CN1015898B

CN1015898B - Making-up process for low-temp. baking lacquer

Info

Publication number: CN1015898B
Application number: CN 90105761
Authority: CN
Inventors: 陈二孝
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-01-24
Filing date: 1990-01-24
Publication date: 1992-03-18
Also published as: CN1047100A

Abstract

The present invention relates to high-grade low temperature baking paint prepared by using home-made common amino baking paint sold in the market, polyurethane resin, alkyd resin and relevant auxiliary agents as materials and adopting a unique formula technology. The low temperature baking paint can be sprayed onto various base materials and can form a film by solidification at the temperature of 60 to 80DEG C. The paint film is tough and has the advantages of high glossiness, strong adhesive force, good three-prevention performance and good luster and color maintaining performance.

Description

Making-up process for low-temp. baking lacquer

The invention belongs to coating, be specifically related to a kind of blending process of low temperature baking enamel.

Widely used amine baking varnish in the industrial coating, general all must be about 120 ℃ through the oven dry of long period could film forming for shortening the storing time of amine baking varnish, succeed in developing " quick-dry type amine baking varnish " mid-term in succession in the eighties both at home and abroad.For example, it is " super quick-setting amino baking finish " patent application of CN87102843.3 that there is application number in China, and it is open on February 15th, 1989.The amine baking varnish that it is to use special Synolac and low tolerance aminoresin to prepare is shortened drying time, and painting quality improves, but storing temperature still needs 80～120 ℃ of ability film forming.Japanese kokai publication sho 61/285,267 discloses a kind of cold curing paint, and it reaches 98% at the coating gloss that 60 ℃ of bakings obtained in 30 minutes, and has good weathering resistance, water tolerance and oil-proofness; But this coating is that multi-component esters of acrylic acid is formulated, and starting material are rare expensive, and blending process is also quite complicated.

The objective of the invention is to utilize homemade commercially available common coating to be raw material, adopt easy Recipe, prepare and a kind ofly can be sprayed at various base materials, and can be under 60～80 ℃ low temperature film-forming, and paint film is tough and tensile, the glossiness height, strong adhesion, the mixed type high gear low temperature baking enamel that acid and alkali-resistance, salt tolerant halogen, humidity NBC protective performance and guarantor's light tint retention can be all good.

The present invention is achieved in that

100 parts of (weight, as follows) in the commercially available amine baking varnish (for example the beacon board amine baking varnish that lacquer factory produces is made in the Guangzhou), add and consist of dimethylbenzene 90%(weight, as follows), the amino lacquer diluent of butanols 10% to viscosity is (to be coated with-4 glasss in 20～30 seconds, as follows), middling speed (700～800 rev/mins, as follows) stirred 3 minutes; Slowly add 1～10 part of Three Gorges board alkyd varnish again, (1400～1500 rev/mins) stirred 5 minutes at a high speed; Speed adds 0.01～0.10 part of amine curing agent (for example quadrol) again, and middling speed stirred 5 minutes, and (below 100 rev/mins, as follows) stirred 5 minutes at last at a slow speed, and be stand-by as the A component with this.

In 50～200 parts of Three Gorges board polyurethane lacquers, add and consist of dimethylbenzene 60%, pimelinketone 15%, the thinner for polyurethane coating of N-BUTYL ACETATE 25% to viscosity is 22～25 seconds, the ketones solvent (for example acetone, methylethylketone) that slowly adds 5～30 parts of lower boilings, high volatility then, middling speed stirred 5 minutes, with this as the B component.

At last, the A component is slowly joined in the B component, middling speed stirred 5 minutes, stirred at a slow speed 5 minutes again, added 0.1～1.0 part of dehydrated alcohol before finishing stirring.

Like this, even if low temperature baking enamel process for preparation of the present invention is finished, shelve and to use in 20 minutes.

In addition, it should be noted that:, must in 24 hours, finish using in winter according to the low temperature baking enamel of the present invention's preparation; Must in 12 hours, finish using in summer.

Low temperature baking enamel according to the present invention's preparation can be sprayed on the various base materials securely; Can dry film forming in 0.5～2 hour 60～80 ℃ of temperature, paint film is tough and tensile, and glossiness reaches more than 97%; But 180 ° of flawlesses of application model centreless bending, destructive hammering do not fall lacquer; Can go up application at aluminium zinc and ABS plastic (acrylonitrile-butadiene-styrene terpolymer), acid and alkali-resistance, salt tolerant halogen, humidity NBC protective performance and guarantor's light tint retention can all be decorated enamelled coating above GB TQ2 first JB/Z111-74(limousine body).Because storing temperature is low, can be used for the baking of car renovation integral spray, and do not need device in the dismounting vehicle, the saving of labor economizes expense.

Embodiment 1

The low temperature baking enamel of Jialing motorcycle large lampshade (ABS plastic) application black.

Prescription: 100 parts of black amine baking varnishs, 10 parts of amino lacquer diluents, 5 parts of Three Gorges board alkyd varnishes, 0.1 part of quadrol, 60 parts of Three Gorges board polyurethane lacquers, 25 parts of thinner for polyurethane coatings, 20 parts in acetone, 0.3 part of industry anhydrous ethanol.

Above-mentioned recipe ingredient is mixed with A component and B component by preceding method, under agitation the A component is slowly joined in the B component then, add industry anhydrous ethanol at last, shelve again after 20 minutes and can use, to toast in the input far infrared drying room of large lampshade spraying back, baking is 0.5 hour under 70 ℃ of temperature, obtains the splendid black large lampshade of painting effect.

Embodiment 2

The red low temperature baking enamel of the super door lock application of aluminium zinc.

Prescription: 80 parts of red amine baking varnishs, 20 parts of black amine baking varnishs, 10 parts of amino lacquer diluents, 4 parts of Three Gorges board alkyd varnishes, 0.08 part of quadrol, 80 parts of Three Gorges board polyurethane lacquers, 25 parts of thinner for polyurethane coatings, 10 parts in acetone, 0.2 part of industry anhydrous ethanol.

Compound method is with aforementioned identical.To toast in the input far infrared drying room of the super door lock spraying of aluminium zinc back, 80 ℃ of bakings 0.5 hour, effect was splendid.

Claims

1, a kind of cryogenic baking finishing preparating process is characterized in that:

(1) it is with including 100 parts of (weight, as follows) the A component of amine baking varnish, 1～10 part of Three Gorges board alkyd varnish and 0.01～0.10 part of amine curing agent, slowly join and include 50～200 parts of Three Gorges board polyurethane lacquers and 5～30 parts of lower boilings, in the B component of the ketones solvent of high volatility, and 0.1～1.0 part of dehydrated alcohol of last adding is realized under evenly stirring;

(2) when preparation A component, amine baking varnish will be with consisting of dimethylbenzene 90% (weight, as follows), the amino lacquer diluent dilution of butanols 10%;

(3) when preparation B component, polyurethane lacquer will dilute with the thinner for polyurethane coating that consists of dimethylbenzene 60%, cyclohexanone 15%, N-BUTYL ACETATE 25%.

2, according to the described cryogenic baking finishing preparating process of claim 1, it is characterized in that: said A component is that amine baking varnish is diluted to viscosity with amino lacquer diluent is (to be coated with-4 glasss in 20～30 seconds, as follows), (700～800 rev/mins of middling speeds, as follows) stir and slowly to add Three Gorges board alkyd varnish in 3 minutes again, (1400～1500 rev/mins) stirred 5 minutes at a high speed; Extremely slowly, add amine curing agent again, middling speed stirred 5 minutes, and (below 100 rev/mins) stirring was prepared in 5 minutes at last at a slow speed.

3, according to the described cryogenic baking finishing preparating process of claim 1, it is characterized in that: said B component is that Three Gorges board polyurethane lacquer is diluted to viscosity with thinner for polyurethane coating is 22～25 seconds, slowly add lower boiling then, the ketones solvent of high volatility, the middling speed stirring was prepared in 5 minutes.