JP5262344B2 - Aliphatic-alicyclic copolymer petroleum resin composition and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aliphatic-alicyclic copolymer petroleum resin composition having excellent preservation stability, especially the one hardly forming a gel-shaped material and causing little change of resin properties with time at the preservation, and to provide a method for producing the resin composition. <P>SOLUTION: The aliphatic-alicyclic copolymer petroleum resin composition contains 0.05-2 pts.wt. hindered amine compound based on 100 pts.wt. aliphatic-alicyclic copolymer petroleum resin having &le;13% olefinic double bond-hydrogen area rate in a proton NMR spectrum. The method for producing the resin composition is also provided. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an aliphatic-alicyclic copolymer petroleum resin composition that does not produce a gel-like substance during polymerization or storage and is excellent in storage stability, and a method for producing the same.

  A method for producing a petroleum resin by polymerizing in the presence of a Friedel-Crafts catalyst using an unsaturated hydrocarbon-containing fraction obtained in the cracking and refining of petroleum as a raw material is well known. There are two types of hydrocarbon-containing fractions: a C5 fraction having a boiling range of 20 to 110 ° C. and a C9 fraction having a boiling range of 140 to 280 ° C. An aliphatic petroleum resin obtained from the C5 fraction, C9 fraction And an aliphatic petroleum copolymer resin obtained by copolymerizing a C5 fraction and a C9 fraction. An alicyclic petroleum resin obtained by thermally polymerizing dicyclopentadiene is also known.

  Dicyclopentadiene such as dicyclopentadiene, methyldicyclopentadiene, dimethyldicyclopentadiene, etc., which is the raw material for this alicyclic petroleum resin, has an unsaturated bond in the resin when polymerized in the presence of Friedel-Crafts type catalyst. In a large amount, the hue of the resin deteriorates and gel formation occurs, resulting in a problem of deterioration in quality. For this reason, aliphatic petroleum resins, aromatic petroleum resins and aliphatic aromatic copolymer petroleum resins are generally produced from fractions obtained by removing dicyclopentadiene by distillation or the like.

  On the other hand, a method for producing a petroleum resin by polymerizing in the presence of a Friedel-Crafts catalyst using dicyclopentadiene as a raw material has been studied. A method of polymerizing 5 to 50% by weight of dicyclopentadiene with respect to 95 to 50% by weight of C5 fraction in the presence of a Friedel-Crafts type catalyst has been proposed (for example, see Patent Document 1). However, Patent Document 1 does not describe the addition of a hindered amine compound and the storage stability of the resulting petroleum resin. Furthermore, the petroleum resin obtained in Patent Document 1 has a molecular weight distribution of 4.3 or more, and particularly when dicyclopentadiene is 16% by weight or more, the weight average molecular weight (Mw) is 10,000 or more. When used, the compatibility is poor and white turbidity or phase separation occurs and becomes a problem. In addition, a method of producing a petroleum resin using boron trifluoride (gas) as a Friedel-Crafts type catalyst and methanol as a cocatalyst is known (for example, see Patent Document 2). However, Patent Document 2 does not describe the storage stability of the obtained petroleum resin. Further, boron trifluoride (gas) used in Patent Document 2 reacts with various inorganic compounds and organic compounds to easily form complex compounds, and generates intense white smoke in the air and is also a poison. Special attention is required.

  On the other hand, a method for improving the thermal stability and weather resistance by blending a hindered amine compound with petroleum resin has already been proposed (see, for example, Patent Document 3). However, this is only an effect on aliphatic petroleum resins, aromatic petroleum resins, and aliphatic aromatic copolymer petroleum resins, and alicyclic petroleum resins using dicyclopentadiene as a raw material are not described at all.

  In addition, a phenol-modified aromatic petroleum resin composition added with a hindered amine compound (see, for example, Patent Document 4) and an aliphatic aromatic copolymer petroleum resin (see, for example, Patent Document 5) have already been proposed. However, an aliphatic-alicyclic petroleum resin comprising a C5 fraction and dicyclopentadiene has not been reported.

JP-A-8-34824 (first page) JP 56-106912 A (first page) Japanese Patent Publication No. 3-35335 (first page) JP 2005-187735 A (first page) Japanese Patent Laying-Open No. 2006-028285 (first page)

  An object of the present invention is to provide an aliphatic-alicyclic copolymer petroleum resin composition having no gel-like substance during production or storage, excellent in storage stability, and advantageous in cost, and a method for producing the same. It is intended to do.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that a hindered amine compound is added to an aliphatic-alicyclic copolymer petroleum resin having an olefinic double bond hydrogen area ratio of a specific value or less. In order to complete the present invention, an aliphatic-alicyclic copolymer petroleum resin composition having excellent storage stability, containing no specific amount of gel during storage and having little change in physical properties over time, is found. It came.

That is, the present invention uses, as a raw material, a mixture consisting of 20 to 70% by weight of a C5 fraction having a boiling range of 20 to 110 ° C. and 80 to 30% by weight of dicyclopentadiene obtained by pyrolysis of petroleum. In addition, the proton NMR spectrum contains 0.05 to 2 parts by weight of a hindered amine compound with respect to 100 parts by weight of an aliphatic-alicyclic copolymer petroleum resin having an olefinic double bond hydrogen area ratio of 13% or less. The present invention relates to an aliphatic-alicyclic copolymer petroleum resin composition characterized by the above, and a method for producing the same.

  The aliphatic-alicyclic copolymer petroleum resin in the present invention has a spectrum observed when proton NMR is measured, and the olefinic double bond hydrogen area ratio observed at 4.5 to 6.0 ppm is 13%. It is as follows. When the area ratio of the olefinic double bond hydrogen exceeds 13%, the aliphatic-alicyclic copolymer petroleum resin already generates a gel-like substance immediately after production.

  In addition, an aliphatic-alicyclic copolymer having an aliphatic hydrogen area ratio of 1.5 to 3.0% observed in the vicinity of 0 to 1.1 ppm of the proton NMR spectrum with respect to the olefinic double bond hydrogen. Petroleum resins are preferred because they are excellent in compatibility with rubber and EVA.

  The raw material oil for obtaining the aliphatic-alicyclic copolymer petroleum resin in the present invention is not particularly limited, and is obtained by pyrolysis of petroleum, C5 fraction having a boiling range of 20 to 110 ° C., and dicyclopentadiene. It is preferable to use a mixture of these as a raw material oil.

  The component constituting the C5 fraction is not particularly limited, and examples thereof include monoolefinic compounds having 4 to 6 carbon atoms such as 2-methyl-1-butene, 2-methyl-2-butene, 1-pentene, 2-pentene, and cyclopentene. Unsaturated hydrocarbons; linear dienes having 4 to 6 carbon atoms such as isoprene and piperylene; cyclopentadiens such as cyclopentadiene and methylcyclopentadiene; cyclopentane, 2-methylpentane, 3-methylpentane, n- Examples include aliphatic saturated hydrocarbons such as hexane.

  Examples of the dicyclopentadiene include dicyclopentadiene derivatives such as dicyclopentadiene, methyldicyclopentadiene, and dimethyldicyclopentadiene.

  In addition, when using the mixture which consists of C5 fraction and dicyclopentadiene in this invention as a raw material oil of aliphatic-alicyclic copolymerization petroleum resin, the mixing ratio of C5 fraction and dicyclopentadiene is obtained fat Since the aliphatic-alicyclic copolymer petroleum resin composition is excellent in softening point and hue, it is preferably 20 to 70% by weight of C5 fraction, and 80 to 30% by weight of dicyclopentadiene, more preferably C5. The fraction is 30 to 70% by weight and the dicyclopentadiene is 70 to 30% by weight.

Furthermore, when a mixture of C5 fraction and dicyclopentadiene is used as a raw material oil, the generation of gel-like substances in the resulting aliphatic-alicyclic copolymerized petroleum resin composition can be suppressed, so that the following general formula (1) The defined cyclopentadiene (CPD) content is preferably 10% by weight or less.
CPD content (% by weight) = (weight of cyclopentadiene in raw material oil + weight of methylcyclopentadiene) / (weight of hydrocarbon component having double bond in raw material oil) × 100 (1)
In addition, it does not specifically limit with the hydrocarbon component which has a double bond in feedstock here, As a typical example, the C4-C6 monoolefinic unsaturated hydrocarbons in the above-mentioned C5 fraction, Examples thereof include linear dienes having 4 to 6 carbon atoms, cyclopentadiene, and aliphatic saturated hydrocarbons.

  The production method of the aliphatic-alicyclic copolymer petroleum resin in the present invention is not particularly limited, and can be produced, for example, by adding a catalyst to a mixture of C5 fraction and dicyclopentadiene and heating to polymerize. As the catalyst used for the polymerization, a Friedel-Crafts type catalyst can be generally used, and examples thereof include aluminum trichloride, aluminum tribromide, boron trifluoride or a phenol complex thereof, butanol complex and the like. Among them, a phenol complex of boron trifluoride and a butanol complex of boron trifluoride are preferable. The polymerization temperature is preferably from 0 to 100 ° C, particularly preferably from 0 to 80 ° C. The amount of the catalyst and the polymerization time are, for example, 0.1 to 2.0 parts by weight of the catalyst for 0.1 to 10 hours with respect to 100 parts by weight of the mixture (raw material oil) composed of the C5 fraction and dicyclopentadiene. A range is preferred. The reaction pressure is preferably atmospheric pressure to 1 MPa.

  The aliphatic-alicyclic copolymer petroleum resin in the present invention preferably has a weight average molecular weight (Mw) of 500 to 5,000 from the viewpoint of processability.

  The hindered amine compound used in the present invention is not particularly limited as long as it is a compound belonging to the category referred to as a hindered amine compound, and among them, an aliphatic-alicyclic copolymer petroleum resin composition having particularly excellent storage stability is obtained. Therefore, a compound having a 2,2,6,6-tetraalkyl-4-piperidyl group represented by the following general formula is preferable.

ここで、一般式中のＲ１〜Ｒ４は互いに同一であっても相違していても良く炭素数１〜４のアルキル基であり、Ｒ５は水素又は置換基を持っていても良い炭素数１〜８のアルキル基もしくはアルコキシ基である。Ｒ１〜Ｒ４における炭素数１〜４のアルキル基としては、例えばメチル基、エチル基、プロピル基、ブチル基等が挙げられ、その中でもメチル基が好ましい。Ｒ５の置換基を持っていても良い炭素数１〜８のアルキル基としては、例えばメチル基、オクチル基等が挙げられ、置換基を持っていても良い炭素数１〜８のアルコキシ基としては、例えばメトキシ基、オクトキシ基等が挙げられる。これらの中でもＲ５としては、水素、メチル基、オクチル基等が好ましく、特に好ましくは水素、メチル基である。

Here, R1 to R4 in the general formula may be the same or different from each other and may be an alkyl group having 1 to 4 carbon atoms, and R5 may be hydrogen or a substituent having 1 to 1 carbon atoms. 8 is an alkyl group or an alkoxy group. As a C1-C4 alkyl group in R1-R4, a methyl group, an ethyl group, a propyl group, a butyl group etc. are mentioned, for example, Among these, a methyl group is preferable. As a C1-C8 alkyl group which may have a substituent of R5, a methyl group, an octyl group etc. are mentioned, for example, As a C1-C8 alkoxy group which may have a substituent, Examples thereof include a methoxy group and an octoxy group. Among these, as R5, hydrogen, a methyl group, an octyl group, etc. are preferable, Especially preferably, they are hydrogen and a methyl group.

  Examples of the compound having a 2,2,6,6-tetraalkyl-4-piperidyl group represented by a specific general formula include bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, Bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, tetrakis (2,2,6,6-tetramethyl-4-piperidyl) 1,2,3,4-butanetetracarboxylate, Tetrakis (1,2,2,6,6-pentamethyl-4-piperidyl) 1,2,3,4-butanetetracarboxylate, poly [{6- (1,1,3,3-tetramethylbutyl) amino -1,3,5-triazine-2,4-diyl} {(2,2,6,6-tetramethyl-4-piperidyl) imino} hexamethylene {(2,2,6,6-tetramethyl-4 -Piperidy ) Imino}] and the like, among which bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate and bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate preferable.

  A compound having a 2,2,6,6-tetraalkyl-4-piperidyl group represented by the general formula is known to have a molecular weight of 400 to 4,000, and Ciba Japan is used as a hindered amine light stabilizer (HALS). It is commercially available from KK and ADEKA, and these commercially available books can also be used in the present invention.

  The aliphatic-alicyclic copolymer petroleum resin composition of the present invention is 0.05-2 parts by weight of a hindered amine compound, preferably 0.1 parts per 100 parts by weight of the aliphatic-alicyclic copolymer petroleum resin. -1.0 weight part is contained. When the content of the hindered amine compound is less than 0.05 parts by weight, the storage stability of the resulting aliphatic-alicyclic copolymer petroleum resin composition is poor.

  The manufacturing method of the aliphatic-alicyclic copolymer petroleum resin composition of this invention mix | blends a hindered amine compound 0.03-2 weight part with respect to 100 weight part of aliphatic-alicyclic copolymer petroleum resin. Any method can be used if it is possible. Usually, an aliphatic-alicyclic copolymer petroleum resin is easily oxidized to form a peroxide even at room temperature, and when the aliphatic-alicyclic copolymer petroleum resin stored for a long time is heated and melted, the formed excess Oxide decomposition occurs, and it becomes easy to cause a change in the physical properties of the resin such as generation of a gel-like substance and softening point and hue. Therefore, in order to obtain an aliphatic-alicyclic copolymer petroleum resin composition having more excellent storage stability, a solvent or a low molecular compound that coexists after the polymerization reaction of the aliphatic-alicyclic copolymer petroleum resin is retained. A method of blending a melted hindered amine compound with an aliphatic-alicyclic copolymer petroleum resin in a molten state immediately after leaving is preferable. Furthermore, since the oxidation of the molten aliphatic-alicyclic copolymer petroleum resin, particularly oxidation by oxygen, can be prevented, the oxygen concentration in the blender during such blending is preferably 1000 ppm or less, more preferably 100 ppm or less, Especially preferably, it is 10 ppm or less.

  The aliphatic-alicyclic copolymer petroleum resin composition in the present invention is preferably 75 to 120 ° C., particularly preferably 85 to 110 ° C., and a hue of 10 or less, considering use in pressure-sensitive adhesive applications. Particularly preferably, it is 9 or less.

  In addition, the aliphatic-alicyclic copolymer petroleum resin composition of the present invention, as long as it does not deviate from the object of the present invention, usually includes, for example, a phenol-based antioxidant, phosphorus, and the like as additives added to the resin composition. -Based antioxidants, sulfur-based antioxidants, lactone-based antioxidants, ultraviolet absorbers, pigments, calcium carbonate, glass beads, and the like may be blended.

  As shown above, the aliphatic-alicyclic copolymer petroleum resin composition of the present invention is excellent in storage stability, in particular, there is no formation of a gel-like substance at the time of storage, and the change over time of the resin physical properties is small. It can be suitably used for applications such as hot melt adhesives, pressure sensitive adhesives, pressure-sensitive adhesive tapes, floor adhesives, and tires.

  EXAMPLES Hereinafter, although an Example demonstrates this invention, this invention does not receive a restriction | limiting at all by these Examples. In addition, the analysis of the raw material oil used in the Example and the comparative example, polymerization preparation amount and CPD content rate, an additive, and the obtained composition and a test method are as follows.

1. Raw material (1) C5 fraction, composition of dicyclopentadiene: Table 1, Table 2
(2) Additive:
Hindered amine compound: ADK STAB light stabilizer LA-77 (manufactured by ADEKA, bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate)
Phenol antioxidant: IRGANOX1010 (Ciba Japan Co., Ltd.)
(3) Type of raw material oil and polymerization charge, CPD content, type and amount of additive: Table 3

２．分析方法
（１）原料油の各成分の含有量：ＪＩＳ Ｋ−０１１４（２０００年）に準拠してガスクロマトグラフ法を用いて分析した。
（２）重量平均分子量（Ｍｗ）：ポリスチレンを標準物質とし、ＪＩＳ Ｋ−０１２４（１９９４年）に準拠してゲル浸透クロマトグラフィーにより測定した。
（３）オレフィン性二重結合水素面積比率：脂肪族−脂環族共重合石油樹脂をクロロホルム−ｄ（和光純薬工業（株）製）に溶解させ、ＮＭＲ（核磁気共鳴スペクトル）測定装置（型番ＧＳＸ２７０、日本電子（株）製）により測定した。得られたスペクトルについて下記の計算式に基づき面積比率を求めた。

2. Analysis method (1) Content of each component of feedstock: Analysis was performed using a gas chromatograph method in accordance with JIS K-0114 (2000).
(2) Weight average molecular weight (Mw): Measured by gel permeation chromatography according to JIS K-0124 (1994) using polystyrene as a standard substance.
(3) Olefinic double bond hydrogen area ratio: Aliphatic-alicyclic copolymer petroleum resin is dissolved in chloroform-d (manufactured by Wako Pure Chemical Industries, Ltd.) and NMR (nuclear magnetic resonance spectrum) measuring device ( Model No. GSX270, manufactured by JEOL Ltd.). About the obtained spectrum, the area ratio was calculated | required based on the following formula.

Olefinic double bond hydrogen area ratio (%) = (olefinic double bond hydrogen peak area) / (total of all peak areas) × 100
Olefinic double bond hydrogen peak: 4.5-6.0 ppm
(4) Aliphatic hydrogen area ratio (%) = (aliphatic hydrogen peak area) / (olefinic double bond hydrogen peak area) × 100
Aliphatic hydrogen peak area: Area obtained by vertically dividing a peak around 0 to 1.1 ppm (minimum value) in the NMR spectrum of (3).
(5) Softening point: Measured by a method based on JIS K-2531 (1960) (ring and ball method).
(6) Hue: Measured according to ASTM D-1544-63T as a 50 wt% toluene solution.

3. Storage stability test method (1) Measurement of time-dependent change Aliphatic-alicyclic copolymer petroleum resin composition (10 g) was placed in an aging tester at 50 ° C., and samples were sampled at the initial stage and every two weeks thereafter, and toluene was not dissolved. Judgment of gel-like substance formation by a substance (gel substance generation time-dependent change) and changes in the physical properties of the softening point, hue, and weight average molecular weight (Mw) over time (time-dependent change in physical properties) were measured.
(2) Determination of gel-like substance production 5 g of toluene was dissolved in 5 g of toluene, and then transferred to a flat petri dish. If an unmelted material could be visually confirmed on the petri dish, the gel-like substance was generated. .

Example 1
A glass autoclave having an internal volume of 2 liters was charged with 250 g of a C5 fraction having the composition A shown in Table 1 obtained by decomposition of naphtha as a raw oil and 250 g of a dicyclopentadiene (DCPD) fraction having the composition shown in Table 2. (C5 fraction / dicyclopentadiene = 50/50 (% by weight)). Next, after cooling to 10 ° C. in a nitrogen atmosphere, boron trifluoride phenol complex (Stella Chemifa Co., Ltd.) is mixed from the mixture of C5 fraction and dicyclopentadiene as Friedel Crafts type catalyst. To 100 parts by weight of the raw material oil, 3.0 parts by weight was added and polymerized for 2 hours. Thereafter, the catalyst was removed with an aqueous caustic soda solution, and the unreacted oil in the oil phase was distilled to obtain an aliphatic-alicyclic copolymer petroleum resin. As a result of measuring proton NMR of the copolymerized petroleum resin, the olefinic double bond hydrogen area ratio was 10%.

  Furthermore, 0.2 parts by weight of a hindered amine compound (manufactured by ADEKA, trade name Adeka Stab Light Stabilizer LA-77) was added at 100 ° C. with respect to 100 parts by weight of the copolymer petroleum resin under a nitrogen stream having an oxygen concentration of 2 ppm. The mixture was blended under a stirring speed of 300 rpm to obtain an aliphatic-alicyclic copolymer petroleum resin composition.

  Table 4 shows the storage stability measurement results (softening point, hue, weight average molecular weight (Mw), gel-like substance) of the resulting aliphatic-alicyclic copolymer petroleum resin composition. The copolymerized petroleum resin composition did not produce a gel material over time and had good storage stability.

Examples 2-5
An aliphatic-alicyclic copolymer petroleum resin composition was obtained in the same manner as in Example 1 except that the amount of hindered amine compound added was as shown in Table 3.

  Table 4 shows the storage stability measurement results (softening point, hue, weight average molecular weight (Mw), gel-like substance) of the resulting aliphatic-alicyclic copolymer petroleum resin composition. The copolymerized petroleum resin composition did not produce a gel material over time and had good storage stability.

Examples 6 and 7
An aliphatic-alicyclic copolymer petroleum resin composition was obtained in the same manner as in Example 1 except that the composition and amount of the C5 fraction used as the raw material oil were as shown in Table 3.

  Table 4 shows the storage stability measurement results (softening point, hue, weight average molecular weight (Mw), gel-like substance) of the resulting aliphatic-alicyclic copolymer petroleum resin composition. The copolymerized petroleum resin composition did not produce a gel material over time and had good storage stability.

Example 8
Aliphatic fats at 35 ° C. in the same manner as in Example 1 except that 3.0 parts by weight of boron trifluoride butanol complex (Stella Chemifa Co., Ltd.) was used as a Friedel-Crafts catalyst. A cyclic copolymer petroleum resin composition was obtained. The olefinic double bond hydrogen area ratio of the aliphatic-alicyclic copolymer petroleum resin was 12%.

  Table 4 shows the storage stability measurement results (softening point, hue, weight average molecular weight (Mw), gel-like substance) of the resulting aliphatic-alicyclic copolymer petroleum resin composition. The copolymerized petroleum resin composition did not produce a gel material over time and had good storage stability.

比較例１
実施例１で得た脂肪族−脂環族共重合石油樹脂にヒンダードアミン化合物を添加しないで、脂肪族−脂環族共重合石油樹脂の貯蔵安定性を測定した。測定結果（軟化点、色相、重量平均分子量（Ｍｗ）、ゲル状物質）を表５に示した。該共重合石油樹脂は物性が経時的に変化し、ゲル状物質も経時的に生成し、貯蔵安定性が不良であった。

Comparative Example 1
The storage stability of the aliphatic-alicyclic copolymer petroleum resin was measured without adding a hindered amine compound to the aliphatic-alicyclic copolymer petroleum resin obtained in Example 1. The measurement results (softening point, hue, weight average molecular weight (Mw), gel substance) are shown in Table 5. The physical properties of the copolymerized petroleum resin changed with time, and a gel-like substance was formed with time, resulting in poor storage stability.

Comparative Example 2
Aliphatic-alicyclic ring in the same manner as described in Example 1 except that 0.2 part by weight of a phenolic antioxidant (Ciba Japan Co., Ltd., IRGANOX 1010) was blended instead of the hindered amine compound as an additive. A group-copolymerized petroleum resin composition was obtained.

  Table 5 shows the storage stability measurement results (softening point, hue, weight average molecular weight (Mw), gel-like substance) of the resulting aliphatic-alicyclic copolymer petroleum resin composition. The copolymerized petroleum resin composition changed in physical properties over time, and a gel-like substance was formed over time, resulting in poor storage stability.

Comparative Example 3
An aliphatic-alicyclic copolymer petroleum resin composition was obtained in the same manner as in Example 6 except that the composition and amount of the C5 fraction used as the raw material oil were as shown in Table 3. The olefinic double bond hydrogen area ratio of the aliphatic-aliphatic copolymerized petroleum resin was 15%.

  Table 5 shows the measurement results (softening point, hue, weight average molecular weight (Mw), gel substance) of the obtained aliphatic-alicyclic copolymer petroleum resin composition. The copolymerized petroleum resin was confirmed to produce a gel-like substance immediately after production, and could not be used as an aliphatic-alicyclic copolymerized petroleum resin composition.

Claims (3)

A mixture consisting of 20 to 70% by weight of a C5 fraction having a boiling range of 20 to 110 ° C. obtained by thermal decomposition of petroleum and 80 to 30% by weight of dicyclopentadiene is used as a raw material . An aliphatic containing 0.05 to 2 parts by weight of a hindered amine compound with respect to 100 parts by weight of an aliphatic-alicyclic copolymer petroleum resin having an olefinic double bond hydrogen area ratio of 13% or less -An alicyclic copolymer petroleum resin composition. A cyclopentadiene (CPD) content defined by the following general formula (1) of a feedstock composed of a mixture of a C5 fraction and a dicyclopentadiene having a boiling range of 20 to 110 ° C. is 10% by weight or less. The aliphatic-alicyclic copolymer petroleum resin composition according to claim 1.
CPD content (% by weight) = (weight of cyclopentadiene in raw material oil + weight of methylcyclopentadiene) / (weight of hydrocarbon component having double bond in raw material oil) × 100 (1) The method for producing an aliphatic-alicyclic copolymer petroleum resin composition according to claim 1 or 2, wherein the oxygen concentration in the blender when blending the hindered amine compound is 1000 ppm or less .