percentage by weight of above-mentioned raw materials is 100%;
The water-base resin with activity double key, the quantity of its activity double key account for all chemical bond quantity of the water-base resin
Percentage be 5-10%.
A kind of above-mentioned aqueous UV base coat, wherein, it by glass transition temperature is -20-5 that the aqueous acrylic emulsion, which is,
DEG C aqueous acrylic emulsion A and glass transition temperature be that 50-80 DEG C of aqueous acrylic emulsion B is mixed.
A kind of above-mentioned aqueous UV base coat, wherein, the aqueous acrylic emulsion A is by the raw material of following percentage by weight
It is polymerized:
Alkali soluble resins:5.0-20.0%;
Mass percent concentration is 25% ammonium hydroxide:2.0-8.0%;
Initiator:0.1-1.0%;
Styrene:5.0-18.0%;
Butyl acrylate:15.0-38.0%;
Acrylic acid:0-2.0%;
Hydroxy-ethyl acrylate:0-5.0%;
Deionized water:50.0-60.0%;
The sum of percentage by weight of above-mentioned raw materials is 100%.
A kind of above-mentioned aqueous UV base coat, wherein, the aqueous acrylic emulsion B is by the original of following percentage by weight
Material is polymerized:
Alkali soluble resins:5.0-20.0%;
Mass percent concentration is 25% ammonium hydroxide:2.0-8.0%;
Initiator:0.1-1.0%;
Styrene:0-40.0%;
Methyl methacrylate:0-40.0%;
Butyl acrylate:0-10.0%;
Acrylic acid:0-2%;
Hydroxy-ethyl acrylate:0-5%;
Deionized water:50-60%;
The sum of percentage by weight of above-mentioned raw materials is 100%.
A kind of above-mentioned aqueous UV base coat, wherein, the mass percent concentration be 35% alkali soluble resins solution in,
As 50-130 DEG C of the glass transition temperature of the alkali soluble resins of solute, molecular weight 2000-20000, acid number 150-
300mgKOH/g, the lye as solvent are the ammonium hydroxide that mass percent concentration is 25%.
A kind of above-mentioned aqueous UV base coat, wherein, the water-base resin with activity double key, including with activity double key
Water-based emulsion or alkali solubility macromolecule oligomer with activity double key.
A kind of above-mentioned aqueous UV base coat, wherein, the water-based emulsion with activity double key is selected from styrene-butadiene latex or carboxylic
Base styrene-butadiene latex;The alkali solubility macromolecule oligomer with activity double key is selected from polyethyleneglycol diacrylate, polyurethane
Polyurethane aqueous dispersion body acrylic resin modified or with activity double key.
Present invention also offers a kind of preparation method of the aqueous UV base coat with excellent adhesive attraction, comprise the following steps:
Step 1:Prepare raw material according to following components and its weight percent content:Aqueous acrylic emulsion 50.0-
70.0%, mass percent concentration is 35% alkali soluble resins solution 0-30%, the water-base resin 10- with activity double key
20%, coalescents 0-2%, defoamer 0.1-0.5%, moistening flatting agent 0.1-1.5%, deionized water 0-30%;
Step 2:First aqueous acrylic emulsion is poured into a clean container under the mixing speed of 500-800r/min, according to
The secondary alkali soluble resins solution, the water-base resin with activity double key, defoamer for adding mass percent concentration and being 35%,
0.5-1h is stirred under the mixing speed of 800-1200r/min;
Step 3:Coalescents, moistening flatting agent and deionized water is slowly added dropwise successively again, in turning for 300-500r/min
The lower stirring defoaming of speed, 200 mesh filter and package, up to aqueous UV base coat finished product.
Beneficial effects of the present invention are as follows:
1. mixed emulsion can be adjusted by adjusting the ratio of aqueous acrylic emulsion A and aqueous acrylic emulsion B
The various performances such as resistance to blocking, pliability are to meet the various performance requirements of process.
2. the effect of the water-base resin with activity double key is to make water borne base and UV by the glossy curing reaction of scope of participants
The link of covalent bond is produced between top layer, there is provided good combination power, forms riveting formula structure between base oil and UV faces oil, so that
Improve adhesive force.
3. material provided by the invention has excellent adhesion property.It is made after aqueous UV base coat finished product, passes through GB/T
Method as defined in 9286-1998 carries out adhesive force test, and obtained result is 0-1 grades.
Embodiment 4
First the aqueous acrylic emulsion B of 40% aqueous acrylic emulsion A and 28% is mixed, 500-800r/min's
The aqueous acrylic emulsion mixed is poured into a clean container under mixing speed, sequentially adds 10% mass percent concentration
Alkali soluble resins solution, 8% ethoxyquin trimethylolpropane tris propylene, 0.5% defoamer for 35% and 1.5%
Moistening flatting agent, 0.5-1h is stirred under the mixing speed of 800-1200r/min;2% diethylene glycol is slowly added dropwise successively again
Monobutyl ether coalescents and 10% deionized water, stir defoaming under the rotating speed of 300-500r/min, and 200 mesh filter and package,
Up to aqueous UV base coat finished product.
Product obtained in comparative example 1, and embodiment 1-4 is carried out according to method as defined in GB/T 9286-1998
Adhesive force is tested.Art post paperboard is printed using 200 grams of five colors, on different aqueous UV base coats, the adhesive force test knot of UV faces oil
Fruit see the table below:
Project |
Adhesive force is graded |
Comparative example 1 |
2 |
Embodiment 1 |
1 |
Embodiment 2 |
0 |
Embodiment 3 |
1 |
Embodiment 4 |
0 |
By upper table, it is clear that the more traditional water-based gloss oil increase of the aqueous UV base coat of the present invention is with active double
The water-base resin of key, is tested by adhesive force, and adhesive force significantly improves.
Meanwhile the activity double key in aqueous UV base coat of the invention, participation ultraviolet light draws in the glossy solidification process in UV faces
The radical polymerization of hair, so as to form riveting formula structure between base oil and UV faces oil, strengthens adhesive force of the UV faces oil in base oil,
And then strengthen adhesive force of the UV gloss oil in printing paper.
Above example is used for illustrative purposes only, rather than limitation of the present invention, the technology people in relation to technical field
Member, without departing from the spirit and scope of the present invention, can also make various conversion or modification, therefore all equivalent
Technical solution should also belong to scope of the invention, should be limited by each claim.