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Acrylic hyperbranched resin and application thereof in mirror back paint
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A technology of hyperbranched resin and acrylic acid, which is applied in the direction of coating, etc., can solve the problems of water resistance and salt spray resistance, and achieve the effect of good water resistance, fast drying speed and excellent quality
Inactive Publication Date: 2013-01-16
常州市弘可利办公用品有限公司 +1
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However, the mirror back paint is baked quickly at low temperature, and the hydroxyl groups of the acrylic resin are often not completely cross-linked with the amino resin, and the free hydroxyl and carboxyl groups lead to a decrease in water resistance and salt spray resistance.
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Embodiment 1
[0036] The preparation of embodiment 1 acrylic acid hyperbranched resin
[0037] ATRP technology synthesizes acrylic acid hyperbranched resin containing a large number of active double bonds.
[0038] According to the composition of four kinds of acrylic acid hyperbranched resins listed in Table 1, each monomer was weighed and mixed respectively. Values in the table are parts by weight:
[0039] Table 1 Composition of four kinds of acrylic acid hyperbranched resins
[0040]
[0041] There are many possible formulations, and the above formulations are only four references, and the present invention is not limited to these four formulations.
[0042] The polymerization reaction was carried out feeding intake according to the contents listed in Table 2.
[0045] The choice of solvents, initiators, catalysts and ligands is within the ordinary skill of a person of ordinary skill in the art. Commonly availa...
Embodiment 2
[0047] The preparation of embodiment 2 mirror back paint curtain coating
[0048] The primer and topcoat were prepared respectively according to the contents listed in ingredients table 3 and table 4.
[0049] Table 3 Primer Coating Material List
[0050]
[0051] Total weight of primer: 100 kg. Solid content 65±2%, viscosity: 100-150s (Tu-4 cups, 25°C).
[0052] Solid content refers to the weight fraction of solids in the resin or coating.
[0053] Table 4 list of topcoat materials
[0054]
[0055] Total weight of top coat: 100 kg. Solid content 65±2%, viscosity: 100-150s (Tu-4 cups, 25°C).
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Abstract
The invention relates to an acrylic hyperbranched resin which is obtained by 50-70wt% of monofunctional vinyl monomer, 20-40wt% of bifunctional vinyl monomer and 5-10wt% of double-bond titanate coupling agent through copolymerization by an atom transfer free radical polymerization method. The monofunctional vinyl monomer and the bifunctional vinyl monomer are copolymerized with the double-bond titanate coupling agent together to enable the acrylic hyperbranched resin to have the excellent properties of quick drying speed, high hardness, good water resistance, good salt fog resistance, good corrosion resistance, excellent adhesion, and the like. Moreover, the mirror back paint is constructed by a spraying way, and because the system only has one kind of resin, the conditions of influencingthe construction, such as curtain rupture, air bubbles, and the like, can not occur.
Description
technical field [0001] The invention relates to a hyperbranched resin, in particular to an acrylic hyperbranched resin, and it is used as a main component in mirror back paint. Background technique [0002] According to the different metal materials used in the mirror, it can be divided into two types: aluminum mirror and silver mirror. The aluminum mirror is vacuum sputtered aluminum film on the back of the glass as a reflective layer; the silver mirror is first coated with a layer of metallic silver on the glass surface as a reflective layer by chemical methods, and then coated with a layer of copper on the silver film to increase the silver film. The reflective effect and play a role in protecting the silver film. No matter which process is used, a protective coating, also known as mirror back paint, needs to be applied on the surface of the metal layer at the end. [0003] Mirror back paint is required to have excellent construction performance, that is, fast curing (q...
Claims
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Application Information
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