JPS61168663A - High-molecular material composition having improved light resistance - Google Patents

Abstract

PURPOSE:To provide the title compsn. which is not colored, has excellent mechanical strength, can be used over a long period of time and is useful for various moldings, paints and adhesives, by blending a hindered amine light stabilizer and a semicarbazide compd. with a high-molecular material. CONSTITUTION:0.001-5pts.wt. hindered amine light stabilizer contg. at least one group of formula I, 0.001-5pts.wt. semicarbazide compd. of formula II (wherein R is CH3, C2H5, phenyl, R1 is a bivalent hydrocarbon group) obtd. by reacting dimethylhydrazine or methylphenylhydrazine with a polyisocyanate such as tolylene diisocyanate, and optionally additives such as phenolic antioxidant, sulfur antioxidant, phosphorus compd., etc., are blended with 100pts.wt. high-molecular material such as alpha-olefin polymers, various vinyl (co) polymers, polyamides, epoxy resins or diene rubber.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a stabilized polymeric material composition, in particular:
The present invention relates to a polymeric material composition in which a hindered amine light stabilizer and a specific semicarbazide compound are used.

[Prior art and problems to be solved by the invention] Synthetic resins such as polyethylene, polypropylene, ABS resin, and polyvinyl chloride resin are sensitive to ultraviolet rays, and the effects of this can cause deterioration of color and reduction of mechanical strength. It is known that it causes such problems and cannot withstand long-term use.

To prevent these harmful effects, compounds such as benzophenone, benzotriazole, benzoate, and piperidine have been used, but many of these compounds color the resin, and The effect was also insufficient, and further improvements were desired.

Among these compounds, piperidine-based compounds have attracted particular attention in recent years because they are non-coloring and have a relatively large photostabilizing effect.

However, although hindered amine compounds such as piperidine compounds are relatively excellent light stabilizers, their effects when used alone are still insufficient. For this reason, it has been proposed to use piperidine-based compounds in combination with UV absorbers such as benzophenone-based, benzotriazole-based, phenylsalicylate-based, and oxalic diamide-based agents, but the effects of these combinations are additive. However, it was not practical and satisfactory.

In addition, the use of substituted semicarbazides as a coloring preventive agent for polyaminoacrylate has also been reported in Japanese Patent Application Laid-Open No. 53-144.
Although it was proposed in Japanese Patent No. 949, the effect was insufficient and unsatisfactory.

[Means for solving problems]

In view of the current situation, the present inventors have conducted intensive studies and found that when a hindered amine light stabilizer and a specific semicarbazide compound are combined in a polymeric material, the effect is higher than when each of them is used alone. It was discovered that the effect is significantly superior, and the present invention was achieved.

That is, in the present invention, 0.001 parts by weight of at least one type of +al hindered amine light stabilizer is added to 100 parts by weight of the polymeric material.
~5 parts by weight and (b1) Tables 001 to 5 with the following general formula (I)
The object of the present invention is to provide a polymeric material composition with improved light resistance, which contains the following parts by weight.

RR (In the formula, R represents a methyl group, an ethyl group, or a phenyl group, and R1 represents a divalent hydrocarbon group.) The polymer material composition of the present invention will be described in detail below.

Specific examples of the hindered amine afterglow stability used in the present invention include the following.

tlkl 4-benzoyloxy-2,2,6,6-
Chitramethylpiperidine Na2l-(3,5-di-tert-butyl-4-hydroxyquenylbrobionyloxyethyl)-4-(3,5-
Di-tert-butyl-4-hydroxyphenylpropionyloxy)-2,2,6,6-tetramethylbiperidine Na34-(β-3', 5°-di-tert-butyl-4'
-oxyphenyl-propionyloxy)-2,2,6
,6-titramethylpiperidine 4 bis(2,2,6,6-tetramethyl-4-piperidyl)sepacade round 5 bis(I,2,2,6,6-bentamethyl-4-
piperidyl)sepacade hh6 bis(I,2,2,6,6-pentamethyl-
4-Piperidyl)-2-butyl-2-(3,5-di-tert-butyl-4-hydroxybenzyl)malonate Nagi 7 Bis(I-acryloyl-2,2,6,6-tetramethyl-4-piperidyl) -2゜2-bis (3,5
-tert-butyl-4-hydroxybenzyl)malonate 8 bis(9-aza, s, io, io-tetramethyl-3-ethyl-1,5-dioxaspiro(5,5)
-3-undecylmethyl)methyliminodiacetate 9 bis(2,2,6,6-tetramethyl-4-piperidyl-1-oxyl)sepacade 10 tris(2,
2,6,6-tetramethyl-4-piperidyl)citrate 11) Lis(2,2,6,6-tetramethyl-4
-piperidyl)nitrilotriacetate Na12)
Tris(2,2,6,6-tetramethyl-4-piperidyl)butanetricarboxylate 13 Tris(2,2,6,6-tetramethyl-4-piperidyl)trimelitate 14 Tetra(2,2,6 ,6-tetramethyl-4
-Piperidyl)pyromellitate 11kL15 Tetra(2,2,6,6-tetramethyl-4-piperidyl)-1,3-bis(aminomethyl)cyclohexanetetraacetate Magnet 16 Tetra(
2,2,6,6-tetramethyl-4-piperidyl) -
1,2,3,4-butanetetracarboxylate 11h17 Tris(2,2,6,6-tetramethyl-4-piperidyl) mono(isotridecyl)-1,
2,3,4-butanetetracarboxylate 18 tetra(I,2,2,6,6-bentamethyl-4-piperidyl)-1,2,3,4-butanetetracarboxylate 1'&119 1-lis ,2,2,6,6-bentamethyl-4-piperidyl) mono (isotridecyl)
-1,2,3,4-butanetetracarboxylate 20 bis(I,2,2,6,6-bentamethyl-4-piperidyl) di(tridecyl)-1,2,3,4
-butanetetracarboxylate 21 bis(2,2,6,6-tetramethyl-4-
piperidyl) ・di(tridecyl)-1゜2.3.4-
Butanetetracarboxylate 22 bis(2,2,
6,6-tetramethyl-1=oxy-4-piperidyl) di(tridecyl)-1,2,3,4-butanetetracarboxylate 23 mono(I,2,2,6,6-bentamethyl-4- monomethyl sebacate 243.9-bis [1,1-dimethyl-2-[tris(2,2,6,6-tetramethyl-4-piperidyloxycarbonyl)butylcarbonyloxyphethyl]-
2,4,8゜O-tetraoxaspiro(5,5)undecane臘253.9-bis[1,1-dimethyl-2-[tris(I,2,2,6,6-bentamethyl-4-piperidyloxy) carbonyl)butylcarbonyloxyphethyl)-2,4゜8, IO-tetraoxaspiro(5,5)
Undecane 262.4.6-) Lis (2,2,6,6-tetramethyl-4-piperidyloxy) -S-triazine 272-Butylamino-4,6-bis (9-aza-
8,8,10,10-tetramethyl-3-ethyl-1,
5-Dioxaspiro[5゜5]-3-undecylmethoxy)-s-triazine28 N,N'-bis[4,6-bis(9
-Aza-8,8,10,10-tetramethyl-3-ethyl-1,5-dioxaspiro[5゜5]-3-undecylmethoxy)-3-triazin-2-ylcopiperazine 29 1,5 ,8.12-tetrakis(4,6-bis(N-(2,2,6,6-tetramethyl-4-piperidyl)butylamino]-1°3.5-)riazin-2-yl) -1 ,5゜8.12-tetraazadodecane fish 30 bis(9-aza-8,8,10,10-tetramethyl-3-ethyl-1,5-dioxaspiro(5,
5) -3-Undecylmethyl) carbonate hidden 31 bis(9-aza-8,8,10,10-tetramethyl-3-ethyl-1,5-dioxaspiro[5,
5]-3-undecylmethyl)/hydrogenated bisphenol A
・Dicarbonate cation 32 bis(2,2,6,6-tetramethyl-4-
piperidyl)/pentaerythritol/diphosphite Chen 33 Bis(9-aza-8,8,10,10-tetramethyl-3-ethyl-1,5-dioxaspiro(5,
5) -3-Undecylmethyl)・Pentaerythritol・Diphosphite 11h34 Tetra (2,2,6,6-tetramethyl-4-piperidyl)・Bisphenol A・Diphosphite 353,5-di-tert-butyl-4-hydroxy Benzyl-bis(2,2,6,6-tetramethyl-4-piperidyl)phosphonate 11h36 1-(2-hydroxyethyl-2,2,6°6-tetramethyl-4-piperiditul/dimethyl succinate polycondensate) N137 2-tertiary octylamino-4,6-dichloro-s-triazine/N,N'-bis(2°2.6.6
-tetramethyl-4-piperidyl)hexamethylenediamine polycondensate 11kL381.6-bis(2,2,6,6-tetramethyl-4-piperidylamino)hexane/dibromoethane polycondensate 11h39 bis(9-aza- 8,8,10,10-
Tetramethyl-3-hydroxymethyl-1゜5-dioxaspiro(5,53-3-undecylmethyl)ether 403-glycidyl-8-methyl-7,7,9゜9-
Tetramethyl-1,3,8-)diazaspiro(4,53
Decane-2,4-dione 413-dodecyl-8-acetyl-? , 7.9°9-tetramethyl-1,3,8-)
Diazaspiro(4,5)decane-2,4-dione tk4
2 3-octyl-7,7,9,9-tetramethyl-1
,3,8-)diazaspiro[4゜5]decane-2,4-
Zeon Arashi 43 2,2,4.4-tetramethyl-7-oxa-
3,20-diazadispiro(5,1゜11.2)heneicosan-21-one 443-dodecyl-1-(2,
2,6,6-tetramethyl-4-piperidyl)-2,5
-Pyrrolidinedione The semicarbazide compound represented by the general formula (I) used in the present invention is dimethyl (or diethyl) hydrazine or methyl phenylhydrazine, 2.4-)lylene diisocyanate, 2.6-tolidine diisocyanate, 4 , 4゛-diphenylmethane diisocyanate, toridine diisocyanate, xylylene diisocyanate,
1,5-naphthylene diisocyanate, isophorone diisocyanate, triphenylmethane diisocyanate,
It can be easily produced by reacting with polyisocyanates such as lysine diisocyanate, hexamethylene diisocyanate, dimer diisocyanate, phenylene diisocyanate, diphenyl ether diisocyanate, dianisidine diisocyanate, bis(isocyanatomethyl)cyclohexane, and dicyclohexylmethane diisocyanate.

Therefore, examples of the semicarbazide compound represented by the general formula (I) used in the present invention include the following compounds.

5C-1 Hexamethylene bis (dimethyl semicarbazide) SC-2 Hexamethylene bis (diethyl semicarbazide) SC-3 Hexamethylene bis (methyl phenyl semicarbazide) SC-41-Rylene bis (dimethyl semicarbazide) SC-5 Xylylene bis (dimethyl (semicarbazide) SC-6 methylene-di-P-phenylene bis (dimethyl semicarbazide) SC-7 methylene-di-p-cyclohexylene bis (dimethyl semicarbazide) SC-8 isophorone bis (dimethyl semicarbazide) Semicarbazide represented by the general formula (ri) The amount of the compound added is 0.001 to 5 parts by weight, preferably 0.01 to 3 parts by weight, per 100 parts by weight of the polymeric material.

Examples of polymeric materials whose stability is to be improved in the present invention include α-olefin polymers such as polyethylene, polypropylene, polybutene, and poly-3-methylbutene, ethylene-vinyl acetate copolymers, and ethylene-propylene copolymers. Polyolefins such as polymers and their copolymers, polyvinyl chloride, polyvinyl bromide, polyvinyl fluoride, polyvinylidene chloride, chlorinated polyethylene, chlorinated polypropylene, polyvinyldene fluoride, brominated polyethylene, chlorinated rubber, vinyl chloride vinyl acetate copolymer,
Vinyl chloride-ethylene copolymer, vinyl chloride-propylene copolymer, vinyl chloride-styrene copolymer, vinyl chloride-isobutylene copolymer, vinyl chloride-vinylidene chloride copolymer, vinyl chloride-styrene-trimaleic anhydride Original copolymer, vinyl chloride-styrene-acrylonitrile copolymer, vinyl chloride-butadiene copolymer, vinyl chloride-isoprene copolymer, vinyl chloride-chlorinated propylene copolymer, vinyl chloride-vinylidene chloride-vinyl acetate copolymer Original copolymer, vinyl chloride-acrylic acid ester copolymer, vinyl chloride-maleic acid ester copolymer, vinyl chloride-methacrylic acid ester copolymer, vinyl chloride-acrylonitrile copolymer, internally plasticized polyvinyl chloride, etc. Halo-containing synthetic resins, petroleum resins, coumaron resins, polystyrene, polyvinyl acetate, acrylic resins, polyacrylonitrile, copolymers of styrene and other monomers (e.g. maleic anhydride, butadiene, acrylonitrile, etc.), acrylonitrile-butadiene-styrene copolymer,
Acrylic acid ester-butadiene-styrene copolymer, methacrylate resin such as polymethyl methacrylate, polyvinyl alcohol, polyvinyl formal,
Polyvinyl butyral, linear polyester, polyphenylene oxide, polyamide, polycarbonate, polyacetal, polyurethane, cellulose resin, or phenol resin, urea resin, melamine resin, epoxy resin,
Examples include unsaturated polyester resins and silicone resins. Furthermore, isoprene rubber, butadiene rubber,
Acrylonitrile-butadiene copolymer rubber, styrene-
Rubbers such as butadiene copolymer rubber or blends of these resins may also be used.

Also included are crosslinked polymers such as crosslinked polyethylene crosslinked with peroxide or radiation, and foamed polymers such as expanded polystyrene foamed with a foaming agent.

By further adding a well-known phenolic antioxidant to the composition of the present invention, its oxidative stability can be further improved. Examples of the phenolic antioxidant include 2,6-di-tert-butyl-p-cresol, 2,6-di-tert-butyl-p-cresol,
diphenyl-4-octoxyphenol, stearyl-
(3,5-di-methyl-4-hydroxybenzyl)thioglycolate, stearyl-β-(4-hydroxy-3
゜5-di-tert-butyl phenyl) propionate, distearyl-3,5-di-tert-butyl-4-hydroxybenzyl phosphonate, 2.4.6-tris (3",
5゛-di-tert-butyl-4-hydroxybenzylthio)
1, 3.5. -) riazine, distearyl(4-hydroxy-3-methyl-5-tert-butyl)penzylmaloney), 2.2'-methylenebis(4-methyl-6-tert-butylphenol), 4.4°-methylenebis( 2,6-
di-tert-butylphenol), 2,2'-methylenebis(6-(I-methylcyclohexyl) p-cresol)
, bis[3,5-bis(4-hydroxy-3-tert-butylphenyl)butyrin acid coglycol ester,
4.4''-butyldenbis (6-tert-butyl-m-cresol), 2.2゛-ethylidenebis (4,6-di-tert-butylphenol), 2.2°-ethylidenebis (4
-Second-butyl-6-tert-butylphenol), l, 1゜3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane, bis[2-tert-butyl-4-methyl-6 -(2-hydroxy-3-tert-butyl-5-methylbenzyl)phenyl]terephthalate, 1,3.5
-) Lis(2,6-dimethyl-3-hydroxy-4-tert-butyl)benzyl isocyanurate, 1,3.5-tris(3°5-di-tert-butyl-4-hydroxybenzyl) = 2.4. 6-Dolimethylbenzene, tetrakis [
Methylene-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate comethane, 1.3.5-
) Lis(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate, 1°3.5-Tris((3
,5-di-tert-butyl-4-hydroxyphenyl)propionyloxyethyl]isocyanurate, 2-octylthio-4°6-di(4-hydroquine-3,5-di-tert-butyl)phenoxy-1,3,5 - Triazines, phenols such as 4°4"-thiobis(6-tert-butyl-m-cresol), and carbonic acid oligoesters of 4,4°-butylidenebis(2-tert-butyl-5-methylphenol) degrees 2, 3, 4 degrees 5.6, 7, 8, 9.1
Examples include polyhydric phenol carbonate oligoesters such as 0, etc.

It is also possible to further add a sulfur-based antioxidant to the composition of the present invention to improve its oxidative stability.

Examples of the sulfur-based antioxidant include dilauryl,
Dialkyl thiodipropionates such as similystyl, distearyl, and butyl, octyl, lauryl
, alkylthiopropionic acid polyhydric alcohols such as stearyl (e.g. glycerin, trimethylolethane,
trimethylolpropane, pentaerythritol, trishydroxyethyl isocyanurate) (for example, pentaerythritol tetralaurylthiopropionate).

By adding a compound, the light resistance and heat resistance can be further improved. Examples of the phosphorus-containing compound include trioctyl phosphite, trilauryl phosphite, tridecyl phosphite, octyl-diphenyl phosphite, tris(2,4-di-tert-butylphenyl) phosphite, triphenyl phosphite, tris (butoxyethyl) phosphite, tris(nonylphenyl) phosphite, distearinpentaerythritol diphosphite, tetra(tridecyl) −
1,1,3-1-lis (2-methyl-5-tert-butyl-4-hydroxyphenyl)butane diphosphite, tetra(CI2~ls mixed alkyl)-4,4°-isopropylidene diphenyl diphosphite , tetra(tridecyl)-4,4°-butylidenebis(3-methyl-6-
tertiary butylphenol) diphosphite, tris(3,
5-di-tert-butyl-4-hydroxyphenyl) phosphite, tris(mono-di-mixed nonylphenyl) phosphite, hydrogenated-4,4"-isopropylidene diphenol polyphosphite, bis(octylphenyl) bis (,4,4'-butylidene bis(3-methyl-6-tert-butylphenol)] ・1゜6-hexanediol diphosphite, phenyl ・4.4"-isopropylidene diphenol ・pentaerythritol diphosphite, Bis(2゜4-di-tert-butylphenyl)pentaerythritol diphosphite, bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite, tris[4,4'-isopropylidene bis( 2-tert-butylphenol)] phosphite, phenyl diisodecyl phosphite, di(nonylphenyl)
Pentaerythritol diphosphite, tris(I,3
-di-stearoyloxyisopropyl) phosphite, 4.4°-isopropylidene bis(2-tert-butylphenol) di(nonylphenyl) phosphite, 9,
10-di-hydro-9-oxa-10-phosphaphenanthrene-10-oxide, tetrakis(2,4
-di-tert-butylphenyl)-4,4''-biphenylene diphosphonite, and the like.

By adding other light stabilizers to the composition of the invention, its light resistance can be further improved.

Examples of the light stabilizer include 2-hydroxy-4-
Methoxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone, 2,2゛-di-hydroxy-
Hydroxybenzophenones such as 4-methoxybenzophenone and 2,4-dihydroxybenzophenone, 2-(
2°-Hydroxy-3°-t-butyl-5°-methylphenyl)-5-chlorobenzotriazole, 2-(2'
-hydroxy-3',5'-di-t-butylphenyl)-5-chlorobenzotriazole, 2-(2゜-hydroxy-5゛-methylphenyl)benzotriazole,
Benzotriazoles such as 2-(2°-hydroxy-3゛5゛-di-t-amylphenyl)benzotriazole, phenyl salicylate, pt-butylphenyl sylate, 2゜4-di-t-butyl phenyl-3,5
-di[=butyl-4-hydroxybenzoate, benzoates such as hexadecyl-3,5-di-t-butyl-4-hydroxybenzoate, 2,2゛-thiobis(
4-t-octylphenol)Ni salt, [2,2'-thiobis(4-t-octylphenolate)]-]n-butylamineNi, (3,5-di-t-butyl-4-hydroxybenzyl)phosphone acid monoethyl ester Ni
Nickel compounds such as salts, α-cyano-β-methyl-β
Substituted acrylonitrile i such as -(p-methoxyphenyl)acrylic methyl and N-2-ethylphenyl-N'
Examples include oxalic dianilides such as -2-ethoxy-5-tert-butylphenyl oxalic acid diamide and N-2-ethylphenyl-No-2-ethoxyphenyl oxalic acid diamide.

In addition, if necessary, the composition of the present invention may contain a heavy metal deactivator, a nucleating agent, a metal soap, an organic tin compound, a plasticizer, an epoxy compound, a pigment, a filler, a blowing agent, an antistatic agent, and a flame retardant. , lubricants, processing aids, etc. The polymeric materials stabilized according to the present invention can be used in a wide variety of forms, such as films, fibers, tapes, sheets, and various molded products;
It can also be used as a base material in paints, binders for lacquers, adhesives, putties and photographic materials.

Next, the present invention will be specifically explained with reference to Examples.

However, the present invention is not limited to these examples.

Example 1 <Blend> Polypropylene 100 parts by weight Calcium stearate 0.2 enylpropionate)
.

A press sheet with a thickness of 0.3 mm was prepared using the above formulation, and a light resistance test was conducted on this sheet using a high-pressure mercury lamp. The results are shown in Table-1.

Table-1 Comparative examples of hindered amine-based light resistance stabilizers Time it*1
280 1-2*2320 Example 1-1 Inhibitor compound 4601-2
Compound 4 4801-3 -5 Compound
4701, -4 inhibitor 16 compound
5101-5 Floor 20 compound 4501-
611h25 compound 5401-7 inhibition 2
7 compounds 4301-8 31 compounds
4501-9N136 Compound 5101
--10 Na37 compound 5201-1
1 NLL38 compound 550 notes] *l;
(However, 0.2 part of 5c-i compound is used) *2: Nk
Using 0.2 part of L1 compound (but without 5C-1 compound) Example 2 Blend> Polyethylene 100 parts by weight Ca-stearate 1.0 bionate] Methanedistearyl thiodipropionate 0.3 lupoxylate (N1116 compound ) The above mixture was kneaded and pressed to form a sheet with a thickness of 0.5 mm. Using this sheet, the light resistance was measured in a weather oven, and the time until it became brittle was measured. The results are shown in Table-2.

Table 2 Example 3 <Blend> Polyvinyl chloride 100 parts by weight Dioctyl phthalate 48 Epoxidized soybean oil 2 Trisnonylphenyl phosphite 0.2 Ca-stearate 1.0 Zn-stearate 03l (SC
-1 compound) Hindered amine light stabilizer 0.1 (see Table-3) The above compound was kneaded on a kneading roll, and the thickness was llllllll.
I created a sheet. Using this sheet, a light resistance test was conducted in a weather offter. The results are shown in Table-3.

Table-3 Example 4 <Formulation> ABS resin 100 parts by weight 4.4
'-Butylidene bis(2-0.13-butyl-cresol) (SC-1 compound) Hindered amine light stabilizer 0.15 (see Table 4) The above mixture was rolled and then pressed to a thickness of 31IllI.
I created a + sheet. Using this sheet, the residual tensile strength after 800 hours of irradiation was measured using a weatherometer. The results are shown in Table-4.

Table-4 Example 5 <Formulation> Polyurethane resin 100 parts by weight (Asahi Denka u-100) Ba-stearate 0.7Z low stearate 0.32.6-G 3rd
Butyl-p-cresol 0.1 (SC-1 compound) The above blend was kneaded on a roll at 70°C for 5 minutes,
A sheet with a thickness of 0.5 mm was prepared by pressing at ℃ for 5 minutes. Using this sheet, the residual elongation rate after 50 hours of irradiation was measured using a fade meter. The results are shown in Table-5.

Table 5 Example 6 The compound (stabilizer component) of the present invention is also useful as a light stabilizer for paints. In this example, the effect of a two-layer metallic luster paint consisting of a base coat containing a metal pigment and a transparent top coat was examined.

a) Base coat paint methyl methacrylate 100g, n-butyl acrylate 6
6g2 2-hydroxyethyl methacrylate 30g, 4g methacrylic acid1 xylene 80g and n-butanol2
0g, heated to 110°C while stirring, added 2g of azobisisobutyronitrile, 0.5g of dodecylmercaptan,
A solution consisting of 80 g of xylene and 20 g of n-butanol was added dropwise over 3 hours. Thereafter, the mixture was stirred at the same temperature for 2 hours to prepare an acrylic resin solution with a resin solid content of 50%.

12 parts by weight of the above acrylic resin solution, 2.5 parts by weight of butoxylated methylolmelamine (manufactured by Mitsui Toatsu Co., Ltd.; Kneepan 203E60; resin solid content 60%), 50 parts by weight of cellulose acetate butyrate resin (20% butyl acetate rg/&) parts, aluminum pigment (manufactured by Toyo Aluminum Co., Ltd.; Alpaste 1123N>5.5 parts by weight, 10 parts by weight of xylene, 20 parts by weight of butyl acetate, and 0 parts by weight of copper phthalocyanine blue)
．． One part of the double layer was taken and used as a base coat paint.

b) Top coat paint 48 parts by weight of the above acrylic resin solution, 10 parts by weight of butoxylated methylolmelamine, 10 parts by weight of xylene, 4 parts by weight of butyl glycol acetate, 0.1 part by weight of 5C-1 compound, and hindered amine light stabilizer (Table 1). -6)0
．． 05 parts by weight was taken and used as a top coat paint.

A base coat paint was sprayed onto the primed steel plate to give a dry film thickness of 20 μm, and after being left for 10 minutes, a top coat paint was sprayed to a dry film thickness of 30 μm. After leaving it for 15 minutes, it was baked at 40° C. for 30 minutes to obtain a test piece.

The above sample was placed in a weatherometer and the time until cracking of the coating film appeared was measured. The results are shown in Table-6.

Table-6

Claims (1)

Scope of Claims: 0.001 to 5 parts by weight of at least one of (a) a hindered amine light stabilizer and (
b) A polymer material composition with improved light resistance, which contains 0.001 to 5 parts by weight of at least one semicarbazide compound represented by the following general formula (I). ▲There are mathematical formulas, chemical formulas, tables, etc.▼(I) (In the formula, R represents a methyl group, ethyl group, or phenyl group, and R_1 represents a divalent hydrocarbon group.)