Noise-reducing ultraviolet curing coating as well as preparation method and application thereof

Abstract

The invention discloses a noise-reducing ultraviolet photocureable coating as well as a preparation method and application thereof, and belongs to the technical field of photocureable coatings. The coating comprises a coating main agent and a composite diluent, the coating main agent comprises the following raw materials in parts by weight: 15-20 parts of acrylic resin A; 10 to 15 parts of acrylic resin B; 5-15 parts of acrylic resin C; 1.2-2 parts of a photoinitiator and 10-16 parts of polyethylene wax slurry; 1-3 parts of polytetrafluoroethylene wax powder; the composite diluent comprises at least two of ethylene glycol monobutyl ether, ethyl acetate, methyl isobutyl ketone, isopropanol and n-butyl alcohol; the models of three acrylic resins and the mass ratio of the coating main agent to the composite diluent are limited. The coating disclosed by the invention has good noise reduction, skin feeling and stain resistance, has various conventional properties of the coating, can be coated on a base material, particularly an electronic product, avoids the noise generated by collision or friction of components such as a rotating shaft when the electronic product is folded or in surface contact, and meets the performance requirements of more electronic product shells.

Description

Technical Field

[0001] The invention relates to the technical field of photocurable coatings, and in particular to a noise-reducing violet light-curable coating and a preparation method and application thereof. Background Art

[0002] With the improvement of living standards, people have higher and higher requirements for the experience of consumer electronic products. Many electronic products will collide and rub during use, thus generating noise, such as: the collision sound when folding mobile phones and laptops are shut down, the friction sound of the hinges, etc.

[0003] Therefore, how to provide a coating with good noise reduction function is a technical problem to be solved urgently in this field. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a noise-reducing ultraviolet light-curing coating, a preparation method thereof, and an application thereof. The coating of the present invention has excellent properties such as noise reduction, skin feel, and stain resistance, and at the same time has various conventional properties of coatings, and can be directly or indirectly coated on various substrates, especially electronic products, to avoid collisions when electronic products are folded or in contact with the surface, or noise caused by friction of components such as shafts, and can meet the performance requirements of more electronic product shells.

[0005] The technical solution of the present invention is as follows:

[0006] The first aspect of the present invention provides a noise reduction ultraviolet light curing coating, the noise reduction ultraviolet light curing coating comprises a coating main agent and a composite diluent;

[0007] The coating main agent comprises the following raw materials in parts by weight:

[0008] 15-20 parts of acrylic resin A; 10-15 parts of acrylic resin B; 5-15 parts of acrylic resin C; 1.2-2,2 parts of photoinitiator, 10-16 parts of polyethylene wax slurry; 1-3 parts of polytetrafluoroethylene wax powder;

[0009] The composite diluent includes at least two of ethylene glycol monobutyl ether, ethyl acetate, methyl isobutyl ketone, isopropanol, and n-butanol;

[0010] The acrylic resin A is a trifunctional aliphatic polyurethane acrylate;

[0011] And / or, the acrylic resin B is a silicone-modified UV-curable self-healing resin;

[0012] And / or, the acrylic resin C is a hexafunctional, stain-resistant aliphatic polyurethane acrylate;

[0013] And / or, the mass ratio of the coating main agent to the composite diluent is 100:100-150.

[0014] Preferably, in the coating main agent, the acrylic resin A includes UA-1808 of JSD Fine Chemicals;

[0015] And / or, the acrylic resin B comprises EBECRYL 8296 of allnex Chemical;

[0016] And / or, the acrylic resin C includes SU-5001 of Rockt Chemical.

[0017] Preferably, the photoinitiator comprises double-bond chemically 1-hydroxycyclohexyl phenyl ketone;

[0018] And / or, the polyethylene wax slurry includes FA-341 of Gifu Chemical;

[0019] And / or, the polytetrafluoroethylene wax powder includes KTL-2N produced by Shanghai Yile Chemical.

[0020] Preferably, the composite diluent is obtained by mixing 10-15 parts of ethylene glycol monobutyl ether, 45-55 parts of ethyl acetate, 13-18 parts of methyl isobutyl ketone, 13-18 parts of isopropyl ketone, and 5-10 parts of n-butanol.

[0021] Pre-selectedly, the coating main agent also includes 0.5 parts of dispersant; 3.0 parts of anti-fouling agent; 2 parts of anti-scratch leveling agent; 6.3 parts of matting agent; and 30-35 parts of composite diluent I.

[0022] Preferably, the dispersant comprises BYK2008 of BYK Chemical;

[0023] The anti-fouling agent includes DSP-3320 of JST Fine Chemicals;

[0024] The anti-scratch leveling agent includes APU-25 of Jiuwei Chemical;

[0025] The matting agent includes a silicon dioxide matting agent;

[0026] The raw materials and proportions contained in the composite diluent I are the same as those of the composite diluent;

[0027] Preferably, the matting agent includes E-1011 of Tosoh Chemical; the composite diluent I is prepared by mixing 10-15 parts of ethylene glycol monobutyl ether, 45-55 parts of ethyl acetate, 13-18 parts of methyl isobutyl ketone, 13-18 parts of isopropyl ketone, and 5-10 parts of n-butanol.

[0028] The second aspect of the present invention provides a method for preparing the noise reduction UV curing coating according to the first aspect, comprising the following steps:

[0029] S1: preparing a composite diluent: thoroughly mixing 10-15 parts of ethylene glycol monobutyl ether, 45-55 parts of ethyl acetate, 13-18 parts of methyl isobutyl ketone, 13-18 parts of isopropanol and 5-10 parts of n-butanol to obtain a composite diluent;

[0030] The components, proportions and preparation methods of the composite diluent I are the same as those of the composite diluent;

[0031] S2: 1.7 parts of photoinitiator and 10 parts of composite diluent I are fully mixed and dissolved until clear, and then 15-20 parts of acrylic resin A, 10-15 parts of acrylic resin B and 5-15 parts of acrylic resin C, 0.5 parts of dispersant, 3.0 parts of stain resistance additive, 2 parts of scratch resistance leveling agent, 13 parts of polyethylene wax slurry are added, and after stirring and dispersing evenly, 6.3 parts of silicon dioxide matting agent and 2 parts of polytetrafluoroethylene wax powder are added while stirring, and then dispersed and stirred at 800-1000r / min for 30min until the fineness is qualified, and finally 20-25 parts of composite diluent I are added, and the viscosity is adjusted to 30-35s. When the viscosity is qualified, the coating main agent is obtained;

[0032] S3: Mixing the coating main agent of step S2 with the composite diluent prepared in step S1 to obtain the noise reduction violet light curing coating.

[0033] In step S3, the mass ratio of the coating main agent to the composite diluent is 100:100-150.

[0034] The third aspect of the present invention provides an application of the noise reduction UV-curable coating described in the first aspect or the noise reduction UV-curable coating prepared by the preparation method described in the second aspect, which is used for coating on a workpiece to form a film layer;

[0035] The specific application method is: coating the noise reduction ultraviolet curing coating on the surface of the workpiece, and curing after baking to obtain a workpiece containing the coating;

[0036] The baking temperature is 55-65°C and the baking time is 6-7 minutes;

[0037] The curing is UVA curing with an energy of 800-1000mj / cm 2 ;

[0038] The coating has a thickness of 15-25 μm.

[0039] The beneficial technical effects of the present invention are:

[0040] The present invention prepares a noise-reducing ultraviolet light-cured coating by selecting three synergistic resins to cooperate with polyethylene wax slurry and polytetrafluoroethylene wax powder. Among them, acrylic resin A, as the main resin, has good toughness, can meet the mechanical requirements of workpiece folding or friction, and has good stain resistance, excellent self-repairing performance and adhesion. Acrylic resin B can provide good elasticity for the paint film, which can buffer the collision noise when the product is folded, but it will have the problem of back-sticking. Further, by adding acrylic resin C with high hardness, stain resistance and high toughness, the back-sticking of acrylic resin is solved, and the strength and adhesion of the paint film can be further improved in the coating. Polyethylene wax slurry can solve the problem of spraying flower, and polytetrafluoroethylene wax powder improves the silky feeling of the coating surface, reduces the friction noise of parts such as the product shaft, and the addition of anti-scratch leveling agent reduces the surface tension of the coating, can provide a good lubrication effect, further reduce the friction effect, and then reduce the friction of the prepared coating, avoiding the noise problem caused by friction in the use of the product containing the film layer.

[0041] The coating prepared by the present invention is easy to construct, has fast light-curing film formation, is widely used, can be directly or indirectly sprayed on various electronic products, and has good friction noise reduction effect, touch skin effect and stain resistance effect. DETAILED DESCRIPTION

[0042] The present invention will be described in detail below in conjunction with the embodiments.

[0043] It is understood that the acrylic resin A used in the present invention is preferably UA-1808 of JSD Fine Chemicals, which is a trifunctional silicone-modified UV-curable self-healing resin. The resin has noise reduction function, self-healing property, good flexibility, stain resistance, smooth feel and good adhesion.

[0044] The acrylic resin B is preferably EBECRYL 8296 of Allnex Chemical, which is a trifunctional aliphatic polyurethane acrylic resin with excellent noise reduction, elasticity and flexibility.

[0045] It is understood that the acrylic resin C used in the present invention is preferably SU-5001 produced by Rockt Chemical, which is a hexafunctional aliphatic polyurethane acrylic resin with excellent stain resistance, adhesion and hardness.

[0046] It is understood that the photoinitiator used in the present invention is preferably 1-hydroxycyclohexyl phenyl ketone with double bond chemical structure.

[0047] It can be understood that the dispersant used in the present invention is preferably BYK2008 produced by BYK Chemical.

[0048] It is understandable that the stain resistance agent used in the present invention is preferably DSP-3320 produced by JSTAR Fine Chemicals.

[0049] It is understandable that the polyethylene wax slurry used in the present invention is preferably FA-341 produced by Gifu Chemical, which has good anti-floating properties and can solve the problem of spraying blooming due to high molecular weight of the resin.

[0050] It can be understood that the scratch-resistant leveling agent used in the present invention is preferably APU-25 of Jiuwei Chemical, which has excellent stain resistance and leveling properties, can reduce surface tension, and has a good lubrication effect.

[0051] It is understandable that the silica matting agent used in the present invention is preferably E-1011 produced by Tosoh Chemical, which has a small particle size, good lubricity and good matting properties.

[0052] It is understandable that the polytetrafluoroethylene wax used in the present invention is preferably KTL-2N produced by Shanghai Yile Chemical. The polytetrafluoroethylene wax has a noise reduction function, a small particle size, and a good silky feel, which can improve the silky feel of the coating and reduce friction.

[0053] The present invention will be further described below in conjunction with the embodiments.

[0054] Example 1

[0055] A noise reduction ultraviolet light curing coating, comprising a coating main agent and a composite diluent;

[0056] The coating main agent comprises the following raw materials in parts by weight:

[0057] 12 parts of acrylic resin A, 10.5 parts of acrylic resin B, 15 parts of acrylic resin C, 1.7 parts of photoinitiator, 13 parts of polyethylene wax slurry, 2 parts of polytetrafluoroethylene wax powder, 0.5 parts of dispersant, 3.0 parts of stain resistance additive, 2 parts of anti-scratch leveling agent, 6.3 parts of silica matting agent, 34 parts of composite diluent I.

[0058] Among them, acrylic resin A is UA-1808 from Jisida Fine Chemicals; acrylic resin B is EBECRYL 8296 from Zhanxin Chemicals; acrylic resin C is SU-5001 from Rockt Chemicals; photoinitiator is 1-hydroxycyclohexyl phenyl ketone from Double Bond Chemicals; polyethylene wax slurry is FA-341 from Gifu Chemicals; polytetrafluoroethylene wax powder is KTL-2N from Shanghai Yile Chemicals; dispersant is BYK2008 from BYK Chemicals; stain-resistant additive is DSP-3320 from Jisida Fine Chemicals; anti-scratch leveling agent is APU-25 from Jiuwei Chemicals; silica matting agent is E-1011 from Tosoh Chemicals; the components and proportions of composite diluent I are the same as those of the composite diluent.

[0059] The composite diluent is obtained by mixing 12 parts of ethylene glycol monobutyl ether, 50 parts of ethyl acetate, 15 parts of methyl isobutyl ketone, 15 parts of isopropanol and 8 parts of n-butanol. When used, the required number of parts is taken according to the needs.

[0060] The preparation method of the noise reduction ultraviolet light curing coating comprises the following steps:

[0061] (1) Preparation of composite diluent: 12 parts of ethylene glycol monobutyl ether, 50 parts of ethyl acetate, 15 parts of methyl isobutyl ketone, 15 parts of isopropanol and 8 parts of n-butanol are fully mixed to obtain a composite diluent; the composite diluent I used in the main part of the coating is the same as the composite diluent. When using, take the required number of parts according to the needs.

[0062] (2) 1.7 parts of photoinitiator and 10 parts of composite diluent I are fully mixed and dissolved until clear, and then 12 parts of acrylic resin A, 10.5 parts of acrylic resin B and 15 parts of acrylic resin C, 0.5 parts of dispersant, 3.0 parts of stain resistance additive, 2 parts of scratch resistance leveling agent, and 13 parts of polyethylene wax slurry are added. After being uniformly dispersed by stirring at medium speed, 6.3 parts of silica matting agent and 2 parts of polytetrafluoroethylene wax powder are added during stirring, and then dispersed at a high speed of 900 r / min for about 30 minutes until the fineness is qualified, and finally 24 parts of composite diluent I are added and adjusted to a qualified viscosity to obtain the main part of the coating;

[0063] (3) The coating main agent of step (2) and the composite diluent prepared in step (1) are mixed in a weight ratio of 100:120 to obtain the noise reduction violet light curing coating.

[0064] Example 2

[0065] A noise reduction ultraviolet light curing coating, comprising a coating main agent and a composite diluent;

[0066] The coating main agent comprises the following raw materials in parts by weight:

[0067] 17 parts of acrylic resin A, 13 parts of acrylic resin B and 7.5 parts of acrylic resin C, 1.7 parts of photoinitiator, 13 parts of polyethylene wax slurry, 2 parts of polytetrafluoroethylene wax powder, 0.5 parts of dispersant, 3.0 parts of stain resistance additive, 2 parts of anti-scratch leveling agent, 6.3 parts of silica matting agent, 34 parts of composite diluent I.

[0068] Among them, acrylic resin A is UA-1808 from Jisida Fine Chemicals; acrylic resin B is EBECRYL 8296 from Zhanxin Chemicals; acrylic resin C is SU-5001 from Rockt Chemicals; photoinitiator is 1-hydroxycyclohexyl phenyl ketone from Double Bond Chemicals; polyethylene wax slurry is FA-341 from Gifu Chemicals; polytetrafluoroethylene wax powder is KTL-2N from Shanghai Yile Chemicals; dispersant is BYK2008 from BYK Chemicals; stain-resistant additive is DSP-3320 from Jisida Fine Chemicals; anti-scratch leveling agent is APU-25 from Jiuwei Chemicals; silica matting agent is E-1011 from Tosoh Chemicals; the components and proportions of composite diluent I are the same as those of the composite diluent.

[0069] The composite diluent is obtained by mixing 12 parts of ethylene glycol monobutyl ether, 50 parts of ethyl acetate, 15 parts of methyl isobutyl ketone, 15 parts of isopropanol and 8 parts of n-butanol. When used, the required number of parts is taken according to the needs.

[0070] The preparation method of the noise reduction ultraviolet light curing coating comprises the following steps:

[0071] (1) Preparation of composite diluent: 12 parts of ethylene glycol monobutyl ether, 50 parts of ethyl acetate, 15 parts of methyl isobutyl ketone, 15 parts of isopropanol and 8 parts of n-butanol were fully mixed to obtain a composite diluent.

[0072] The composite thinner I used in the main part of the coating is the same as the composite thinner. When using it, just take the required number of portions according to the needs.

[0073] (2) 1.7 parts of photoinitiator and 10 parts of composite diluent I are fully mixed and dissolved until clear, and then 17 parts of acrylic resin A, 13 parts of acrylic resin B and 7.5 parts of acrylic resin C, 0.5 parts of dispersant, 3.0 parts of stain resistance additive, 2 parts of scratch resistance leveling agent, and 13 parts of polyethylene wax slurry are added. After being uniformly dispersed by stirring at medium speed, 6.3 parts of silica matting agent and 2 parts of polytetrafluoroethylene wax powder are added during stirring, and then dispersed at a high speed of 900 r / min for about 30 minutes until the fineness is qualified, and finally 24 parts of composite diluent I are added and adjusted to a qualified viscosity to obtain the coating body;

[0074] (3) The coating main agent of step (2) and the composite diluent prepared in step (1) are mixed in a weight ratio of 100:120 to obtain the noise reduction ultraviolet light curing coating.

[0075] Example 3

[0076] A noise reduction ultraviolet light curing coating, comprising a coating main agent and a composite diluent;

[0077] The coating main agent comprises the following raw materials in parts by weight:

[0078] 20 parts of acrylic resin A, 14.5 parts of acrylic resin B and 3 parts of acrylic resin C, 1.7 parts of photoinitiator, 13 parts of polyethylene wax slurry, 2 parts of polytetrafluoroethylene wax powder, 0.5 parts of dispersant, 3.0 parts of stain resistance additive, 2 parts of anti-scratch leveling agent, 6.3 parts of silica matting agent, 34 parts of composite diluent I.

[0079] Among them, acrylic resin A is UA-1808 from Jisida Fine Chemicals; acrylic resin B is EBECRYL 8296 from Zhanxin Chemicals; acrylic resin C is SU-5001 from Rockt Chemicals; photoinitiator is 1-hydroxycyclohexyl phenyl ketone from Double Bond Chemicals; polyethylene wax slurry is FA-341 from Gifu Chemicals; polytetrafluoroethylene wax powder is KTL-2N from Shanghai Yile Chemicals; dispersant is BYK2008 from BYK Chemicals; stain-resistant additive is DSP-3320 from Jisida Fine Chemicals; anti-scratch leveling agent is APU-25 from Jiuwei Chemicals; silica matting agent is E-1011 from Tosoh Chemicals; the components and proportions of composite diluent I are the same as those of the composite diluent.

[0080] The composite diluent is obtained by mixing 12 parts of ethylene glycol monobutyl ether, 50 parts of ethyl acetate, 15 parts of methyl isobutyl ketone, 15 parts of isopropanol and 8 parts of n-butanol. When used, the required number of parts is taken according to the needs.

[0081] The preparation method of the noise reduction ultraviolet light curing coating comprises the following steps:

[0082] (1) Preparation of composite diluent: 12 parts of ethylene glycol monobutyl ether, 50 parts of ethyl acetate, 15 parts of methyl isobutyl ketone, 15 parts of isopropanol and 8 parts of n-butanol were fully mixed to obtain a composite diluent.

[0083] The composite thinner I used in the main part of the coating is the same as the composite thinner. When using it, just take the required number of portions according to the needs.

[0084] (2) 1.7 parts of photoinitiator and 10 parts of composite diluent I are fully mixed and dissolved until clear, and then 20 parts of acrylic resin A, 14.5 parts of acrylic resin B and 3 parts of acrylic resin C, 0.5 parts of dispersant, 3.0 parts of stain resistance additive, 2 parts of scratch resistance leveling agent, and 13 parts of polyethylene wax slurry are added. After being uniformly dispersed by stirring at medium speed, 6.3 parts of silica matting agent and 2 parts of polytetrafluoroethylene wax powder are added during stirring, and then dispersed at a high speed of 900 r / min for about 30 minutes until the fineness is qualified, and finally 24 parts of composite diluent I are added and adjusted to a qualified viscosity to obtain the main part of the coating;

[0085] (3) The coating main agent of step (2) and the composite diluent prepared in step (1) are mixed in a weight ratio of 100:120 to obtain the noise reduction violet light curing coating.

[0086] Comparative Example 1

[0087] A noise reduction ultraviolet light curing coating, comprising a coating main agent and a composite diluent;

[0088] The coating main agent comprises the following raw materials in parts by weight:

[0089] 17 parts of acrylic resin (6071 from Changxing Chemical), 13 parts of acrylic resin (6123-100 from Changxing), 7.5 parts of acrylic resin C, 1.7 parts of photoinitiator, 13 parts of polyethylene wax slurry, 2 parts of polytetrafluoroethylene wax powder, 0.5 parts of dispersant, 3.0 parts of stain resistance additive, 2 parts of anti-scratch leveling agent, 6.3 parts of silica matting agent, and 34 parts of composite diluent I.

[0090] Among them, acrylic resin A is 6071 from Changxing Chemical; acrylic resin B is 6123-100 from Changxing; acrylic resin C is SU-5001 from Rockt Chemical; photoinitiator is 1-hydroxycyclohexyl phenyl ketone from Double Bond Chemical; polyethylene wax slurry is FA-341 from Gifu Chemical; polytetrafluoroethylene wax powder is KTL-2N from Shanghai Yile Chemical; dispersant is BYK2008 from BYK Chemical; stain-resistant additive is DSP-3320 from Jieshida Fine Chemical; anti-scratch leveling agent is APU-25 from Jiuwei Chemical; silica matting agent is E-1011 from Tosoh Chemical; the components and proportions of composite diluent I are the same as those of the composite diluent.

[0091] The composite diluent is obtained by mixing 12 parts of ethylene glycol monobutyl ether, 50 parts of ethyl acetate, 15 parts of methyl isobutyl ketone, 15 parts of isopropanol and 8 parts of n-butanol. When used, the required number of parts is taken according to the needs.

[0092] The preparation method of the noise reduction ultraviolet light curing coating comprises the following steps:

[0093] (1) Preparation of composite diluent: 12 parts of ethylene glycol monobutyl ether, 50 parts of ethyl acetate, 15 parts of methyl isobutyl ketone, 15 parts of isopropanol and 8 parts of n-butanol were fully mixed to obtain a composite diluent.

[0094] The composite thinner I used in the main part of the coating is the same as the composite thinner. When using it, just take the required number of portions according to the needs.

[0095] (2) 1.7 parts of photoinitiator and 10 parts of composite diluent I are fully mixed and dissolved until clear, and then 17 parts of acrylic resin (6071 of Changxing Chemical), 13 parts of acrylic resin (6123-100 of Changxing) and 7.5 parts of acrylic resin C, 0.5 parts of dispersant, 3.0 parts of stain resistance additive, 2 parts of anti-scratch leveling agent, and 13 parts of polyethylene wax slurry are added. After being uniformly dispersed by stirring at medium speed, 6.3 parts of silica matting agent and 2 parts of polytetrafluoroethylene wax powder are added during stirring, and then dispersed at a high speed of 900 r / min for about 30 minutes until the fineness is qualified, and finally 24 parts of composite diluent I are added and the viscosity is adjusted to a qualified level to obtain the coating body.

[0096] (3) The coating main agent of step (2) and the composite diluent prepared in step (1) are mixed in a weight ratio of 100:120 to obtain the noise reduction violet light curing coating.

[0097] Comparative Example 2

[0098] A UV curing coating comprises a coating main agent and a composite diluent;

[0099] The coating main agent comprises the following raw materials in parts by weight:

[0100] 17 parts of acrylic resin A, 13 parts of acrylic resin B and 7.5 parts of acrylic resin C, 1.7 parts of photoinitiator, 0 parts of polyethylene wax slurry, 2 parts of polytetrafluoroethylene wax powder, 0.5 parts of dispersant, 3.0 parts of stain resistance additive, 2 parts of anti-scratch leveling agent, 6.3 parts of silica matting agent, 53 parts of composite diluent I.

[0101] Among them, acrylic resin A is UA-1808 from Jisida Fine Chemicals; acrylic resin B is EBECRYL 8296 from Zhanxin Chemicals; acrylic resin C is SU-5001 from Rockt Chemicals; photoinitiator is 1-hydroxycyclohexyl phenyl ketone from Double Bond Chemicals; polyethylene wax slurry is FA-341 from Gifu Chemicals; polytetrafluoroethylene wax powder is KTL-2N from Shanghai Yile Chemicals; dispersant is BYK2008 from BYK Chemicals; stain-resistant additive is DSP-3320 from Jisida Fine Chemicals; anti-scratch leveling agent is APU-25 from Jiuwei Chemicals; silica matting agent is E-1011 from Tosoh Chemicals; the components and proportions of composite diluent I are the same as those of the composite diluent.

[0102] The composite diluent is obtained by mixing 12 parts of ethylene glycol monobutyl ether, 50 parts of ethyl acetate, 15 parts of methyl isobutyl ketone, 15 parts of isopropanol and 8 parts of n-butanol. When used, the required number of parts is taken according to the needs.

[0103] The preparation method of the noise reduction ultraviolet light curing coating comprises the following steps:

[0104] (1) Preparation of composite diluent: 12 parts of ethylene glycol monobutyl ether, 50 parts of ethyl acetate, 15 parts of methyl isobutyl ketone, 15 parts of isopropanol and 8 parts of n-butanol were fully mixed to obtain a composite diluent.

[0105] The composite thinner I used in the main part of the coating is the same as the composite thinner. When using it, just take the required number of portions according to the needs.

[0106] (2) 1.7 parts of photoinitiator and 10 parts of composite diluent I are fully mixed and dissolved until clear, and then 17 parts of acrylic resin A, 13 parts of acrylic resin B and 7.5 parts of acrylic resin C, 0.5 parts of dispersant, 3.0 parts of stain resistance aid, 2 parts of anti-scratch leveling agent, and 0 parts of polyethylene wax slurry are added. After being uniformly dispersed by stirring at medium speed, 6.3 parts of silica matting agent and 2 parts of polytetrafluoroethylene wax powder are added during stirring, and then dispersed at a high speed of 900 r / min for about 30 minutes until the fineness is qualified, and finally 43 parts of composite diluent I are added and adjusted to a qualified viscosity to obtain the main part of the coating;

[0107] (3) The main agent of the coating and the composite diluent are mixed in a weight ratio of 100:120 to obtain the noise reduction violet light curing coating.

[0108] Comparative Example 3

[0109] A UV curing coating comprises a coating main agent and a composite diluent;

[0110] The coating main agent comprises the following raw materials in parts by weight:

[0111] 17 parts of acrylic resin A, 13 parts of acrylic resin B and 7.5 parts of acrylic resin C, 1.7 parts of photoinitiator, 13 parts of polyethylene wax slurry, 0 parts of polytetrafluoroethylene wax powder, 0.5 parts of dispersant, 3.0 parts of stain resistance additive, 2 parts of anti-scratch leveling agent, 6.3 parts of silica matting agent, 36 parts of composite diluent I.

[0112] Among them, acrylic resin A is UA-1808 from Jisida Fine Chemicals; acrylic resin B is EBECRYL 8296 from Zhanxin Chemicals; acrylic resin C is SU-5001 from Rockt Chemicals; photoinitiator is 1-hydroxycyclohexyl phenyl ketone from Double Bond Chemicals; polyethylene wax slurry is FA-341 from Gifu Chemicals; polytetrafluoroethylene wax powder is KTL-2N from Shanghai Yile Chemicals; dispersant is BYK2008 from BYK Chemicals; stain-resistant additive is DSP-3320 from Jisida Fine Chemicals; anti-scratch leveling agent is APU-25 from Jiuwei Chemicals; silica matting agent is E-1011 from Tosoh Chemicals; the components and proportions of composite diluent I are the same as those of the composite diluent.

[0113] The composite diluent is obtained by mixing 12 parts of ethylene glycol monobutyl ether, 50 parts of ethyl acetate, 15 parts of methyl isobutyl ketone, 15 parts of isopropanol and 8 parts of n-butanol. When used, the required number of parts is taken according to the needs.

[0114] The preparation method of the noise reduction ultraviolet light curing coating comprises the following steps:

[0115] (1) Preparation of composite diluent: 12 parts of ethylene glycol monobutyl ether, 50 parts of ethyl acetate, 15 parts of methyl isobutyl ketone, 15 parts of isopropanol and 8 parts of n-butanol were fully mixed to obtain a composite diluent.

[0116] The composite thinner I used in the main part of the coating is the same as the composite thinner. When using it, just take the required number of portions according to the needs.

[0117] (2) 1.7 parts of photoinitiator and 10 parts of composite diluent I are fully mixed and dissolved until clear, and then 17 parts of acrylic resin A, 13 parts of acrylic resin B and 7.5 parts of acrylic resin C, 0.5 parts of dispersant, 3.0 parts of stain resistance additive, 2 parts of scratch resistance leveling agent, and 13 parts of polyethylene wax slurry are added. After being uniformly dispersed by stirring at medium speed, 6.3 parts of silica matting agent and 0 parts of polytetrafluoroethylene wax powder are added during stirring, and then dispersed at a high speed of 900 r / min for about 30 minutes until the fineness is qualified, and finally 26 parts of composite diluent I are added and adjusted to a qualified viscosity to obtain the coating body;

[0118] (3) The coating main agent of step (2) and the composite diluent of step (1) are mixed in a weight ratio of 100:120 to obtain the noise reduction violet light curing coating.

[0119] Application Examples

[0120] A 1.1-caliber pneumatic spray gun was used with an air pressure of 0.3 MPa to spray the light-curing coatings obtained in the embodiment and the comparative example on a PC sheet with a film thickness of 20 μm. The coatings were then baked at 60°C for 7 min and then heated under UVA energy of 900 mj / cm 2 The coatings were cured to obtain coatings corresponding to the coatings in the embodiments and comparative examples.

[0121] The performance of each coating corresponding to the coating prepared in the embodiment and the comparative example was tested, wherein the friction noise level was tested by rubbing two products of the same embodiment against each other, and the evaluation method was: level 5-extremely small friction sound, 4-small friction sound, 3-small friction sound, acceptable, 2-slightly large friction sound, 1-large friction sound. The adhesion on PC was tested by the hundred-grid test method. RCA wear resistance was tested by an RCA wear machine. The bending test was tested using a bending device. The appearance was tested visually. The stain resistance test was performed using a contact angle tester. The test results are shown in Table 1.

[0122] Table 1 Performance tests of embodiments and comparative examples

[0123]

[0124]

[0125] It can be seen from Table 1 that, in Comparative Examples 1-3, resin A, resin B and polytetrafluoroethylene wax bring excellent noise reduction effects. Different addition amounts have different hardness, RCA resistance, feel and elasticity. Comparing the examples with comparative example 1, it can be seen that compared with other common resins, the paint films obtained by acrylic resins A and B in the formula have lower friction noise, better feel, better elasticity and higher water drop angle; the comparative example and comparative example 2 show that the paint film obtained by adding polyethylene wax slurry to the formula has a better appearance on a dark background; the comparative example and comparative example 3 show that the paint film obtained by adding polytetrafluoroethylene wax powder to the formula of the embodiment has a better silky feel.

[0126] The noise reduction ultraviolet light curing coating of the present invention has a good mute effect, which can give people a quiet, comfortable and high-quality life experience; the coating also has a soft skin feel, which can give people a silky feeling like baby skin when touched; in addition, the product is an ultraviolet light curing coating, which has the characteristics of easy spraying and instant curing, and is convenient and efficient in production; the product has excellent performance, and also has good adhesion, chemical resistance, flexibility, stain resistance, etc., and is the only choice for noise reduction and feel of high-end electronic products.

[0127] The above is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments. It is understood that other improvements and changes directly derived or associated by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included in the protection scope of the present invention.

Claims

1. A noise-reducing ultraviolet light-curing coating, characterized in that: The noise reduction ultraviolet curing coating comprises a coating main agent and a composite diluent; The coating main agent comprises the following raw materials in parts by weight: 15-20 parts of acrylic resin A; 10-15 parts of acrylic resin B; 5-15 parts of acrylic resin C; 1.2-2,2 parts of photoinitiator, 10-16 parts of polyethylene wax slurry; 1-3 parts of polytetrafluoroethylene wax powder; The composite diluent includes at least two of ethylene glycol monobutyl ether, ethyl acetate, methyl isobutyl ketone, isopropanol, and n-butanol; The acrylic resin A is a trifunctional aliphatic polyurethane acrylate; And / or, the acrylic resin B is a silicone-modified UV-curable self-healing resin; And / or, the acrylic resin C is a hexafunctional, stain-resistant aliphatic polyurethane acrylate; And / or, the mass ratio of the coating main agent to the composite diluent is 100:100-150.

2. The noise reduction UV curing coating according to claim 1, characterized in that: In the coating main agent, the acrylic resin A includes UA-1808 of JESTA Fine Chemicals; And / or, the acrylic resin B comprises EBECRYL 8296 of allnex Chemical; And / or, the acrylic resin C includes SU-5001 of Rockt Chemical.

3. The noise reduction UV curing coating according to claim 1, characterized in that: The photoinitiator includes 1-hydroxycyclohexyl phenyl ketone of double bond chemical industry; And / or, the polyethylene wax slurry includes FA-341 of Gifu Chemical; And / or, the polytetrafluoroethylene wax powder includes KTL-2N produced by Shanghai Yile Chemical.

4. The noise reduction UV curing coating according to claim 1, characterized in that: The composite diluent is obtained by mixing 10-15 parts of ethylene glycol monobutyl ether, 45-55 parts of ethyl acetate, 13-18 parts of methyl isobutyl ketone, 13-18 parts of isopropyl ketone and 5-10 parts of n-butanol.

5. The noise reduction UV curing coating according to claim 1, characterized in that: The coating main agent also includes 0.5 parts of dispersant; 3.0 parts of anti-fouling agent; 2 parts of anti-scratch leveling agent; 6.3 parts of matting agent; and 30-35 parts of composite diluent I.

6. The noise reduction UV curing coating according to claim 5, characterized in that: The dispersant includes BYK2008 from BYK Chemical; The anti-fouling agent includes DSP-3320 of JST Fine Chemicals; The anti-scratch leveling agent includes APU-25 of Jiuwei Chemical; The matting agent includes a silicon dioxide matting agent; The raw materials and proportions contained in the composite diluent I are the same as those of the composite diluent.

7. The noise reduction UV curing coating according to claim 5, characterized in that: The matting agent includes E-1011 of Tosoh Chemical; The composite diluent I is prepared by mixing 10-15 parts of ethylene glycol monobutyl ether, 45-55 parts of ethyl acetate, 13-18 parts of methyl isobutyl ketone, 13-18 parts of isopropyl ketone and 5-10 parts of n-butanol.

8. A method for preparing the noise reduction UV curing coating according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: by weight, S1: preparing a composite diluent: thoroughly mixing 10-15 parts of ethylene glycol monobutyl ether, 45-55 parts of ethyl acetate, 13-18 parts of methyl isobutyl ketone, 13-18 parts of isopropanol and 5-10 parts of n-butanol to obtain a composite diluent; The components, proportions and preparation methods of the composite diluent I are the same as those of the composite diluent; S2: 1.7 parts of photoinitiator and 10 parts of composite diluent I are fully mixed and dissolved until clear, and then 15-20 parts of acrylic resin A, 10-15 parts of acrylic resin B and 5-15 parts of acrylic resin C, 0.5 parts of dispersant, 3.0 parts of stain resistance additive, 2 parts of scratch resistance leveling agent, 13 parts of polyethylene wax slurry are added, and after stirring and dispersing evenly, 6.3 parts of silicon dioxide matting agent and 2 parts of polytetrafluoroethylene wax powder are added while stirring, and then dispersed and stirred at 800-1000r / min for 30min until the fineness is qualified, and finally 20-25 parts of composite diluent I are added, and the viscosity is adjusted to 30-35s. When the viscosity is qualified, the coating main agent is obtained; S3: Mixing the coating main agent of step S2 with the composite diluent prepared in step S1 to obtain the noise reduction violet light curing coating.

9. The preparation method according to claim 8, characterized in that: In step S3, the mass ratio of the coating main agent to the composite diluent is 100:100-150.

10. An application of the noise reduction UV-curable coating according to any one of claims 1 to 7 or the noise reduction UV-curable coating prepared by the preparation method according to any one of claims 8 to 9, characterized in that: Used to form a film layer on the workpiece; The specific application method is: coating the noise reduction ultraviolet curing coating on the surface of the workpiece, and curing after baking to obtain a workpiece containing the coating; The baking temperature is 55-65°C and the baking time is 6-7 minutes; The curing is UVA curing with an energy of 800-1000mj / cm 2 ; The coating has a thickness of 15-25 μm.

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