JPH01253696A - Shielding material for thermal neutron - Google Patents
Shielding material for thermal neutronInfo
- Publication number
- JPH01253696A JPH01253696A JP7805188A JP7805188A JPH01253696A JP H01253696 A JPH01253696 A JP H01253696A JP 7805188 A JP7805188 A JP 7805188A JP 7805188 A JP7805188 A JP 7805188A JP H01253696 A JPH01253696 A JP H01253696A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- units
- shielding material
- formula
- 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 32
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 125000005375 organosiloxane group Chemical class 0.000 claims abstract description 8
- 239000003054 catalyst Substances 0.000 claims abstract description 7
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 7
- 229940075613 gadolinium oxide Drugs 0.000 claims abstract description 6
- 229910001938 gadolinium oxide Inorganic materials 0.000 claims abstract description 6
- CMIHHWBVHJVIGI-UHFFFAOYSA-N gadolinium(iii) oxide Chemical class [O-2].[O-2].[O-2].[Gd+3].[Gd+3] CMIHHWBVHJVIGI-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract 4
- 239000000203 mixture Substances 0.000 claims description 23
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 21
- 229920001577 copolymer Polymers 0.000 claims description 11
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 11
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 8
- 229920006305 unsaturated polyester Polymers 0.000 claims description 8
- 125000001931 aliphatic group Chemical group 0.000 claims description 6
- 239000002480 mineral oil Substances 0.000 claims description 3
- 235000010446 mineral oil Nutrition 0.000 claims description 3
- GEMHFKXPOCTAIP-UHFFFAOYSA-N n,n-dimethyl-n'-phenylcarbamimidoyl chloride Chemical compound CN(C)C(Cl)=NC1=CC=CC=C1 GEMHFKXPOCTAIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- WFUGQJXVXHBTEM-UHFFFAOYSA-N 2-hydroperoxy-2-(2-hydroperoxybutan-2-ylperoxy)butane Chemical compound CCC(C)(OO)OOC(C)(CC)OO WFUGQJXVXHBTEM-UHFFFAOYSA-N 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 10
- 229920000728 polyester Chemical class 0.000 abstract description 9
- 229920002554 vinyl polymer Polymers 0.000 abstract description 6
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052688 Gadolinium Inorganic materials 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract 3
- 239000004215 Carbon black (E152) Substances 0.000 abstract 1
- 238000007334 copolymerization reaction Methods 0.000 abstract 1
- 150000004665 fatty acids Chemical group 0.000 abstract 1
- 229930195733 hydrocarbon Natural products 0.000 abstract 1
- 150000002430 hydrocarbons Chemical class 0.000 abstract 1
- -1 β-phenylethyl Chemical group 0.000 description 8
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 7
- 229910052580 B4C Inorganic materials 0.000 description 5
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 239000012763 reinforcing filler Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- QUQMBZBYZFWOQA-UHFFFAOYSA-M gadolinium(3+) oxygen(2-) hydroxide Chemical compound [OH-].[O-2].[Gd+3] QUQMBZBYZFWOQA-UHFFFAOYSA-M 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 125000003342 alkenyl group Chemical group 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 125000003710 aryl alkyl group Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 125000000582 cycloheptyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 229940097156 peroxyl Drugs 0.000 description 1
- PKELYQZIUROQSI-UHFFFAOYSA-N phosphane;platinum Chemical class P.[Pt] PKELYQZIUROQSI-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000012260 resinous material Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 125000005023 xylyl group Chemical group 0.000 description 1
Abstract
Description
【発明の詳細な説明】
１−産業上の利用分野」
本発明は酸化力ドリニウｌ＼含有熱中性子遮蔽材に関す
る。DETAILED DESCRIPTION OF THE INVENTION 1-Field of Industrial Application The present invention relates to a thermal neutron shielding material containing oxidizing power Dolinium.
］従来の技術］
従来、中性子遮蔽材としてシリコーンコノ＼に水酸化ア
ルミニウムを充填したものか知られている。[Prior Art] Conventionally, a silicone container filled with aluminum hydroxide has been known as a neutron shielding material.
中性子遮蔽材に水酸化アルミニウムを使用する目的は中
性子遮蔽材に難燃性を付与することにある。The purpose of using aluminum hydroxide as a neutron shielding material is to impart flame retardancy to the neutron shielding material.
また、水酸化アルミニウムはシリコーンゴムと同等の高
速中性子を低速中性子すなわち熱中性子に減速させる作
用をもつ。Additionally, aluminum hydroxide has the same effect as silicone rubber in moderating fast neutrons into slow neutrons, that is, thermal neutrons.
また、特開昭５３−７３０００号公報にはポリオルガノ
シロキサンに炭化硼素粒子を配合分散させた耐放射線性
中性子吸収遮蔽材か開示されている。この遮蔽材は高速
中性子の低速中性子への減速作用をポリオルカッシロキ
サン中の水素により谷）、また、低速中性子を吸収する
ために炭化硼素を作用させるものである。Further, Japanese Patent Application Laid-open No. 73000/1983 discloses a radiation-resistant neutron absorption shielding material in which boron carbide particles are blended and dispersed in polyorganosiloxane. This shielding material uses hydrogen in polyorcasiloxane to slow down fast neutrons to slow neutrons, and also uses boron carbide to absorb slow neutrons.
１発明か解決しようとする課題］
しかし、上述の炭化硼素は中性子遮蔽材は低速中性子す
なわち熱中性子を吸収する指数となる熱中性子吸収断面
積が小さく、余り良好な熱中性子吸収材とは言えない。[1] Invention or problem to be solved] However, the above-mentioned boron carbide neutron shielding material has a small thermal neutron absorption cross section, which is an index for absorbing slow neutrons, that is, thermal neutrons, and cannot be said to be a very good thermal neutron absorbing material. .
従って、本発明の目的は熱中性子の吸収特性に優れた熱
中性子遮蔽材を提供するにある。Therefore, an object of the present invention is to provide a thermal neutron shielding material having excellent thermal neutron absorption properties.
［課題を解決するための手段］
本発明者らは上述の課題を解決するために鋭意研究し、
ガドリニウム原子が炭化硼素の６０〜７０倍の熱中性子
吸収断面積をもっことに着目し、カドリニウムの安定形
態である酸化カドリニウムを基材となる樹脂に添加する
ことにより優れた熱中性子遮蔽材を得られることを見出
し、本発明を完成するに至った。[Means for Solving the Problems] In order to solve the above problems, the present inventors have conducted extensive research,
Focusing on the fact that gadolinium atoms have a thermal neutron absorption cross section that is 60 to 70 times that of boron carbide, we created an excellent thermal neutron shielding material by adding cadolinium oxide, a stable form of gadolinium, to the base resin. The present invention was completed based on the discovery that the present invention is possible.
即ち、本発明は
（Ａ） ・ −１１５１式
［式中、Ｒは脂肪族不飽和結合を含有しない一価炭化水
素基、Ｒ′は一価炭化水素基、■１は（Ａ）の粘度か２
５°Ｃにおいて１（１０〜５０，０ＯＯｃＳ＋になる数
を示ず］で表されるビニル基で両末端が封鎖されたポリ
オルガノシロキサン１００重量部、
（Ｂ）・（Ｒ，″＞２ｓ；ｏ単位を含みまたは含まず、
（Ｒ″）３Ｓｉｏｏ５単位と５ｉ０２単位（式中、Ｒ″
は脂肪族不飽和結合を含有しない一価炭化水素基及びビ
ニル基から選ばれた基を示す）よりなり、珪素原子の２
５〜１０モル％は珪素原子に直結するビニル基を有し、
（Ｒ″）３Ｓｉｏｏ５単位：ＳＩ○、単位の比か０．／
１．：１〜１：］であるポリオルカノシロキザン共重合
体０〜１００重量部、
（Ｃ）、一般式
［式中、Ｒは（Ａ）におけるＲと同し意義をもち、ｍは
２以上の数であり、ａは１．０〜２０の値を有し、ｌ）
はＯ、］〜１． 、 Ｏの値を有し、（ａ−１−ｂ）は
１９〜３，０であり、−分子について平均２個を超える
数の珪素原子に直結する水素を有する］で表わされ、（
Ａ、）及び（Ｂ）のポリオルガノシロキサンのビニル基
１個について珪素原子に直結する水素原子０５〜５．０
個となるに充分な量のポリオルカッ水素シロキサン、よ
りなるオルカッシロキサン組成物４０〜９９重量部、
（Ｄ） 酸化ガドリニウム１〜６０重量部、及び（Ｅ
）・実効量の白金触媒、
よりなる組成物を硬化して得られる熱中性子遮蔽材に係
る。That is, the present invention is based on the formula (A) -1151 [wherein, R is a monovalent hydrocarbon group containing no aliphatic unsaturated bond, R' is a monovalent hydrocarbon group, and (1) is the viscosity of (A). 2
100 parts by weight of a polyorganosiloxane whose both ends were capped with a vinyl group represented by 1 (number not shown for 10 to 50,0 OOcS+) at 5°C, (B)・(R,″>2s; o with or without units;
(R″)3Sioo5 units and 5i02 units (in the formula, R″
represents a group selected from a monovalent hydrocarbon group containing no aliphatic unsaturated bond and a vinyl group), and consists of 2 silicon atoms.
5 to 10 mol% has a vinyl group directly bonded to a silicon atom,
(R″)3Sioo5 units: SI○, unit ratio 0./
1. 0 to 100 parts by weight of a polyolkanosiloxane copolymer having the following formula: 1 to 1:], (C), general formula [wherein R has the same meaning as R in (A), m is 2 or more number, a has a value from 1.0 to 20, l)
is O, ]~1. , O, (a-1-b) is from 19 to 3,0, - has on average more than 2 hydrogens directly connected to silicon atoms per molecule], and (
05 to 5.0 hydrogen atoms directly bonded to silicon atoms per vinyl group of polyorganosiloxanes A, ) and (B)
(D) 1 to 60 parts by weight of gadolinium oxide, and (E
)・It pertains to a thermal neutron shielding material obtained by curing a composition comprising an effective amount of a platinum catalyst.
更に、本発明は
（ａ） 分子量６００〜１．２００の不飽和ポリエス
テル４０〜９９重量部、
（ｂ）・ナフテン酸コバルト６％及び鉱物油９４％より
なる促進剤を不飽和ポリエステルの重量に対し１〜２％
、
（Ｃ）：メヂルエヂルケトンパーオキサイＩ・５０〜５
５％及び可塑剤４５〜５０％よりなる硬化剤を不飽和ポ
リエステルの重量に対し１〜２％、及び（ｄ）二酸化ガ
ドリニウム１〜６０重量部よりなる組成物を硬化して得
られる熱中性子遮蔽材に係る。Furthermore, the present invention includes (a) 40 to 99 parts by weight of an unsaturated polyester having a molecular weight of 600 to 1.200, and (b) an accelerator consisting of 6% cobalt naphthenate and 94% mineral oil based on the weight of the unsaturated polyester. 1-2%
, (C): Medyl edyl ketone peroxyl I.50-5
Thermal neutron shielding obtained by curing a composition comprising (d) 1 to 60 parts by weight of gadolinium dioxide, 1 to 2% by weight of the unsaturated polyester, and (d) 1 to 60 parts by weight of gadolinium dioxide. Related to materials.
［作 用］
本発明において、ビニル鎖端ポリオルガノシロキサン成
分（Ａ）のＲ及びＲ′によって表される一価炭化水素基
としてはアルキル基（例えばメチル、エチル、プロピル
、ブチル、ヘキシル、オクチル、及びデシル基）、アリ
ール基（例えはフェニル、トリル及びキシリル基）、シ
クロアルキル基（例えはシクロへキシル及びシクロヘプ
チル基）、アラルキル基（例えばヘンシル、β−フェニ
ルエヂル及びβ−フェニルプロピル基）か例示され、Ｒ
′としては更にアルケニル基（ビニル及びアルリル基）
か例示に追加される。Ｒ及びＲ′はそれぞれ１種または
２種以上を併用しても差し支えなく、また、互いに同一
であっても異なっていてもよい。[Function] In the present invention, the monovalent hydrocarbon groups represented by R and R' of the vinyl chain end polyorganosiloxane component (A) include alkyl groups (for example, methyl, ethyl, propyl, butyl, hexyl, octyl, and decyl groups), aryl groups (e.g. phenyl, tolyl and xylyl groups), cycloalkyl groups (e.g. cyclohexyl and cycloheptyl groups), aralkyl groups (e.g. hensyl, β-phenylethyl and β-phenylpropyl groups), exemplified, R
′ can also be an alkenyl group (vinyl or allyl group)
or added to the examples. R and R' may each be used alone or in combination of two or more, and may be the same or different.
Ｒ及びＲ′によって表わされる基の少なくとも５０％は
メチル及びビニルからなる群から選択され、好ましい特
別の組成物においてはＲ及びＲ′によって表わされる基
の全てがメチル基及びビニル基である。At least 50% of the groups represented by R and R' are selected from the group consisting of methyl and vinyl, and in particular preferred compositions all of the groups represented by R and R' are methyl and vinyl groups.
ｎの値は成分（Ａ）の２５℃にお（つる粘度か１００〜
５０．０００ｃＳｔ、好ましくは５００〜８，０００ｃ
Ｓｔになる範囲である。成分（Ａ）の粘度が１００ｃＳ
ｔ未満ては充分な物理特性が得られず、５０，０ＯＯｃ
Ｓｔを超えると未硬化の状態での取り扱いが困難になる
ために好ましくない。The value of n is determined at 25℃ (vine viscosity or 100~
50.000cSt, preferably 500-8,000c
This is the range where St. The viscosity of component (A) is 100cS
If the temperature is less than 50,0OOc, sufficient physical properties cannot be obtained.
If it exceeds St, it becomes difficult to handle in an uncured state, which is not preferable.
本発明における成分（Ｂ）のポリオルカノシロキン共重
合体は補強性充填剤を含有しなくても組成物に充分な強
度を与えるための成分で、脂肪族不飽和結合を含有しな
い一価炭化水素またはビニル基であることかできるＲ″
基を含有し、Ｒ″基の少なくとも前述した割合かビニル
基であるポリオルガノシロキサン共重合体として定義し
うる。ビニル基でないＲ″基は成分（Ａ）のＲ基と同じ
範囲のもの及びその類似の基てあり、その好ましい実施
態様では脂肪族不飽和結合を含有しない一価炭化水素基
の全てかメチル基である。ビニル基は（Ｒ″）、Ｓ ｉ
ｏ ８．５基の一部として、または（Ｒ″）２ＳｉＯ基
の一部として存在することかでき、あるいはその両方に
存在することもできる。The polyorkanosiloquine copolymer as component (B) in the present invention is a monovalent carbonized component that provides sufficient strength to the composition without containing a reinforcing filler and does not contain aliphatic unsaturated bonds. R″ can be hydrogen or vinyl group
and in which at least the abovementioned proportion of the R'' groups are vinyl groups. A similar group, in a preferred embodiment of which is a methyl group, is a monovalent hydrocarbon group that does not contain aliphatic unsaturation. The vinyl group is (R″), S i
It can be present as part of the o8.5 group or as part of the (R'')2SiO group, or both.
共重合体成分（Ｂ）中の各種のシロキサン単位は（Ｒ″
）３ＳｉＯ８，５単位： Ｓ ｉ Ｏ２単位の比か０４
．］−１−： １にあるように３１！釈する。（Ｒ″＞
３３ ｉｏ ｏ、５単位５ｉＯ７【社位の比が０４，１
未満ては、成分（Ｂ）の安定性か悪くて制御よく合成す
ることが困難てあり、また、］・１を超えると硬化物に
良好な機械的強度を与えることができないために好まし
くない。Various siloxane units in the copolymer component (B) are (R″
)3SiO8,5 units: Ratio of SiO2 units 04
．． ]-1-: 31 as in 1! Interpret. (R″＞
33 io o, 5 units 5iO7 [rank ratio is 04,1
If it is less than 1, the stability of component (B) is poor and it is difficult to synthesize it in a well-controlled manner, and if it is more than ].1, good mechanical strength cannot be imparted to the cured product, which is undesirable.
（Ｒ″＞２３ｉｏ単位は共重合体中のシロキサン単位の
全数を基準にして０〜１０モル％に等しい量で存在する
。珪素結合ビニル基が共重合体中に位置している場所に
は無関係に、珪素結合ビニル基は共重合体成分（Ｂ）の
２．５〜１００モル％に等しい量で存在しているべきで
ある。(R″>23 io units are present in an amount equal to 0 to 10 mol%, based on the total number of siloxane units in the copolymer, regardless of where the silicon-bonded vinyl group is located in the copolymer. In addition, the silicon-bonded vinyl groups should be present in an amount equal to 2.5 to 100 mole percent of copolymer component (B).
共重合体成分（Ｂ）は固体の樹脂状材料であり、多くの
場合はへ一シレンまたは１〜ルエンのことき溶媒中の溶
液として、かつ一般には３０〜７５重景％溶重量して製
造されている。組成物の取り扱いを容易にするなめ、共
重合体成分（Ｂ）のこの溶液は通常ビニル鎖端ボリシロ
キザン成分（Ａ）の一部または全部中に溶解し、得られ
た溶液より溶媒を留去して成分（Ａ）と共重合体成分（
Ｂ）の混合物を造ってもよいし、予め溶媒を除いた成分
（Ｂ）を用いても構わない。Copolymer component (B) is a solid resinous material, often prepared as a solution in a solvent such as hemocylene or toluene, and generally from 30 to 75% by weight. has been done. To facilitate handling of the composition, this solution of copolymer component (B) is usually dissolved in some or all of the vinyl chain-terminated polysiloxane component (A), and the solvent is distilled off from the resulting solution. Component (A) and copolymer component (
A mixture of B) may be prepared, or component (B) from which the solvent has been removed may be used.
成分（Ｂ）の量は成分（Ａ）１．００重量部に対して０
〜１００重量部、好ましくは１０〜８０重量部である。The amount of component (B) is 0 per 1.00 parts by weight of component (A).
-100 parts by weight, preferably 10-80 parts by weight.
中性子遮蔽材に機械的強度が必要な場合には、成分（Ｂ
）を１０重量部以上配合しないと補強性充填剤なしては
充分な強度が得られず、補強性充填剤を併用すると本発
明で意図する中性子の遮蔽に必要な水酸化マグネシウム
粉及びＢ４Ｃ粉の充填が不用能になるために好ましくな
い。また、成分（Ｂ）の量か１００重量部を超えると、
未硬化の状Ｔルの組成物の粘度が高くなって取り扱いに
くい。If mechanical strength is required for the neutron shielding material, the component (B
), sufficient strength cannot be obtained without a reinforcing filler, and if a reinforcing filler is used in combination, the magnesium hydroxide powder and B4C powder necessary for the neutron shielding intended in the present invention will be reduced. This is undesirable because filling becomes unnecessary. In addition, if the amount of component (B) exceeds 100 parts by weight,
The uncured composition has a high viscosity and is difficult to handle.
本発明における成分（Ｃ）のポリオルカッ水素シロキサ
ンは成分（Ａ）及び（Ｂ）と反応して網状のポリシロキ
サンを構成するものてあり、そのために分子中に平均２
個を超える数の珪素結合水素原子をもつものである。こ
のようなポリオルカッ水素シロキサンはシロキサン単位
が鎖状、分岐状、環状のいずれてあってもよく、珪素−
水素結合をもつシロキサン単位のみからなる重合体でも
、これとトリオルカッシロキシ単位、ジオルカッシロキ
シ単位、モノオルカッシロキシ単位及び５ｉ０２単位の
うち１種または２種以上との共重合体でもよい６Ｒとし
ては成分（Ａ）におけるＩ（と同様なものか例示され、
１種または２種以」二を併用しても差し支えないか、合
成のし易すさ、比較的低い粘度で硬化後の良好な物理特
性を得ることから、メチル基及びフェニル基が好ましく
、特にメチル基が好ましい。−分子中に平均２個を超え
る数の珪素結合水素原子をもつためには、合成の容易さ
から、ｍは２以」二であることが必要で、好ましくは４
〜１、、ＯＯＯの範囲である。【０か４未満ては揮発性
が大きく、１ 、ＯＯＯを超えると合成、取り扱いか困
難となる。ａが１０未満のものや、ｂが１０を超えるも
のは合成が困難である。ａか２０を超えると成分（Ｃ）
が必要な珪素結合水素原子を有しつつ所望のｍをとるこ
とができず、ｌ〕が０．１未満ては所望の珪素結合水素
原子を与えるための【ｎの数か大きくなって、成分（Ｃ
）の取り扱いが困難になる。ａ＋１〕の和が１９未溝の
ものは制御よく合成することが困難であり、３．０を超
えると必要な重合度が得られない。The polyorkahydrogensiloxane of the component (C) in the present invention reacts with the components (A) and (B) to form a network polysiloxane.
It has more than one silicon-bonded hydrogen atom. The siloxane unit of such polyorkahydrogensiloxane may be chain, branched, or cyclic, and silicon-
6R may be a polymer consisting only of siloxane units with hydrogen bonds, or a copolymer of this with one or more of triocassyloxy units, diiocassyloxy units, monoorcassyloxy units, and 5i02 units. is similar to I (in component (A)),
Methyl groups and phenyl groups are preferred, and methyl groups and phenyl groups are preferred because they can be used alone or in combination of two or more, and because they are easy to synthesize, have relatively low viscosity, and provide good physical properties after curing. Groups are preferred. - In order to have more than 2 silicon-bonded hydrogen atoms on average in a molecule, m needs to be 2 or more, preferably 4 for ease of synthesis.
~1,,OOO. If it is less than 0 or 4, it will be highly volatile, and if it exceeds 1 or OOO, it will be difficult to synthesize and handle. It is difficult to synthesize those where a is less than 10 and those where b is more than 10. If a exceeds 20, component (C)
It is not possible to obtain the desired m while having the necessary silicon-bonded hydrogen atoms, and if l] is less than 0.1, the number of [n to provide the desired silicon-bonded hydrogen atoms becomes larger, and (C
) becomes difficult to handle. It is difficult to synthesize in a controlled manner when the sum of [a+1] is 19, and when it exceeds 3.0, the required degree of polymerization cannot be obtained.
成分（Ｃ）の基は成分（Ａ）及び成分（Ｂ）に含まれる
ビニル基１個に対して成分（Ｃ）に含まれる珪素＝１１
＝
原子に直接結合した水素原子の量か０５〜５．０個とな
るのに充分な量である。０．５個未満てはゴム状弾性体
か得られず、５０個を超えると発泡したり、機械的性質
の低下をもたらすために好ましくない。The group of component (C) is silicon contained in component (C) for one vinyl group contained in component (A) and component (B) = 11
= The amount of hydrogen atoms directly bonded to the atom is sufficient to provide 0.5 to 5.0 hydrogen atoms. If the number is less than 0.5, a rubber-like elastic body cannot be obtained, and if it exceeds 50, foaming may occur or the mechanical properties may deteriorate, which is not preferable.
本発明に使用する白金触媒成分（Ｅ）は珪素−水素結合
と珪素結合ビニル基との間の反応を行わせるのに有効な
公知の白金触媒の全てを含む。成分（Ｅ）としては白金
黒、白金−オレフィン錯体、白金−ビニルシロキサン錯
体、白金−ホスフィン錯体及び白金−ポスファイト錯体
が例示される。使用する白金触媒の種類に関係なく、触
媒は通常組成物中の珪素結合ビニル基１モルについて白
金１０−３ないし１０−６グラム原子となるに充分な量
て使用する。The platinum catalyst component (E) used in the present invention includes all known platinum catalysts that are effective in effecting the reaction between silicon-hydrogen bonds and silicon-bonded vinyl groups. Examples of component (E) include platinum black, platinum-olefin complexes, platinum-vinylsiloxane complexes, platinum-phosphine complexes, and platinum-posphite complexes. Regardless of the type of platinum catalyst used, the catalyst is usually used in an amount sufficient to provide 10@-3 to 10@-6 gram atoms of platinum per mole of silicon-bonded vinyl groups in the composition.
次に、本発明に使用する不飽和ポリエステル成分（、）
は分子策か６００〜１．．２００の範囲内にあるものて
あれは特に限定されるものではなく、例えは大日本イン
キ化学工業株式会社製のポリライ１〜等を使用すること
かできる６
促進剤成分（ｂ）はナフテン酸コバルト６％及び鉱物油
９４％よりなるものであり、成分（ｂ）の配合量は不飽
和ポリエステル成分（ａ）の重量当たり１〜２％である
。Next, the unsaturated polyester component used in the present invention (,)
Is it a molecular strategy?600~1. ．． 200 is not particularly limited, and for example, Polylye 1 to 1 manufactured by Dainippon Ink and Chemicals Co., Ltd. can be used.6 The accelerator component (b) is cobalt naphthenate. 6% and 94% mineral oil, and the amount of component (b) is 1 to 2% by weight of the unsaturated polyester component (a).
硬化剤成分（ｃ）はメチルエヂルケＩ〜ンパーオキサイ
ト５０〜５５％及び可塑剤４５〜５０％よりなるもので
あり、成分（ｃ）の配合量は不飽和ポリエステル成分（
ａ）の重量当たり１〜２％である。The curing agent component (c) consists of 50 to 55% of methyl edilium peroxide and 45 to 50% of a plasticizer.
1 to 2% by weight of a).
なお、可塑剤としては例えばＤ−オクチルフタレー１へ
等を用いることができる。In addition, as a plasticizer, for example, D-octyl phthalate 1 or the like can be used.
本発明に使用する成分（Ｄ）及び（ｄ）は酸化ガドリニ
ウム（ｃｄ２ｏ、）である。酸化カドリニウムは熱中性
子吸収特性に優れた力１〜リニウムをオルカッシロキサ
ン組成物またはポリエステル組成物から・なる基体に添
加するために使用するものであり、その配合量はオルカ
ッシロキサン組成物［（Ａ、）−１−（Ｂ ）＋ （Ｃ
）］４０〜９９重量部またはポリエステル成分（ａ）４
．０〜９９重量部に対して１〜６０重量部の範囲内であ
る。酸化カドリニウムの配合量が１重量部未満であると
、その熱中性子吸収特性か充分に発揮されないなめに好
ましくない。また、」二限は特に限定されるものてはな
く、オルカノシロキザン組成物またはポリエステル組成
物が成形性を保持てきる範囲で配合することがてきるが
、通常６０重量部程度が成形性を保持できる上限となる
。Components (D) and (d) used in the present invention are gadolinium oxide (cd2o, ). Cadolinium oxide is used to add linium, which has excellent thermal neutron absorption properties, to a substrate made of an orcasiloxane composition or a polyester composition, and its blending amount is equal to or less than the amount of orcasiloxane composition [( A,)-1-(B)+(C
)] 40 to 99 parts by weight or polyester component (a) 4
．． It is within the range of 1 to 60 parts by weight relative to 0 to 99 parts by weight. If the amount of cadrinium oxide added is less than 1 part by weight, its thermal neutron absorption properties are not fully exhibited, which is undesirable. Furthermore, there is no particular limit to the limit, and the composition can be blended within a range that maintains moldability of the orkanosiloxane composition or polyester composition, but usually about 60 parts by weight is sufficient to maintain moldability. This is the upper limit that can be maintained.
上述の配合をもつオルカノシロキザン系またはポリエス
テル系の組成物を所定の形状に成形し、硬化することに
より本発明の熱中性子遮蔽材を得ることができる。The thermal neutron shielding material of the present invention can be obtained by molding an orkanosiloxane-based or polyester-based composition having the above-mentioned formulation into a predetermined shape and curing it.
１実 施 例」 以下に実施例を挙げて本発明の熱中性子遮蔽材を得た。1 Implementation Example” Examples are given below to obtain thermal neutron shielding materials of the present invention.
実−總−例−
以下の第１表に記載する配合割合のオルカノシロキザン
系紺成物及びポリニスデル系組成物を用いて厚さ１＋ｎ
＋ｎのシート材に成形し、硬化させ、本発明の熱中性子
遮蔽材としな。Practical Example - Using an orkanosiloxane-based navy blue composition and a polynisder-based composition in the proportions listed in Table 1 below, a thickness of 1+n was obtained.
+n sheet material, hardened, and used as the thermal neutron shielding material of the present invention.
得られた熱中性子遮蔽材を１枚ないし数枚重ねて、［」
木原子力研究所東海Ｊ’ Ｉ（Ｒ−２号炉により］ ０
人及び２．４４人の中性子を照射した結果を第１図ない
し第４図に記載する。Layer one or several layers of the obtained thermal neutron shielding material, [''
Ki Nuclear Research Institute Tokai J' I (by reactor R-2) 0
The results of irradiating a person and 2.44 people with neutrons are shown in Figures 1 to 4.
また、上記試験から得られた熱中性子遮蔽材のＩ／Ｉ。Moreover, I/I of the thermal neutron shielding material obtained from the above test.
＝１／１．０００の場合の中性子遮蔽材の厚さ（ＩｎＩ
ｎ）と線吸収係数（μ・ｃ「１）の値を第１表に併記す
る。Thickness of neutron shielding material when = 1/1.000 (InI
The values of n) and linear absorption coefficient (μ·c “1)” are also listed in Table 1.
／
［発明の効果］
本発明の熱中性子遮蔽材は基体であるオルカッシロキサ
ン組成物またはポリエステル組成物に高熱中性子吸収断
面積をもつカドリニウムを酸化カドリニウムの形態て添
加することにより、これまでにない優れた熱中性子吸収
特性を得ることができ、種々の原子力設備等の熱中性子
遮蔽材として使用することかできる。/ [Effect of the invention] The thermal neutron shielding material of the present invention has unprecedented properties by adding cadrinium, which has a high thermal neutron absorption cross section, in the form of cadrinium oxide to the base orcasiloxane composition or polyester composition. It has excellent thermal neutron absorption properties and can be used as a thermal neutron shielding material for various nuclear facilities.
第１図は実施例で得られたオルガノシロキサン系の熱中
性子遮蔽材に１．０人の中性子線を照射した時のデータ
を示す図であり、第２図は実施例で得られたオルガノシ
ロキサン系の熱中性子遮蔽材に２４４人の中性子線を照
射した時のデータを示す図であり、第３図は実施例で得
られたポリエステル系の熱中性子遮蔽材に１０人の中性
子線を照射した時のデータを示す図であり、第４図は実
施例で得られたポリエステル系の熱中性子遮蔽Ｈに２４
４人の中性子線を照射した時のデータを示ず図である。
手続補正書く方式）
昭和６３年 ７月 ５日Figure 1 is a diagram showing data when the organosiloxane-based thermal neutron shielding material obtained in the example was irradiated with a neutron beam of 1.0 people, and Figure 2 is a diagram showing the data obtained when the organosiloxane-based thermal neutron shielding material obtained in the example was irradiated with a neutron beam of 1.0 people. This is a diagram showing data when the thermal neutron shielding material of the system was irradiated with neutron beams from 244 people, and Figure 3 shows the data when the polyester-based thermal neutron shielding material obtained in the example was irradiated with neutron beams from 10 people. Fig. 4 shows the polyester thermal neutron shielding H obtained in the example at 24 hrs.
It is a figure which does not show the data when four people were irradiated with neutron beams. Procedure amendment writing method) July 5, 1986
Claims (1)
素基、Ｒ′は一価炭化水素基、ｎは（Ａ）の粘度が２５
℃において１００〜５０，０００ｃＳｔになる数を示す
］ で表されるビニル基で両末端が封鎖されたポリオルガノ
シロキサン１００重量部、 （Ｂ）：（Ｒ″）＿２ＳｉＯ単位を含みまたは含まず、
（Ｒ″）＿３ＳｉＯ＿０＿．＿５単位とＳｉＯ＿２単位
（式中、Ｒ″は脂肪族不飽和結合を含有しない一価炭化
水素基及びビニル基から選ばれた基を示す）よりなり、
珪素原子の２．５〜１０モル％は珪素原子に直結するビ
ニル基を有し、 （Ｒ″）＿３ＳｉＯ＿０＿．＿５単位：ＳｉＯ＿２単位
の比が０．４：１〜１：１であるポリオルガノシロキサ
ン共重合体０〜１００重量部、 （Ｃ）：一般式 ▲数式、化学式、表等があります▼ ［式中、Ｒは（Ａ）におけるＲと同じ意義をもち、ｍは
２以上の数であり、ａは１．０〜２．０の値を有し、ｂ
は０．１〜１．０の値を有し、（ａ＋ｂ）は１．９〜３
．０であり、一分子について平均２個を超える数の珪素
原子に直結する水素を有する］ で表わされ、（Ａ）及び（Ｂ）のポリオルガノシロキサ
ンのビニル基１個について珪素原子に直結する水素原子
０．５〜５．０個となるに充分な量のポリオルガノ水素
シロキサン、 よりなるオルガノシロキサン組成物４０〜９９重量部、 （Ｄ）、酸化ガドリニウム１〜６０重量部、及び （Ｅ）実効量の白金触媒、 よりなる組成物を硬化して得られる熱中性子遮蔽材。 ２、（ａ）：分子量６００〜１，２００の不飽和ポリエ
ステル４０〜９９重量部、 （ｂ）：ナフテン酸コバルト６％及び鉱物油９４％より
なる促進剤を不飽和ポリエステル重量当たり１〜２％、 （ｃ）：メチルエチルケトンパーオキサイド５０〜５５
％及び可塑剤４５〜５０％よりなる硬化剤を不飽和ポリ
エステルの重量当たり１〜２％、及び （ｄ）：酸化ガドリニウム１〜６０重量部よりなる組成
物を硬化して得られる熱中性子遮蔽材。[Claims] 1. (A): General formula ▲ Numerical formula, chemical formula, table, etc. ▼ [In the formula, R is a monovalent hydrocarbon group that does not contain an aliphatic unsaturated bond, and R' is a monovalent hydrocarbon group. Hydrogen group, n is the viscosity of (A) 25
100 parts by weight of a polyorganosiloxane with both ends capped with a vinyl group represented by (B): (R″)_2 containing or not containing SiO units;
(R″)_3SiO_0_._5 units and SiO_2 units (wherein R″ represents a group selected from a monovalent hydrocarbon group and a vinyl group that does not contain an aliphatic unsaturated bond),
A polyorganosiloxane in which 2.5 to 10 mol% of the silicon atoms have vinyl groups directly bonded to the silicon atoms, and the ratio of (R″)_3SiO_0_._5 units:SiO_2 units is 0.4:1 to 1:1. Copolymer 0 to 100 parts by weight, (C): General formula ▲ Numerical formula, chemical formula, table, etc. ▼ [In the formula, R has the same meaning as R in (A), m is a number of 2 or more, , a has a value of 1.0 to 2.0, b
has a value of 0.1 to 1.0, and (a+b) has a value of 1.9 to 3
．． 0 and has an average of more than 2 hydrogens directly bonded to silicon atoms per molecule], and each vinyl group of the polyorganosiloxanes (A) and (B) is directly bonded to a silicon atom. Polyorganohydrogensiloxane in an amount sufficient to provide 0.5 to 5.0 hydrogen atoms, 40 to 99 parts by weight of an organosiloxane composition consisting of (D), 1 to 60 parts by weight of gadolinium oxide, and (E) effective A thermal neutron shielding material obtained by curing a composition consisting of a quantity of platinum catalyst. 2. (a): 40 to 99 parts by weight of unsaturated polyester with a molecular weight of 600 to 1,200, (b): 1 to 2% of an accelerator consisting of 6% cobalt naphthenate and 94% mineral oil based on the weight of the unsaturated polyester. , (c): Methyl ethyl ketone peroxide 50-55
Thermal neutron shielding material obtained by curing a composition consisting of 1 to 2% of a curing agent based on the weight of unsaturated polyester, and (d): 1 to 60 parts by weight of gadolinium oxide. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7805188A JPH01253696A (en) | 1988-04-01 | 1988-04-01 | Shielding material for thermal neutron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7805188A JPH01253696A (en) | 1988-04-01 | 1988-04-01 | Shielding material for thermal neutron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01253696A true JPH01253696A (en) | 1989-10-09 |
Family
ID=13651050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7805188A Pending JPH01253696A (en) | 1988-04-01 | 1988-04-01 | Shielding material for thermal neutron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01253696A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994014167A1 (en) * | 1992-12-11 | 1994-06-23 | Sanoya Industries Co., Ltd. | RADIATION-BARRIER MATERIAL CAPABLE OF SIMULTANEOUS SHIELDING AGAINST η-RAY, X-RAY AND NEUTRON BEAM |
| JP2016090535A (en) * | 2014-11-11 | 2016-05-23 | 岩宮 陽子 | Radiation shield structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55119099A (en) * | 1979-03-09 | 1980-09-12 | Mitsui Shipbuilding Eng | Neutron shielding material |
| JPS5986609A (en) * | 1982-11-08 | 1984-05-18 | Mitsubishi Rayon Co Ltd | Methacrylate resin composition and its production |
| JPS61290400A (en) * | 1985-06-18 | 1986-12-20 | 株式会社神戸製鋼所 | Neutron shielding material |
| JPS6212896A (en) * | 1985-07-10 | 1987-01-21 | 東芝シリコ−ン株式会社 | Gamma-ray shielding material |
-
1988
- 1988-04-01 JP JP7805188A patent/JPH01253696A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55119099A (en) * | 1979-03-09 | 1980-09-12 | Mitsui Shipbuilding Eng | Neutron shielding material |
| JPS5986609A (en) * | 1982-11-08 | 1984-05-18 | Mitsubishi Rayon Co Ltd | Methacrylate resin composition and its production |
| JPS61290400A (en) * | 1985-06-18 | 1986-12-20 | 株式会社神戸製鋼所 | Neutron shielding material |
| JPS6212896A (en) * | 1985-07-10 | 1987-01-21 | 東芝シリコ−ン株式会社 | Gamma-ray shielding material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994014167A1 (en) * | 1992-12-11 | 1994-06-23 | Sanoya Industries Co., Ltd. | RADIATION-BARRIER MATERIAL CAPABLE OF SIMULTANEOUS SHIELDING AGAINST η-RAY, X-RAY AND NEUTRON BEAM |
| JP2016090535A (en) * | 2014-11-11 | 2016-05-23 | 岩宮 陽子 | Radiation shield structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4072635A (en) | Organosiloxane gels | |
| US3436366A (en) | Silicone potting compositions comprising mixtures of organopolysiloxanes containing vinyl groups | |
| CA1082834A (en) | Inhibitor for platinum catalyzed silicone rubber compositions | |
| JP2680174B2 (en) | Liquid injection moldable silicone rubber | |
| EP1836260B1 (en) | Bonded composite of silicone resin and epoxy resin and a method for manufacturing thereof | |
| US4176093A (en) | Neutron absorbing room temperature vulcanizable silicone rubber compositions | |
| US4529789A (en) | Liquid curable polyorganosiloxane compositions | |
| GB1577511A (en) | Self-adhering silicone compositions and preparation thereof | |
| US4234713A (en) | Curable solventless organopolysiloxane compositions | |
| JPS58171443A (en) | Organopolysiloxane composition | |
| JPS6296562A (en) | Silicone composition | |
| US2833732A (en) | Method of preparing siloxane resin foams | |
| JP3485602B2 (en) | Elastomer molding composition | |
| JPS63205359A (en) | Curable fluorinated silicone composition | |
| JP2741436B2 (en) | Surface-treated alumina and thermally conductive silicone composition containing the same | |
| JP4520137B2 (en) | One-part organopolysiloxane gel composition | |
| JPS60217262A (en) | Liquid curable polyorganosiloxane composition | |
| JPH01165663A (en) | Room-temperature-curable composition | |
| JPH01253696A (en) | Shielding material for thermal neutron | |
| US3379659A (en) | Organopolysiloxane foam-forming materials | |
| US3234175A (en) | Siloxane compositions and elastomers prepared therefrom | |
| JPS6385497A (en) | Neutron shielding material | |
| JPS62217199A (en) | Neutron shielding material | |
| US2999078A (en) | Organosiloxane coating composition of | |
| JPS63234062A (en) | Organopolysiloxane liquid injection molding composition |