One exempts from Lacquer finish automotive hub silver paint and preparation method thereof
Technical field
The present invention relates to one and exempt from Lacquer finish automotive hub silver paint, and the preparation method of this automotive hub silver paint, belong to paint field.
Background technology
Automotive hub is an important component part of automobile component, and along with the growth of Chinese automobile Parts mapping, wheel hub industry is developed gradually.According to " prediction of 2013-2017 Chinese automobile wheel hub industry market is reported with investment strategy planning application ", data presentation is since 2010, and the macro economic policy based on promote domestic demands, for the stable development of automobile industry provides the foundation and guarantee.From automobile market tendency in 2010, the impact of macro economic policy on automobile market has run through the whole year, annual automobile volume of production and marketing reaches 1826.47 ten thousand and 1806.19 ten thousand respectively, and production and marketing creates the highest again, and continues to keep the first in the world automobile production and country of consumption status.Within 2011, economic continuation keeps steady growth, and automobile production and marketing situation is expected to continue to obtain larger amplification; Within 2011, Chinese automobile output is expected to breakthrough 2,000 ten thousand, within 2015, reaches 2,500 ten thousand.On long terms, the quick growth of China's GDP is that automobile industry provides wide demand space, and the growth with automobile sales volume increases by the demand of automotive hub.A few years from now on Chinese automobile sales volume is expected to sustained, stable growth, for automotive hub industry provides the opportunity of development.
In order to reach the requirement of protection and decoration, automotive hub all will be coated with and load onto silver powder polychromatic finish, general auxiliary plan is anaphoretic priming, amino silver powder metallic finishes and amino coating varnish.Due to multiple tracks construction, complex process, coating process fraction defective is high, and production efficiency is low, and production cost is high.If finish paint can once shaped without Lacquer finish, just will reduce coating process, raising operating efficiency, thus reduce costs.
Summary of the invention
One is the object of the present invention is to provide to exempt from Lacquer finish automotive hub silver paint and preparation method thereof.
The technology used in the present invention solution is:
One exempts from Lacquer finish automotive hub silver paint, and it is grouped into by the one-tenth of following weight: acrylic resin 40-45 part, vibrin 14-16 part, cellulose acetate butyrate solution 10-15 part, polyamide wax pulp 0.5-2 part, aminoresin 14-15 part, masked isocyanate resin 2-3 part, flow agent 0.4-0.6 part, aluminum paste 5-7 part, mixed solvent 6-7 part.
Preferably, the weight of each composition is: acrylic resin 43 parts, 15 parts, vibrin, cellulose acetate butyrate solution 12 parts, polyamide wax pulp 1 part, 14.3 parts, aminoresin, masked isocyanate resin 2 parts, flow agent 0.5 part, aluminum paste 6 parts, mixed solvent 6.2 parts.
Preferably, described mixed solvent is grouped into by the one-tenth of following weight: dimethylbenzene 30-40 part, N-BUTYL ACETATE 20-25 part, propyl carbinol 20-30 part, pimelinketone 8-12 part, DBE4-6 part.
Preferably, described acrylic resin select solid content be 75% thermosetting acrylic resin, its acid number is lower than 5mgKOH/g.
Preferably, described vibrin select solid content be 80% saturated polyester resin.
Preferably, described cellulose acetate butyrate solution is dissolved in N-BUTYL ACETATE by CAB551-0.01 formulated, and concentration is 25%.
Preferably, described aminoresin select solid content be 80% high imino-methyl-etherified melamine resin.
Preferably, described masked isocyanate resin select solid content be 75% HDI type blocked polyisocyanate, NCO content is 10.0-11.5%.
Preferably, the particle diameter of described aluminum paste is 25-45 μm.
The above-mentioned preparation method exempting from Lacquer finish automotive hub silver paint, comprises the following steps:
A1 takes acrylic resin, vibrin, cellulose acetate butyrate solution, masked isocyanate resin, polyamide wax pulp, aminoresin, flow agent, aluminum paste and mixed solvent by above-mentioned weight;
Acrylic resin, vibrin, cellulose acetate butyrate solution, polyamide wax pulp, masked isocyanate resin, aminoresin and flow agent input paint mixing tank high speed is dispersed to fineness and is less than 25 μm by a2;
Aluminum paste mixed solvent dilutes by a3, stirs, and then adds in step a2 paint mixing tank, and dispersion 20-30min, must exempt from Lacquer finish automotive hub silver paint.
Preferably, described mixed solvent is mixed by the composition of following weight: dimethylbenzene 30-40 part, N-BUTYL ACETATE 20-25 part, propyl carbinol 20-30 part, pimelinketone 8-12 part, DBE4-6 part.
Advantageous Effects of the present invention is:
The present invention is by improveing matrix resin, and obtained automotive hub silver paint gloss is high, and fullness ratio is good, reaches the effect of coating varnish, removes coating varnish operation from, saves the production cost of client, increases work efficiency and reduce spraying fraction defective.
What the present invention researched and developed exempts from Lacquer finish automotive hub silver paint, if promoted on a large scale, not only can save production cost, increase work efficiency, owing to decreasing one coating process, also for significant contribution is made in energy-saving and emission-reduction.
This project construction is complete put into effect after, only with the customer group that company has at present, annual requirement is at about 300 tons.By with similar products at home and abroad performance and price comparison, production unit cost is decided to be 2.8 ten thousand yuan/ton by company, it can thus be appreciated that, annual sales amount can reach 8,400,000 yuan, by Decree of the State Council of the People's Republic of China No. 538 Interim Regulation of the People's Republic of China on Value Added Tax regulation, this project value-added tax rate that dewaters be 13% value added tax is 109.2 ten thousand yuan, for enterprise and country bring very large income.
Embodiment
First the present invention improves matrix resin in amino silver powder finish paint, and after determining the matrix resin composition of paint, match corresponding aluminium powder, auxiliary agent and solvent, test paint film property, to reach corresponding performance requriements and construction requirement.Obtained by the present invention, wheel hub silver paint fullness ratio is high, and gloss is high, removes coating varnish coating from, saves the production cost of client, increases work efficiency.
The most important condition of paint for automobile wheel hub resin to have excellent shock-resistance, weathering resistance and clarity, and therefore, the fundamental property of resin is vital.Reach once shaped, the resin of high flexion rate must be selected.Flexion rate is high, reflectivity large, and the gloss of film coated surface just can improve.Meanwhile, resin must be also high solid, because adopt high solid resin can obtain thicker film, and film is thicker, and fullness ratio is better.In addition, at the initial stage that coating is in the past formed at film, the uneven surface of aluminium powder is easily produced owing to losing flowability, but when using high solid resin, the time of coating flow is elongated, does not almost have the uneven surface of aluminium powder, so just can obtain level and smooth, that gloss is high film.In addition, in order to avoid the acid-respons in aluminium powder and resin affects the metal effect painting depot and paint film, resinous acid value is more low better, meanwhile, can not use acid catalyst in formula.Therefore, in product of the present invention, selected acid value to arrange in pairs or groups lower than 5mgKOH/g high solid thermosetting acrylic resin and vibrin and used, to ensure the high solid content and low viscosity painted; Select high imino-methyl-etherified melamine resin and masked isocyanate resin as linking agent simultaneously, to guarantee that paint film can be cross-linked film forming without catalyzer in 140 DEG C of * 30min, and have good hardness and resistance to punching property.In addition, adapted part CAB551-0.01 resin, to help aluminium powder to be better arranged in paint film, presents outstanding metal effect.
Below in conjunction with specific embodiment, the invention will be further described:
Embodiment 1
One exempts from Lacquer finish automotive hub silver paint, and it is grouped into by the one-tenth of following weight: acrylic resin 43 parts, 15 parts, vibrin, cellulose acetate butyrate solution 12 parts, polyamide wax pulp 1 part, 14.3 parts, aminoresin, masked isocyanate resin 2 parts, flow agent 0.5 part, aluminum paste 6 parts, mixed solvent 6.2 parts.
Described mixed solvent is grouped into by the one-tenth of following weight: dimethylbenzene 30 parts, N-BUTYL ACETATE 25 parts, propyl carbinol 30 parts, pimelinketone 10 parts, DBE5 part.
Aforesaid propylene acid resin select solid content be 75% thermosetting acrylic resin.Vibrin select solid content be 80% saturated polyester resin.Cellulose acetate butyrate solution is dissolved in N-BUTYL ACETATE by CAB551-0.01 being mixed with, and mass percent concentration is 25%.Aminoresin select solid content be 80% high imino-methyl-etherified melamine resin.The particle diameter of aluminum paste is 25-45 μm.DBE is specially high boiling solvent mixed dibasic acid ester.
Preparation method comprises the following steps:
A1 takes acrylic resin, vibrin, cellulose acetate butyrate solution, masked isocyanate resin, polyamide wax pulp, aminoresin, flow agent, aluminum paste and mixed solvent by above-mentioned weight.
Acrylic resin, vibrin, cellulose acetate butyrate solution, masked isocyanate resin, polyamide wax pulp, aminoresin and flow agent input paint mixing tank high speed is dispersed to fineness and is less than 25 μm by a2.
Aluminum paste mixed solvent dilutes by a3, stirs, and then adds in step a2 paint mixing tank, and dispersion 20-30min, must exempt from Lacquer finish automotive hub silver paint.
Embodiment 2
One exempts from Lacquer finish automotive hub silver paint, and it is grouped into by the one-tenth of following weight: acrylic resin 43.4 parts, 16 parts, vibrin, cellulose acetate butyrate solution 10 parts, masked isocyanate resin 3 parts, polyamide wax pulp 2 parts, 14 parts, aminoresin, flow agent 0.6 part, aluminum paste 5 parts, mixed solvent 6 parts.
Described mixed solvent is grouped into by the one-tenth of following weight: dimethylbenzene 40 parts, N-BUTYL ACETATE 25 parts, propyl carbinol 20 parts, pimelinketone 9 parts, DBE6 part.
Aforesaid propylene acid resin select solid content be 75% thermosetting acrylic resin.Vibrin select solid content be 80% saturated polyester resin.Cellulose acetate butyrate solution is dissolved in N-BUTYL ACETATE by CAB551-0.01 being mixed with, and mass percent concentration is 25%.Aminoresin select solid content be 80% high imino-methyl-etherified melamine resin.The particle diameter of aluminum paste is 25-45 μm.DBE is specially high boiling solvent mixed dibasic acid ester.
Preparation method comprises the following steps:
A1 takes acrylic resin, vibrin, cellulose acetate butyrate solution, masked isocyanate resin, polyamide wax pulp, aminoresin, flow agent, aluminum paste and mixed solvent by above-mentioned weight.
Acrylic resin, vibrin, cellulose acetate butyrate solution, masked isocyanate resin, polyamide wax pulp, aminoresin and flow agent input paint mixing tank high speed is dispersed to fineness and is less than 25 μm by a2.
Aluminum paste mixed solvent dilutes by a3, stirs, and then adds in step a2 paint mixing tank, and dispersion 20-30min, must exempt from Lacquer finish automotive hub silver paint.
Embodiment 3
One exempts from Lacquer finish automotive hub silver paint, and it is grouped into by the one-tenth of following weight: acrylic resin 44 parts, 14 parts, vibrin, cellulose acetate butyrate solution 13 parts, masked isocyanate resin 2 parts, polyamide wax pulp 0.5 part, 14.1 parts, aminoresin, flow agent 0.4 part, aluminum paste 6 parts, mixed solvent 6 parts.
Described mixed solvent is grouped into by the one-tenth of following weight: dimethylbenzene 30 parts, N-BUTYL ACETATE 24 parts, propyl carbinol 30 parts, pimelinketone 12 parts, DBE4 part.
Aforesaid propylene acid resin select solid content be 75% thermosetting acrylic resin.Vibrin select solid content be 80% saturated polyester resin.Cellulose acetate butyrate solution is dissolved in N-BUTYL ACETATE by CAB551-0.01 being mixed with, and mass percent concentration is 25%.Aminoresin select solid content be 80% high imino-methyl-etherified melamine resin.The particle diameter of aluminum paste is 25-45 μm.DBE is specially high boiling solvent mixed dibasic acid ester.
Preparation method comprises the following steps:
A1 takes acrylic resin, vibrin, cellulose acetate butyrate solution, masked isocyanate resin, polyamide wax pulp, aminoresin, flow agent, aluminum paste and mixed solvent by above-mentioned weight.
Acrylic resin, vibrin, cellulose acetate butyrate solution, masked isocyanate resin, polyamide wax pulp, aminoresin and flow agent input paint mixing tank high speed is dispersed to fineness and is less than 25 μm by a2.
Aluminum paste mixed solvent dilutes by a3, stirs, and then adds in step a2 paint mixing tank, and dispersion 20-30min, must exempt from Lacquer finish automotive hub silver paint.
Lacquer finish automotive hub silver paint of exempting from obtained for embodiment 1 is carried out making sheet, and detect its performance, result is as following table 1.
Table 1
Project |
Unit |
Performance index |
Solid content |
% |
65±1 |
Outward appearance |
/ |
Silver color |
Viscosity |
(being coated with-4 glasss 25 DEG C)/s |
65~70 |
Time of drying |
140℃/min |
≤30 |
Gloss |
% |
≥95 |
Hardness |
H |
≥2 |
Sticking power |
Level |
1 |
Shock test |
cm.kg |
50 |
Water tolerance |
h |
≥48 |
Resistance to 5%HCl |
h |
≥24 |
Resistance to 5%NaOH |
h |
≥24 |
Salt fog resistance |
h |
≥240 |