JPS63142039A - Coating composition and resin molded article having excellent scratch resistance and processing property obtained by coating said composition - Google Patents

Abstract

PURPOSE:To obtain the titled composition capable of forming a coating film having excellent scratch resistance, flexibility, etc., curable with active energy rays, by blending a monomer component comprising a reaction product obtained from pentaerythritol tri(meth)acrylate, etc., with an organic solvent, etc. CONSTITUTION:(A) 100pts.wt. monomer component consisting of A1: 9.9-90wt% reaction product of pentaerythritol tri(meth)acrylate and a diisocyanate compound, A2: 9.9-90wt% bifunctional monomer shown by formula I (R1 and R2 are H, etc.; k, l, m and n are 0 or 1-5; k+l=1-5; m+n=0 or 1-5), A3: 0.1-10wt% phosphate group-containing (meth)acrylate shown by formula II (R3 and R4 are H, etc.; q is 1-6) and A4: 0-30wt% nonvolatile polymerizable monomer except the component A1-A3) is blended with (B) 10-900pts.wt. organic solvent and (C) 0-10pts.wt. photopolymerization initiator to give a composition, which is applied to a resin molded article.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is easily cured even in an air atmosphere by irradiation with active energy rays, exhibits both remarkable scratch resistance and flexibility, and has excellent heat resistance and Coating composition capable of forming a cross-coating film with excellent solvent resistance, antistatic property, weather resistance, and adhesion to various substrates - 2, and rubbing temperature resistance obtained by coating the same,
Concerning resin molded products with excellent workability. .

(Prior Art) In general, resin molded products are used in a wide range of fields because they have many advantages such as being lightweight and highly resistant to scratches, as well as being inexpensive and easy to mold. Its surface hardness is lower than that of metal and glass, making it difficult to store and transport.

During use, it has the disadvantage that the surface is easily scratched by contact with other items. Particularly in products that require transparency and good visibility, scratches on the surface of resin molded products can significantly reduce their value and make them unusable, so it is necessary to improve the surface's one-needle warming properties. This is strongly required. Various studies have been made in the past to improve these drawbacks.

For example, there are methods of applying organic coating materials such as melamine resin or inorganic coating materials such as organopolysiloxane resin and curing them with heat, but both methods have problems with workability, and organic coating materials Scratch resistance was only 7υ, and inorganic coating materials had drawbacks such as poor adhesion and the need for primer treatment. On the other hand, the method of applying a polyfunctional (meth)acrylate monomer to the surface of a resin molded product and irradiating it with active energy rays to form a cured film has excellent productivity and has excellent scratch resistance. Because of its excellent adhesion, a lot of research has been done, and some of it has even been put into practical use.

However, as the applications of resin molded products have become more diverse in recent years,
There are an increasing number of applications where flexibility as well as abrasion resistance is important to the coating. Particularly in the case of thin plate molded products, workability such as punching and heat bending is required.
With the K-forming method, it is extremely difficult to obtain a coating that has both excellent scratch resistance and flexibility, and at present no coating material that is satisfactory for this purpose has yet been obtained.

(Problem to be solved by A Ming) The present inventors have conducted extensive research and have found that a coating composition containing specific components in specific proportions can be created easily even in an air atmosphere using active energy rays. hardens to provide outstanding scratch resistance and flexibility, as well as heat resistance, solvent resistance,
In addition to forming a film with excellent antistatic properties, weather resistance, and adhesion to various substrates, the composition for the film can also be applied to resin moldings.
! It was discovered that a resin molded product with excellent scratch resistance and workability could be obtained even though the material was completely destroyed, and the present invention was completed.

(Means and effects for solving the problems) That is, the present invention provides a reaction product (a) of pentaerythritol tri(meth)acrylate and a diisocyanoformate.
9 to 90 points Riddle Q, the following general formula (I) Agony Q (wherein, R4 and R2 each represent hydrogen or methyl groups, which may be the same or different, and k, t, m, and n are O
or an integer from 1 to 5, and +t is 0 or 1 to 5,
m+n is 0 or an integer from 1 to 5. ) 9.9 to 90 bifunctional monomers (in the general Niyama) shown below (in the formula, R5 is hydrogen or a methyl group, R4 is hydrogen, a methyl group, or a halodanated methyl group) , q is an integer of 1 to 6) phosphoric acid group-containing (meth)acrylates 19001-10 times, t, and the above reaction product (a), bifunctional monomer (rJ) and phosphate group-containing (
meth)acrylate (with respect to other substantially non-volatile polymerizable monomers excluding Nowo) 0 to 30 weights 12 (however, (in+(
C1+ (to Z+) is 100% by weight. ), 100 parts by weight of a monomer component (A), an organic solvent capable of dissolving the monomer component (A) (10 to 900 parts by weight), and a photopolymerization initiator (50 to 10 parts by weight of active energy). A coating composition that can be cured by wire to form a film with excellent scratch resistance and AJ flexibility, and a resin molding coated with the coating composition that has excellent scratch resistance and processability. This relates to resin molded products.

Pentaerythritol tri(
The reaction product (a) (hereinafter referred to as the reaction product (→)) of meth)acrylate and diisocyanate compound has extremely good reactivity even in an air atmosphere when irradiated with active energy rays. The cured film has excellent scratch resistance and relatively good flexibility.Pentaerythritol tri(meth)acrylate is usually commercially available as a mixture with tetra(meth)acrylate, but especially when isolated The diisocyanate compound may be used as a mixture, for example, hexamethylene diisocyanate, inholo/diisocyanate, xylylene diisocyanate, tolylene diisocyanate, diphenylmethanoisocyanate, etc. In terms of weather resistance and other properties of the coating film, aliphatic or alicyclic diisocyanate compounds are preferred.The amount of diisocyanate used is determined by the -NCo10H equivalent ratio to the remaining OH groups of pentaerythritol tri(meth)acrylate. ga o,
i to 1.0, preferably 0.2 to 0.8.

If it is smaller than 0.1, the flexibility is insufficient.1, 1.0
If it is larger, the adhesion of the coating film will deteriorate, which is not preferable. The diisocyanate compound reacts with the OH group contained in R-metaerythritol tri(meth)acrylate to form a urethane bond, but by forming a specific proportion of the reaction product, it provides excellent curability in an air atmosphere. Also, the cured film has favorable effects such as scratch resistance, flexibility, adhesion to the substrate, and surface smoothness. The reaction product ((a) is monomer component (A) 10
9.9 to 90% by weight, preferably 33 to 90% by weight
It is used in a range of 70% by weight. If the amount used is less than 9.9% by weight, excellent curing properties and sufficient scratch resistance in an air atmosphere will not be obtained, and if it exceeds 90% by weight, flexibility will be insufficient. .

Bifunctional monomer (hereinafter referred to as bifunctional monomer (b)) represented by the general formula (ri) used in the present invention.
improves the flexibility of the cured film without reducing its scratch resistance, and also does not impair its curability when irradiated with active energy rays. In the general formula (I), if the numbers of k+t and m+n exceed 5, the scratch resistance, adhesion, and resistance of the cured film will deteriorate, which is not preferable. Preferably, the numbers of +t and m+n are 2 or less. Specific examples of the bifunctional monomer (b) include 2,2-bis(4-acryloxyphenyl)chlorine, 2,2-bis(4-methacryloxyphenyl)propane, 2, 2-bis(4 acryloxyethoxyphenyl) 7” o /4
2,2-bis(4methacryloxyethoxyphenyl)sol, 2-(4acryloxysoethoxyphenyl)-8'-(4acryloxyethoxyphenyl)propane, 2,2-bis (4-acryloxydiethoxyphenyl) Prono J? 2,2-bis(4-methacryloxyglopoxyphenyl)fo-pan, 2,2-bis(4-methacryloxyglopoxyphenyl)delonone, 2,2-bis(4-methacryloxy!-I?xyphenyl) ) Pro9,2,2-bis(4acryloxyethoxyglo?xyphenyl) 7' o-! 2,2-bis(4methacryloxyethoxyglopoxyphenyl)propane, etc., and these 11. ii or a mixture of two or more can be used. The amount of the difunctional monomer (b) used is within the range of monomer component (A). If the amount used is less than 9.9 monomer, sufficient flexibility cannot be obtained,
If it exceeds 90% by weight and t1t%, the curing properties in an air atmosphere and II scratch resistance will be insufficient.

The phosphoric acid group-containing (meth)acrylate 1 (hereinafter referred to as phosphoric acid group-containing (meth)acrylate) represented by the general formula (TI) used in the present invention significantly improves the scratch resistance of the cured film. and also exhibits 11Y antistatic properties.Specific examples of the phosphate group-containing (meth)acrylate (c) include acid phosphoxyethyl (meth)acrylate, acid phosphoxyclovir (meth)acrylate, etc. , acid phosphoxylatyl (meth)acrylate, 3-chloro-2-acid phosphoxyclovir (meth)acrylate, etc., and one or a mixture of two or more of these can be used.Phosphate group-containing The amount of (meth)acrylate (c) used is 0.1 to 10% by weight based on 100% by weight of monomer components,
Preferably it is in the range of 1 to 5% by weight.

0.1 If the amount used is less than 4% by weight, sufficient scratch resistance and prevention properties will not be obtained for the band, and if it exceeds 10% by weight, an improvement in scratch resistance commensurate with the amount used cannot be expected. On the contrary, the curing properties in an air atmosphere become insufficient.

The monomer component (A) in the present invention is a reaction product (■, 2
It comprises a functional monomer (b) and a phosphoric acid group-containing (meth)acrylate (c) in the above amounts, respectively,
Only when these three components are inseparable from each other can a coating composition be obtained which is curable even in an air environment and which provides a cured film with excellent scratch resistance and flexibility.

In the present invention, the monomer component (4) may be composed of the above-mentioned reaction product (a), a bifunctional monomer (b), and a phosphoric acid group-containing (meth)acrylate (c). , if necessary, the above-mentioned reaction product (a), bifunctional monomer (b) and phosphoric acid group-containing (
Substantially non-volatile polymerizable monomers (excluding meth)acrylate (c)) (hereinafter referred to as polymerizable monomers). ) can be used in combination. Here, "substantially non-volatile" means that it remains in the film as a film-forming component when the coating composition is applied and the organic solvent (B) is volatilized.

Polymerizable monomers that can be used include, for example, vinyl compounds such as N-vinylpyrrolidone, vinylpyridine, and zopinylbenzene; allyl compounds such as noaryl phthalate, triallyl isocyanurate, and trimethylolchloro-and-noallyl ether; - Maleimide compounds such as butylmaleimide and cyclohexylfraimide, methoxyethyl (meth)acrylate, ethoxydiethylene glycol (meth)acrylate, phenoxyethyl (meth)acrylate, hydroxyethyl (meth)acrylate,
1. (Meth)acrylates such as 4-butanediol di(meth)acrylate, diethylene glycol di(meth)acrylate), tripropylene glycol di(meth)acrylate, trimethylolguro-9-tri(meth)acrylate, etc. can be used, and one or a mixture of two or more of these can be used. The amount of polymerizable monomer) used is O to 30% by weight based on 100% by weight of monomer component color).
Preferably it is in the range of 0 to 20% by weight. Usage amount is 30
If the amount exceeds % by weight, a coating composition having excellent scratch resistance and flexibility cannot be obtained.

Examples of the organic solvent (B) that can dissolve the monomer component (A) used in the present invention (hereinafter referred to as organic solvent (B)) include ethanol, inglono-4-nol, noryalbutanol, and isobutanol. Alcohols such as;
Aromatic hydrocarbons such as benzene, toluene, and xylene; Esters such as ethyl acetate, butyl acetate, amyl acetate, and ethyl lactate; Ketones such as acetone, methyl ethyl ketone, methyl imbutyl ketone, and diacetone alcohol; Methyl cellosolve, ethyl Examples include ethers such as cellosolve and methyl cellosolve, and one type or a mixture of two or more of these can be used.

In addition, polymerizable monomers such as methyl acrylate, butyl acrylate, methyl methacrylate, styrene, and vinyl acetate can also be used as organic solvents (as long as they have the same effect as organic solvents). An organic solvent (the average is used to further improve the coating workability of the coating composition and the adhesion of the cured film to the substrate, and the above-mentioned monomer component (A) 100? It is used in an amount of 10 to 900 parts by weight, preferably 40 to 300 parts by weight per part i.If the amount of organic solvent (B) used is less than 10 parts by weight, 4 parts may be used in terms of coating workability. If the amount exceeds 900 parts by weight, it becomes difficult to control the coating thickness and the smoothness of the resulting coating is also reduced, which is not preferable. In addition, when using the organic solvent (B), the type and amount may be selected appropriately depending on the coating method, etc. However, depending on the type of resin used as the base material, devitrification and cracks may occur. This may occur, so care must be taken when making this selection.

In the present invention, K needs to be irradiated with active energy rays such as ultraviolet rays, electron beams, and radiation in order to apply the coating composition to the surface of the resin molded article and form a cured film. Among these, the method of irradiating with ultraviolet rays is the most practical method because the equipment is simple and other reasons.

Since K is cured by irradiation with ultraviolet rays, it is necessary to add a photopolymerization initiator (q) that can initiate a polymerization reaction by irradiation with ultraviolet rays.
Examples of q include benzoin ethers such as benzoin ethyl ether and benzoin isobutyl ether;
Examples include indyl ketals such as dimethoxyphenylacetophenone and hydroxycyclohexylphenyl ketone; acetophenones such as jetoxyacetophenone; ketones such as benzophenone, -ri/zyl, and 2-chlorothioxanthone; These photopolymerization initiators (the amount of q used is 0 to 10 parts by weight, preferably 0.1 parts by weight, based on 100 parts by weight of monomer component (A) -6 parts by weight.If the amount of the photopolymerization initiator (Q) exceeds 10 parts by weight, it is not preferable because the scratch resistance and weather resistance of the cane film will deteriorate.

The class reversal composition of the present invention is composed of a monomer component, an organic solvent (dispersion), and a photopolymerization initiator (C) in the above-mentioned amounts, and if necessary, a known ultraviolet ray. Additives such as absorbers, antioxidants, plasticizers, ring agents, antifoaming agents, antistatic agents, organic or inorganic fillers, and colorants can be added.

The resin molded article of the present invention having excellent scratch resistance and processability is obtained by applying the coating composition to the surface of various resin moldings and curing it with active energy rays. Applicable resin molded products include molded products of various resins, regardless of whether they are thermoplastic resins or thermosetting resins, such as polymethyl methacrylate resin, polystyrene resin, acrylonitrile-styrene resin, ABS resin, polycarbonate resin, etc. Realyl diglycol carbonate resin, hard vinyl chloride resin, cellulose acetate resin, cellulose acetate butyrate xJRnV
t, sheet-like molded products, film-like molded products, rod-like molded products manufactured from nylon resin, polyacetal resin, polyester resin, unsaturated polyester resin, etc., or composite molded products of the above resins and other organic or inorganic materials. etc. can be mentioned. Among these molded products, resin molded products such as polymethyl methacrylate resin and polycarbonate resin have excellent optical properties, U impact resistance, heat resistance,
This is particularly preferable because there is a strong demand for a substitute for applications in which glass has traditionally been used due to its properties such as weather resistance, and there is also a strong demand for improved scratch resistance. These various resin moldings may be coated with the coating composition as they are, but if necessary, pretreatment such as corona discharge, glow discharge, ozone oxidation, hydrolysis, coating with an adhesive layer, printing, etc. Resin moldings treated with can also be used.

Also, the methods for applying the coating composition to the resin molded article include brush coating 1, dip coating 1, and roll coating. Conventional methods such as J1 coating, Ssolley coating, and flow coating can be employed as appropriate.

As for the coating amount, the thickness of the cured coating film is 1) 95 to 15 μm.

Preferably, it is necessary to adjust it to a range of 1 to 10μ. 0
．． If it is thinner than 5μ, the scratch resistance will be poor1, and if it exceeds 15μ, internal distortion will increase, resulting in a cured film with poor readability, resulting in a decrease in the workability of resin molded products. So I don't like it.

(Effects of the Invention) The coating composition of the present invention is easily cured by irradiation with active energy rays, has excellent scratch resistance and flexibility, and has heat resistance, solvent resistance, antistatic property, Forms a crosslinked film with excellent weather resistance and adhesion to various substrates. Therefore, the resin molded products of the present invention, which are obtained by coating and curing various resin molded products with the summer cypress acid, have excellent scratch resistance and workability, and are also excellent in durability. ,window,
Covers for lenses, watches and instruments, Teru G! Cover of A appliance,
It can be suitably used for applications such as windshields.

(Examples) Hereinafter, embodiments of the present invention will be explained in detail using Examples, but the present invention is not limited to the following Examples. In addition, evaluation in Examples was performed by the following method.

(I) Scratch resistance: Using a wear resistance tester (Yasuda Seiki Seisakusho (Yanagi)), φooo steel cool under 500g load
The haze value of the surface of the test piece after 0.00 reciprocation was measured using a haze meter (Nippon Denshoku Kogyo (Ten) NPH-100IDP).
It was measured with

◎ Haze value Less than 0.5 0 0.5 or more and less than 2 Δ 2 or more and less than 20 A test piece cut into a strip with a length of 15 mm and a width of 5 mm was wrapped around the outer circumference of a circle with a diameter of 33 mm to observe the state of the coating.

Of4 Always Δ Slight cracks occurred
After cutting loXIO squares at intervals and pressing a polyester adhesive tape on the tape, it was peeled off and the remaining rate of the cured film was observed.

Δ 51/100 to 99/1o.

X O/100 to 50/100 (4) Heat resistance: The state of the film after heat treatment by keeping it in a hot air dryer for 500 hours was comprehensively evaluated from the viewpoint of appearance, scratch resistance, readability, and adhesion.

Polycargenate resin molded plate: 120°C polymethyl methacrylate 1 to fat molded plate: 10 (I0 There was almost no change from the coating before heat treatment.

× There was a significant change compared to the film before heat treatment.

(5) Cigarette ash adhesion test ○ After rubbing the surface of the 4 cured specimens with a cotton cloth 20 times in R1, the ash was brought close to about 1 inch from a new cigarette ash and there was no ash adhering at all.

Δ Slight adhesion due to the same operation as above.

× It adheres noticeably in the same work as above.

(6) Surface = 1 Resistivity - The surface specific resistivity of a 40×40 m test piece was measured using a surface resistance measuring device (Toa'I!Nami Kogyo Co., Ltd., Ho 5M-11). Temperature 20°C Humidity 60% Reference Example 1 Pentaerythritol 500
g, acrylic acid 875. hp-toluenesulfonic acid 70
g, hydroquinone 0.175 g and n-hexane 5
Add 30g and 1.5t of air! /hr was bubbled into the reaction mixture while heating and stirring, and the water produced by the reaction was drained out of the reaction system.

After 6 hours of reaction, the reaction mixture was cooled to room temperature.

Of the two separated layers, the n-hexane layer was removed, and the ester layer was diluted with trichlorethylene to a concentration of about 50%. Next, it was neutralized with a 5% sodium hydroxide aqueous solution containing 10% sodium chloride, and then 0.5% sodium hydroxide aqueous solution 600+ containing 10% sodium chloride.
+/and successive washing with 600 d of 5% aqueous sodium chloride solution. The ester solution containing the solvent was prepared under reduced pressure (ultimate vacuum degree 5).
(Hg), and the medium was distilled off at 50°C. The ester yield was 900g, and its composition (according to gas chromatography)
The viscosity (B-type viscometer) was 700 cps and 725°C.

Reference Example 2 Pentaerythritol triacrylate) 314.9 (OHmil, Omole) obtained in Reference Example 1 was placed in a four-loaf flask equipped with a stirrer, a thermometer, a dropping funnel, and a gas blowing tube.
) and 0.429 dibutyltin dilaurate were added and stirred while blowing in a small amount of dry air.

Next, hexamethylene diisocyanate 42j! (N.C.
O groups (N2O, 50 mole) were added from the dropping funnel over a period of 1 hour. After addition, further 80°C for 2 hours at 40-50'C.
Raise the temperature to ℃ and react for 7 hours, then take out the sample,
A clear liquid reaction product with a viscosity of 4850 cps/25° C. was obtained.

Examples 1 to 3, Comparative Examples 1 to 5 Using the reaction product (I) obtained in Reference Example 2, a composition for nuclide was prepared according to the formulation shown in Table 1, and a polycarbonate with a thickness of 1 layer was prepared. It was applied to a resin molded plate (manufactured by Nippon Shokubai Kagaku Kogyo Co., Ltd. (Ten), Evocar♂) using a percoater so that the cured film had a thickness of 3 to 5 μm VC. After drying at 60°C for 3 minutes, it was applied from a distance of 10 mouths. Resin molded products with a cured film formed on the surface by irradiation with ultraviolet rays for 6 seconds were obtained.The performance of these resin molded products was as shown in Table 1.

Examples 4 to 5, Comparative Example 6 Using the reaction product (I) obtained in Reference Example 2, a coating composition was prepared according to the formulation shown in Table I, and a 1 m thick polymethyl methacrylate resin molded plate ( It was applied uniformly to Mitsubishi Rayon (manufactured by (Ten) Co., Ltd., Acrylite) using a percoater.

After evaporating the solvent in a hot air dryer at 60°C for 3 minutes, a high-pressure mercury lamp (Iwasaki Electric Co., Ltd. back, HO3-L31) was used.
) was irradiated with ultraviolet rays from a distance of 10 c1n for 12 seconds to obtain a resin molded product on which a cured film with a thickness of 3 to 4 μm was formed on the surface. The performance of these resin molded products was as shown in Table 3.

Table ■ As is clear from Tables ■ and ■, only when the composition satisfies the conditions of the coating composition of the present invention, the coating composition has excellent curability, and has good scratch resistance and processability. A resin molded product with the following properties was obtained.

Examples 6 to 9, Comparative Example 7 The coating composition used in Example 2 was coated uniformly on a 1 m thick polycargenate resin molded plate (manufactured by Nippon Shokubai Chemical Co., Ltd. (2), Epocar ♂) using a 9-coater. It was applied to. 60
After drying for 3 minutes at °C, 3k from a distance of 15cW1
Ultraviolet rays from a W high-pressure mercury lamp were irradiated for 10 seconds. The performance of the thus obtained molded articles having coatings with different thicknesses formed on their surfaces was as shown in Table 3.

Table 2 As is clear from Table m, when the film thickness becomes larger than 15 μm, the adhesion, flexibility, and heat resistance deteriorate.

ml DPHA dipentaerythritol hexaacrylate*2 A-Bi12 2,2-bis(4-acryloxyphenyl) f/4-in*3 1,4-BDDA 1,4-butanediol cyacrylate) k4 APgA acid phosphor Oxyethyl acrylate $5 PET-A
Phosphooxyethyl triacrylate *6 Organic solvent
Ethyl celerol: Isoglobil alcohol = 100:
50 mixed snout

Claims (1)

[Claims] 1. Reaction product of pentaerythritol tri(meth)acrylate and diisocyanate compound (a) 9.9-
90% by weight, the following general formula (I) ▲Mathematical formulas, chemical formulas, tables, etc.▼(I) (In the formula, R_1 and R_2 each represent hydrogen or methyl group, which may be the same or different, and k, l, m, n
is 0 or an integer from 1 to 5, and k+l is 0 or an integer from 1 to 5.
5. m+n is 0 or an integer from 1 to 5. ) Bifunctional monomer (b) 9.9 to 90% by weight,
The following general formula (II) ▲There are mathematical formulas, chemical formulas, tables, etc.▼ (II) (In the formula, R_3 represents hydrogen or a methyl group, R_4 represents hydrogen, a methyl group, or a halogenated methyl group, and q represents an Phosphate group-containing (meth)acrylate (c) 0
．． 1 to 10% by weight and substantially non-volatile polymerizable monomers excluding the reaction product (a), the bifunctional monomer (b), and the phosphoric acid group-containing (meth)acrylate (c) (d) 100 parts by weight of a monomer component (A) consisting of 0 to 30% by weight (however, (a) + (b) + (c) + (d) is 100% by weight); Organic solvent (B) capable of dissolving body component (A) 10
~900 parts by weight, and 0 to 10 parts by weight of a photopolymerization initiator (C), which is cured by active energy rays and has scratch resistance.
A coating composition capable of forming a film with excellent flexibility. 2. The amount of photopolymerization initiator (C) used is 1 of monomer component (A)
2. The coating composition according to claim 1, wherein the active energy ray is ultraviolet rays. 3. Reaction product of pentaerythritol tri(meth)acrylate and diisocyanate compound (a) 9.9~
90% by weight, ▲Mathematical formulas, chemical formulas, tables, etc.▼(I) (In the formula, R_1 and R_2 each represent hydrogen or methyl group, which may be the same or different, and k, l, m, n
is 0 or an integer from 1 to 5, and k+l is 0 or an integer from 1 to 5.
5. m+n is 0 or an integer from 1 to 5. ) Bifunctional monomer (b) 9.9 to 90% by weight,
The following general formula (II) ▲There are mathematical formulas, chemical formulas, tables, etc.▼ (II) (In the formula, R_3 represents hydrogen or a methyl group, R_4 represents hydrogen, a methyl group, or a halogenated methyl group, and q represents an Phosphate group-containing (meth)acrylate (c) 0
．． 1 to 10% by weight and substantially non-volatile polymerizable monomers excluding the reaction product (a), the bifunctional monomer (b), and the phosphoric acid group-containing (meth)acrylate (c) (d) 100 parts by weight of a monomer component (A) consisting of 0 to 30% by weight (however, (a) + (b) + (c) + (d) is 100% by weight); Organic solvent (B) 1 capable of dissolving polymer component (A)
A coating composition consisting of 0 to 900 parts by weight and 0 to 10 parts by weight of a photopolymerization initiator (C) is applied to a resin molding and cured with active energy rays. Resin molded product. 4. The amount of photopolymerization initiator (C) used is 1 of monomer component (A)
4. A resin molded article with excellent scratch resistance and processability according to claim 3, wherein the active energy ray is ultraviolet rays. 5. A resin molded article with excellent scratch resistance and processability according to claim 3 or 4, wherein the resin molded article is a molded article of polymethyl methacrylate resin or polycarbonate resin.