JPH03215529A - Coating composition for coating mold inner surface - Google Patents

Abstract

PURPOSE:To obtain a coated article with a high hardness and flaw resistance by compounding a thermoset resin with a filler having a specified Mohs hardness. CONSTITUTION:The title compsn. is prepd. by compounding 100 pts.wt. thermoset resin which can give a rigid coating film by forming a three-dimensional network structure by the cleavage and addition reaction of double bonds in the resin in the presence of a thermally decomposable radical catalyst (e.g. an unsatd. polyester resin), 50-300 pts.wt. filler with a Mohs hardness of 5 or higher (e.g. quartzite), and a copolymerizable monomer, an initiator, a curing accelerator, a pigment, etc., if required.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention conceals surface defects such as pores, microcracks, sink marks, and undulations in thermosetting plastic molded products, particularly fiber reinforced plastic (FRP) molded products. The present invention relates to a one-component mold inner coating composition.

(Prior Art) Parts molded from thermosetting materials have recently been widely used as an alternative to metal parts. In particular, sheet molding compounds (SM
C) or bulk molding combined (BMC)
) is very commonly used. However, S.M.C.
Alternatively, there are surface defects such as pores, microcracks, sink marks, and undulations on the surface of a molded product formed by heating and pressurizing BMC. When a molded product with such surface defects is painted using a normal method, the finish lacks smoothness and
It is not possible to obtain sufficient coating film performance.

As a method to hide such surface defects, there is a so-called in-mold coating method, in which SMC or BMC is sufficiently cured in a mold, and then a coating composition is injected and the coating is applied by heating and pressurizing again. Are known. As an in-mold coating composition suitable for the in-mold coating method, an in-mold coating composition comprising an epoxy modified resin and an inorganic filler is disclosed in JP-A-60-23443.

(Problem to be Solved by the Invention) However, when a film is formed on the surface of a molded product using this composition for coating inside a mold, the hardness of the film is low, so that articles etc. may come into contact with the film. The drawback was that the film was easily damaged.

The present invention solves the above-mentioned drawbacks, and its purpose is to provide an in-mold coating composition for producing highly hard and scratch-resistant coatings.

(Means for Solving the Problems) The in-mold coating composition of the present invention contains 50 to 300 parts of a filler having a Mohs hardness of 5 or more based on 100 parts by weight of a thermosetting resin.
Part by weight is contained, thereby achieving the above object.

The thermosetting resin used in the present invention can form a three-dimensional network structure by cleavage and addition reaction of double bonds in the resin by using a thermally decomposable radical catalyst to form a hard film. Resin can be used. Examples of such resins having reactive double bonds in their molecules include unsaturated polyester resins, vinyl ester resins such as epoxy acrylate, and urethane acrylate resins.

These resins may be used alone or in combination.

The unsaturated polyester resin mentioned above is a resin produced by a known method using an organic polyol and an aliphatic unsaturated polycarboxylic acid. If necessary, an aliphatic saturated polycarboxylic acid and/or an aromatic polycarboxylic acid may be further added. Here, organic polyols include diols, triols, tetrols, and mixtures thereof, but are mainly classified into aliphatic polyols and aromatic polyols. Aliphatic polyols include ethylene glycol, propylene glycol, dipropylene glycol, butylene glycol, triethylene glycol, neopentyl glycol, dipromneopentyl glycol, hexamethylene glycol, trimethylene glycol, trimethylolpropane, glycerin, bentaerythritol diallyl. Examples include ether.

Aromatic polyols include bisphenol A, hydrogenated bisphenol A, and bisphenol S; obtained by adding 1 to 20 aliphatic oxirane compounds such as ethylene oxide, propylene oxide, or butylene oxide to 31 molecules of bisphenol A or bisphenol. Examples include polyoxylene bisphenol A or polyoxylene bisphenol S.

As the aliphatic unsaturated carboxylic acid, maleic acid (anhydride), fumaric acid, itaconic acid (anhydride), etc. are used. Examples of aliphatic saturated carboxylic acids include cepatic acid, adipic acid,
(Anhydrous) succinic acid etc. are used. As the aromatic carboxylic acid, phthalic acid (anhydride), isophthalic acid, terephthalic acid, methyltetrahydrophthalic anhydride, endomethylenetetrahydrophthalic anhydride, etc. are used.

The above vinyl ester resin includes epoxy resin and (meth)
It is a resin produced by a known method with a monocarboxylic acid having a reactive double bond such as acrylic acid. Epoxy resins include bisphenol A type epoxy resins manufactured from epichlorohydrin and bisphenol A; brominated bisphenol A type epoxy resins manufactured from epichlorohydrin and brominated bisphenol A;
Novolac-type epoxy resin produced by glycidyl etherification of phenol novolac or ortho-cresol nopolac; tetraglycidyl metaxylene diamine and tetraglycidyl 1,3-bisaminomethylsicane obtained by reacting various amines with shrimp chlorohydrin. hexane, tetraglycidylaminodiphenylmethane,
Glycidyl amine compounds such as triglycidyl-p-aminophenol, triglycidyl-m-aminophenol, diglycidylaniline, diglycidyl orthotoluidine, etc. are used.

The urethane acrylate resin is a resin obtained by reacting an organic polyol with an organic polyisocyanate and further reacting with a hydroxyalkyl (meth)acrylate. It is also possible to leave some free isocyanate groups in the resin and combine it with the above vinyl ester resin. The organic polyols used include alkylene diols, alkylene diol ethers, alkylene diol esters, polyether polyols, and polyester polyols. Examples of the alkylene diol include ethylene glycol, propylene glycol, diethylene glycol, diisopropylene glycol, polyethylene glycol, polypropylene glycol, and butane diol. Hydroxyalkyl ethers of such alkylene diols can also be used. Examples of polyether polyols include polyoxymethylene, polyethylene oxide, and polypropylene oxaoid. The polyester polyol is a compound produced from the above-mentioned organic polyol and polycarboxylic acid, and has hydroxyl groups at both ends. The polyisocyanates used include toluene diisocyanate (TDI), isophorone diisocyanate, polymethylene polyphenyl diisocyanate, and the like. The hydroxyalkyl used (
Meth) acrylates include hydroxyethyl (meth)acrylate, hydroxypvir (meth)acrylate,
Hydroxybutyl (meth)acrylate. In these hydroxyalkyl (meth)acrylates,
The hydroxyl group is usually attached to the carbon in the beta position of the alkyl group. The alkyl group in the hydroxyalkyl (meth)acrylate can typically contain up to 8 carbon atoms. The fillers having a Mohs hardness of 5 or more used in the present invention include the following. Wollastonite (Mohs hardness 5)
, analcite (Mohs hardness 5), lepidocrocite (Mohs hardness 5),
Goethike (Mohs hardness 5-5+A),
niccolite, Mohs hardness 5
~5%), pyrochlore (Mohs hardness 5-5'A),
Microlite (Mohs hardness 5-5y2), datolite (Mohs hardness 5-5%), natrolite (Mohs hardness 5-5'A)
), cobaltite, Mohs hardness 5
'/2), haussannit
e, Mohs hardness 5%), perovskite (perovski
te, Mohs hardness 5'A), anhydrite (psilo
a+elane, Mohs hardness 5+A), uranite (u
raninite, Mohs hardness 5-6), turquoise (
turquoise, Mohs hardness 5-6), monoclinoenstatite, Mohs hardness 5
~6), monoclinal silica (clinoferrosili)
te, Mohs hardness 5-6), vision pyroxene (pigeo
nite, Mohs hardness 5-6), titanite (ilm)
hardness, Mohs hardness 5-6), sulfite (ar
senopyrite, Mohs hardness 5η~6), hematite (he+++ate, Mohs hardness 6), diopside (d
tops ide, Mohs hardness 5z~6'/2), hedenbergite, Mohs hardness 5
+A~6y2), augite (augiLe, -
[:-Hardness 5'A~6y2), Columbite (Mohs hardness 6), Tankrite (Mohs hardness 6~6K),
Anatase, Mohs hardness 5'/2~6
), brookite, Mohs hardness 5
z ~ 6), Husite (Mohs hardness 6)
, piedmontite, Mohs hardness 6
, lawsonite (Mohs hardness: 6), bamberlyite (pus+pellyite)
, Mohs hardness 6), enstatite,
Mohs hardness 6), hypersthene
, Mohs hardness 6), ferrosilite
, Mohs hardness 6), aegirine,
Mohs hardness 6), aegir
ine-augite, Mohs hardness 6), jadeite (
jadeite (Mohs hardness 6%), oaphacite (Mohs hardness 5-6), spodumens (Mohs hardness 6+A), rhodonite (Mohs hardness 6), anthophyllite (
Anthophophyllite, Morse hardness 6), Cuming Ton Shaku (CUMA + INGTONITE, Morse hardness 6), Glune flash (GRUNNERITE, Morse hardness 6) transfections (TRESOLITE % Movers hardness 5-6) ACTINOLITE, Morse hardness 5-6) , hornblende,
Mohs hardness 6), alkaline amphibole (alkali am
phiboles, Mohs hardness 6), rutile (rut)
il % Mohs hardness 6~6+A), amber feldspar (sani
dlne, Mohs hardness 6), orthoclase
se, Mohs hardness 6), microclinic potassium feldspar (microcl.
ine, Mohs hardness 6), albite (Mohs hardness 6), anorthite (Mohs hardness 6), nepheline (Mohs hardness 6), pyrite (Mohs hardness 6-6'/2)
), hematite (marcasite, Mohs hardness 6~
6%), kotoite, Mohs hardness 6'//
2), chloritoid, Mohs hardness 6
%), allanite, Mohs hardness 6'7
4) Magnesium olivine
, Mohs hardness 6'A), olivine (fayalit)
e, Mohs hardness 6+A), cassiterite
e, Mohs hardness 6-7), diasp.
ore, Mohs hardness 6IA to 7), quartz
, Mohs hardness 7), tridymite,
Mohs hardness 7), cristobarite
, Mohs hardness 7), coesite (Mohs hardness 8), opal (Mohs hardness 5'/2-6%), vesuvianite (vesuvtan)
ite, Mohs hardness 7), boracite
, Mohs hardness 7), epidote (Mohs hardness 7), cordierite
te, Mohs hardness 7), danburite (danb
urite, Mohs hardness 7), tourmaline
ine, Mohs hardness 7), silicate (silli + ma
nite, Mohs hardness 7), garnet (pyralsp)
ite, Mohs hardness 7-7%), granite (granite)
dite, Mohs hardness 7 to 7'A), zircon (z
ircon, Mohs hardness 7%), andalusite
site, Mohs hardness 7'A), mullite (mullite)
ite, Mohs hardness 7+A), cross stone (staurol)
ite, Mohs hardness 7'A), beryl
, Mohs hardness 7+A to 8), yellow jade (topaz, Mohs hardness 8), chrysoberyl (Mohs hardness 8+A), corundum (Mohs hardness 9)
, silicates such as glass spheres (Mohs hardness 5-7), hollow glass spheres (Mohs hardness 5-7), diamonds (Mohs hardness 10), metal (hydr)oxides, etc. Such a filler is used as a natural or artificial mineral containing these minerals as a main component, a processed, purified or processed mineral, or a mixture thereof.

When a soft filler with a Mohs hardness of less than 5 is used, it is difficult to improve the hardness of the formed coating. The amount of filler added is 50 parts by weight per 100 parts by weight of thermosetting resin.
~300 parts by weight. Preferably it is 75 to 200 parts by weight. If the amount of filler added is less than 50 parts by weight, sufficient coating hardness cannot be obtained.

When the amount of filler added exceeds 300 parts by weight, it becomes difficult to uniformly disperse the filler in the resin or the monomers that constitute the resin. Furthermore, if the amount of filler added exceeds 300 parts by weight, the viscosity becomes too high and the fluidity during in-mold coating decreases, and there is a risk that the coating will not be spread over the entire surface of the molded product to be coated.

The following compounds may be added in appropriate amounts to the in-mold coating composition of the present invention, if necessary. Styrene, alpha methylstyrene, divinylbenzene, vinyltoluene, diacrylphthalate, ethyl (meth)acrylate, methyl (meth)acrylate, proyl (meth)acrylate, butyl (meth)acrylate, hexyl (meth)acrylate, ethylene glycol (meth)acrylate, ) acrylate, copolymerizable monomers such as (meth)acrylate of diglycidyl ether of bisphenol; ketone peroxides, diasilver oxides, hydroperoxides, dialkyl peroxides, alkyl bar esters, parka polymers, etc. Nate I! , known initiators such as baroxyketals; known curing accelerators such as dimethylaniline and cobalt naphthenate; polymerization inhibitors such as rosebenzoquinone; carbon black, titanium oxide, iron oxide,
Cyanine pigment, aluminum flake, nickel powder, gold powder,
Pigments such as silver powder; dyes such as azo dyes, anthraquinones, indigoids, and stilbenes; polyvinyl acetate, polymethyl (meth)acrylate, polyethylene, ethylene-vinyl acetate copolymer, vinyl-styrene acetate copolymer, polyptadiene, Low shrinkage agents such as saturated polyesters and saturated polyethers; Conductivity imparting agents such as carbon black; Emulsifiers; Metal soaps such as zinc stearate; Mold release agents such as aliphatic phosphates and lecithin; Talc and pyrophyll Fillers with a Mohs hardness of less than 5, such as light, barium sulfate, gypsum, kaolinite, calcium carbonate, mica, and aluminum hydroxide.

The in-mold coating composition of the present invention obtained by mixing and stirring the above compounds can be used for in-mold coating in the same manner as conventionally known one-component in-mold coating compositions.

That is, for example, a molding material such as SMC or BMC is placed in a molding die heated to 130 to 160°C, and then heated to 40°C.
-120 kg/cm'' pressure for 30 seconds to 5 minutes, then the mold was slightly opened and the composition for coating inside the mold was injected and molded at 5~120 kg/cI12 at 130~160°C for 30 minutes. Reheat and repress for 5 minutes to 5 minutes.The thus obtained molded product has a cured film of the composition for in-mold coating formed on the entire surface of the SMC or BMC.
Molding materials such as MC or BMC at 130 to 160°C
, 40 to 120 kg/cn+'' for several tens of seconds to several minutes, then the pressure is reduced to 10 to 30 kg/ca+'', and a high-pressure injection machine is used to mold the product to 100 to 300 kg/c.
The mold coating composition may be injected at a high pressure of 30 to 100 kg/cm 2 and then spread and cured by increasing the pressure to 30 to 100 kg/cm 2 .

(Example) The present invention will be explained in detail below based on examples.

Note that "parts" below indicate parts by weight unless otherwise specified.

Example 1 Bolimar 6619 (manufactured by Takeda Pharmaceutical Co., Ltd., approximately 60% by weight of isophthalic acid-based unsaturated polyester resin, approximately 40% by weight of styrene monomer) 10
0 parts, silica (Kl clay manufactured by Maruo Calcium Co., Ltd.)
Silica content: 98.4%) 30 parts (this amount is 100 parts of resin)
(equivalent to about 50 parts per part) and 1 part of a hardening agent (Kayabutyl B manufactured by Kayaku Akzo Co., Ltd., t-butyl perpenzoate content 98% by weight), stirred thoroughly and poured into a mold. A coating composition was obtained.

Approximately 400 g (corresponding to a thickness of 3llI) of SMC (Polymermat 689-350 WBR manufactured by Takeda Pharmaceutical Co., Ltd.) was placed in a 30cs x 30cm square flat mold heated to 150°C. ．． This was pressure molded for 80 seconds at a pressure of 100 kg/cm''.
Next, the mold was slightly opened, 10 ml of the prepared composition for coating inside the mold was injected, and the mixture was reheated and repressed at 80 kg/cm'' and 150° C. for 120 seconds.

Open the mold, remove the mold, and apply a thickness of 100 μm to the entire surface of the molded product.
A coated body on which a cured film of the in-mold coating composition was formed was obtained.

This coated body was subjected to a pencil hardness test according to JIS-K5400. The result was 4H.

60 parts of silica stone (Kl clay strength content 98.4%, manufactured by Maruo Calcium Co., Ltd.) (this amount is 10 parts of resin)
An in-mold coating composition was obtained in the same manner as in Example 1, except that the amount was changed to about 100 parts (corresponding to 0 parts).

A coated body was obtained by molding in the same manner as in Example 1, in which a cured film of the in-mold coating composition having a thickness of 100 μm was formed on the entire surface of the molded article.

This coated body was subjected to a pencil hardness test according to JIS-K5400. The result was 5H.

Bolimar 9305Z (manufactured by Takeda Pharmaceutical Co., Ltd., bisphenol-based unsaturated polyester resin approximately 50% by weight, styrene monomer approximately 50% by weight) was used as the main polyester resin for the lining, and the amount of silica stone added was 50 parts (this amount was Example 1 except that the amount was approximately 100 parts per 100 parts of resin.
A composition for coating inside the mold was obtained in the same manner as above.

A coated body was obtained by molding in the same manner as in Example 1, in which a cured film of the in-mold coating composition was formed on the entire surface of the molded article to a thickness of 100 μm. This coated body was subjected to a pencil hardness test according to JIS-K5400. The result was 5H. Polymer 9305Z (manufactured by Takeda Pharmaceutical Co., Ltd., approximately 50% by weight of bisphenol-based unsaturated polyester resin, approximately 50% by weight of styrene monomer) as the tip-based soil polyester resin
Same as Example 1 except that 50 parts of feldspar (NC clay made by Fuji Talc Kogyo Co., Ltd.) was used instead of silica (this amount corresponds to about 100 parts to 100 parts of resin). A composition for coating inside the mold was obtained.

A coated body was obtained by molding in the same manner as in Example 1, in which a cured film of the in-mold coating composition having a thickness of 100 μm was formed over the entire surface of the molded product.

This coated body was subjected to a pencil hardness test according to JIS-K5400. The result was 5H. Back side ■
An in-mold coating composition was obtained in the same manner as in Example 4, except that the amount of Efeldspar added was 75 parts (this amount corresponds to about 150 parts to 100 parts of resin).

A coated body was obtained by molding in the same manner as in Example 1, in which a cured film of the in-mold coating composition having a thickness of 100 μm was formed on the entire surface of the molded article. This coated body was subjected to a pencil hardness test according to JIS-K5400. The result was 6H.

1 piece Mastan epoxy acrylate resin Neopol 8350H
(Manufactured by Nippon Yubika Co., Ltd., bisphenol-based epoxy acrylate resin unsaturated polyester resin approximately 60% by weight)
, styrene monomer (approximately 40% by weight)), and the amount of silica stone added was 50 parts (this amount corresponds to approximately 50 parts to 100 parts of resin) for in-mold coating in the same manner as in Example 1. A composition was obtained.

Molding was carried out in the same manner as in Example 1 to obtain a coated body in which a cured film of the in-mold coating composition of steel with a thickness of 100 μm was formed on the entire surface of the molded article.

This coating was subjected to a pencil hardness test according to JIS-K5400. The result was 5H.

Back example: Feldspar (manufactured by Fuji Talc Industrial Co., Ltd.) is used instead of silica stone.
C clay) 60 parts (this amount is approximately 1 part for 100 parts of resin)
A composition for in-mold coating was obtained in the same manner as in Example 6, except that 0.00 parts of the composition was used.

Molding was performed in the same manner as in Example 1 to obtain a coated body in which a cured film of the in-mold coating composition having a thickness of 100 μm was formed over the entire surface of the molded article.

This coated body was subjected to a pencil hardness test according to JIS-K5400. The result was 5H.

2-ship team ■ Neoball 8250L as epoxy acrylate resin instead of polyester resin (manufactured by Nippon Yubika Co., Ltd., bisphenol-based epoxy acrylate resin approx. 60
Weight %, styrene monomer approximately 401 (1%) ioo parts, 60 parts of wollastonite (Wollastonite VM-8N manufactured by Hayashi Kasei Co., Ltd.) instead of silica stone (this amount is approximately 100 parts per 100 parts of resin) An in-mold coating composition was obtained in the same manner as in Example 1, except that the composition (corresponding to ) was used. A coated body was obtained by molding in the same manner as in Example 1, in which a cured film of the in-mold coating composition with a thickness of 100 pg was formed on the entire surface of the molded article.

This coating was subjected to a pencil hardness test according to J[S-K5400. The result was 5H.

Example 8 except that 60 parts of glass beads (GB731C manufactured by Toshiba Barotini Corporation) (this amount corresponds to about 100 parts to 100 parts of resin) was used instead of the backing material. A composition for coating inside the mold was obtained in the same manner. Molding was performed in the same manner as in Example 1 to obtain a coated body in which a 100 μm thick cured film of the in-mold coating composition was formed on the entire surface of the molded article.

This coating was subjected to a pencil hardness test according to JIS-K5400. The result was 5H. Neoball 8411L (manufactured by Nippon Yubika Co., Ltd., bisphenol-based epoxy acrylate resin approx. 60
100 parts of styrene monomer (approximately 40% by weight), glass balloons (Scotch Glass Bubbles 828/750 manufactured by Sumitomo 3M Ltd.) instead of silica stone 30
An in-mold coating composition was obtained in the same manner as in Example 6, except that 50 parts (this amount corresponds to about 50 parts based on 100 parts of resin) was used.

A coated body was obtained by molding in the same manner as in Example 1, in which a cured film of the in-mold coating composition having a thickness of 100 μm was formed over the entire surface of the molded article.

This coated body was subjected to a pencil hardness test according to JIS-K5400. The result was 5H.

Neopol 8940 (manufactured by Nippon Yubika Co., Ltd.,
Polyester type urethane acrylate resin approx. 55
100 parts of styrene monomer (approximately 45% by weight), feldspar (manufactured by Fuji Tarque Gyo Co., Ltd., NC) instead of silica
clay) 55 parts (this amount is about 10 parts per 100 parts of resin)
An in-mold coating composition was obtained in the same manner as in Example 1, except that 0 parts of 1.

By molding in the same manner as in Example 1, a coated body was obtained in which a cured film of the in-mold coating composition with a thickness of 100 μm was formed on the entire surface of the molded article.

This coated body was subjected to a pencil hardness test according to JIS-K5400. The result was 6H.

A composition for coating inside a mold was obtained in the same manner as in Example 1 except that silica stone was not added.

A coated body was obtained by molding in the same manner as in Example 1, in which a cured film of the in-mold coating composition with a thickness of 60 μI was formed over the entire surface of the molded article.

This coated body was subjected to a pencil hardness test according to JIS-K5400. The result was H.

A composition for an in-mold coating was obtained in the same manner as in Example 8, except that no wollastonite was added.

A coated body was obtained by molding in the same manner as in Example 1, in which a cured film of the composition for coating inside the mold was formed on the entire surface of the molded article with a thickness of 50 μm. This coated body was subjected to a pencil hardness test according to JIS-K5400. The result was H.

A composition for an in-mold coating was obtained in the same manner as in Example 11, except that Hokkai feldspar was not added.

A coated body was obtained by molding in the same manner as in Example 1, in which a cured film of the in-mold coating composition was formed on the entire surface of the molded article to a thickness of 70 μm. This coating is JIS-
A pencil hardness test was conducted according to K5400. The result was H.

Northern comparison ■↓ Example 6 except that 60 parts of talc (this amount corresponds to about 100 parts to 100 parts of resin) was used instead of silica stone.
A composition for coating inside the mold was obtained in the same manner as above.

A coated body was obtained by molding in the same manner as in Example 1, in which a 100 μm-thick cured film of the in-mold coating composition was formed on the entire surface of the molded article. This coated body was subjected to a pencil hardness test according to JIS-K5400. The result was HB.

And JU juice i Same as Example 6 except that 60 parts of calcium carbonate (Super SS manufactured by Maruo Co., Ltd.) was used (this amount corresponds to about 100 parts to 100 parts of resin) instead of silica stone. A composition for coating inside the mold was obtained.

A coated body was obtained by molding in the same manner as in Example 1, in which a cured film of the in-mold coating composition was formed on the entire surface of the molded article with a thickness of 100 μm.

This coated body was subjected to a pencil hardness test according to JIS-K5400. The result was H.

An in-mold coating composition was obtained in the same manner as in Example 6, except that the amount of silica stone added was 12 parts (corresponding to about 20 parts per 100 parts of resin).

A coated body was obtained by molding in the same manner as in Example 1, in which a cured film of the in-mold coating composition was formed on the entire surface of the molded article with a thickness of 100 μm.

This coating was subjected to a pencil hardness test according to JIS-K5400. The result was H.

Table 1 shows a list of the above results.

Table 1 As can be seen from Table 1, the hardness of the coated body coated with the in-mold coating composition containing a filler having a Mohs hardness of 5 or more was 4H or more. Inside the mold when no filler is added (Comparative Examples 1, 2 and 3), when soft filler is used (Comparative Examples 4 and 5), and when the amount of filler added is insufficient (Comparative Example 6) The hardness of all coated bodies coated with the coating composition was as low as H or less.
(Effects of the Invention) As described above, by using the in-mold coating composition of the present invention, a highly hard coated body can be obtained in the in-mold coating method.

that's all

Claims (1)

[Claims] 1. Mohs hardness is 5 for 100 parts by weight of thermosetting resin
An in-mold coating composition containing 50 to 300 parts by weight of the above filler.