JPH04189855A - Flame-retardant composition - Google Patents
Flame-retardant compositionInfo
- Publication number
- JPH04189855A JPH04189855A JP2318653A JP31865390A JPH04189855A JP H04189855 A JPH04189855 A JP H04189855A JP 2318653 A JP2318653 A JP 2318653A JP 31865390 A JP31865390 A JP 31865390A JP H04189855 A JPH04189855 A JP H04189855A
- Authority
- JP
- Japan
- Prior art keywords
- flame
- weight
- parts
- flame retardant
- zinc sulfide
- 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.)
- Granted
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 21
- 239000003063 flame retardant Substances 0.000 title claims description 23
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims description 19
- 239000012796 inorganic flame retardant Substances 0.000 claims abstract description 11
- 239000005083 Zinc sulfide Substances 0.000 claims abstract description 10
- 229910052984 zinc sulfide Inorganic materials 0.000 claims abstract description 10
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229920005672 polyolefin resin Polymers 0.000 claims description 7
- 238000002156 mixing Methods 0.000 abstract description 6
- -1 polypropylene Polymers 0.000 abstract description 5
- 229920005989 resin Polymers 0.000 abstract description 5
- 239000011347 resin Substances 0.000 abstract description 5
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 abstract description 3
- 239000004700 high-density polyethylene Substances 0.000 abstract description 3
- 229920001684 low density polyethylene Polymers 0.000 abstract description 3
- 239000004702 low-density polyethylene Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 239000004743 Polypropylene Substances 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 2
- 229920001903 high density polyethylene Polymers 0.000 abstract description 2
- 229920001155 polypropylene Polymers 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 9
- 229920001577 copolymer Polymers 0.000 description 6
- 229910052736 halogen Inorganic materials 0.000 description 5
- 150000002367 halogens Chemical class 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 3
- 229910000000 metal hydroxide Inorganic materials 0.000 description 3
- 150000004692 metal hydroxides Chemical class 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 2
- 239000000347 magnesium hydroxide Substances 0.000 description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 1
- 229920005648 ethylene methacrylic acid copolymer Polymers 0.000 description 1
- 229920006226 ethylene-acrylic acid Polymers 0.000 description 1
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 229920004889 linear high-density polyethylene Polymers 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Inorganic Insulating Materials (AREA)
- Organic Insulating Materials (AREA)
- Insulated Conductors (AREA)
Abstract
Description
本発明は、特に、電線、ケーブルなどの被覆材料や接続
材料として高い難燃効果を有する難燃性の樹脂組成物に
関するものである。The present invention particularly relates to a flame-retardant resin composition that has a high flame-retardant effect as a coating material or connection material for electric wires, cables, etc.
ポリエチレン、ポリプロピレン、エチレン−酢酸ビニル
共重合体、エチレン−プロピレン共重合体などのポリオ
レフィン系樹脂を難燃化するための難燃化技術としては
、ハロゲン系難燃剤を配合する方法や水酸化アルミニウ
ム、水酸化マグネシウムなどの金属水和物を配合する方
法などが知られている。Flame retardant techniques for making polyolefin resins such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, and ethylene-propylene copolymer flame retardant include methods of blending halogen-based flame retardants, aluminum hydroxide, A method of blending a metal hydrate such as magnesium hydroxide is known.
しかしながら、ハロゲン系難燃剤を配合するものでは、
組成物の燃焼時において煙の発生量が多く、また、ハロ
ゲンを含む腐食性ガスが発生するなどの難点がある。
一方、金属水和物を配合するものでは、難燃効果が低い
ため、多量に配合する必要があり、これによって、組成
物の引張強度、伸びなどの機械的特性の低下や耐寒性の
低下などを招く不都合がある。
本発明は、このような従来の実情に鑑みてなされたもの
である。However, those containing halogen flame retardants,
There are disadvantages in that a large amount of smoke is generated when the composition is combusted, and corrosive gas containing halogen is generated. On the other hand, products that contain metal hydrates have a low flame retardant effect, so they must be added in large amounts, which can lead to a decrease in mechanical properties such as tensile strength and elongation, and a decrease in cold resistance. This may cause inconvenience. The present invention has been made in view of such conventional circumstances.
【課題を解決するための手段およびその作用】か＼る本
発明の特徴とする点は、ポリオレフィン系樹脂１００重
量部と、無機難燃剤５０〜２００重量部と、硫化亜鉛１
〜１０重量部とからなる難燃性組成物にある。
つまり、硫化亜鉛の添加によって、難燃性の向上を図っ
たものである。
本発明で使用されるポリオレフィン系樹脂としては、低
密度ポリエチレン（ＬＤＰＥ） 、直鎖状低密度ポリエ
チレン（ＬＬＤＰＥ） 、高密度ポリエチレン（ＨＤＰ
Ｅ）、ポリプロピレン、ポリブテン−１、ポリイソブチ
レン、ポリ４−メチル−１−ペンテンなどのオレフィン
モノマーの単独重合体や、エチレン−エチルアクリレー
ト共重合体（ＥＥＡ） 、エチレン−酢酸ビニル共重合
体（ＥＶＡ）、エチレン−アクリル酸共重合体（ＥＡＡ
）、エチレン−プロピレン共重合体（ＥＰＲ）、エチレ
ン−プロピレン−ジエン共重合体（ＥＰＤ）、エチレン
−ブテン−１−ジエン共重合体、エチレン−ブテン−１
共重合体、エチレン−メタアクリル酸共重合体、アイオ
ノマー樹脂などのオレフィンモノマーをコモノマーとす
る共重合体あるいはこれらの２種以上の混合物などが挙
げられるまた、混合物の場合の混合比は、特に限定され
ず任意である。
また、上記無機難燃剤としては、水酸化アルミニウム、
水酸化マグネシウムなどの金属水酸化物や、クレー、タ
ルク、アルミナ、シリカなどが用いられるが、好ましく
は難燃付与効果が高い金属水酸化物が望ましい。
この無機難燃剤の配合量は、要求される難燃性の度合に
よって異なるが、通常ポリオレフィン系樹脂１００重量
部当たり、５０〜２００重量部とされる。５０重量部未
満ては難燃効果が不足し、２００重量部を越えると組成
物の機械的特性などが急激に低下し、不都合となる。
ここで、本発明では、硫化亜鉛の添加によって難燃性が
改善されるため、この無機難燃剤の配合量は、比較的少
なくてもよく、金属水酸化物においては１００重量部程
度の配合で十分な難燃効果が得られ、この無機難燃剤配
合に起因する機械的特性などの低下も少ないものとなる
。
また、本発明で使用される硫化亜鉛は、上述したように
難燃性を向上させるためのもので、その配合量としては
、ポリオレフィン系樹脂１００重量部に対して１〜１０
重量部とされる。１重量部未満では十分な難燃効果が得
られず、１０重量部を越えると組成物の機械的特性の低
下の度合が大きくなって不都合となる。
このように本発明の組成物にあっては、上記硫化亜鉛の
添加によって、良好な難燃性が得られ、また、同時に無
機難燃剤の存在によってさらに高い難燃性が得られる。
このため、無機難燃剤の配合量を低減することが可能で
あり、高い難燃性を有すると共に、機械的特性、耐寒性
などにも優れた組成物となる。また、組成物中にはハロ
ゲン含有化合物が存在しないので、燃焼時に有害な腐食
性燃焼ガスを発生することもない。
また、本発明の難燃性組成物には、他の難燃剤を併用す
ることも可能であり、これによって、より高度の難燃性
を与えることもできる。このような難燃剤としては、カ
ーボンブラック、赤リンなどが挙げられる。また、組成
物の用途によってはハロゲン系難燃剤を配合してもよい
。
また、本発明の難燃性組成物には、必要に応じて、無機
充填剤、軟化剤、着色剤、老化防止剤、酸化防止剤、安
定剤などの種々の配合剤を所望量添加することができ、
また、他の樹脂をブレンドすることも可能である。
そして、この難燃性組成物は、高速撹拌機、ミキシング
ロールなどの通常の混練手段によって混練された後、押
出機、射出成形機などの成形機によって電線、ケーブル
などの絶縁体やシースなどの樹脂成形品とされる。[Means for Solving the Problems and Their Effects] The characteristics of the present invention are as follows: 100 parts by weight of a polyolefin resin, 50 to 200 parts by weight of an inorganic flame retardant, and 1 part by weight of zinc sulfide.
~10 parts by weight of the flame retardant composition. In other words, the flame retardance is improved by adding zinc sulfide. The polyolefin resins used in the present invention include low density polyethylene (LDPE), linear low density polyethylene (LLDPE), and high density polyethylene (HDP).
E), homopolymers of olefin monomers such as polypropylene, polybutene-1, polyisobutylene, poly4-methyl-1-pentene, ethylene-ethyl acrylate copolymer (EEA), ethylene-vinyl acetate copolymer (EVA), etc. ), ethylene-acrylic acid copolymer (EAA
), ethylene-propylene copolymer (EPR), ethylene-propylene-diene copolymer (EPD), ethylene-butene-1-diene copolymer, ethylene-butene-1
Examples include copolymers, ethylene-methacrylic acid copolymers, copolymers containing olefin monomers such as ionomer resins as comonomers, and mixtures of two or more of these.In addition, in the case of mixtures, the mixing ratio is particularly limited. It is optional. In addition, the above-mentioned inorganic flame retardants include aluminum hydroxide,
Metal hydroxides such as magnesium hydroxide, clay, talc, alumina, silica, etc. are used, but metal hydroxides with a high flame retardant effect are preferably used. The amount of the inorganic flame retardant to be blended varies depending on the degree of flame retardancy required, but is usually 50 to 200 parts by weight per 100 parts by weight of the polyolefin resin. If it is less than 50 parts by weight, the flame retardant effect will be insufficient, and if it exceeds 200 parts by weight, the mechanical properties etc. of the composition will rapidly deteriorate, resulting in disadvantages. Here, in the present invention, since flame retardancy is improved by adding zinc sulfide, the amount of this inorganic flame retardant may be relatively small, and for metal hydroxides, it may be about 100 parts by weight. A sufficient flame retardant effect can be obtained, and there is little deterioration in mechanical properties caused by the inorganic flame retardant formulation. In addition, the zinc sulfide used in the present invention is used to improve flame retardancy as described above, and its blending amount is 1 to 10 parts by weight per 100 parts by weight of the polyolefin resin.
Parts by weight. If it is less than 1 part by weight, a sufficient flame retardant effect cannot be obtained, and if it exceeds 10 parts by weight, the degree of deterioration of the mechanical properties of the composition increases, which is disadvantageous. As described above, in the composition of the present invention, good flame retardancy can be obtained by adding the above-mentioned zinc sulfide, and at the same time, even higher flame retardance can be obtained by the presence of the inorganic flame retardant. Therefore, it is possible to reduce the amount of inorganic flame retardant added, resulting in a composition that has high flame retardancy and is also excellent in mechanical properties, cold resistance, etc. Further, since no halogen-containing compound is present in the composition, no harmful corrosive combustion gas is generated during combustion. Further, it is also possible to use other flame retardants in combination with the flame retardant composition of the present invention, thereby providing a higher degree of flame retardancy. Examples of such flame retardants include carbon black and red phosphorus. Further, depending on the use of the composition, a halogen flame retardant may be added. Furthermore, desired amounts of various compounding agents such as inorganic fillers, softeners, colorants, anti-aging agents, antioxidants, and stabilizers may be added to the flame-retardant composition of the present invention, as necessary. is possible,
It is also possible to blend other resins. This flame-retardant composition is kneaded using ordinary kneading means such as high-speed stirrers and mixing rolls, and then molded into insulators and sheaths for electric wires and cables using molding machines such as extruders and injection molding machines. It is considered to be a resin molded product.
第１表に示した配合組成により難燃性組成物（実施例１
〜５、比較例１〜４）を調整し、押出成形法によって試
験片を作製した。
これらの試験片について引張強度、酸素指数（０、Ｉ）
による難燃性について評価した。なお、酸素指数はＪ
Ｉｓ−に−７２０１に準拠して求めた。これらの結果を
第１表に併記した。
上記第１表から明らかなように、本発明の難燃性組成′
１ｙＪ（実施例１〜５）は、優れた難燃性を示すと共に
、機械的特性の低下が少ないものであることが判る。A flame retardant composition (Example 1) was prepared according to the formulation shown in Table 1.
-5, Comparative Examples 1 to 4) were prepared, and test pieces were produced by extrusion molding. Tensile strength, oxygen index (0, I) for these specimens
The flame retardance was evaluated by In addition, the oxygen index is J
It was determined in accordance with Is-7201. These results are also listed in Table 1. As is clear from Table 1 above, the flame retardant composition of the present invention'
It can be seen that 1yJ (Examples 1 to 5) exhibits excellent flame retardancy and shows little deterioration in mechanical properties.
以上説明したように、本発明の難燃性組成物は、ポリオ
レフィン系樹脂１００重量部と、無機難燃剤５０〜２０
０重量部と、硫化亜鉛１〜１０重量部とからなるもので
、優れた難燃性を発揮すると共に、機械的特性、耐寒性
なども良好であり、かつ、燃焼時に有害な腐食性ガスを
発生することもないなどの効果を有する。As explained above, the flame retardant composition of the present invention contains 100 parts by weight of a polyolefin resin and 50 to 20 parts by weight of an inorganic flame retardant.
0 parts by weight and 1 to 10 parts by weight of zinc sulfide, it exhibits excellent flame retardancy, has good mechanical properties and cold resistance, and does not emit harmful corrosive gases when burned. It has the effect that it never occurs.
Claims (1)
０〜２００重量部と、硫化亜鉛１〜１０重量部とからな
る難燃性組成物。100 parts by weight of polyolefin resin and 5 parts by weight of inorganic flame retardant
A flame retardant composition comprising 0 to 200 parts by weight of zinc sulfide and 1 to 10 parts by weight of zinc sulfide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2318653A JP2869817B2 (en) | 1990-11-24 | 1990-11-24 | Flame retardant composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2318653A JP2869817B2 (en) | 1990-11-24 | 1990-11-24 | Flame retardant composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04189855A true JPH04189855A (en) | 1992-07-08 |
| JP2869817B2 JP2869817B2 (en) | 1999-03-10 |
Family
ID=18101536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2318653A Expired - Fee Related JP2869817B2 (en) | 1990-11-24 | 1990-11-24 | Flame retardant composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2869817B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0794028A (en) * | 1993-09-24 | 1995-04-07 | Hitachi Cable Ltd | Polypropylene-insulated electric wire |
| WO2005056667A1 (en) * | 2003-12-15 | 2005-06-23 | Autonetworks Technologies, Ltd. | Crosslinkable flame-retardant resin composition, and insulated electrical wire and wire harness each obtained with the same |
| WO2006118254A1 (en) * | 2005-04-28 | 2006-11-09 | Autonetworks Technologies, Ltd. | Halogen-free insulated electric wire and wire harness |
| US20130161064A1 (en) * | 2010-09-10 | 2013-06-27 | Autonetworks Technologies, Ltd. | Composition for wire coating material, insulated wire, and wiring harness |
| US9093197B2 (en) | 2010-02-18 | 2015-07-28 | Autonetworks Technologies, Ltd. | Composition for wire coating member, insulated wire, and wiring harness |
-
1990
- 1990-11-24 JP JP2318653A patent/JP2869817B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0794028A (en) * | 1993-09-24 | 1995-04-07 | Hitachi Cable Ltd | Polypropylene-insulated electric wire |
| WO2005056667A1 (en) * | 2003-12-15 | 2005-06-23 | Autonetworks Technologies, Ltd. | Crosslinkable flame-retardant resin composition, and insulated electrical wire and wire harness each obtained with the same |
| WO2006118254A1 (en) * | 2005-04-28 | 2006-11-09 | Autonetworks Technologies, Ltd. | Halogen-free insulated electric wire and wire harness |
| US7586043B2 (en) | 2005-04-28 | 2009-09-08 | Autonetworks Technologies, Ltd. | Non-halogenous insulated wire and a wiring harness |
| US9093197B2 (en) | 2010-02-18 | 2015-07-28 | Autonetworks Technologies, Ltd. | Composition for wire coating member, insulated wire, and wiring harness |
| US20130161064A1 (en) * | 2010-09-10 | 2013-06-27 | Autonetworks Technologies, Ltd. | Composition for wire coating material, insulated wire, and wiring harness |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2869817B2 (en) | 1999-03-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3037713B2 (en) | Flame retardant polymer composition | |
| EP0328051B1 (en) | Flame retardant ethylene polymer blends | |
| WO2012167926A1 (en) | Flame retardant polymer composition | |
| JPH04189855A (en) | Flame-retardant composition | |
| JPS61168644A (en) | Flame-retardant resin composition | |
| JPH0275642A (en) | Flame-retarding composition and wire and cable coated therewith | |
| JP2869809B2 (en) | Flame retardant resin composition | |
| JPS6272735A (en) | Flame-retardant resin composition | |
| JPH03134041A (en) | Flame-retardant resin composition | |
| JPH0611816B2 (en) | Flame-retardant resin composition | |
| JPS6212005A (en) | Flame resisting electric insulator compositioin | |
| JP2001151950A (en) | Flame-retardant resin composition and molded article thereof | |
| JPH03227337A (en) | Flame retardant composition and flame retardant cable | |
| JP2536092B2 (en) | Flame-retardant wire / cable | |
| JPH03182533A (en) | Flame-retarding composition | |
| JPH02158640A (en) | Flame retardant resin composition | |
| JPH03259939A (en) | Flame-retarding resin composition | |
| JPH01141931A (en) | Flame-retardant resin composition | |
| JPH03197539A (en) | Flame-retardant resin composition | |
| JP2003268250A (en) | Nonhalogen flame-retardant composition and flame- retardant power source cord | |
| JPH03131638A (en) | Flame-retardant composition | |
| JPH0489850A (en) | Flame-retarding resin composition | |
| JPH03200852A (en) | Flame-retardant resin composition | |
| KR810001563B1 (en) | Poly-4-methyl pentene-1 composition | |
| JPH01261438A (en) | Flame-retarding composition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |