CN114769099A - Pretreatment process for color separation electroplating of clothing accessories - Google Patents
Pretreatment process for color separation electroplating of clothing accessories Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
- B05D7/16—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies using synthetic lacquers or varnishes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0406—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
- B05D3/0413—Heating with air
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2502/00—Acrylic polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2503/00—Polyurethanes
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
The invention relates to a pretreatment process for color separation electroplating of clothing accessories, which comprises the following steps of finishing the surface of a workpiece subjected to ground color electroplating, coating acrylic polyurethane varnish on an electroless plating area of the workpiece, and drying after finishing painting to obtain a prefabricated part; the acrylic polyurethane varnish comprises a component A and a component B accounting for 28-32% of the component A; the component A comprises the following raw materials, by weight, 25-35 parts of hydroxyl acrylic resin, 10-20 parts of an auxiliary agent and 100 parts of a mixed solvent; the component B comprises the following raw materials in parts by weight, 55-65 parts of isocyanate curing agent and 100 parts of organic solvent. The invention adopts the mode of acrylic polyurethane varnish on the non-electroplating area of the workpiece to replace two steps of ink coating and ink removing, is beneficial to shortening the working procedure, and achieves the purposes of avoiding electroplating surface pollution and improving electroplating quality.
Description
Technical Field
The invention relates to the technical field of a two-color electroplating process, in particular to a pretreatment process for color separation electroplating of clothing accessories.
Background
The designs and colors of badges, buttons and belt fasteners are continuously updated along with the development of the society, and people cannot meet the requirements of the original single plating color, double-color and multi-color electroplating.
The Chinese patent with the publication number of CN104233417A discloses a process for double-color plating of a zinc alloy button by rolling and hanging, which comprises the following steps: bottom color electroplating, printing ink applying, secondary electroplating, printing ink removing, tertiary electroplating, color fishing and protective film applying; the bottom color electroplating is bottom color acid copper plating and is carried out according to a conventional red copper rack plating process, namely: blank, wax removal, oil removal, activation, cyanide copper plating, pyrophosphate copper plating, bright acid copper plating, passivation and drying; the convex part of the workpiece with the ink-coated button is coated by adopting a screen printing and transfer printing method or manually by using an ink pen, the uniformly coated convex part is put into an oven, baked for 1h at the temperature of 80 ℃, and naturally cooled for later use; the secondary electroplating is secondary electroplating bright nickel, and the specific process flow of the secondary electroplating is as follows: hanging, deoiling, activating, copper coke, acid copper and bright nickel; the ink removing step is that the workpiece is placed into a diluent for ultrasonic oscillation so as to completely remove the ink; and the third electroplating is activated after ink is removed, and then gun black is plated.
The above prior art solutions have the following drawbacks: the technology adopts a secondary electroplating method and a third electroplating method to carry out double-color electroplating, and carries out operations of ink feeding and ink removing respectively before each coating, and the inks are used for protecting areas on the button which do not need electroplating, and play roles of electroplating resistance and local electroplating convenience; however, the ink treatment process before and after the two-color plating is complicated, and the ink film formation is slow and the ink volatilization is fast, so that the conditions of ink pollution and incomplete electroplating on the electroplating surface are easy to occur. Therefore, the ink applying step before the secondary electroplating needs to be optimized, the subsequent ink removing step is saved, and the situations of ink pollution and incomplete electroplating on the electroplating surface can be avoided.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a pretreatment process for color separation electroplating of clothing accessories, which adopts acrylic polyurethane varnish to replace the original pretreatment process for printing ink, thereby achieving the purposes of avoiding pollution of an electroplating surface and improving the electroplating quality.
The above object of the present invention is achieved by the following technical solutions:
a pretreatment process for color separation electroplating of clothing accessories comprises the following steps of carrying out surface finishing on a workpiece subjected to ground color electroplating, then coating acrylic polyurethane varnish on an electroless plating area of the workpiece, and drying after finishing coating to obtain a prefabricated part; the acrylic polyurethane varnish comprises a component A and a component B accounting for 28-32% of the component A; the component A comprises the following raw materials, by weight, 25-35 parts of hydroxyl acrylic resin, 10-20 parts of an auxiliary agent and 100 parts of a mixed solvent; the component B comprises the following raw materials in parts by weight, 55-65 parts of isocyanate curing agent and 100 parts of organic solvent.
By adopting the technical scheme, the mode of coating the acrylic polyurethane varnish on the non-electroplating area of the workpiece is adopted to replace two steps of ink coating and ink removing, the acrylic polyurethane varnish has the advantages of low-temperature film forming, wear resistance and weather resistance, a transparent film can be quickly formed on the non-electroplating area of the workpiece, after the transparent film is dried and reinforced, the functions of electroplating resistance and local electroplating convenience can be achieved, the defects caused by the original ink coating mode are avoided, the process is favorably shortened, and the purposes of avoiding electroplating surface pollution and improving electroplating quality are achieved.
Further, the process of applying the acrylic urethane varnish employs one of a printing process, a transfer printing process and a coating process.
The auxiliary agent further comprises, by weight, 3-5 parts of hydroxyethyl cellulose, 2-5 parts of an acrylate leveling agent, 3-6 parts of a polysiloxane defoaming agent, 1-2 parts of ethylhexyl salicylate and 1-2 parts of a hindered amine light stabilizer.
Further, the mixed solvent is one of denatured ethanol/water, ethyl acetate/water, and propylene glycol methyl ether acetate/water.
Further, the organic solvent is one of denatured ethanol, ethyl acetate, ethylene glycol butyl ether acetate and propylene glycol methyl ether acetate.
Further, the acrylic polyurethane varnish also comprises a plant preparation which accounts for 1-2% of the amount of the component A, wherein the plant preparation comprises linalool, menthol, a lime peel extract, a peony root extract and an ailanthus fruit extract in equal mass ratio.
Further, the acrylic polyurethane varnish also comprises an acrylic acid (ester)/octyl acrylamide copolymer which accounts for 4-6% of the amount of the component A.
Furthermore, the acrylic polyurethane varnish also comprises glycolic acid accounting for 1-2% of the component A and potash water glass accounting for 2-3% of the component A.
Further, the surface finishing is one or more of polishing, buffing, tumbling, degreasing and cleaning.
Furthermore, in the drying process, the drying temperature is 40-60 ℃, the drying time is 4-6 min, and the drying is carried out at normal temperature.
In summary, the beneficial technical effects of the invention are as follows: the mode of acrylic polyurethane varnish on the non-electroplating area of the workpiece is adopted to replace two steps of ink coating and ink removing, the acrylic polyurethane varnish has the advantages of low-temperature film forming, wear resistance and weather resistance, a transparent film can be quickly formed on the non-electroplating area of the workpiece, after the transparent film is dried and reinforced, the effects of electroplating resistance and local electroplating convenience can be achieved, the defects caused by the original ink coating mode are avoided, the process shortening is facilitated, and the purposes of avoiding electroplating surface pollution and improving electroplating quality are achieved.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the functions of the invention clearer and easier to understand, the invention is further described in the following with the specific embodiments.
Example 1: the invention discloses a pretreatment process for color separation electroplating of clothing accessories, which comprises the following steps,
s1 acrylic polyurethane varnish is prepared in advance, and the concrete implementation mode is as follows,
(1) preparing a component A, under the protection of nitrogen, firstly adding 20 parts of denatured ethanol/water into a mixing container, then adding 30 parts of hydroxy acrylic resin, 3 parts of hydroxyethyl cellulose, 2 parts of acrylate flatting agent, 3 parts of polysiloxane defoamer, 1 part of ethylhexyl salicylate and 1 part of hindered amine light stabilizer, then adding 100 parts of denatured ethanol/water, and stirring and uniformly mixing to obtain the component A;
(2) preparing a component B, adding 60 parts of isocyanate curing agent into a mixing container, and then adding 100 parts of denatured ethanol to obtain the component B;
(3) preparing plant preparation, mixing linalool, menthol, fructus Citri Junoris pericarp extract, radix moutan extract and fructus Ailanthi extract at equal mass ratio, wherein the mass error of each component is controlled at + -0.1%
(4) Mixing the component A, the component B, the plant preparation, the acrylic acid (ester)/octyl acrylamide copolymer, the glycolic acid and the potassium water glass according to the ratio of 100: 32: 1: 4: 2: 2, putting the mixture into a stirring container, and uniformly stirring to obtain acrylic polyurethane varnish;
s2, polishing, degreasing and cleaning the workpiece subjected to ground color electroplating, coating acrylic polyurethane varnish on an electroless plating area of the workpiece, drying at the drying temperature of 50 ℃ for 5min after finishing painting, and spreading and drying at normal temperature after drying to obtain the prefabricated part.
The performance test of the obtained prefabricated member shows that the acrylic polyurethane varnish film layer coated on the surface of the prefabricated member has excellent plating resistance (copper plating 18ASF is 50min, copper plating 18ASF is 100min, copper plating 21ASF is 50min, tin plating 11ASF is 20min and tin plating 14ASF is 10 min), and has good weather resistance, light resistance, heat resistance and adhesion.
Example 2: the invention discloses a pretreatment process for color separation electroplating of clothing accessories, which comprises the following steps,
s1 acrylic urethane varnish was prepared in advance, and the concrete implementation thereof was as follows,
(1) preparing a component A, under the protection of nitrogen, firstly adding 20 parts of ethyl acetate/water into a mixing container, then adding 30 parts of hydroxy acrylic resin, 5 parts of hydroxyethyl cellulose, 5 parts of acrylate flatting agent, 6 parts of polysiloxane antifoaming agent, 2 parts of ethylhexyl salicylate and 2 parts of hindered amine light stabilizer, then adding 100 parts of ethyl acetate/water, and stirring and uniformly mixing to obtain the component A;
(2) preparing a component B, adding 60 parts of isocyanate curing agent into a mixing container, and then adding 100 parts of ethyl acetate to obtain the component B;
(3) preparing plant preparation, mixing linalool, menthol, fructus Citri Junoris pericarp extract, radix moutan extract and fructus Ailanthi extract at equal mass ratio, wherein the mass error of each component is controlled at + -0.1%
(4) Mixing component A, component B, the plant preparation, the acrylic acid (ester)/octyl acrylamide copolymer, the glycolic acid and the potassium water glass according to the proportion of 100: 31: 2: 5: 1: 2, putting the mixture into a stirring container, and uniformly stirring to obtain acrylic polyurethane varnish;
s2, polishing, degreasing and cleaning the workpiece subjected to ground color electroplating, coating acrylic polyurethane varnish on an electroless plating area of the workpiece, drying at the drying temperature of 50 ℃ for 5min after finishing painting, and spreading and drying at normal temperature after drying to obtain the prefabricated member.
Example 3: the invention discloses a pretreatment process for color separation electroplating of clothing accessories, which comprises the following steps,
s1 acrylic urethane varnish was prepared in advance, and the concrete implementation thereof was as follows,
(1) preparing a component A, under the protection of nitrogen, firstly adding 20 parts of propylene glycol monomethyl ether acetate/water into a mixing container, then adding 25 parts of hydroxy acrylic resin, 4 parts of hydroxyethyl cellulose, 2 parts of acrylate flatting agent, 5 parts of polysiloxane defoamer, 1 part of ethylhexyl salicylate and 2 parts of hindered amine light stabilizer, then adding 100 parts of propylene glycol monomethyl ether acetate/water, and uniformly stirring to obtain the component A;
(2) preparing a component B, adding 55 parts of isocyanate curing agent into a mixing container, and adding 100 parts of propylene glycol monomethyl ether acetate to obtain the component B;
(3) preparing plant preparation, mixing linalool, menthol, fructus Citri Junoris pericarp extract, radix moutan Japonici extract and fructus Ailanthi extract at equal mass ratio with mass error controlled at + -0.1%
(4) Mixing component A, component B, the plant preparation, the acrylic acid (ester)/octyl acrylamide copolymer, the glycolic acid and the potassium water glass according to the proportion of 100: 30: 2: 6: 1: 2, putting the mixture into a stirring container, and uniformly stirring to obtain acrylic polyurethane varnish;
s2, polishing, deoiling and cleaning the workpiece subjected to ground color electroplating, coating acrylic polyurethane varnish on an electroless plating area of the workpiece, drying at 60 ℃ for 6min after finishing painting, and spreading and drying at normal temperature after drying to obtain the prefabricated part.
Example 4: the invention discloses a pretreatment process for color separation electroplating of clothing accessories, which comprises the following steps,
s1 acrylic urethane varnish was prepared in advance, and the concrete implementation thereof was as follows,
(1) preparing a component A, under the protection of nitrogen, firstly adding 20 parts of denatured ethanol/water into a mixing container, then adding 35 parts of hydroxyl acrylic resin, 5 parts of hydroxyethyl cellulose, 5 parts of acrylate flatting agent, 6 parts of polysiloxane defoamer, 2 parts of ethylhexyl salicylate and 1 part of hindered amine light stabilizer, then adding 100 parts of denatured ethanol/water, and stirring and uniformly mixing to obtain the component A;
(2) preparing a component B, adding 65 parts of isocyanate curing agent into a mixing container, and then adding 100 parts of ethylene glycol butyl ether acetate to obtain the component B;
(3) preparing plant preparation, mixing linalool, menthol, fructus Citri Junoris pericarp extract, radix moutan Japonici extract and fructus Ailanthi extract at equal mass ratio with mass error controlled at + -0.1%
(4) Mixing component A, component B, the plant preparation, the acrylic acid (ester)/octyl acrylamide copolymer, the glycolic acid and the potassium water glass according to the proportion of 100: 29: 1: 6: 2: 2, putting the mixture into a stirring container, and uniformly stirring to obtain acrylic polyurethane varnish;
s2, polishing, deoiling and cleaning the workpiece subjected to ground color electroplating, coating acrylic polyurethane varnish on an electroless plating area of the workpiece, drying at 40 ℃ for 4min after finishing painting, and spreading and drying at normal temperature after drying to obtain the prefabricated part.
Example 5: the invention discloses a pretreatment process for color separation electroplating of clothing accessories, which comprises the following steps,
s1 acrylic polyurethane varnish is prepared in advance, and the concrete implementation mode is as follows,
(1) preparing a component A, under the protection of nitrogen, firstly adding 20 parts of ethyl acetate/water into a mixing container, then adding 28 parts of hydroxy acrylic resin, 3 parts of hydroxyethyl cellulose, 3 parts of acrylate flatting agent, 4 parts of polysiloxane antifoaming agent, 2 parts of ethylhexyl salicylate and 1 part of hindered amine light stabilizer, then adding 100 parts of ethyl acetate/water, and stirring and uniformly mixing to obtain the component A;
(2) preparing a component B, adding 58 parts of isocyanate curing agent into a mixing container, and then adding 100 parts of ethyl acetate to obtain the component B;
(3) preparing plant preparation, mixing linalool, menthol, fructus Citri Junoris pericarp extract, radix moutan extract and fructus Ailanthi extract at equal mass ratio, wherein the mass error of each component is controlled at + -0.1%
(4) Mixing component A, component B, the plant preparation, the acrylic acid (ester)/octyl acrylamide copolymer, the glycolic acid and the potassium water glass according to the proportion of 100: 28: 1: 5: 2: 3, putting the mixture into a stirring container, and uniformly stirring to obtain acrylic polyurethane varnish;
s2, polishing, degreasing and cleaning the workpiece subjected to ground color electroplating, coating acrylic polyurethane varnish on an electroless plating area of the workpiece, drying at the drying temperature of 45 ℃ for 4min after finishing painting, and spreading and drying at normal temperature after drying to obtain the prefabricated member.
Example 6: the invention discloses a pretreatment process for color separation electroplating of clothing accessories, which comprises the following steps,
s1 acrylic urethane varnish was prepared in advance, and the concrete implementation thereof was as follows,
(1) preparing a component A, under the protection of nitrogen, firstly adding 20 parts of propylene glycol monomethyl ether acetate/water into a mixing container, then adding 32 parts of hydroxyl acrylic resin, 5 parts of hydroxyethyl cellulose, 5 parts of acrylate flatting agent, 3 parts of polysiloxane defoamer, 1 part of ethylhexyl salicylate and 2 parts of hindered amine light stabilizer, then adding 100 parts of propylene glycol monomethyl ether acetate/water, and stirring and mixing uniformly to obtain the component A;
(2) preparing a component B, adding 59 parts of isocyanate curing agent into a mixing container, and adding 100 parts of propylene glycol monomethyl ether acetate to obtain the component B;
(3) preparing plant preparation, mixing linalool, menthol, fructus Citri Junoris pericarp extract, radix moutan Japonici extract and fructus Ailanthi extract at equal mass ratio with mass error controlled at + -0.1%
(4) Mixing component A, component B, the plant preparation, the acrylic acid (ester)/octyl acrylamide copolymer, the glycolic acid and the potassium water glass according to the proportion of 100: 28: 2: 4: 1: 3, putting the mixture into a stirring container, and uniformly stirring to obtain acrylic polyurethane varnish;
s2, polishing, degreasing and cleaning the workpiece subjected to ground color electroplating, coating acrylic polyurethane varnish on an electroless plating area of the workpiece, drying at 55 ℃ for 4min after finishing painting, and spreading and drying at normal temperature after drying to obtain the prefabricated member.
Example 7: the invention discloses a pretreatment process for color separation electroplating of clothing accessories, which comprises the following steps,
s1 acrylic polyurethane varnish is prepared in advance, and the concrete implementation mode is as follows,
(1) preparing a component A, under the protection of nitrogen, firstly adding 20 parts of denatured ethanol/water into a mixing container, then adding 31 parts of hydroxyl acrylic resin, 4 parts of hydroxyethyl cellulose, 4 parts of acrylate flatting agent, 6 parts of polysiloxane defoamer, 1 part of ethylhexyl salicylate and 1 part of hindered amine light stabilizer, then adding 100 parts of denatured ethanol/water, and stirring and uniformly mixing to obtain the component A;
(2) preparing a component B, adding 62 parts of isocyanate curing agent into a mixing container, and then adding 100 parts of denatured ethanol to obtain the component B;
(3) preparing plant preparation, mixing linalool, menthol, fructus Citri Junoris pericarp extract, radix moutan extract and fructus Ailanthi extract at equal mass ratio, wherein the mass error of each component is controlled at + -0.1%
(4) Mixing component A, component B, the plant preparation, the acrylic acid (ester)/octyl acrylamide copolymer, the glycolic acid and the potassium water glass according to the proportion of 100: 29: 1: 5: 1: 3, putting the mixture into a stirring container, and uniformly stirring to obtain acrylic polyurethane varnish;
s2, polishing, degreasing and cleaning the workpiece subjected to ground color electroplating, coating acrylic polyurethane varnish on an electroless plating area of the workpiece, drying at 48 ℃ for 5min after finishing painting, and spreading and drying at normal temperature after drying to obtain the prefabricated part.
Example 8: the invention discloses a pretreatment process for color separation electroplating of clothing accessories, which comprises the following steps,
s1 acrylic polyurethane varnish is prepared in advance, and the concrete implementation mode is as follows,
(1) preparing a component A, under the protection of nitrogen, firstly adding 20 parts of ethyl acetate/water into a mixing container, then adding 33 parts of hydroxy acrylic resin, 3 parts of hydroxyethyl cellulose, 2 parts of acrylate flatting agent, 4 parts of polysiloxane antifoaming agent, 2 parts of ethylhexyl salicylate and 2 parts of hindered amine light stabilizer, then adding 100 parts of ethyl acetate/water, and stirring and uniformly mixing to obtain the component A;
(2) preparing a component B, adding 64 parts of isocyanate curing agent into a mixing container, and then adding 100 parts of ethyl acetate to obtain the component B;
(3) preparing plant preparation, mixing linalool, menthol, fructus Citri Junoris pericarp extract, radix moutan extract and fructus Ailanthi extract at equal mass ratio, wherein the mass error of each component is controlled at + -0.1%
(4) Mixing the component A, the component B, the plant preparation, the acrylic acid (ester)/octyl acrylamide copolymer, the glycolic acid and the potassium water glass according to the ratio of 100: 30: 2: 6: 2: 3, putting the mixture into a stirring container, and uniformly stirring to obtain acrylic polyurethane varnish;
s2, polishing, deoiling and cleaning the workpiece subjected to ground color electroplating, coating acrylic polyurethane varnish on an electroless plating area of the workpiece, drying at the drying temperature of 53 ℃ for 5min after finishing painting, and spreading and drying at normal temperature after drying to obtain the prefabricated part.
Example 9: the invention discloses a pretreatment process for color separation electroplating of clothing accessories, which comprises the following steps,
s1 acrylic urethane varnish was prepared in advance, and the concrete implementation thereof was as follows,
(1) preparing a component A, under the protection of nitrogen, firstly adding 20 parts of propylene glycol monomethyl ether acetate/water into a mixing container, then adding 26 parts of hydroxy acrylic resin, 5 parts of hydroxyethyl cellulose, 5 parts of acrylate flatting agent, 3 parts of polysiloxane defoamer, 1 part of ethylhexyl salicylate and 2 parts of hindered amine light stabilizer, then adding 100 parts of propylene glycol monomethyl ether acetate/water, and uniformly stirring to obtain the component A;
(2) preparing a component B, adding 57 parts of isocyanate curing agent into a mixing container, and adding 100 parts of propylene glycol monomethyl ether acetate to obtain the component B;
(3) preparing plant preparation, mixing linalool, menthol, fructus Citri Junoris pericarp extract, radix moutan extract and fructus Ailanthi extract at equal mass ratio, wherein the mass error of each component is controlled at + -0.1%
(4) Mixing component A, component B, the plant preparation, the acrylic acid (ester)/octyl acrylamide copolymer, the glycolic acid and the potassium water glass according to the proportion of 100: 31: 2: 4: 2: 2, putting the mixture into a stirring container, and uniformly stirring to obtain acrylic polyurethane varnish;
s2, polishing, degreasing and cleaning the workpiece subjected to ground color electroplating, coating acrylic polyurethane varnish on an electroless plating area of the workpiece, drying at 59 ℃ for 6min after finishing painting, and spreading and drying at normal temperature after drying to obtain the prefabricated member.
Example 10: the invention discloses a pretreatment process for color separation electroplating of clothing accessories, which comprises the following steps,
s1 acrylic polyurethane varnish is prepared in advance, and the concrete implementation mode is as follows,
(1) preparing a component A, under the protection of nitrogen, firstly adding 20 parts of ethyl acetate/water into a mixing container, then adding 27 parts of hydroxyl acrylic resin, 4 parts of hydroxyethyl cellulose, 4 parts of acrylate leveling agent, 5 parts of polysiloxane defoamer, 2 parts of ethylhexyl salicylate and 1 part of hindered amine light stabilizer, then adding 100 parts of ethyl acetate/water, and stirring and uniformly mixing to obtain the component A;
(2) preparing a component B, adding 63 parts of isocyanate curing agent into a mixing container, and then adding 100 parts of ethyl acetate to obtain the component B;
(3) preparing plant preparation, mixing linalool, menthol, fructus Citri Junoris pericarp extract, radix moutan extract and fructus Ailanthi extract at equal mass ratio, wherein the mass error of each component is controlled at + -0.1%
(4) Mixing component A, component B, the plant preparation, the acrylic acid (ester)/octyl acrylamide copolymer, the glycolic acid and the potassium water glass according to the proportion of 100: 32: 1: 6: 1: 3, putting the mixture into a stirring container, and uniformly stirring to obtain acrylic polyurethane varnish;
s2, polishing, deoiling and cleaning the workpiece subjected to ground color electroplating, coating acrylic polyurethane varnish on an electroless plating area of the workpiece, drying at 42 ℃ for 6min after finishing painting, and spreading and drying at normal temperature after drying to obtain the prefabricated part.
Comparative example 1: the difference from example 1 is that in step (4) of S1, no auxiliary agent is added.
The performance of the obtained preform was examined, and the acrylic urethane varnish film layer coated on the surface of the preform was poor in plating resistance (copper plating 18ASF 50min, copper plating 18ASF 100min, copper plating 21ASF 50min, tin plating 11ASF 20min, tin plating 14ASF 10 min), weather resistance, light resistance, heat resistance, and adhesion.
Comparative example 2: the difference from example 1 is that in step (4) of S1, no plant preparation is added.
The performance of the obtained prefabricated member is tested, and the acrylic polyurethane varnish film layer coated on the surface of the prefabricated member has poor electroplating resistance (copper plating 18ASF 50min, copper plating 18ASF 100min, copper plating 21ASF 50min, tin plating 11ASF 20min and tin plating 14ASF 10 min), and has good weather resistance, light resistance, heat resistance and adhesion.
Comparative example 3: the difference from example 1 is that in step (4) of S1, no acrylic acid (ester)/octylacrylamide copolymer was added.
The performance of the obtained prefabricated member is tested, and the acrylic polyurethane varnish film layer coated on the surface of the prefabricated member has better plating resistance (copper plating 18ASF 50min, copper plating 18ASF 100min, copper plating 21ASF 50min, tin plating 11ASF 20min and tin plating 14ASF 10 min), good weather resistance, light resistance and heat resistance and poor adhesion.
Comparative example 4: the difference from example 1 is that glycolic acid was not added in step (4) of S1.
The performance of the obtained prefabricated member is tested, and the acrylic polyurethane varnish film layer coated on the surface of the prefabricated member has poor electroplating resistance (copper plating 18ASF 50min, copper plating 18ASF 100min, copper plating 21ASF 50min, tin plating 11ASF 20min and tin plating 14ASF 10 min), good weather resistance, light resistance and heat resistance and poor adhesion.
Comparative example 5: the difference from example 1 is that potassium water glass is not added in step (4) of S1.
The performance test of the obtained prefabricated member shows that the acrylic polyurethane varnish film layer coated on the surface of the prefabricated member has poor electroplating resistance (copper plating 18ASF is 50min, copper plating 18ASF is 100min, copper plating 21ASF is 50min, tin plating 11ASF is 20min and tin plating 14ASF is 10 min), and has good weather resistance, light resistance, heat resistance and poor adhesion.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A pretreatment process for color separation electroplating of clothing accessories is characterized by comprising the following steps: the method comprises the following steps of performing surface finishing on a workpiece subjected to ground color electroplating, coating acrylic polyurethane varnish on an electroless plating area of the workpiece, and drying after finishing coating to obtain a prefabricated part; the acrylic polyurethane varnish comprises a component A and a component B accounting for 28-32% of the component A; the component A comprises the following raw materials, by weight, 25-35 parts of hydroxyl acrylic resin, 10-20 parts of an auxiliary agent and 100 parts of a mixed solvent; the component B comprises the following raw materials in parts by weight, 55-65 parts of isocyanate curing agent and 100 parts of organic solvent.
2. The color separation electroplating pretreatment process for the clothing accessories, according to claim 1, is characterized in that: the acrylic polyurethane varnish applying process adopts one treatment method of printing, transfer printing and coating acrylic polyurethane varnish.
3. The pretreatment process for color separation and electroplating of clothing accessories according to claim 1, wherein the pretreatment process comprises the following steps: the auxiliary agent comprises, by weight, 3-5 parts of hydroxyethyl cellulose, 2-5 parts of acrylate flatting agent, 3-6 parts of polysiloxane defoamer, 1-2 parts of ethylhexyl salicylate and 1-2 parts of hindered amine light stabilizer.
4. The color separation electroplating pretreatment process for the clothing accessories, according to claim 1, is characterized in that: the mixed solvent is one of denatured ethanol/water, ethyl acetate/water and propylene glycol monomethyl ether acetate/water.
5. The pretreatment process for color separation and electroplating of clothing accessories according to claim 1, wherein the pretreatment process comprises the following steps: the organic solvent is one of denatured ethanol, ethyl acetate, ethylene glycol butyl ether acetate and propylene glycol methyl ether acetate.
6. The pretreatment process for color separation and electroplating of clothing accessories according to claim 1, wherein the pretreatment process comprises the following steps: the acrylic polyurethane varnish also comprises a botanical preparation which accounts for 1-2% of the amount of the component A, wherein the botanical preparation comprises linalool, menthol, a sour orange peel extract, a peony root extract and an ailanthus fruit extract in equal mass ratio.
7. The color separation electroplating pretreatment process for the clothing accessories, according to claim 1, is characterized in that: the acrylic polyurethane varnish also comprises acrylic acid (ester)/octyl acrylamide copolymer which accounts for 4-6% of the amount of the component A.
8. The pretreatment process for color separation and electroplating of clothing accessories according to claim 1, wherein the pretreatment process comprises the following steps: the acrylic polyurethane varnish also comprises glycolic acid accounting for 1-2% of the component A and potash water glass accounting for 2-3% of the component A.
9. The color separation and electroplating pretreatment process for the clothing accessories, according to any one of claims 1 to 8, is characterized in that: the surface finishing is one or a combination treatment method of a plurality of polishing, burnishing, oil removing and cleaning.
10. The color separation and electroplating pretreatment process for the clothing accessories, according to any one of claims 1 to 8, is characterized in that: and in the drying process, the drying temperature is 40-60 ℃, the drying time is 4-6 min, and the drying is carried out at normal temperature and spreading and drying in the air.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105440745A (en) * | 2015-11-29 | 2016-03-30 | 洛阳绿仁环保设备有限公司 | Organic-inorganic hybrid photocatalyst coating and preparation method thereof |
| CN113025140A (en) * | 2021-03-09 | 2021-06-25 | 长沙蓝思新材料有限公司 | Vacuum electroplating thermosetting dissolving type protective oil and vacuum electroplating process |
| CN113583564A (en) * | 2021-08-09 | 2021-11-02 | 江苏宏泰高分子材料有限公司 | Primer coating suitable for nylon and glass fiber plastic material and preparation method and application thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105440745A (en) * | 2015-11-29 | 2016-03-30 | 洛阳绿仁环保设备有限公司 | Organic-inorganic hybrid photocatalyst coating and preparation method thereof |
| CN113025140A (en) * | 2021-03-09 | 2021-06-25 | 长沙蓝思新材料有限公司 | Vacuum electroplating thermosetting dissolving type protective oil and vacuum electroplating process |
| CN113583564A (en) * | 2021-08-09 | 2021-11-02 | 江苏宏泰高分子材料有限公司 | Primer coating suitable for nylon and glass fiber plastic material and preparation method and application thereof |
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