WO2008003205A1

WO2008003205A1 - Coating composition for artificial pearls

Info

Publication number: WO2008003205A1
Application number: PCT/CN2007/000959
Authority: WO
Inventors: Yongnan Li; Xiangwen Li
Original assignee: Qingdao Minoa Art Crafts Co., Ltd; Qingdao Luxe Pearls Co., Ltd
Priority date: 2006-06-26
Filing date: 2007-03-26
Publication date: 2008-01-10
Also published as: CN1896161A; CN100535065C

Abstract

A coating composition for artificial pearls and the preparing method thereof are disclosed. The coating composition for artificial pearls comprises (by weight)1.5-6% of celluloid, 0.1-0.6% of camphor, 86-95% of mixture solvent which consists of acetone or/and ethyl acetate and butyl acetate or/and amyl acetate, and 1-8% of pigment. The coating composition for artificial pearls has the advantages of harmless to human body, environment-friendly, excellent in color and gloss, shortened dying and curing time, low cost and high productivity which is suitable for large scale manufacture.

Description

Artificial pearl paint and production method thereof

Technical field

The invention belongs to the technical field of coating of a polymer material forming product, and particularly relates to a surface coating for artificial pearl.

Background technique

With the development of modern technology and the improvement of people's living standards, the decorations worn by people are constantly changing. Among them, the artificial pearls that can express the quality of natural pearls can be mass-produced in the fields of jewelry, rings, collars, toys, etc. More and more extensive. In the prior art, the artificial pearl is generally prepared by dissolving the nitrocellulose in various solvents, and then adding a pigment to the solution to coat the resin beads, and most of the pigments in the above ingredients are hydroxides containing lead components. A compound of a salt and a basic lead carbonate, which can give a pearl a good texture and luster, but it is an intractable problem to cause harm to the human body after wearing it and pollute the environment.

Chinese patent ZL200410024173.3, the invention titled "artificial pearl coating and its production method" discloses a coating and production method which does not contain lead component, but because of its large amount of celluloid and unreasonable formula, the viscosity of the coating is relatively Large, pearl dyeing time is long, the surface coating is thick, the drying time is long, the cost is high, the work efficiency is low, and the product yield is low. Summary of the invention

SUMMARY OF THE INVENTION The object of the present invention is to provide an artificial pearl paint which has no pollution to the environment, does not cause harm after wearing the human body, and has better effects in color and gloss, low cost and high work efficiency, and a production process thereof.

The coating of the invention is achieved by the following technical solutions: The composition according to the weight ratio includes: 1.5-6% of cellophane, 86-95% of esterification solvent, 1-8% of pigment, wherein the esterification solvent is made of acetone or ethyl acetate or two The mixture is composed of a mixture of butyl acetate or / and amyl acetate, or consists of ethyl acetate and butyl acetate, or butyl acetate and amyl acetate.

In the technical solution of the present invention, camphor may be added in a weight ratio of 0.1-0.6% as a plasticizer.

Specific examples include that the celluloid content is 1.5-6% by weight, the esterification solvent comprises a mixture of acetone and ethyl acetate, and a mixture of butyl acetate and amyl acetate, wherein the weight ratio of the mixture of acetone and ethyl acetate is 30-60%, the mixture of butyl acetate and amyl acetate has a weight ratio of 30-60%, the content of camphor is 0.1-0.6%, and the pigment is bismuth oxychloride. The weight ratio is 3-8. %, this is called the first coating; the cellulite content is 1.5-6% by weight, the esterification solvent comprises a mixture of acetone and ethyl acetate and a mixture of butyl acetate and amyl acetate, wherein acetone and acetic acid The mixture ratio of the ester is 15-45% by weight, the weight ratio of butyl acetate to amyl acetate is 35-80%, the weight ratio of camphor is 0.1-0.6%, and the pigment is bismuth oxychloride. The specific content is 1-8 ° /. This is called the second coating; the weight ratio of the mixture of acetone and ethyl acetate in the first coating and the second coating is: 0-30% for acetone and 70-100 for ethyl acetate. %; The weight ratio of the mixture of butyl acetate and amyl acetate is: The butyl acetate is 70-100%, and the amyl acetate is 0-30%. .

According to the weight ratio of celluloid, the content of ethyl ester is 1.5-6%, and the esterification solvent includes ethyl acetate and butyl acetate. The weight ratio of ethyl acetate is 16-38%, and the weight ratio of butyl acetate is 40-80%. The weight ratio of camphor is 0.1-0.6%, and the pigment is bismuth oxychloride. The weight ratio is 1-8%, which is called the third coating.

In the technical solution of the present invention, the amount of butyl acetate added to each layer of coating should be increased compared with the amount of the previous layer, which is advantageous for improving the smoothness and gloss of the surface of the pearl.

In the technical solution of the present invention, since the raw material price of the antimony trichloride is high, in order to reduce the cost, a part of the antimony trichloride can be replaced by the titanium dioxide, and the weight ratio of the two to the pigment is 60-90% of the titanium dioxide, and the antimony trichloride 10 -40%.

The method of producing a coating of the present invention is such that it comprises the following steps:

a mixture of crucible in a weight ratio of 1.5-6% and an esterification solvent having a weight ratio of 86-95%; wherein the esterification solvent consists of a mixture of acetone and ethyl acetate and a mixture of butyl acetate and amyl acetate. Or consisting of ethyl acetate and butyl acetate.

b. Stir to a sticky state and add a pigment with a weight ratio of 1-8%. '

When a cellulite having a weight ratio of 1.5 to 6% and an esterification solvent having a weight ratio of 86 to 95% are mixed and stirred, a weight ratio of 0.1 to 0.6% of camphor may be added as a synergist.

In the method for producing a paint of the present invention, it is possible to improve the work efficiency by previously using a mixture of acetone or ethyl acetate or a mixture of the two, or a mixture of ethyl acetate and butyl acetate or a mixture of acetone and butyl acetate. An equivalent amount of ethyl acetate can be used instead of acetone, and an equivalent amount of butyl acetate can be used instead of amyl acetate.

The method for coating the artificial pearl of the present invention is as follows: 釆 coating the artificial pearl pellet with at least two times with the above coating; using the first coating coating, the second coating coating, and the artificial pearl pellet sequentially Coating the third coating material; repeatedly applying the artificial pearl pellet to the small ball by using any one of the first coating coating, the second coating coating and the third coating coating; The pellets are coated at least twice with either of the first coating coating, the second coating coating, and the third coating coating. '

The invention has the beneficial effects of:

The invention provides a formula of an artificial pearl coating which is non-toxic and harmless to the human body and a pearl which is non-toxic and harmless to the human body. The coating does not contain heavy metals such as lead and has no pollution to the environment. Since the celluloid use amount of the present invention is much smaller than that of the prior art, the paint is made thinner, the dyeing time is fast, and the drying time is short, overcoming the deficiencies of the prior art. Meanwhile, in the case where the amount of the plasticizer cellophane of the present invention is small, a small amount of camphor is added as a synergist, and the effect thereof is to adjust the viscosity of the coating on the one hand, and to make the dyeing effect more uniform on the other hand, thereby increasing the appearance of the finished product. effect. In addition, due to factors such as the use of cellophane and antimony trichloride, the raw material cost of the product is reduced by about 20% compared with the prior art.

detailed description The artificial pearl coating of the present invention comprises: dissolving cellophane, camphor in a mixture of acetone and ethyl acetate, a mixture of butyl acetate (or butyl acetate) and amyl acetate, and adding a pigment to the solution to obtain a first coating layer. And a second coating; or after dissolving cellophane and camphor in ethyl acetate and butyl acetate, adding a pigment to the solution to obtain a third coating. The first coating coating of the artificial pearl coating in the present embodiment is a celluloid having a weight ratio of '1.5-6%, a camphor with a weight ratio of 0.1-0.6%, and 3 in acetone and ethyl acetate. : 7 mixture and 30-60% by weight of ethyl acetate and amyl acetate 7:3 mixture 30-60% by weight of the content of the solution, after adding 3 - 8% by weight of the pigment to the solution to obtain ^.

In the second coating material of the invention, the weight ratio of the cellophane is 1.5-6%, the weight ratio is 0.1-0.6% of camphor, and the weight ratio of the acetone to ethyl acetate is 3:7. 15-45%, the weight ratio of butyl acetate and amyl acetate to 7:3 is 35-80%, and cellophane is dissolved in a mixture of acetone and ethyl acetate and a solution of butyl acetate and amyl acetate.

The third coating material of the invention is a cellophane with a weight ratio of 1.5-6%, a camphor weight content of 0.1-0.6% by weight, dissolved in a weight ratio of 18-88% and a butyl acetate ratio of 40-80. The mixture of % is then added to the pigment in a weight ratio of 1 to 8%.

In the above first coating and second coating formulations, the weight ratio of acetone to ethyl acetate is preferably 3:7. If too much acetone is added, the characteristic odor of acetone is increased. After coating, it cannot be synchronized with other work due to rapid drying. On the contrary, if too much ethyl acetate is used, the cellulite is completely dissolved for a long time, and the gloss is not good.

In the present invention, a resin containing camphor is used instead of the conventional nitrocellulose as a plasticizer; the solvent is dissolved by using acetone, ethyl acetate and butyl acetate, and the lubricating acetic acid and pentanol are used here. The amyl acetate is esterified, and at the same time, the ratio between them is formed to form the coating closest to the natural pearl.

In the first coating layer and the second coating layer, the ratio of the above butyl acetate to amyl acetate is set to 7:3, and butyl acetate may also be used as needed.

The pigment used in the present invention is a liquid pearl pigment mainly composed of ruthenium oxychloride which is pearlescent. If necessary, a mixture of 10 to 40% by weight of bismuth oxychloride liquid pearl pigment and 60 to 90% by weight of titanium dioxide powder can also achieve better results.

Hereinafter, the artificial pearl paint of the present invention and a production method will be described in more detail by way of preferred embodiments.

Example 1

Put 0.8 kg of celluloid fragments and 0.08 kg of camphor in a 20-liter container, add 3 kg of acetone, 7 kg of ethyl acetate, and stir. In the process of stirring, add 7 kg of butyl acetate and pentane acetate. 3 kg of ester, stirred under viscous state, and then added with 1.2 kg of liquid bismuth oxychloride as the main component of the liquid pigment, until the pigment particles are completely dissolved in the container, and finally a viscous liquid is obtained, that is, the first Secondary coating. The celluloid, camphor, ethyl acetate, acetone, butyl acetate and amyl acetate were mixed and reacted as in the above procedure, but the contents of acetone and ethyl acetate were 2.4 kg and 5.6 kg, respectively, and butyl acetate and The content of amyl acetate was 8.4 kg and 3.6 kg, respectively, and then 1.2 kg of a liquid pigment containing ruthenium oxychloride as a main component was added to obtain a second coating. . '

As in the above procedure, 0.8 kg of celluloid fragments, 0.1 kg of camphor were placed in a 20 liter vessel, 6 kg of ethyl acetate was added to the vessel, and stirring was carried out. During the stirring, butyl acetate 14 was added. After the kilogram, a third coating material can be obtained by adding 0.6 kg of a liquid pigment containing ruthenium oxychloride as a main component to the vessel and stirring uniformly.

First, put the artificial pearl pellets into the coating of the first coating paint, dry them at 45 degrees Celsius for 20 minutes, then put them into the coating of the second coating, and dry them; then, put the balls into the first The coating is applied to the three-coat coating, and the finished artificial pearl is obtained after drying.

The artificial pearl obtained in the above step has a lead content of 0.0025% (25 PPM) or less. If a pigment of a desired color is added to the coating solution, a pearl which is as shiny and beautiful as a natural pearl can be obtained.

Example 2:

This example differs from Example 1 in that the content of cellophane in the first coating material is 0.8 kg, the content of camphor is 0.1 kg, the acetone is 3.2 kg, the ethyl acetate is 7.36 kg, and the butyl acetate is 8.5 kg. , the content of amyl acetate is 3.66 kg, the content of pigment is 1.28 kg; the content of cellophane in the second coating is 0.8 kg, the content of camphor is 0.11 kg, the content of acetone is 2.25 kg, the content of ethyl acetate 5.25 kg, the content of butyl acetate is 9.45 kg, the content of amyl acetate is 3.05 kg, and the content of pigment is 3 kg; the content of cellophane in the third coating is 0.8 kg, the content of camphor is 0.12 kg, acetic acid The content of the ethyl ester was 5.46 kg, the content of 'butyl acetate was 12.55 kg, and the content of the pigment containing antimony trichloride as the main component was 0.27 kg. The remaining steps are the same as in the first embodiment. Example 3 _:

The difference between this embodiment and Example 1 is that the content of cellophane in the first coating material is 0.9 kg, the content of camphor is 0.07 kg, the acetone is 3.15 kg, the ethyl acetate is 7.35 kg, and the butyl acetate is 6.93 kg. The amyl acetate is 2.97 kg, the content of the pigment containing ruthenium oxychloride is 0.6 kg; the content of the cellophane in the second coating is 0.8 kg, the content of camphor is 0.1 kg, acetone and ethyl acetate The contents are 2.4 kg and 5.6 kg, respectively, and the contents of butyl acetate and amyl acetate are S. 4 kg and 3.6 kg, respectively, followed by the addition of 1.2 kg of liquid pigment containing bismuth oxychloride as the main component, without the need for a third coating. In the layer coating, the artificial pearl having the same effect as in Example 1 was obtained by repeatedly coating the small ball with the first coating paint and the second coating paint.

Example 4:

The difference between this embodiment and Example 1 is that the content of cellophane in the first coating material is 0.9 kg, the content of camphor is 0.09 kg, the acetone is 3.15 kg, the ethyl acetate is 7.35 kg, and the butyl acetate is 6.93 kg. , the amyl acetate is 2.97 kg, the content of the pigment containing ruthenium oxychloride is 0.6 kg; the celluloid in the third coating The content of strontium is 0.9 kg, the content of camphor is 0.11 kg, the content of ethyl acetate is 5.7 kg, the content of butyl acetate is 15.15 kg, and the content of pigment is 0.25 kg. In this embodiment, there is no second coating. The artificial pearl having substantially the same effect as that of the embodiment 1 can be obtained by repeatedly coating the small ball with the first coating paint and the third coating paint. Example 5:

The celluloid, camphor, ethyl acetate, acetone, butyl acetate and amyl acetate were mixed in the same manner as in Example 1. The celluloid content was 0.8 kg, the content of camphor was 0.11 kg, and acetone and acetic acid were placed. The content of the ester was 2.4 kg and 5.6 kg, respectively, and the contents of butyl acetate and amyl acetate were 8.4 kg and 3.6 kg, respectively, and then 1.2 kg of a liquid pigment containing ruthenium oxychloride as a main component was added to obtain a coating for the second coating layer. . Then, the artificial pearl beads are repeatedly coated with the paint to obtain the finished artificial pearl.

Example 6:

The difference between this embodiment and Example 1 is that the content of cellophane in the first coating material is 0.6 kg, the content of cerium is 0.11 kg, the acetone is 3.15 kg, the ethyl acetate is 7.35 kg, and the butyl acetate is 6.93. In kilograms, amyl acetate is 2.97 kg, the content of pigment with ruthenium oxychloride as main component is 0.6 kg; the content of cellophane in the third coating is 0.9 kg, and the content of camphor is 0.06 kg, ethyl acetate The content is 5.7 kg, the content of butyl acetate is 15.15 kg, and the content of pigment is 0.35 kg. In this embodiment, there is no second coating coating, and the small coating is repeated with the first coating paint and the third coating paint. The artificial pearl having substantially the same effects as in Example 1 was obtained by coating.

Example 7

The difference between this embodiment and Example 1 is that the pigment in the first layer and the second layer of paint is replaced by a mixture of 0.8 kg of titanium dioxide and 0.4 kg of antimony trichloride.

The components in the first coating paint, the second coating paint, and the third coating paint in the present invention may be added as needed within a set range.

Preferably, the artificial pearl of the present invention is produced by continuously applying the first coating material for coating, the coating material for the second coating layer and the coating material for the third coating layer in the same manner as in the first embodiment, or omitting any one of the coating materials or repeating Use a coating for coating.

The above-described method of using the coating material of the present invention may be carried out by spraying, 'immersion or brushing, or the like. In the state of use of the celluloid, the cellophane may be placed in a pre-dissolved state with acetone and ethyl acetate, and stored, and the remaining components may be added in ratios as needed.

In the present invention, the content of each component is not fixed, and the component may be set or changed as needed. Pigments It is also possible to use a conventional lead carbonate instead of a mixture of ruthenium oxychloride or ruthenium oxychloride.

Claims

Claim

A paint for artificial pearls, characterized in that the composition comprises, by weight ratio: 1.5-6% of cellophane, 86-95% of esterified solvent, 1-8% of pigment, wherein the esterified solvent is acetone or ethyl acetate or two A mixture of the mixture and a mixture of butyl acetate or / and amyl acetate.

The artificial pearl paint according to claim 1, wherein a camphor is added in a weight ratio of 0.1 to 0.6%.

The artificial pearl paint according to claim 1, wherein the cellophane has a weight ratio of 1.5 to 6%, and the esterification solvent comprises a mixture of acetone and ethyl acetate and a mixture of butyl acetate and amyl acetate. , wherein the mixture of acetone and ethyl acetate has a weight ratio of 30-60%, the mixture of butyl acetate and amyl acetate has a weight ratio of 30-60%, and the weight ratio of camphor is 0.1-0.6%, pigment It is bismuth oxychloride, and its weight ratio is 3-8%, which is called the first coating material.

The artificial pearl paint according to claim 1, wherein the cellophane has a weight ratio of 1.5 to 6%, and the esterification solvent comprises a mixture of acetone and ethyl acetate and a mixture of butyl acetate and amyl acetate. , wherein the mixture of acetone and ethyl acetate has a weight ratio of 15-45%, the weight ratio of butyl acetate to amyl acetate is 35-80%, the weight ratio of camphor is 0.1-0.6%, and the pigment is three. The bismuth oxychloride is present in a weight ratio of 1-8%, which is referred to as a second coating.

The artificial pearl paint according to claim 3 or 4, wherein the mixture ratio of acetone and ethyl acetate is: 0-30% of acetone, 70-100% of ethyl acetate; The weight ratio of the mixture of ester and amyl acetate is: 70-100% of butyl acetate and 0-30% of amyl acetate.

The paint for artificial pearl according to claim 1, wherein the cellophane has a weight ratio of 1.5 to 6%, and the esterification solvent comprises ethyl acetate and butyl acetate, wherein the weight ratio of ethyl acetate is 16-38%, the weight ratio of butyl acetate is 40-80%, the weight ratio of camphor is 0.1-0.6%, and the pigment is bismuth oxychloride. The weight ratio is 1-8%. Third coating.

The artificial pearl paint according to claim 3, 4 or 6, wherein the amount of butyl acetate added to each layer of the coating is increased as compared with the amount of the preceding layer.

The artificial pearl coating according to claim 3, 4 or 6, wherein: part of the bismuth oxychloride is replaced by titanium dioxide, and the weight ratio of the two to the pigment is 60-90% of titanium dioxide, bismuth oxychloride 10-40%.

A method for producing an artificial pearl paint, comprising the steps of:

a mixture of crucible in a weight ratio of 1.5-6% and an esterification solvent having a weight ratio of 86-95%; wherein the esterification solvent consists of a mixture of acetone and ethyl acetate and a mixture of butyl acetate and amyl acetate. Or consist of ethyl acetate and acetonate.

b. Stir until the paste state, and add the pigment at a weight ratio of 1-8% to stir.

The method for producing a synthetic pearl paint according to claim 9, wherein the weight ratio is 1.5-6%. The celluloid and the weight ratio of 86-95% of the esterified solvent are mixed and added to a weight ratio of 0.1-0.6% camphor.

The method for producing a synthetic pearl paint according to claim 9, wherein the celluloid is previously used with acetone or ethyl acetate or a mixture of the two or a mixture of ethyl acetate and butyl acetate or acetone and acetic acid. The mixture of butyl ester was dissolved for use.

The method for producing an artificial pearl paint according to claim 11, wherein an acetone is replaced by an equivalent amount of ethyl acetate, and an equivalent amount of butyl acetate is used in place of amyl acetate.

A method of coating an artificial pearl, characterized in that the artificial pearl pellet is coated at least twice with the above coating.

The method for coating artificial pearl according to claim 13, wherein: the artificial pearl pellet is sequentially coated with the first coating paint, the second coating paint, and the third coating paint in sequence. .

The method for coating an artificial pearl according to claim 14, wherein: the artificial pearl pellet is made small by using any one of a first coating paint, a second coating paint, and a third coating paint. The ball is repeatedly coated.