JPS63196654A - Stabilized high-molecular material composition - Google Patents

Abstract

PURPOSE:To obtain a high-molecular material compsn. having improved light resistance, by adding a compd. having a specified heterocyclic amino substituent to a high-molecular material. CONSTITUTION:A compsn. is obtd. by adding 0.001-5pts.wt. compd. of formula I to 100pts.wt. high-molecular material. In the formula, A is Cl, X, -NR1R2 or -NR1R3; B is H or a group of formula II; C is Cl or X; R1 is a group of formula III; R2 is H, an alkyl or an acyl; R3 is a 2-20C alkylene; X is a group of formula IV or V; R4 and R5 are each H, methyl, benzyl, a group of formula VI or -COOR7; m is 1-3; R7 is an alkyl; R6 is a direct bond or a 1-6C alkylene; Y1 is W or =N-R4; Y2 is Y1 or -O-; p is 0-2; n is 2-30. The compd. of formula I can be prepd. by reacting cyanuric chloride with an alkylenebis(tetramethylpiperidylamine) and then reacting the reaction product with a compd. of H-X.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention particularly relates to a stabilized polymeric material composition with improved light resistance, specifically a composition having a 2,2,6,6-titramethylpiperidyl group. containing a cyanurate derivative,
In particular, it relates to stabilized polymeric material compositions with improved light resistance.

[Prior art and problems to be solved by the invention] Synthetic resins such as polyethylene, polypropylene, and polyvinyl chloride are generally sensitive to the effects of light, and deteriorate due to the effects of light, resulting in discoloration or a decrease in mechanical strength. It is known that it causes such problems and cannot withstand long-term use.

Therefore, in order to prevent the deterioration of synthetic resins due to this light, various stabilizers have been used in the past, but the stabilizing effect of the conventionally used light stabilizers is still insufficient.
In addition, many stabilizers themselves are unstable to heat or oxidation, are easily extracted from the resin by solvents such as water, and many also color the resin, making them difficult to maintain over a long period of time. It was not possible to stabilize the synthetic resin.

Among these conventionally used light stabilizers, piperidine compounds are themselves non-coloring and have attracted particular attention in recent years.

However, conventionally known piperidine-based compounds have insufficient photostabilizing ability and also have the disadvantage that they are easily extracted from the resin by water.

In addition, these piperidine-based compounds themselves have insufficient heat resistance, and when processing synthetic resins at high temperatures, they often decompose or volatilize and lose their effectiveness.

Among these piperidine-based compounds, compounds containing a triazine ring have the advantage that the compound itself has relatively good heat resistance, can use inexpensive soarnuric chloride as a raw material, and is easy to react. have.

Examples of piperidine compounds containing a triazine ring include JP-A-49-21389, JP-A-52-71486, JP-A-52-73886, JP-A-53-9782, JP-A-53-67749, JP-A-54-106483, JP-A-54-126249, JP-A-55-9818
No. 0, JP-A-55-102637, JP-A-55-10
No. 4279, JP-A-56-4639, JP-A-56-3
Various compounds have been proposed in JP-A-0974 and JP-A-58-18378.

In the compounds described in these publications, JP-A-52-714
Compounds in which two or more triazine rings are condensed with diamine or glycol, such as the compound described in Japanese Patent No. 86, are relatively excellent in heat resistance, extraction resistance, and the like.

However, even with these compounds, their heat resistance, extraction resistance, and photostabilizing ability are still unsatisfactory, and there has been a demand for the development of even better photostabilizers.

[Means for solving problems]

In view of the current situation, the present inventors have conducted intensive studies and found that a compound represented by the following general formula (I) having a specific heterocyclic amine as a substituent has excellent heat resistance, extraction resistance, and light resistance. It was found that it has excellent stabilizing ability and is extremely useful as a stabilizer for polymeric materials.

(In the formula, A represents a chlorine atom, a group represented by X, or R
1 represents a hydrogen atom, an alkyl group or an acyl group, R2 represents an alkylene group having 2 to 20 carbon atoms, 4 R1 represents a hydrogen atom, a methyl group, a benzyl group, -C
,! 1, -011 or -COOR, m is 1 to
3, R1 represents an alkyl group, Rh represents a bond or an alkylene group having 1 to 6 carbon atoms, Y2 represents Y
It represents a group represented by l or -〇-, and p represents O~2.

n represents 2 to 30. ) The present invention was made based on the above findings, and is a stabilized polymer prepared by adding 0.001 to 5 parts by weight of the compound represented by the general formula (+) to $4,100 parts by weight of a polymer material. The present invention provides a molecular material composition.

The polymer material composition of the present invention will be explained in detail below.

In the compound represented by the general formula (I) used in the present invention, examples of the alkyl group represented by R1 include methyl, ethyl, propyl, isopropyl, butyl,
Amyl, hexyl, heptyl, octyl, 2-ethylhexyl, nonyl, decyl, dodecyl, octadecyl, benzyl, phenylethyl, 2-hydroxyethyl, 2-
Hydroxypropyl, 2-hydroxybutyl, 2.3-
Examples of the acyl group include epoxypropyl, and examples of the acyl group include acetyl, propionyl, butyroyl, acryloyl, methacryloyl, octanoyl, and hendiyl.

Further, examples of the alkyl group represented by R1 include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, hexyl, cyclohexyl, octyl, isooctyl, 2-ethylhexyl, tertiary octyl, decyl, dodecyl, Examples include tetradecyl and octadecyl.

The compound represented by the general formula (I) of the present invention can be obtained by, for example, reacting cyanuric chloride with alkylene bis(tetramethylpiperidylamine), and then reacting this with H-X (X is the compound represented by the general formula (I)). A method of reacting a specific heterocyclic amine compound represented by ], which is the same as X in the compound represented by It can be produced by a method of reacting methylpiperidylamine).

Examples of the heterocyclic amine compound represented by H-X used to produce the compound represented by the general formula (I) include pyrrolidine, piperidine, and 2-pipecoline (
2-methylpiperidine), 3-pipecoline, 4-pipecoline, 4-benzylpiperidine, 2,4-lupetidine (2,4-dimethylpiperidine), 2,6-lupetidine, 3.5-lupetidine, 3-hydroxymethyl Piperidine, 2-hydroxyethylpiperidine, methyl pipecolate, methyl isonipecotate, ethyl isonipecolate, N-methylpiperazine, N-carbethoxypiperazine, N-methylhomopiperazine, N-aminopiperidine, N-amino-4-methylpiperidine , N-methyl-N
' -aminopiperidi7,N-(3-aminopropyl)
Piperidine, N-(3'-aminopropyl)-2-methylpiperidine, N-(3'-aminopropyl)-
Examples include 4-methylpiperidine, N-(2-aminoethyl)piperidine, N-(2'-aminoethyl)-4-methylpiperazine, and N-(3-aminopropyl)morpholine.

Hereinafter, the present invention will be explained in more detail by showing synthesis examples of the compound represented by the general formula <1) used in the present invention, but the present invention is not limited by the following synthesis examples.

Synthesis Example 1 9.2 g (0.05 mol) of cyanuric chloride, 5.0 g (0.05 mol) of 2-methylpiperidine, 2.0 g of sodium hydroxide, and 100 M1 of xylene were taken and stirred at 80° C. for 8 hours. Here 1.6-bis (2,2゜6.6
-tetramethyl-4-piperidylamino)hexane 21
．． 7g (Q. 055 mol) and sodium hydroxide 4.4
g was added thereto, and the mixture was stirred under reflux for 15 hours.

After washing with water and drying, the solvent was removed to produce a pale yellow solid product with a molecular weight of about 3500 [Compound 11hl (N =
18. ．． 9%, Cl-0.15%)] was obtained.

Synthesis Example 2 Cyanuric chloride 9.2 g (0.05 mol), 1,6-bis(2,2,6,6-tetramethyl-4-piperidylamino)hexane 21.7 g (0,055 mol), water Take 4.4 g of sodium oxide and 100 - of xylene and 80
The mixture was stirred at ℃ for 8 hours. 7.2 g (0.05 mol) of N-(3-aminopropyl)morpholine and 2.0 g of sodium hydroxide were added thereto, and the mixture was stirred under reflux for 15 hours.

After washing with water and drying, the solvent was removed to obtain a pale yellow solid product with a molecular weight of about 2000 [Compound-2 represented by the following formula (N=19.3
%, Cl-0.18%)] was obtained.

Synthesis Examples 3 to 12 Compound dynamic magnets 3 to 12 represented by the following formulas were synthesized in the same manner as in Synthesis Example 1 or 2. In addition, in the following formula, (HDA)
, (ODA), (UDA), 0'IHDA), and (8HD^) are as follows, respectively.

II H HH HlI C113Cl13 O=COCOC an, co.

Compound dynamic magnetism 3 Compound dynamic magnetism 7 Compound level 8 Compound level IO Compound-11 Compound level 12 The present invention adds a compound represented by the general formula (+) to a polymeric material to particularly improve its light resistance. It is a thing,
The amount added is usually 0.001 to 5 parts by weight, preferably 0.01 to 3 parts by weight per 100 ffi parts 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-maleic anhydride terpolymer, vinyl chloride-styrene-acrylonitrile copolymer, vinyl chloride-butadiene copolymer, vinyl chloride-isoprene copolymer, vinyl chloride-chlorinated propylene copolymer, vinyl chloride- Vinylidene chloride-vinyl acetate terpolymer, vinyl chloride-acrylic acid ester copolymer, vinyl chloride-maleic acid ester copolymer, vinyl chloride-methacrylic acid ester copolymer, vinyl chloride-
Acrylonitrile copolymers, halogen-containing synthetic resins such as internally plasticized polyvinyl chloride, petroleum resins, coumaron resins, polystyrene, polyvinyl acetate, acrylic resins, styrene and other monomers (e.g. maleic anhydride, butadiene, acrylonitrile, etc.) ) copolymer with acrylonitrile-
Butadiene-styrene copolymer, acrylic ester-
Butadiene-styrene copolymer, methacrylic acid ester-butadiene-styrene copolymer, methacrylate resin such as polymethyl methacrylate, polyvinyl alcohol, polyvinyl formal, polyvinyl butyral, linear polyester, polyphenylene oxide, polyamide,
Examples include polycarbonate, polyacetal, polyurethane, cellulose resin, phenol resin, urea resin, melamine resin, epoxy resin, unsaturated polyester resin, and silicone resin. Furthermore, rubbers such as isoprene rubber, butadiene rubber, acrylonitrile-butadiene copolymer rubber, styrene-butadiene copolymer rubber, and 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 phenolic antioxidant to the composition of the present invention, its oxidative stability can be further improved. As this phenolic antioxidant, for example, 2
, 6-di-tert-butyl-p-cresol, 2,6-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-hydroxybenzylphosphonate, 2.4.6-)lis(3',5'
-tert-butyl-4-hydroxyhensylthio)1.
3,5. -) riazine, distearyl (4-hydroxy-3-methyl-5=tert-butyl)benzylmalonate,
2.2'-methylenebis(4-methyl-6-tert-butylphenol), 4.4'-methylenebis(2,6-di-tert-butylphenol), 2,2°-methylenebis(6-tert-butylphenol)
-(I-methylcyclohexyl)p-cresol], bis[3,5-bis(4-hydroxy-3-tert-butylphenyl)butyric acidocoglycol ester, 4.
4'-Butylidenebis (6-tert-butyl-m-cresol), 2.2'-ethylidenebis (4,6-di-tert-butylphenol), 2.2'-ethylidenebis (4-tert-butyl-6 -tertiary butylphenol), 1.1°3-
Tris (2-methyl-4-hydroxy-5-tert-butylphenyl)butane, bis[2-tert-butyl-4-methyl-6-(2-hydroxo-3-tert-butyl-5-methylbenzyl)phenyl] Terephthalate, 1,3.5-
1-Lis(2,6-dimethyl-3-hydroxy-4-tert-butyl)hensyl isocyanurate, 1.3.5-)
Lis(3゜5-di-tert-butyl-4-hydroquinhensyl)-2,4,6-)limethylhenzene, tetrakis[
Methylene-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate comethane, 1.3.5-
Tris(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-hydroxy-3,5-di-tert.
butyl) phenoxy-1,3,5-4 riazine, 4゜4
Examples include ゛-thiohy-su(6-tert-butyl-m-cresol).

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 further adding a phosphorus-containing compound such as phosphite to the composition of the present invention, its 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, distearylpentaerythritol diphosphite, tetra(tridecyl)-1,1,3-
Tris(2-methyl-5-tert-butyl-4-hydroxyphenyl)butane diphosphite, tetra(C52-1
．． mixed alkyl)-4,4'-isopropylidene diphenyl diphosphite, tetra(tridecyl)-4,4
'-Butylidenebis(3-methyl-6-tert-butylphenol) diphosphite, tris(3,5-di-tert-butyl-4-hydroxyphenyl) phosphite, tris(mono-dimixed nonylphenyl) phosphite, hydrogenated -4,4°-isopropylidene diphenol polyphosphite, bis(octylphenyl) bis[4,4°-
Butylidenehis (3-methyl-6-tert-butylphenol)] ・1,6-hexanediol diphosphite,
Phenyl・4,4°-isopropylidenediphenol・
Pentaerythritol diphosphite, bis(2,4-
Bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite, tris(4,4'-isopropylidene bis(2-tert-butyl) phenol)] phosphite, phenyl diisodecyl phosphite, di(nonylphenyl) pentaerythritol diphosphite, tris(I,3-di-stearoyloxyisopropyl) phosphite, 4.4°-isopropylidene bis(2-st) 3-butylphenol) di(nonylphenyl) phosphite, 9.10-di-hydro-9-oxa-10-phosphaphenanthrene-1O-oxide, tetrakis(2,4-di-tert-butylphenyl)-4 , 4'-biphenylene diphosphonite and the like.

By adding other light stabilizers to the compositions of the invention, their lightfastness can be further improved. Examples of the light stabilizer include 2-hydroxy-4-methoxyhensiphenone, 2-hydroquine-4-n-octoxyhensiphenone, 2゜2゛-di-hydroxy-4-methoxyhensiphenone, Hydroxybenzophenones such as 2.4-dihydroxyhensiphenone, 2-(2°-hydroxy-3°-t-butyl-5′-methylphenyl)-
5-chlorohencytriazole, 2-(2'-hydroxy-3', 5'-di-t-butylphenyl)-5-chlorohencytriazole, 2-(2'-hydroxy-5
゛-Methylphenyl)benzotriazole, 2-(2'
-Hydroxy-3゛5''-di-t-amylphenyl)
Benzotriazoles such as benzotriazole, phenyl salicylate, pt-butylphenyl salicylate, 2,4-di-t-butylphenyl-3,5-di-t-
Butyl-4-hydroxybenzoate, hexadecyl-
Benzony such as 3,5-di-t-butyl-4-hydroxybenzoate) 1.2°2°-thiobis(4-t-octylphenol)Ni salt, (2,2'-thiobis(4
-t-octylphenolate)]-]N-butylamine Ni, (3゜5-di-t-butyl-4-hydroxybenzyl)phosphonic acid monoethyl ester Ni salt, etc., nickel compounds, -Methyl-β-p-methoxyphenyl) acrylics Substituted acrylonitrile such as methyl 1 and N-2-ethylphenyl-N-2-ethoxy-5-tert-butylphenyl oxalic acid diamide, N-
Examples include oxalic dianilides such as 2-ethylphenyl-N-2-ethoxyphenyl oxalic 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, and the like.

The polymeric materials stabilized according to the invention can be used in a wide variety of forms, for example as films, fibers, tapes, sheets, various molded products, and also as paints, binders for lacquers, adhesives, putties, etc. It can also be used as a base material in photographic materials.

〔Example〕

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 Propionate stabilizer (see Table-1) 0.3 A press sheet with a thickness of 0.3 mm was created with the above blend,
A light resistance test was conducted on this sheet using a high-pressure mercury lamp. Further, a light resistance test was also conducted on the sheet after being immersed in hot water at 80° C. for 15 hours. Table 1 shows the results.
Shown below.

Table 1 Example 2 It is known that ordinary stabilizers lose their effectiveness significantly due to volatilization, decomposition, etc. during high-temperature processing of resins.

In this example, the influence of high temperature processing was confirmed by repeatedly performing extrusion processing.

After mixing the resin and additives in a mixer for 5 minutes according to the following formulation, a combination was created using an extruder (cylinder temperature 230°C, 240°C, head die temperature 250°C,
Rotation speed: 20 rpm). After extrusion was repeated 5 times, test pieces were made using this combination using an injection molding machine (cylinder temperature 240°C, nozzle temperature 250°C, injection pressure 475 kg/cd).

A light resistance test was conducted using the obtained test piece using a high-pressure mercury lamp. In addition, the same test was conducted for a sample that had been extruded once. The results are shown in Table-2.

Blend> Ethylene-propylene copolymer resin 100 parts by weight Calcium stearate 0.2 Phenylpropionate dilauryl thiodipropione) 0.2 Stabilizer (
(See Table 2) 0.2 Table 2 Example 3 Formulation> Polyethylene 100 parts by weight Ca-stearate 1.0 Bionate] Methanedistearylthiodipropionate 0.3 Stabilizer (Table -
3) 0.2 The above blend was mixed and pressed to form a sheet with a thickness of 0.5 ms. 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-3.

Table 3 Example 4 <Formulation> ABS resin 100 parts by weight 4.4'-butylidene bis(2-0.13-butyl-M-
Cresol) Stabilizer (see Table 4) 0.3 The above mixture was kneaded with a roll and then pressed to a thickness of 3Il111.
A sheet was created. This sheet was irradiated for 800 hours using a weatherometer, and the residual tensile strength after irradiation was measured. The results are shown in Table 4.

Table 4 Example 5 <Blend> Polyvinyl chloride 10,000 parts by weight Dioctyl slate 48 Epoxidized soybean oil
2-trisnonylphenyl phosphite
0.2 Ca-stearate 1.0 Zn-stearate 0.1 Stabilizer (see Table 5) 0.2 The above blend was kneaded on a kneading roll to create a sheet with a thickness of 11. A light resistance test in a weather offter was conducted using this sheet. The results are shown in Table-5.

Table-5 Example 6 <Formulation> Ba-stearate 0,7Zn-stearate 0.3 2.6-di-tert-butyl-p-cresol O0l stabilizer (see Table-6) 0.3 Above formulation was kneaded on a roll for 5 minutes at 70°C, and
A sheet with a thickness of 0.51 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-6.

Table 6 Example 7 The compounds of the present invention are also useful as light stabilizers 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 66g1 2-hydroxyethyl methacrylate 30g1
Take 4 g of methacrylic acid, 80 g of xylene and 20 g of n-butanol, heat to 110°C and add 2 g of azobisisobutyronitrile and 0.5 g of dodecyl mercaptan while stirring.
, a solution consisting of 80 g of xylene and 20 g of n-butanol was added dropwise over 3 hours. After that, stir at the same temperature for 2 hours,
An acrylic resin solution having a resin solid content of 50% was prepared.

12 parts by weight of the above acrylic resin solution, 2.5 parts by weight of butoxylated methylolmelamine (manufactured by Mikata Toatsu Co., Ltd.; Kneepan 203E60; resin solid content 60%), 50 parts by weight of cellulose acetate butyrate resin (20% butyl acetate solution) Department,
5.5 parts by weight of aluminum pigment (manufactured by Toyo Aluminum Co., Ltd.: Alpaste 1123N), 1210 parts by weight of Xylene, 20 parts by weight of butyl acetate, and 0.2 parts by weight of copper phthalocyanine blue.
The weight part was taken and used as a base coat paint.

b)) Tubu 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, and stabilizer (see Table 7)
0.15 parts by weight (0.5% based on solid content) was taken and used as a top coat paint.

A base coat paint was sprayed on the steel plate treated with the brimer so that the dry film thickness was 20 μm, and after being left for 10 minutes, a top coat paint was sprayed so that the dry film thickness was 30 μm. After leaving it for 15 minutes, it was baked at 140° 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 7.

Table 7 [Effects of the invention] The polymer material composition of the present invention has heat resistance,
It is made by adding a compound with extremely high extraction resistance and light stabilizing ability as a stabilizer, and has particularly excellent light resistance, and does not lose its excellent light resistance even when processed at high temperatures. (, held for a long time.

Claims (1)

[Scope of Claim] A stabilized polymeric material composition comprising 0.001 to 5 parts by weight of a compound represented by the following general formula (I) added to 100 parts by weight of a polymeric material. ▲There are mathematical formulas, chemical formulas, tables, etc.▼(I) (In the formula, A is a chlorine atom, a group represented by There are chemical formulas, tables, etc. ▼, C represents a chlorine atom or a group represented by X. R_1 represents ▲ There are mathematical formulas, tables, etc. R_2 represents an alkylene group having 2 to 20 carbon atoms.
_4 and R_5 are each a hydrogen atom, a methyl group, a benzyl group, -C_mH_2_m-OH or -COOR_7
, m represents 1 to 3, and R_7 represents an alkyl group. R_6 represents a bond or an alkylene group having 1 to 6 carbon atoms. Y_1 represents ▲There are mathematical formulas, chemical formulas, tables, etc.▼ or ▲There are mathematical formulas, chemical formulas, tables, etc.▼, Y_2 represents the group represented by Y_1 or -O-, and p represents 0 to 2. n represents 2 to 30. )