CN106280688B - Alkali-soluble UV coating for cutting 3C product glass screen and preparation method thereof - Google Patents

Abstract

The invention discloses an alkali-soluble UV coating for cutting and processing a 3C product glass screen and a preparation method thereof, wherein the ink comprises the following components in percentage by weight: 25-40% of bifunctional polyester acrylate, 25-40% of styrene maleic anhydride copolymer resin, 2-5% of polydipentaerythritol hexaacrylate, 2-5% of a trifunctional phosphate adhesive, 3-5% of an acrylate coupling agent, 10-20% of talcum powder, 1-2% of polytetrafluoroethylene wax powder, 1-2% of phthalocyanine blue, 4-6% of 184, 3-5% of TPO and 0.5-2% of an auxiliary agent. When the UV ink prepared by the invention is applied to a 3C product glass screen, no adhesive is required to be added in site construction, a film can be dissolved into particles to be precipitated to the bottom of an alkali dissolving tank during film removal, the cleaning of a glass processing rear section is convenient and quick, and the trouble of cleaning caused by that the film removal is hung on glass too much can be avoided.

Description

Alkali-soluble UV coating for cutting 3C product glass screen and preparation method thereof

Technical Field

The invention relates to the field of printing ink, in particular to alkali-soluble UV screen printing ink for cutting and processing a 3C product glass screen.

Background

The UV curing coating is a novel coating variety popular in European and American places, Japan and the like at the end of the twentieth century, and is firstly applied to the surface coating treatment of furniture, floors, mobile phones and walkman shells. The UV curing coating has the advantages of no Volatile Organic Compound (VOC), small environmental pollution, high curing speed, energy conservation, good performance of cured products, suitability for high-speed automatic production and the like, is developed rapidly, and the application field of the UV curing coating is further expanded to the fields of household appliances such as cosmetic containers, televisions, computers and the like and other fields such as motorcycles, masks and the like.

The traditional coating is easy to volatilize, has low curing speed and is not beneficial to environmental protection, so the UV coating is a main substitute of the traditional coating. However, currently, baking type glass protection ink and UV type protection ink are mainly used for protecting a mobile phone glass screen, when the baking type protection ink is used, 1-3% of glass adhesion agent must be added on site, after one side is printed, the glass adhesion agent must be baked at 150 ℃ for 15 minutes, after the glass adhesion agent is dried and cooled, the other side can be printed, and then the glass adhesion agent is baked again, so that the efficiency is low, energy is wasted, and the environment is polluted. The existing UV coating needs to add an adhesive agent on a construction site to increase the adhesive force; and when the glass is cut or punched, the film is removed by alkaline water ultrasonic, the UV film can be flaked and fall off, the subsequent cleaning section of the glass screen is difficult, and the effect is not ideal.

Disclosure of Invention

In order to solve the defects of the prior art, the invention provides the alkali-soluble UV screen printing ink for cutting the 3C product glass screen, which has strong adhesive force, is not easy to crack during cutting or punching, has good cutting fluid resistance and has good complete protection effect.

The invention also provides a preparation method of the alkali-soluble UV silk-screen printing ink for cutting and processing the glass screen of the 3C product.

The technical problem to be solved by the invention is realized by the following technical scheme:

an alkali-soluble UV ink for glass screen cutting processing, which comprises the following components in percentage by weight:

25-40% of bifunctional polyester acrylate;

25-40% of styrene maleic anhydride copolymer resin (SMA);

2-5% of polydipentaerythritol hexaacrylate (DPHA);

2-5% of a tri-functional phosphate adhesive;

3-5% of an acrylate coupling agent;

10-20% of talcum powder;

1-2% of polytetrafluoroethylene wax powder;

1-2% of phthalocyanine blue;

184 4~6%；

TPO 3~5%；

0.5-2% of an auxiliary agent;

wherein the acid value of the bifunctional polyester acrylate is 35-45, and the acid value of the styrene maleic anhydride copolymer resin is 360-370.

The invention adopts the difunctional polyester acrylate with a specific acid value as one of the main body resins, and has the advantages of good adhesive force on glass, high curing speed, good acid resistance, high hardness and resistance to cutting fluid soaking; styrene maleic anhydride copolymer resin with high acid value is used as another main resin which is insoluble in water and soluble in alkaline water, and can adjust the solubility of the UV film in the alkaline water; DPHA is a hexa-functional acrylate monomer, has drying speed and water resistance, and endows the ink with higher hardness; the tri-functional phosphate ester adhesion agent improves the adhesion force of the UV film during curing; the acrylate coupling agent improves the water resistance of the UV film, and prevents the problems of poor water resistance, foaming when meeting water and falling off in the CNC technological process. The single-component UV ink prepared by the invention does not need to add an adhesive in field construction, the film can be dissolved into particles to be precipitated at the bottom of the alkali dissolving tank during film stripping, the cleaning of the rear section of glass processing is convenient and quick, and the trouble of cleaning caused by hanging the film on the glass due to too large stripping can be avoided.

Preferably, the ink comprises the following components in percentage by weight:

30-33% of bifunctional polyester acrylate;

30-33% of styrene maleic anhydride copolymer resin;

2-3% of polydipentaerythritol hexaacrylate;

2-3% of a tri-functional phosphate adhesive;

3-5% of an acrylate coupling agent;

14-16% of talcum powder;

1-2% of polytetrafluoroethylene wax powder;

1-2% of phthalocyanine blue;

0.3-1% of defoaming agent;

0.5-1% of a leveling agent;

184 4~6%；

TPO 3~5%；

wherein the acid value of the bifunctional polyester acrylate is 35-45, and the acid value of the styrene maleic anhydride copolymer resin is 360-370.

Preferably, the phthalocyanine blue is P.B15:3, and is used for providing color, absorbing UV light, protecting glass and preventing the UV irradiation glass from yellowing. Phthalocyanine blue P.B15:3, wherein phthalocyanine blue ink and phthalocyanine blue pigment are prepared from phthalocyanine blue pigment powder.

Preferably, the defoamer is a teuqia 6800 defoamer, solvent free.

Preferably, the leveling agent is digao 410 leveling agent, and contains no solvent.

The polytetrafluoroethylene wax powder is used for improving the surface hardness and the scratch resistance.

The 184 is 1-hydroxycyclohexyl phenyl ketone and a conventional surface layer initiator, and has the characteristics of low price, quick drying, surface drying, yellowing resistance and the like.

The TPO is 2,4, 6-trimethyl benzoyl ethyl phosphonate, and a conventional deep initiator, and has the characteristics of quick drying, yellowing resistance and the like.

The preparation method of the UV ink comprises the following steps:

s1, mixing the difunctional polyester acrylate, the styrene maleic anhydride copolymer resin, the poly dipentaerythritol hexaacrylate and the auxiliary agent, and stirring for 5-10 minutes at the rotating speed of 800-1000 revolutions per minute;

s2, adding talcum powder, polytetrafluoroethylene wax powder and phthalocyanine blue into the mixture, stirring for 5-10 minutes at a rotating speed of 800-1000 rpm, and stirring for 40-60 minutes at a rotating speed of 1400-1600 rpm until the dispersion fineness of the raw materials is less than or equal to 15 um;

s3, reducing the stirring speed to 800-1000 rpm, adding TPO and 184, stirring for 5-10 minutes, and cooling to normal temperature;

and S4, adding the trifunctional phosphate ester adhesion agent and the acrylate coupling agent, stirring for 5-10 minutes at the rotating speed of 800-1000 rpm until the mixture is uniformly stirred, and filtering and packaging by using a 200-mesh net.

The invention also discloses application of the UV ink in cutting and processing of the 3C product glass screen.

Compared with the prior art, the invention has the following beneficial effects:

the alkali-soluble UV silk-screen printing ink for cutting the 3C product glass screen is green and pollution-free, does not contain volatile solvent, and improves the production efficiency; the glass is not easy to crack and fall off when being cut or punched by a CNC (computerized numerical control) process after being cured on a 3C product glass screen, and the film has good film forming effect, wear resistance and scraping resistance; the glass is ultrasonically cleaned for 2-3 minutes at 70-80 ℃ by adopting a 5% sodium hydroxide aqueous solution, the UV curing film can be dissolved and fall off, large pieces of UV curing film cannot fall off, and the glass processing back section is conveniently and quickly cleaned.

Drawings

FIG. 1 is a graph showing the effect of dissolving the film into rice grains after alkali dissolution.

FIG. 2 is a filtration chart of the residue after the alkali dissolution.

FIG. 3 is a graph showing the effect of flaking off of a film after alkali dissolution.

Detailed Description

The invention will be further illustrated with reference to specific examples, which use the following starting materials:

bifunctional polyester acrylate: lucore 5215 by ruao chemical ltd;

styrene maleic anhydride copolymer resin (SMA): SZ33030 by ruao chemical limited;

trifunctional phosphate adhesion agent: CD9051 by sartomer, usa;

acrylate coupling agent: KH570, guangzhou fine chemical company, peach kernel, inc;

phthalocyanine blue: P.B15: 3: philippine blue predispersion pigment of Shenzhen Henjie trade Limited.

Defoaming agent: modesty 6800 antifoam;

leveling agent: digao 410 leveling agent.

Other ones not specifically designated are common commercial products.

Example 1

The ink comprises the following components in percentage by weight:

30% of bifunctional polyester acrylate;

30% of styrene maleic anhydride copolymer resin;

DPHA 2%；

2% of a tri-functional phosphate adhesion agent;

3% of acrylate coupling agent;

16% of talcum powder;

2% of polytetrafluoroethylene wax powder;

2% of phthalocyanine blue;

1% of defoaming agent;

1% of a leveling agent;

184 6%；

TPO 5%；

the preparation process comprises the following steps:

s1, putting the difunctional polyester acrylate, the styrene maleic anhydride copolymer resin, the DPHA, the defoaming agent and the flatting agent into a stirring barrel, and stirring for 10 minutes at the rotating speed of 800 revolutions per minute;

s2, adding talcum powder, polytetrafluoroethylene wax powder and phthalocyanine blue into the stirring barrel, stirring for 10 minutes at the rotating speed of 800 revolutions per minute, and stirring for 60 minutes at the rotating speed of 1400 revolutions per minute until the dispersion fineness of the raw materials is less than or equal to 15 um;

s3, reducing the stirring speed to 800 revolutions per minute, adding TPO and 184, stirring for 10 minutes, stopping the machine, and cooling to the normal temperature;

and S4, adding the trifunctional phosphate ester adhesion agent and the acrylate coupling agent, stirring for 10 minutes at the rotating speed of 800 revolutions per minute until the components are uniformly stirred, stopping the machine, sampling and inspecting, and filtering and packaging by using a 200-mesh net after the components are qualified.

Example 2

The ink comprises the following components in percentage by weight:

33% of bifunctional polyester acrylate;

33% of styrene maleic anhydride copolymer resin;

3% of a 6-functional monomer DPHA;

3% of a tri-functional phosphate adhesion agent;

4.2% of an acrylate coupling agent;

14% of talcum powder;

1% of polytetrafluoroethylene wax powder;

1% of phthalocyanine blue;

0.3 percent of defoaming agent;

0.5 percent of leveling agent;

184 4%；

TPO 3%；

the preparation process comprises the following steps:

s1, putting the difunctional polyester acrylate, the styrene maleic anhydride copolymer resin, the DPHA, the defoaming agent and the flatting agent into a stirring barrel, and stirring for 5 minutes at the rotating speed of 1000 revolutions per minute;

s2, adding talcum powder, polytetrafluoroethylene wax powder and phthalocyanine blue into the stirring barrel, stirring for 5 minutes at the rotating speed of 1000 revolutions per minute, and stirring for 40 minutes at the rotating speed of 1600 revolutions per minute until the dispersion fineness of the raw materials is less than or equal to 15 um;

s3, reducing the stirring speed to 1000 rpm, adding TPO and 184, stirring for 58 minutes, stopping the machine, and cooling to the normal temperature;

and S4, adding the trifunctional phosphate ester adhesion agent and the acrylate coupling agent, stirring for 5 minutes at the rotating speed of 1000 revolutions per minute until the mixture is uniformly stirred, stopping the machine, sampling and inspecting, and filtering and packaging by using a 200-mesh net after the mixture is qualified.

Example 3

The ink comprises the following components in percentage by weight:

31% of bifunctional polyester acrylate;

32% of styrene maleic anhydride copolymer resin;

DPHA 2%；

2.5% of a tri-functional phosphate adhesion agent;

5% of acrylate coupling agent;

14.5 percent of talcum powder;

1.5 percent of polytetrafluoroethylene wax powder;

1.5 percent of phthalocyanine blue;

0.5 percent of defoaming agent;

0.5 percent of leveling agent;

184 5%；

TPO 4%；

the preparation process comprises the following steps:

s1, putting the difunctional polyester acrylate, the styrene maleic anhydride copolymer resin, the DPHA, the defoaming agent and the flatting agent into a stirring barrel, and stirring for 10 minutes at the rotating speed of 800 revolutions per minute;

s2, adding talcum powder, polytetrafluoroethylene wax powder and phthalocyanine blue into the stirring barrel, stirring for 10 minutes at the rotating speed of 800 revolutions per minute, and stirring for 40 minutes at the rotating speed of 1500 revolutions per minute until the dispersion fineness of the raw materials is less than or equal to 15 um;

s3, reducing the stirring speed to 800 revolutions per minute, adding TPO and 184, stirring for 10 minutes, stopping the machine, and cooling to the normal temperature;

and S4, adding the trifunctional phosphate ester adhesion agent and the acrylate coupling agent, stirring for 10 minutes at the rotating speed of 800 revolutions per minute until the components are uniformly stirred, stopping the machine, sampling and inspecting, and filtering and packaging by using a 200-mesh net after the components are qualified.

Example 4

40% of bifunctional polyester acrylate;

25% of styrene maleic anhydride copolymer resin;

5% of polydipentaerythritol hexaacrylate;

2% of a tri-functional phosphate adhesion agent;

3% of acrylate coupling agent;

10% of talcum powder;

1-2% of polytetrafluoroethylene wax powder;

1-2% of phthalocyanine blue;

184 5%；

TPO 5%；

0.5 percent of defoaming agent;

0.5 percent of leveling agent;

the preparation process comprises the following steps: an ink was prepared as described in example 1.

Example 5

25% of difunctional polyester acrylate;

40% of styrene maleic anhydride copolymer resin;

2% of polydipentaerythritol hexaacrylate;

5% of a tri-functional phosphate adhesion agent;

3% of acrylate coupling agent;

16.5 percent of talcum powder;

1% of polytetrafluoroethylene wax powder;

1% of phthalocyanine blue;

184 3%；

TPO 3%；

0.3 percent of defoaming agent;

0.2% of leveling agent;

the preparation process comprises the following steps: an ink was prepared as described in example 1.

Comparative example 1

The bifunctional polyester acrylate of example 1 was replaced with a bifunctional polyester acrylate having an acid value of 20 (DY 2620 available from Geigy Hipposhu Co., Ltd.), and the other procedure was repeated in the same manner as in example 1.

Comparative example 2

The procedure of example 1 was repeated except that the styrene-maleic anhydride copolymer resin of example 1 was replaced with a styrene-maleic anhydride copolymer resin having an acid value of 0 (26080 of SZ of Ruo chemical Co., Ltd.).

Comparative example 3

30% of bifunctional polyester acrylate;

30% of acrylate resin;

DPHA 2%；

2% of a tri-functional phosphate adhesion agent;

3% of acrylate coupling agent;

16% of talcum powder;

2% of polytetrafluoroethylene wax powder;

2% of phthalocyanine blue;

1% of defoaming agent;

1% of a leveling agent;

184 6%；

TPO 5%；

the preparation process comprises the following steps: the procedure was as in example 1, except that the styrene maleic anhydride copolymer resin was replaced with an acrylate resin.

Comparative example 4

54% of difunctional polyester acrylate;

IBOMA 2%；

THFA 3%；

DPHA 8%；

23% of talcum powder;

1% of polytetrafluoroethylene wax powder;

1% of phthalocyanine blue;

1% of defoaming agent;

1% of a leveling agent;

184 5%；

TPO 1%。

the preparation process comprises the following steps:

s1, adding the difunctional polyester acrylate, IBOMA, THFA, DPHA, the defoaming agent and the leveling agent into a stirring barrel, stirring for 10 minutes at the rotating speed of 800 revolutions per minute until the added raw materials are uniformly stirred;

s2, adding the talcum powder, the polytetrafluoroethylene wax powder and the phthalocyanine blue into the uniformly stirred raw materials, stirring for 10 minutes at the rotating speed of 800 revolutions per minute until the talcum powder, the polytetrafluoroethylene wax powder and the phthalocyanine blue are uniformly stirred, and stirring for 50 minutes at the rotating speed of 1500 revolutions per minute until the dispersion fineness of the talcum powder, the polytetrafluoroethylene wax powder and the phthalocyanine blue is less than or equal to 15 microns;

s3, reducing the stirring speed to 800 revolutions per minute, adding TPO and 184, stirring for 10 minutes at the rotating speed of 800 revolutions per minute until TPO and 184 are completely dissolved, stopping the machine, covering the machine, and waiting for 3 hours until the temperature of the raw materials is reduced to be close to the normal temperature;

and S4, filtering and packaging the qualified product by using a 200-mesh net.

Comparative example 5

31% of bifunctional polyester acrylate;

32% of styrene maleic anhydride copolymer resin;

DPHA 2%；

2.5% of difunctional phosphate;

5% of epoxy type coupling agent;

14.5 percent of talcum powder;

1.5 percent of polytetrafluoroethylene wax powder;

1.5 percent of phthalocyanine blue;

0.5 percent of defoaming agent;

0.5 percent of leveling agent;

184 5%；

TPO 4%；

wherein the difunctional phosphate is EM39 (2-hydroxyethyl methacrylate phosphate) of Changxing chemical materials GmbH of Taiwan, China, and the epoxy type coupling agent is Z6040 of Kayin chemical engineering of Shanghai.

The preparation process comprises the following steps: the procedure was as in example 3 except that the trifunctional phosphate ester adhesion agent was replaced with the difunctional phosphate ester adhesion agent and the acrylate ester coupling agent was replaced with the epoxy-type coupling agent.

Comparative example 6

The ink comprises the following components in percentage by weight:

60% of bifunctional polyester acrylate;

DPHA 2%；

2% of a tri-functional phosphate adhesion agent;

3% of acrylate coupling agent;

16% of talcum powder;

2% of polytetrafluoroethylene wax powder;

2% of phthalocyanine blue;

1% of defoaming agent;

1% of a leveling agent; (ii) a

184 6%；

TPO 5%；

The preparation process comprises the following steps: an ink was prepared as described in example 1.

The printing ink obtained in each example and comparative example is printed on a piece of mobile phone glass by silk screen printing, the front surface of the glass is printed by a 300-mesh screen and cured by a UV machine, the back surface of the glass is also printed by a 300-mesh screen and cured by a UV machine, the glass is cut, CNC (computerized numerical control) punching is carried out, edge grinding is carried out, inspection and alkali washing are carried out, and the relevant performance is measured, and the specific result is shown in Table 1.

The properties in table 1 were measured as follows:

fineness: according to the test method of GB/T6753.1-2007;

adhesion force: the determination is carried out according to a paint film cross-cut test of GB/T9286-1998;

gloss: the determination is carried out according to the determination of mirror gloss of 20 degrees, 60 degrees and 85 degrees of paint films of GB 9754-2007 color paint and varnish which do not contain metal pigments;

hardness: according to the test method of GB/T6739-20066;

cutting fluid resistance: test method GB/T1733-1993 is adopted.

Appearance of the decoloured film: visual inspection was carried out.

With reference to fig. 1, it can be seen that the alkali-soluble UV screen printing ink prepared by the method of the present invention has good alkali-dissolving effect, can be rapidly dissolved into small rice grains, and is easy to clean the glass screen.

The above-mentioned embodiments only express the embodiments of the present invention, and the description is more specific and detailed, but not understood as the limitation of the patent scope of the present invention, but all the technical solutions obtained by using the equivalent substitution or the equivalent transformation should fall within the protection scope of the present invention.

Claims (4)

1. An alkali-soluble UV ink, characterized in that it comprises the following components in percentage by weight:

25-40% of bifunctional polyester acrylate;

25-40% of styrene maleic anhydride copolymer resin;

2-5% of polydipentaerythritol hexaacrylate;

2-5% of a tri-functional phosphate adhesive;

3-5% of an acrylate coupling agent;

10-20% of talcum powder;

1-2% of polytetrafluoroethylene wax powder;

1-2% of phthalocyanine blue;

184 4~6%；

TPO 3~5%；

0.5-2% of an auxiliary agent;

wherein the acid value of the bifunctional polyester acrylate is 35-45, and the acid value of the styrene maleic anhydride copolymer resin is 360-370.

2. The UV ink according to claim 1, characterized in that it comprises the following components in percentage by weight:

30-33% of bifunctional polyester acrylate;

30-33% of styrene maleic anhydride copolymer resin;

2-3% of polydipentaerythritol hexaacrylate;

2-3% of a tri-functional phosphate adhesive;

3-5% of an acrylate coupling agent;

14-16% of talcum powder;

1-2% of polytetrafluoroethylene wax powder;

1-2% of phthalocyanine blue;

0.3-1% of defoaming agent;

0.5-1% of a leveling agent;

184 4~6%；

TPO 3~5%；

wherein the acid value of the bifunctional polyester acrylate is 35-45, and the acid value of the styrene maleic anhydride copolymer resin is 360-370.

3. A method for preparing the UV ink according to claim 1 or 2, characterized by comprising the steps of:

s1, mixing the difunctional polyester acrylate, the styrene maleic anhydride copolymer resin, the poly dipentaerythritol hexaacrylate and the auxiliary agent, and stirring for 5-10 minutes at the rotating speed of 800-1000 revolutions per minute;

s2, adding talcum powder, polytetrafluoroethylene wax powder and phthalocyanine blue into the mixture, stirring for 5-10 minutes at a rotating speed of 800-1000 rpm, and stirring for 40-60 minutes at a rotating speed of 1400-1600 rpm until the dispersion fineness of the raw materials is less than or equal to 15 um;

s3, reducing the stirring speed to 800-1000 rpm, adding TPO and 184, stirring for 5-10 minutes, and cooling to normal temperature;

and S4, adding the trifunctional phosphate ester adhesion agent and the acrylate coupling agent, stirring for 5-10 minutes at the rotating speed of 800-1000 rpm until the mixture is uniformly stirred, and filtering and packaging by using a 200-mesh net.

4. Use of a UV ink according to claim 1 or 2 for the cutting process of glass screens for 3C products.

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