CN101210094A - Resin composition and preparation method thereof - Google Patents

Abstract

The invention discloses a resin composition and a preparation method thereof. The resin composition comprises electrosilvering resin, silver paste and thinner, as well as vinyl acetate resin or / and an addition agent; the components are prepared by the following steps: (a) the electrosilvering resin is dissolved in the thinner to form solution; (b) the silver past is added into the solution and uniformly stirred to form serous fluid; (c) the serous fluid is filtered, and then the resin composition is obtained after the dregs are eliminated. The resin composition prepared by the method can effectively improve the brightness of silver.

Description

A kind of resin combination and preparation method thereof

Technical field

The present invention relates to resin combination of a kind of highlighted silver coating as ultraviolet light polymerization finish paint coating and preparation method thereof.

Background technology

At present, as the aluminum-bronze paint of ultraviolet light polymerization finish paint priming paint, be main film forming substance with general acrylic resin, make according to the following steps: (1) joins fully dissolving in the organic solvent with this filmogen; (2) in above-mentioned solution, add the silver slurry, stir; (3), obtain this resin combination after removing residue with this dope filtration.But its silver-colored brightness of such coating is general.In order to increase the brightness of coating, general processing mode is to add celluosic resin in coating, and as nitrocellulose (NC), cellulose acetate butyrate (CAB) etc., this celluosic resin can improve the arrangement of aluminium powder, improved its silver-colored brightness to a certain extent, but do not improved a lot.

Summary of the invention

Technical problem to be solved by this invention provides a kind of resin combination and preparation method thereof, and this resin combination can effectively improve bright as silver degree.

The resin combination that embodiments of the invention provide comprises electrosilvering resin (unit weight part, as follows) 30-50, silver slurry 3-8, thinner 30-50.

The electrosilvering resin is the acrylic resin of modification.

Also comprise vinyl chloride-vinyl acetate resin 0.1-10.

Also comprise auxiliary agent 0.1-5.

Wherein the content of vinyl chloride-vinyl acetate resin is 1-6.

Wherein thinner is selected from one or both or the two or more materials in toluene, ethyl acetate, butylacetate, isobutyl acetate, propyl acetate, ethanol, propyl carbinol, pimelinketone, dimethylbenzene, hexone, acetone, methylethylketone, butyl glycol ether, the propylene glycol butyl ether.

Wherein auxiliary agent comprises flow agent, auxiliary rheological agents and wetting dispersing agent.

The content of described flow agent is 0.1-2, and the content of described auxiliary rheological agents is 0.5-5.0, and the content of described wetting dispersing agent is 0.1-1.0.

The acrylic resin of modification is the acrylic resin of fluorine modification or the acrylic resin of polyester modification.

The invention also discloses a kind of method for preparing above-mentioned composition, this method comprises by following steps to be formed:

(c) the electrosilvering resin dissolves is formed solution in described thinner;

(d) add the silver slurry in above-mentioned solution, the formation slurries stir;

(c), obtain this resin combination after removing residue with this dope filtration.

Above steps all is to carry out under normal temperature and normal pressure.

In above-mentioned resin combination, the electrosilvering resin is a filmogen, and it is a kind of special modified acrylic resin, it can make aluminium powder swim in the surface of filming, promote aligning of aluminium powder, improved silver-colored brightness greatly, making films reaches effect as the electrosilvering.

Embodiment

The present invention will be further described below by embodiment and Comparative Examples.

The resin combination that embodiments of the invention provide comprises electrosilvering resin (unit weight part, as follows) 30-50, silver slurry 3-8, thinner 30-50.

The electrosilvering resin is the acrylic resin of modification, as the acrylic resin of fluorine modification, polyester modification acrylic resin etc.

Electrosilvering resin of the present invention can adopt A-830S, A-850, the A-850A of commercial BSK, record a kind of among EMR-1675, the EMR-1677 grind of the D133 of Britain SUK, D136, EMR.

Thinner is an organic solvent, and described thinner is selected from one or more in toluene, ethyl acetate, butylacetate, isobutyl acetate, propyl acetate, ethanol, propyl carbinol, pimelinketone, dimethylbenzene, hexone, acetone, methylethylketone, butyl glycol ether, the propylene glycol butyl ether.The kind of organic solvent and consumption should be able to fully dissolve described filmogen, and will have good volatility.Based on this, be preferably two or more the mixture in toluene, ethyl acetate, butylacetate, isobutyl acetate, propyl acetate, ethanol, propyl carbinol, pimelinketone, dimethylbenzene, hexone, acetone, methylethylketone, butyl glycol ether, the propylene glycol butyl ether.

In the above-described embodiment, the addition of described organic solvent should satisfy the dilution requirement of electrosilvering resin, also must be fit to the spraying coating process of coating on viscosity, so, be benchmark with the total amount of coating, the content of described organic solvent is 30-50 unit weight part.

The silver slurry that embodiment among the present invention uses is common silver slurry, can be selected from the 5660NS of commercial Japanese Japan, and 6900 of Su Lunke likes 385,2194 of card, family emerging 9640,9650 in a kind of; The addition of silver slurry is advisable with 3-8 unit weight part, so makes the composition of present embodiment that good sticking power is not only arranged, and keeps good opacifying power simultaneously.

Vinyl chloride-vinyl acetate resin can also be added in the foregoing description and the performance of filming can be improved, as anti-alcohol, wear-resisting etc., can be selected from the E15/45M of commercial Eastman company, the VINNOL LL4320 of Germany WACKER, the UCAR VAGH of U.S.'s associating carbonization and UCAR VAGK, among the T-33 of Canada BSK company one or more, addition with content be 0,1-10 serve as suitable, is preferably 1-6.

Also can comprise auxiliary agent 0-5 in the foregoing description, described auxiliary agent comprises flow agent, auxiliary rheological agents and wetting dispersing agent, gross weight with this resin combination is a benchmark, by unit weight part, the content of described flow agent is 0.1-2, the content of described auxiliary rheological agents is 0.5-5.0, and the content of described wetting dispersing agent is that the adding of 0.1-1.0 flow agent can make paint film smooth, smooth, even, reaches the ideal decorative effect; The effect of auxiliary rheological agents is to protect dispersive granules of pigments, prevents the pigment sedimentation, and the stability that helps storing helps sagging control, keeps good levelling property; The effect of wetting dispersing agent is to prevent that pigment from producing harmful flocculation, improves the dispersiveness of pigment in resin solution, makes dispersion system stable.

In each above-mentioned set of dispense ratio, each component is an optional numerical value in restricted portion, makes up, and all can reach the effect that increases brightness.

Resin combination provided by the invention is suitable for various materials, particularly plastic fittings, as various plastics keyboards, handset shell, portable computer external etc. as ultraviolet light polymerization finish paint priming paint.Generally before spraying be spraying again after 1: 1 the dilution proportion according to weight ratio with described resin combination and described thinner, coating thickness is generally the 5-14 micron, 60-70 ℃ of oven dry 15-25 minute.

Embodiments of the invention also disclose the method for preparing above-mentioned resin combination, are made up of following steps successively:

One, under normal temperature and normal pressure, prepares resin combination A1-A3 provided by the invention according to the following steps.

(1), is stirred to abundant dissolving with electrosilvering resin, vinyl chloride-vinyl acetate resin, flow agent, auxiliary rheological agents, wetting dispersing agent and mixing diluents; (2) in the mixture that step (1) obtains, add the silver slurry, stir, form slurries; (3) filter the slurries that obtain, to remove residue wherein.

Two, under normal temperature and normal pressure, prepare reference resin combination B1-B3 according to the following steps.

(1) acrylic resin, celluosic resin, flow agent, auxiliary rheological agents, wetting dispersing agent are mixed with dilution ` agent, be stirred to abundant dissolving;

(2) in the mixture that step (1) obtains, add the silver slurry, stir;

(3) filter the slurries that obtain, to remove residue wherein.

Will the reaction one resin combination A1-A3 that obtains, the reaction two reference coating B1-B3 that obtain are sprayed at respectively on the plastic casing, and 65 ℃ of oven dry spraying ultraviolet light polymerization varnish after 20 minutes, and through UV-irradiation 25 seconds obtains thickness and is 10 microns solidifying film layer.

For understanding the performance of above-mentioned resin combination A1-A3 and reference coating B1-B3, above-mentioned solidifying film layer has been carried out sticking power test and luminance test, the result is as shown in table 3.

Carrying out the method that sticking power test adopted is: draw 100 1 millimeter * 1 millimeter square lattice at sprayed surface with drawing a lattice device, the model of producing with Minnesota Mining and Manufacturing Company is 600 smooth being bonded on the grid of scotch tape, do not stay a space, vertically uncover with utmost dispatch then, observe cut edge and have or not depainting.Is 5B as the depainting amount between 0-5%, is 4B between 5-10%, is 3B between 10-20%, is 2B between 20-30%, is B between 30-50%, is being 0B more than 50%.

Luminance test: the production standard colour table, measure the L value (brightness value) of the coating B1-B3 that coating A1-A3 that embodiment 1-3 obtains and Comparative Examples obtain by color difference meter (precision 0.001).

By table 3 as can be seen, resin combination provided by the present invention compare with the resulting reference coating of Comparative Examples silver brightness be significantly improved.

Table 1

	Embodiment 1	Embodiment 2	Embodiment 3
				Filmogen	Electrosilvering resin D136	Electrosilvering resin D136	Electrosilvering resin D136

	48g	48g	48g
				Flow agent	0.2g	0.2g	0.2g
Wetting dispersing agent	0.8g	0.8g	0.8g
				The silver slurry	Su Lunke 6900 3g	Su Lunke 6900 5g	Su Lunke 6900 7g
Organic solvent	48g	46g	44g

Table 2

	Comparative Examples 1	Comparative Examples 2	Comparative Examples 3
				Filmogen	Acrylic resin 45g	Acrylic resin 45g	Acrylic resin 45g
Celluosic resin	0g	Cellulose acetate butyrate 2g	Cellulose acetate butyrate 5g
				Flow agent	0.2g	0.2g	0.2g
Wetting dispersing agent	0.8g	0.8g	0.8g
				The silver slurry	Su Lunke 6900 5g	Su Lunke 6900 5g	Su Lunke 6900 5g
Organic solvent	49g	47g	44g

Table 3

	Finish code	Sticking power	Brightness L value
				Embodiment 1	A1	5B	94.831

Embodiment 2	A2	5B	95.089
				Embodiment 3	A3	5B	94.913
Comparative Examples 1	B1	5B	88.776
				Comparative Examples 2	B2	5B	89.690
Comparative Examples 3	B3	5B	89.973

Brightness L value by each embodiment of table 3 and Comparative Examples can be found out: the present invention can effectively improve the brightness of paint film silver really.

Claims (10)

1. a resin combination is characterized in that: by unit weight part, comprise electrosilvering resin 30-50, silver slurry 3-8, thinner 30-50.

2. resin combination according to claim 1 is characterized in that: the electrosilvering resin is the acrylic resin of modification.

3. resin combination according to claim 1 and 2 is characterized in that: by unit weight part, also comprise vinyl chloride-vinyl acetate resin 0.1-10.

4. resin combination according to claim 3 is characterized in that: by unit weight part, also comprise auxiliary agent 0.1-5.

5. resin combination according to claim 4 is characterized in that: wherein the content of vinyl chloride-vinyl acetate resin is counted 1-6 by unit weight part.

6. resin combination according to claim 5 is characterized in that: wherein thinner is selected from one or both or the two or more materials in toluene, ethyl acetate, butylacetate, isobutyl acetate, propyl acetate, ethanol, propyl carbinol, pimelinketone, dimethylbenzene, hexone, acetone, methylethylketone, butyl glycol ether, the propylene glycol butyl ether.

7. resin combination according to claim 6 is characterized in that: wherein auxiliary agent comprises flow agent, auxiliary rheological agents and wetting dispersing agent.

8. resin combination according to claim 7 is characterized in that: the content by the described flow agent of unit weight part is 0.1-2, and the content of described auxiliary rheological agents is 0.5-5.0, and the content of described wetting dispersing agent is 0.1-1.0.

9. resin combination according to claim 2 is characterized in that: the acrylic resin of modification is the acrylic resin of fluorine modification or the acrylic resin of polyester modification.

10. one kind prepares the as above method of the resin combination of claim, it is characterized in that this method comprises by following steps to form:

(a) the electrosilvering resin dissolves is formed solution in described thinner;

(b) add the silver slurry in above-mentioned solution, the formation slurries stir;

(c), obtain this resin combination after removing residue with this dope filtration.

Above steps all is to carry out under normal temperature and normal pressure.