JPH0266499A - Neutron ray shielding material - Google Patents
Neutron ray shielding materialInfo
- Publication number
- JPH0266499A JPH0266499A JP63216297A JP21629788A JPH0266499A JP H0266499 A JPH0266499 A JP H0266499A JP 63216297 A JP63216297 A JP 63216297A JP 21629788 A JP21629788 A JP 21629788A JP H0266499 A JPH0266499 A JP H0266499A
- Authority
- JP
- Japan
- Prior art keywords
- parts
- weight
- manufactured
- phosphite
- antioxidant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 10
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 21
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229920005672 polyolefin resin Polymers 0.000 claims abstract description 20
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 17
- 239000002530 phenolic antioxidant Substances 0.000 claims abstract description 15
- 239000011358 absorbing material Substances 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 9
- -1 polypropylene Polymers 0.000 abstract description 7
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 abstract description 6
- 230000005855 radiation Effects 0.000 abstract description 5
- 229920001903 high density polyethylene Polymers 0.000 abstract description 4
- 239000004700 high-density polyethylene Substances 0.000 abstract description 4
- 229920001684 low density polyethylene Polymers 0.000 abstract description 3
- 239000004702 low-density polyethylene Substances 0.000 abstract description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 2
- 239000004743 Polypropylene Substances 0.000 abstract description 2
- 239000000654 additive Substances 0.000 abstract description 2
- 229920001577 copolymer Polymers 0.000 abstract description 2
- 229910052744 lithium Inorganic materials 0.000 abstract description 2
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 229920001155 polypropylene Polymers 0.000 abstract description 2
- 239000005977 Ethylene Substances 0.000 abstract 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 abstract 1
- 239000004327 boric acid Substances 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 abstract 1
- 229920005989 resin Polymers 0.000 description 24
- 239000011347 resin Substances 0.000 description 24
- 241000156978 Erebia Species 0.000 description 15
- 239000005038 ethylene vinyl acetate Substances 0.000 description 15
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 15
- 229910052810 boron oxide Inorganic materials 0.000 description 12
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 12
- 229920000092 linear low density polyethylene Polymers 0.000 description 9
- 239000004707 linear low-density polyethylene Substances 0.000 description 9
- 238000012545 processing Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 150000001639 boron compounds Chemical class 0.000 description 3
- 238000004040 coloring Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 150000002642 lithium compounds Chemical class 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 229910052793 cadmium Inorganic materials 0.000 description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 2
- 229910052808 lithium carbonate Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- XDVOLDOITVSJGL-UHFFFAOYSA-N 3,7-dihydroxy-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound O1B(O)OB2OB(O)OB1O2 XDVOLDOITVSJGL-UHFFFAOYSA-N 0.000 description 1
- SSADPHQCUURWSW-UHFFFAOYSA-N 3,9-bis(2,6-ditert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane Chemical compound CC(C)(C)C1=CC(C)=CC(C(C)(C)C)=C1OP1OCC2(COP(OC=3C(=CC(C)=CC=3C(C)(C)C)C(C)(C)C)OC2)CO1 SSADPHQCUURWSW-UHFFFAOYSA-N 0.000 description 1
- 229910052580 B4C Inorganic materials 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- ZDVYABSQRRRIOJ-UHFFFAOYSA-N boron;iron Chemical compound [Fe]#B ZDVYABSQRRRIOJ-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000001976 improved effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- VGTPKLINSHNZRD-UHFFFAOYSA-N oxoborinic acid Chemical compound OB=O VGTPKLINSHNZRD-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は成形加工性が容易で優れた外観を持ちつつ、中
性子線を吸収し、尚かつ二次放射線を発生しにくい、中
性子線吸収遮蔽材組成物に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a neutron beam absorption shield that is easy to mold, has an excellent appearance, absorbs neutron beams, and does not easily generate secondary radiation. The present invention relates to material compositions.
［従来の技術］
近年の原子力産業の発展に伴い、原子炉、高速増殖炉等
の原子力施設及び粒子加速器、核融合炉などから発生す
る中性子線の遮蔽は安全上重要な課題となっている。そ
こで、安全かつ確実な中性子線の遮蔽方法の開発が急が
れる。[Background Art] With the recent development of the nuclear power industry, shielding of neutron beams generated from nuclear facilities such as nuclear reactors and fast breeder reactors, particle accelerators, and nuclear fusion reactors has become an important safety issue. Therefore, there is an urgent need to develop a safe and reliable method for shielding neutron beams.
従来から使用されている放射線吸収材料としては、水１
重コンクリート、ポリエチレン樹脂などの水素含釘化合
物及び鉛、鉄、カドミウム、ホウ素、リチウムなどの金
属がある。この金属の中でも安価なため一般に使用され
てきた鉛、カドミウム等は中性子線に暴露されると強い
二次放射線を発生するため安全性の問題が指摘されてい
る。Conventionally used radiation absorbing materials include water 1
These include heavy concrete, hydrogen-containing nail compounds such as polyethylene resin, and metals such as lead, iron, cadmium, boron, and lithium. Among these metals, lead, cadmium, etc., which are commonly used because they are cheap, have been pointed out to be a safety problem because they generate strong secondary radiation when exposed to neutron beams.
このため二次放射線の発生が少なく安価でかつ成形加工
性が良好な中性子吸収材料として無機ホウ素化合物や無
機リチウム化合物等が用いられている。この無機ホウ素
化合物に代表される中性子吸収材料はポリオレフィン系
樹脂等の樹脂に配合混練して用いる場合が多いが、これ
らは多量に配合混練すると成形加工時に樹脂焼けを生じ
褐色に若色するという欠点を有しており、外観を損うと
いう問題があった。For this reason, inorganic boron compounds, inorganic lithium compounds, and the like are used as neutron absorbing materials that generate less secondary radiation, are inexpensive, and have good moldability. Neutron absorbing materials such as inorganic boron compounds are often mixed and kneaded with resins such as polyolefin resins, but these have the disadvantage that if they are mixed and kneaded in large quantities, the resin will burn during molding and the color will turn brown. There was a problem in that the appearance was impaired.
［発明が解決しようとする課題］
本発明は材料の特性を低下させる事なく、加工性に優れ
、従来発生していた成形加工時の樹脂焼けを生じずに外
観に優れた中性子線遮蔽材を提供する事を目的とする。[Problems to be Solved by the Invention] The present invention provides a neutron beam shielding material that does not deteriorate the properties of the material, has excellent workability, and has an excellent appearance without causing the conventional resin burn during molding. The purpose is to provide.
［課；ｊを解決するための手段］
上記のような現状に鑑み、本発明者らは鋭意検討を重ね
た結果、特定の酸化防止剤を添加す、ることにより樹脂
焼けを防止できることを見出だし本発明を完成するに至
った。[Means for solving Section; The present invention has been completed.
即ち本発明はポリオレフィン系樹脂１００重量部とフェ
ノール系酸化防止剤０．２〜５．０重工部とホスファイ
ト系酸化防止剤０．２〜５，０重量部とに対して中性子
線吸収材料１〜５００重量部を混合分散させてなること
を特徴とする中性子線遮蔽材に関する。That is, in the present invention, 1 part by weight of the neutron beam absorbing material is added to 100 parts by weight of the polyolefin resin, 0.2 to 5.0 parts by weight of the phenolic antioxidant, and 0.2 to 5.0 parts by weight of the phosphite antioxidant. The present invention relates to a neutron beam shielding material characterized in that it is made by mixing and dispersing up to 500 parts by weight.
以下本発明の詳細な説明する。The present invention will be explained in detail below.
本発明でいうポリオレフィン系樹脂とは高密度ポリエチ
レン、低密度ポリエチレン、直鎖状低密度ポリエチレン
等のポリエチレン、エチレン−酢酸ビニル共重合体、ポ
リプロピレン等のことであり、これらを（１１独もしく
は二種以上混合して用いる。水素の量が多いほど中性子
の遮蔽効果が向上するため、高密度ポリエチレン又は低
密度ポリエチレンを使用することが好ましい。その際、
成形加工性を改良するためエチレン−酢酸ビニル共重合
体等を加える場合には、その配合割合は、水素の含有量
と耐熱性の関係からポリオレフィン系樹脂の全重量に対
し、５０ｆｆ１部以下に押さえることが好ましい。In the present invention, the polyolefin resin refers to polyethylene such as high-density polyethylene, low-density polyethylene, and linear low-density polyethylene, ethylene-vinyl acetate copolymer, polypropylene, etc. A mixture of the above is used.The larger the amount of hydrogen, the better the neutron shielding effect, so it is preferable to use high-density polyethylene or low-density polyethylene.In that case,
When adding ethylene-vinyl acetate copolymer, etc. to improve moldability, the blending ratio should be kept to 50ff1 part or less based on the total weight of the polyolefin resin due to the relationship between hydrogen content and heat resistance. It is preferable.
本発明でいうフェノール系及びホスファイト系酸化防止
剤とは・、ポリオレフィン系樹脂の酸化防止に通常用い
られるフェノール系及びホスファイト系添加剤である。The phenolic and phosphite antioxidants referred to in the present invention are phenolic and phosphite additives that are commonly used to prevent the oxidation of polyolefin resins.
樹脂焼けによる着色を防止するためにはフェノール系と
ホスファイト系の二種類の酸化防止剤を同時に使用する
事が必要である。ポリオレフィン系樹脂１００重量部に
対するフェノール系酸化防止剤の配合割合は０．２〜５
．０重量部、又ホスファイト系酸化防止剤の配合割合は
０．２〜５．０重量部である。とりわけフェノール系酸
化防止剤、ホスファイト系酸化防止剤共に０．２８〜５
，０重量部を配合することが望ましい。ポリオレフィン
系樹脂１００重量部に対するフェノール系酸化防止剤の
配合割合が０．２重量部未満又はホスファイト系酸化防
止剤の配合割合が０． ２！ＪＩＬ量部未満の場合樹脂
焼けを防止する効果に劣る。In order to prevent discoloration due to resin burning, it is necessary to use two types of antioxidants, phenolic and phosphite, at the same time. The blending ratio of phenolic antioxidant to 100 parts by weight of polyolefin resin is 0.2 to 5.
．． 0 parts by weight, and the blending ratio of the phosphite antioxidant is 0.2 to 5.0 parts by weight. In particular, both phenolic antioxidants and phosphite antioxidants are 0.28 to 5.
, 0 parts by weight is desirable. The blending ratio of the phenolic antioxidant to 100 parts by weight of the polyolefin resin is less than 0.2 parts by weight, or the blending ratio of the phosphite antioxidant is 0.2 parts by weight. 2! If the amount is less than JIL parts, the effect of preventing resin burning is poor.
一方各々５．０重量部をこえて配合しても顕著な樹脂焼
は防止効果はみられない。On the other hand, even if more than 5.0 parts by weight of each is blended, no significant effect of preventing resin scorching is observed.
本発明に使用する中性子線吸収材料は、無機ホウ素酸化
合物、無機リチウム化合物等である。無機ホウ素化合物
としては例えば炭化ホウ素、窒化ホウ素、ホウ素鉄、灰
ホウ石、正ホウ素、メタホウ酸、四ホウ酸、酸化ホウ素
等を挙げることができ叉、無機リチウム化合物としては
例えば炭酸リチウム等を例示することができる。The neutron beam absorbing material used in the present invention is an inorganic boronic acid compound, an inorganic lithium compound, or the like. Examples of inorganic boron compounds include boron carbide, boron nitride, iron boron, perovskite, boron, metaboric acid, tetraboric acid, boron oxide, etc. Examples of inorganic lithium compounds include lithium carbonate. can do.
中性子線吸収材料の添加量は、使用する材料によって異
なるが、ポリオレフィン系樹脂１００重量部に対して１
〜５００重量部である。例えば、酸化ホウ素では１〜８
０重量部が好ましい。The amount of the neutron absorbing material added varies depending on the material used, but it is 1 part by weight per 100 parts by weight of the polyolefin resin.
~500 parts by weight. For example, for boron oxide, 1 to 8
0 parts by weight is preferred.
本発明の中性子線遮蔽材を製造する方法の一例を以下に
示す。An example of a method for manufacturing the neutron beam shielding material of the present invention is shown below.
たとえば、予め中性子線吸収材料とフェノール系酸化防
止剤とホスファイト系酸化防止剤とをポリオレフィン系
樹脂と共にリボンブレンダー或いはヘンシェルミキサー
等のトライブレンド装置を用いて予め分散させた後、押
出機又はバンバリーミキサ−等の溶融混練装置で一度ペ
レット化する。For example, a neutron beam absorbing material, a phenolic antioxidant, and a phosphite antioxidant are predispersed together with a polyolefin resin using a tri-blend device such as a ribbon blender or a Henschel mixer, and then the mixture is dispersed using an extruder or Banbury mixer. Pelletize once using a melt kneading device such as -.
このようにして得た中性子遮蔽材料ペレットは圧縮成形
機、射出成形機、押出成形機等の各種加工装置を用いて
所望の形状のものを得ることができる。The neutron shielding material pellets thus obtained can be shaped into desired shapes using various processing devices such as compression molding machines, injection molding machines, and extrusion molding machines.
［実施例］
以下実施例によって本発明を更に詳細に説明するが本発
明はこれらに限定されるものではない。[Examples] The present invention will be explained in more detail with reference to Examples below, but the present invention is not limited thereto.
実施例１ 直鎖状低密度ポリエチレン（東ソー（株）製。Example 1 Linear low-density polyethylene (manufactured by Tosoh Corporation).
商品名［ニポロン−ＬＪ 、Ｍ−５０）６０重量部とエ
チレン−酢酸ビニル共重合体（東ソー（株）製、商品名
ｒつ／Ｉｚ）ラセンＪ 、＋ ＥＶＡ ９２１０）４
０重量部と中性子線吸収材として酸化ホウ素（１１本電
工（株）製）８Ｃ）ｆｆｉｍ部とホスファイト系酸化防
止剤（アデカ・アーガス化学（株）製ＡＯ−１８）０．
２８重塁部とフェノール系酸化防止剤（アデカ・アーガ
ス化学（株）製、Ｐ、ＥＰ−３６）０．２８重量部とを
用いた。酸化ホウ素は予め１４０°Ｃ〜１５０℃のギア
オーブン中で４時間加熱脱水処理を施した。この酸化ホ
ウ素と、ホスファイト系酸化防止剤と、フエ／−ル系酸
化防止剤とエチレン−酢酸ビニル共重合体とを１１０℃
のオーブンロール中にて予備・？ｆ１．′ｓシた後ポリ
エチレンを添加して１４０℃〜１５０℃のオーブンロー
ル中にて５分間混練し、シート状の成形体を得た。ここ
で得たシート状成形体を１９０°Ｃに保ったギアオーブ
ン中に放置し、樹脂焼けが生じるかどうか経時的な変化
を試験した結果、９００分経過後も殆ど着色しないこと
を確認した。60 parts by weight of product name [Nipolon-LJ, M-50] and ethylene-vinyl acetate copolymer (manufactured by Tosoh Corporation, product name r/Iz) Rasen J, + EVA 9210) 4
0 parts by weight of boron oxide (8C, manufactured by Hondenko Co., Ltd.) as a neutron beam absorbing material, and 0.0 parts of phosphite-based antioxidant (AO-18, manufactured by Adeka Argus Chemical Co., Ltd.).
28 parts by weight and 0.28 parts by weight of a phenolic antioxidant (manufactured by Adeka Argus Chemical Co., Ltd., P, EP-36) were used. The boron oxide was previously heated and dehydrated in a gear oven at 140°C to 150°C for 4 hours. This boron oxide, a phosphite-based antioxidant, a phenol-based antioxidant, and an ethylene-vinyl acetate copolymer were heated at 110°C.
Reserved in the oven roll? f1. After boiling, polyethylene was added and kneaded for 5 minutes in an oven roll at 140°C to 150°C to obtain a sheet-like molded product. The sheet-like molded product obtained here was left in a gear oven maintained at 190°C, and as a result of testing for changes over time to see if resin burn occurred, it was confirmed that there was almost no coloring even after 900 minutes.
実施例２
高密度ポリエチレン（東ソー（株）製、商品名「ニポロ
ンハードＪ、５６００）６０重量部とエチレン−酢酸ビ
ニル共重合体（東ソー（株）製。Example 2 60 parts by weight of high-density polyethylene (trade name: Nipolon Hard J, 5600, manufactured by Tosoh Corporation) and ethylene-vinyl acetate copolymer (manufactured by Tosoh Corporation).
商品名「ウルトラセンＪ、ＥＶＡ＝９２１０）４０重量
部、と酸化ホウ素（日本電工（株）製）８０重量部とホ
スファイト系酸化防止剤（アデカ・アーガス化学（株）
製、ＡＯ−１８）０．２８ｆｆｆ ｍ部とフェノール系
酸化防止剤（アデカ・アーガス化学（株）製、ＰＥＴ−
３６）０．２８重量部とを用いる。実施例１と同様の加
工を行った後、１９み５ＩＩＩ１１の板状の成形品を得
た。この時、樹脂焼けは生じなかった。又、この板を１
９０℃に保ったギアオーブン中に放置し、樹脂焼けが生
じるかどうか経時的な変化を試験した結果、９００分経
過後にも殆ど着色しないことを確認した。Product name: 40 parts by weight of Ultrasen J, EVA=9210, 80 parts by weight of boron oxide (manufactured by Nippon Denko Corporation), and phosphite antioxidant (manufactured by Adeka Argus Chemical Co., Ltd.)
(manufactured by Adeka Argus Chemical Co., Ltd., AO-18) and 0.28 fff m part of phenolic antioxidant (manufactured by Adeka Argus Chemical Co., Ltd., PET-
36) Use 0.28 parts by weight. After performing the same processing as in Example 1, a plate-shaped molded product of 19 mm 5III11 was obtained. At this time, no resin burn occurred. Also, this board is 1
As a result of leaving it in a gear oven kept at 90° C. and testing for changes over time to see if resin burn occurred, it was confirmed that there was almost no coloring even after 900 minutes had elapsed.
実施例３
ポリオレフィン系樹脂として直鎖状低密度ポリエチレン
（東ソー（株）製商品名「ニポロンーし」Ｍ−５０）６
０１１ｆｆ１部とエチレン−酢酸ビニル共重合体（東ソ
ー（株）製、商品名「ウルトラセ＞ Ｊ 、 Ｅ Ｖ
Ａ −９２１０） ４０重量部と酸化ホウ素（日本電
工（株）製）８０重量部とホスファイ！・系酸化防止剤
（アデカ・アーガス化学（味）製。Example 3 Linear low-density polyethylene (trade name "Nipolonushi" M-50 manufactured by Tosoh Corporation) 6 as a polyolefin resin
1 part of 011ff and ethylene-vinyl acetate copolymer (manufactured by Tosoh Corporation, trade name: ``Ultrace> J, EV
A-9210) 40 parts by weight, 80 parts by weight of boron oxide (manufactured by Nippon Denko Corporation), and phosphite! - Antioxidant (manufactured by Adeka Argus Chemical (Aji)).
ＡＯ−１８）０．２８重量部とフェノール系酸化防止剤
（アデカ・アーガス化学（株）製ＰＥＰ−８）０．２８
重量部とを用いる。実施例１と同様の加工を行って、厚
み５ ｍｍの板状の成形品を得た。AO-18) 0.28 parts by weight and phenolic antioxidant (PEP-8 manufactured by Adeka Argus Chemical Co., Ltd.) 0.28
Parts by weight are used. The same processing as in Example 1 was performed to obtain a plate-shaped molded product with a thickness of 5 mm.
この時樹脂焼けは生じなかった。又この板を１９０℃に
保ったギアオーブン中に放置し、樹脂焼けが生じるかど
うか経時的な変化を実験した結果、９００分経過後にも
殆ど着色しないことを確認した。At this time, no resin burn occurred. Furthermore, this board was left in a gear oven kept at 190° C., and an experiment was conducted to determine whether or not resin burn occurred over time. As a result, it was confirmed that almost no coloring occurred even after 900 minutes had elapsed.
実施例４
直鎖状低密度ポリエチレン（東ソー（株）製、商品名［
ニポロン−ＬＪ、Ｍ−５０）６０重量部と、エチレン−
酢酸ビニル共重合体（東ソー（株）製、商品名「ウルト
ラセ＞Ｊ 、ＥＶＡ−９２１０）４０重量部と酸化ホウ
素（日本電工（株）製）８０重量部とホスファイト系酸
化防止剤（アデカ・アーガス化学（株）製、ＡＯ−１８
）０．２８重量部とフェノール系酸化防止剤（アデカ・
アーガス化学（昧）製ＰＥＰ−２４Ｇ）０．２８重量部
とを用い、実施例１と同様の加工を行って、厚み５ ｍ
ｍの板状の成形品を得た。この時樹脂焼けは生じなかっ
た。又この仮を１９０℃に保ったギヤオーブン中に放置
し、樹脂焼けが生じるかどうか経時的な変化を実験した
結果、９００分経過後にも殆ど６色しないことを確認し
た。Example 4 Linear low-density polyethylene (manufactured by Tosoh Corporation, trade name [
Nipolon-LJ, M-50) 60 parts by weight and ethylene-
40 parts by weight of vinyl acetate copolymer (manufactured by Tosoh Corporation, trade name: "Ultrace>J, EVA-9210"), 80 parts by weight of boron oxide (manufactured by Nippon Denko Corporation), and a phosphite-based antioxidant (Adeka Co., Ltd.). Manufactured by Argus Chemical Co., Ltd., AO-18
)0.28 parts by weight and phenolic antioxidant (ADEKA・
Using 0.28 parts by weight of PEP-24G (manufactured by Argus Chemical), the same processing as in Example 1 was performed to obtain a thickness of 5 m.
A plate-shaped molded product of m was obtained. At this time, no resin burn occurred. Furthermore, this sample was left in a gear oven maintained at 190° C., and an experiment was conducted to determine whether or not resin burn occurred over time. As a result, it was confirmed that almost no six colors were observed even after 900 minutes had elapsed.
実施例５
ポリオレフィン系樹脂として直鎖状低密度ポリエチレン
（東ソー（株）製、商品名「ニポロンーＬＪ Ｍ−５０
）６０重量部と、エチレン−酢酸ビニル共重合体（東ソ
ー（株）製、商品名「ウルトラセンＪ、ＥＶＡ−９２１
０）４０重量部と炭酸リチウム５０重量部とホスファイ
ト系酸化防止剤（アデカ・アーガス化学（株）製、ＰＥ
Ｐ−３６）０．２８！ｌｒｒｍ部とフェノール系酸化防
止剤（アデカ・アーガス化学（株）製ＡＯ−１８）０．
２８重量部とを用いた。実施例１と同様の加工を行い、
厚み５ ｍｍの板状の成形品をｉすた。この時樹脂焼け
によるむ色は見られなかった。又、この板を１９０°Ｃ
ギヤオーブン中で経時変化試験した結果、樹脂焼けによ
り着色しないことを確認した。Example 5 Linear low-density polyethylene (manufactured by Tosoh Corporation, trade name: "Nipolon-LJ M-50") was used as the polyolefin resin.
), 60 parts by weight of ethylene-vinyl acetate copolymer (manufactured by Tosoh Corporation, trade name: "Ultracene J, EVA-921")
0) 40 parts by weight, 50 parts by weight of lithium carbonate, and a phosphite-based antioxidant (manufactured by Adeka Argus Chemical Co., Ltd., PE
P-36) 0.28! lrrm part and phenolic antioxidant (AO-18 manufactured by Adeka Argus Chemical Co., Ltd.) 0.
28 parts by weight was used. Perform the same processing as in Example 1,
A plate-shaped molded product with a thickness of 5 mm was prepared. At this time, no color was observed due to resin burning. Also, heat this board to 190°C
As a result of an aging test in a gear oven, it was confirmed that there was no coloration due to resin burning.
比較例１
ポリオレフィン系樹脂として直鎖状低密度ポリエチレン
（東ソー（株）装面品名ｒ ＝ ホロン−ＬＪＭ −５
０） ６０１ｆｆｉＨ部とエチレン−酢酸ビニル共重合
体（東ソー（珠）製１商品名「ウルトラセンＪ、ＥＶＡ
−９２１０）４０重二部と酸化ホウ素（１：Ｊ本電工（
株）製）８０重量部とを用いた。Comparative Example 1 Linear low-density polyethylene (Tosoh Corporation) mounting product name r = Holon-LJM-5 as polyolefin resin
0) 601ffiH part and ethylene-vinyl acetate copolymer (manufactured by Tosoh (Tama) 1 product name "Ultrasen J, EVA
-9210) 40 parts and boron oxide (1: J Hondenko (
80 parts by weight (manufactured by Co., Ltd.) was used.
酸化防止剤を配合しない他は実施例１と同様の加工を行
い厚み５關の板状の成形品を得た。この時既に樹脂焼け
により淡黄色に変色していた。又、この阪を１９０℃に
保ったギヤオーブン中に放置して樹脂焼が生じる過程を
試験したところ試験開始後６０分程度までは淡黄色化で
あったが、それ以降徐々に着色しはじめ淡黄色から褐色
へと変化した。A plate-shaped molded product with a thickness of 5 mm was obtained by carrying out the same processing as in Example 1, except that no antioxidant was added. At this time, the resin had already turned pale yellow due to burnt resin. In addition, when we tested the process of resin burning by leaving this plastic in a gear oven kept at 190℃, it turned pale yellow for about 60 minutes after the start of the test, but after that, it gradually started to change color and became pale. The color changed from yellow to brown.
比較例２
ポリオレフィン系樹脂として直鎖状低密度ポリエチレン
（東ソー（株）装面品名「ニポロンーＬ」Ｍ−５０’）
６０重量部とエチレン−酢酸ビニル共重合体（東ソー（
株）製、商品名「ウルトラセンＪ 、ＥＶＡ−９２１０
）４０ｆｆｉ量部と酸化ホウ素（日本電工（株）製）８
０重量部とホスファイト系酸化防止剤（アデカ・アーガ
ス化学（株）製ＡＯ−１８）０．１ｆｆｌ量部それにフ
ェノール系酸化防止剤（アデカ・アーガス化学（株）製
ＰＥＰ３６）０．１重量部とを用いた。実施例１と同様
の加工を行って厚み５鴫の板状の成形品を１１だ。Comparative Example 2 Linear low-density polyethylene (Tosoh Corporation, mounting product name "Nipolon-L"M-50') as polyolefin resin
60 parts by weight and ethylene-vinyl acetate copolymer (Tosoh)
Co., Ltd., product name: “Ultrasen J, EVA-9210”
) 40ffi parts and boron oxide (manufactured by Nippon Denko Corporation) 8
0 part by weight, 0.1 ffl part of phosphite antioxidant (AO-18 manufactured by Adeka Argus Chemical Co., Ltd.), and 0.1 part by weight of phenolic antioxidant (PEP36 manufactured by Adeka Argus Chemical Co., Ltd.) and was used. The same processing as in Example 1 was carried out to produce a plate-shaped molded product with a thickness of 5 mm.
この時樹脂焼けは生じなかった。又この仮を１９０℃に
保ったギヤオーブン中に放置し樹脂焼けの生じる過程を
試験したところ試験開始後１２０分捏度で淡黄色化に変
色し、それ以後徐々に青色が進み、９００分後には薄褐
色になった。At this time, no resin burn occurred. In addition, this sample was left in a gear oven kept at 190°C to test the process of resin burning. After 120 minutes from the start of the test, the color changed to pale yellow, after which the color gradually progressed to blue, and after 900 minutes. turned light brown.
比較例３ ・−ポリ
オレフィン系樹脂として直鎖状低密度ポリエチレン（東
ソー（株）製、商品名「ニボロンーＬＪ 、Ｍ−５０）
６０！Ｉｉ′量部とエチレン−酢酸ビニル共重合体（東
ソーＣＦ’Ｊｉ、）装面品名［ウルトラセンＪ、ＥＶＡ
９２１０１４０重量部と酸化ホウ素（日本電工（味
）製）８０重量部とホスファ・ｒｌ・系酸化防止剤（ア
デカ・アーガス化学（株）製ＡＯ−１８）０．２８重量
部とを用い、実施例１と同様の加工を行い、厚み５關の
板状の成形品をｆｊＩた。この時樹脂焼けにより淡黄色
に着色しており、更にこの仮の１９０℃ギヤオーブン中
の経時変化試験においては徐々に淡黄色から黄色へと変
化した。Comparative Example 3 - Linear low-density polyethylene (manufactured by Tosoh Corporation, product name "Niboron-LJ, M-50") as polyolefin resin
60! Parts of Ii' and ethylene-vinyl acetate copolymer (Tosoh CF'Ji) mounting product name [Ultracene J, EVA
Example using 140 parts by weight of 9210, 80 parts by weight of boron oxide (manufactured by Nippon Denko (Aji)), and 0.28 parts by weight of a phospha-rl-based antioxidant (AO-18, manufactured by Adeka Argus Chemical Co., Ltd.) The same processing as in 1 was carried out to produce a plate-shaped molded product with a thickness of 5 mm. At this time, it was colored pale yellow due to resin burning, and furthermore, in this temporal change test in a provisional 190° C. gear oven, the color gradually changed from pale yellow to yellow.
ンＪ、ＥＶＡ−９２１０）４０宙量部と酸化ホウ素（日
本電工（株）製）８０重量部とフェノール系酸化防止剤
（アデカ・アーガス化学（株）製ＰＥＰ−３６）０．２
８重量部とを用い、実施例１と同様の加工を行い、厚み
５ ｍｌｌの板状の成形品を得た。この時樹脂焼けによ
り淡黄色に青色しており、この仮の１９０℃ギヤオーブ
ン中の経時変化試験においては徐々に淡黄色から薄褐色
へと変化することを確認した。J, EVA-9210) 40 parts by weight, 80 parts by weight of boron oxide (manufactured by Nippon Denko Co., Ltd.), and 0.2 parts of phenolic antioxidant (PEP-36, manufactured by Adeca Argus Chemical Co., Ltd.)
Using 8 parts by weight, the same processing as in Example 1 was performed to obtain a plate-shaped molded product with a thickness of 5 ml. At this time, the color was pale yellow to blue due to resin burning, and in this temporal change test in a provisional 190° C. gear oven, it was confirmed that the color gradually changed from pale yellow to light brown.
以上、実施例と比較例の配合割合及び成形加工品の１９
０℃ギヤオーブンにおける樹脂焼は試験結果を表１に示
す。The above is the blending ratio of Examples and Comparative Examples and 19 of molded products.
Table 1 shows the test results for resin baking in a 0°C gear oven.
比較例４
ポリオレフィン系樹脂として直鎖状低密度ポリエチレン
（東ソー（株）装面品名「ニポロンーし」Ｍ−５０）６
０重量部とエチレン−酢酸ビニル共重合体（東ソー（味
）製、商品名「ウルトラセ［発明の効果コ
比較例に示すように従来の方法では樹脂焼けが顕著であ
るのに対し、実施例に示すように本発明による方法では
優れた樹脂焼は改良効果を示し、本発明の］二業的１ｉ
１１ｉ値は高い。Comparative Example 4 Linear low-density polyethylene (Tosoh Co., Ltd. mounting product name "Niporonushi" M-50) 6 as polyolefin resin
0 parts by weight and ethylene-vinyl acetate copolymer (manufactured by Tosoh (Aji), trade name: "Ultrace") As shown, in the method according to the present invention, excellent resin sintering shows an improved effect, and the method according to the present invention
11i value is high.
特許出願人 東ソー株式会社 手続ネｉ’ｌｉｆ書 平成元年Patent applicant: Tosoh Corporation procedure nei’life document 1989
Claims (1)
系酸化防止剤０．２〜５．０重量部とホスファイト系酸
化防止剤０．２〜５．０重量部とに対して中性子線吸収
材料１〜５００重量部を混合分散させてなることを特徴
とする中性子線遮蔽材。(1) 1 to 100 parts by weight of neutron absorbing material for 100 parts by weight of polyolefin resin, 0.2 to 5.0 parts by weight of phenolic antioxidant, and 0.2 to 5.0 parts by weight of phosphite antioxidant A neutron beam shielding material characterized by being made by mixing and dispersing 500 parts by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63216297A JPH0266499A (en) | 1988-09-01 | 1988-09-01 | Neutron ray shielding material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63216297A JPH0266499A (en) | 1988-09-01 | 1988-09-01 | Neutron ray shielding material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0266499A true JPH0266499A (en) | 1990-03-06 |
Family
ID=16686326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63216297A Pending JPH0266499A (en) | 1988-09-01 | 1988-09-01 | Neutron ray shielding material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0266499A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0480246A (en) * | 1990-07-20 | 1992-03-13 | Ube Ind Ltd | Polypropylene resin composition |
| KR100860333B1 (en) * | 2008-08-26 | 2008-09-25 | 주식회사 텍시빌 | Radioactive ray shield |
| JP2014137348A (en) * | 2013-01-18 | 2014-07-28 | As Plan Tec Co Ltd | Radiation shield bag |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52127597A (en) * | 1976-04-19 | 1977-10-26 | Sumitomo Bakelite Co Ltd | Sheet shielding material of radioactive ray with flexibility |
| JPS6234934A (en) * | 1985-08-07 | 1987-02-14 | Sumitomo Chem Co Ltd | Polyolefin resin composition |
| JPS63130648A (en) * | 1986-11-21 | 1988-06-02 | Mitsubishi Petrochem Co Ltd | Polyolefin composition |
-
1988
- 1988-09-01 JP JP63216297A patent/JPH0266499A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52127597A (en) * | 1976-04-19 | 1977-10-26 | Sumitomo Bakelite Co Ltd | Sheet shielding material of radioactive ray with flexibility |
| JPS6234934A (en) * | 1985-08-07 | 1987-02-14 | Sumitomo Chem Co Ltd | Polyolefin resin composition |
| JPS63130648A (en) * | 1986-11-21 | 1988-06-02 | Mitsubishi Petrochem Co Ltd | Polyolefin composition |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0480246A (en) * | 1990-07-20 | 1992-03-13 | Ube Ind Ltd | Polypropylene resin composition |
| KR100860333B1 (en) * | 2008-08-26 | 2008-09-25 | 주식회사 텍시빌 | Radioactive ray shield |
| JP2014137348A (en) * | 2013-01-18 | 2014-07-28 | As Plan Tec Co Ltd | Radiation shield bag |
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