JPH0384047A - Foaming agent for thermoplastic resin - Google Patents
Foaming agent for thermoplastic resinInfo
- Publication number
- JPH0384047A JPH0384047A JP22064789A JP22064789A JPH0384047A JP H0384047 A JPH0384047 A JP H0384047A JP 22064789 A JP22064789 A JP 22064789A JP 22064789 A JP22064789 A JP 22064789A JP H0384047 A JPH0384047 A JP H0384047A
- Authority
- JP
- Japan
- Prior art keywords
- foaming agent
- freon
- pentafluoroethane
- dichloro
- ozonosphere
- 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
- 229920005992 thermoplastic resin Polymers 0.000 title claims abstract description 16
- 239000004088 foaming agent Substances 0.000 title abstract description 12
- FRCHKSNAZZFGCA-UHFFFAOYSA-N 1,1-dichloro-1-fluoroethane Chemical compound CC(F)(Cl)Cl FRCHKSNAZZFGCA-UHFFFAOYSA-N 0.000 claims abstract description 15
- GTLACDSXYULKMZ-UHFFFAOYSA-N pentafluoroethane Chemical compound FC(F)C(F)(F)F GTLACDSXYULKMZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004604 Blowing Agent Substances 0.000 claims description 23
- 239000006260 foam Substances 0.000 abstract description 15
- 229920005989 resin Polymers 0.000 abstract description 10
- 239000011347 resin Substances 0.000 abstract description 10
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000005187 foaming Methods 0.000 description 11
- 239000000203 mixture Substances 0.000 description 10
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- -1 polypropylene Polymers 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 3
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- DDMOUSALMHHKOS-UHFFFAOYSA-N 1,2-dichloro-1,1,2,2-tetrafluoroethane Chemical compound FC(F)(Cl)C(F)(F)Cl DDMOUSALMHHKOS-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 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 description 1
- 239000004338 Dichlorodifluoromethane Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 229940087091 dichlorotetrafluoroethane Drugs 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 229920001179 medium density polyethylene Polymers 0.000 description 1
- 239000004701 medium-density polyethylene Substances 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920005670 poly(ethylene-vinyl chloride) Polymers 0.000 description 1
- 229920002285 poly(styrene-co-acrylonitrile) Polymers 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000005437 stratosphere Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】 東！Ｌ皇剋里公Ｉ 本発明は、熱可塑性樹脂用発泡剤組成物に関する。[Detailed description of the invention] east! L. Emperor I The present invention relates to a blowing agent composition for thermoplastic resins.
なお、本明細書において、“％”とあるのは、“重量％
”を意味する。In addition, in this specification, "%" means "% by weight"
” means.
従来技術とその問題点
熱可塑性樹脂発泡体の製造に際し使用される発泡剤とし
ては、従来ジクロロジフルオロメタン（フロン−１２）
、ジクロロテトラフルオロエタン（フロン−１１４）な
どのフロン系のものが使用されてきた。しかしながら、
近年、大気中に放出された場合に、ある種のフロンが成
層圏のオゾン層を破壊し、その結果、人類を含む地球上
の生態系に重大な悪影響を及ぼすことが指摘されている
。従って、オゾン層破壊の危険性の高いフロンについて
は、国際的な取決めにより、使用および生産が制限され
るに至っている。上記のフロン−１２などは、この制限
の対象となっており、この点からも、オゾン層破壊問題
を生ずる危険性のない或いはその危険性の低い新たな発
泡剤の開発が必要となっている。Conventional technology and its problems As a blowing agent used in the production of thermoplastic resin foam, dichlorodifluoromethane (Freon-12) has conventionally been used.
, dichlorotetrafluoroethane (Freon-114) and other fluorocarbons have been used. however,
In recent years, it has been pointed out that certain types of fluorocarbons destroy the ozone layer in the stratosphere when released into the atmosphere, and as a result, have a serious negative impact on the earth's ecosystem, including humans. Therefore, international agreements have come to restrict the use and production of fluorocarbons, which pose a high risk of ozone layer depletion. Freon-12 mentioned above is subject to this restriction, and from this point of view as well, there is a need to develop new blowing agents that have no or low risk of causing ozone layer depletion problems. .
上記の如き問題のあるフロンに代えてＬＰＧを使用する
ことも考えられるが、この場合には、気泡の均一な発泡
製品が得られないという大きな問題があり、また爆発と
いう危険性もある。It is conceivable to use LPG instead of the problematic Freon as described above, but in this case, there is a big problem that a foamed product with uniform bubbles cannot be obtained, and there is also a risk of explosion.
問題点を解決するための手段
本発明者は、従来技術における上記の如き問題点に鑑み
て研究を重ねた結果、１．１，２．２゜２−ペンタフル
オロエタンと１，１−ジクロロ−１−フルオロエタンと
からなる組成物が、それぞれの単独からはまったく予想
し難い特異な発泡特性を具備しており、その結果、熱可
塑性樹脂発泡体製造用の発泡剤として優れた効果を発揮
することを見出し、本発明を完成するにいたった。Means for Solving the Problems As a result of repeated research in view of the above-mentioned problems in the prior art, the present inventor has discovered that 1.1, 2.2° 2-pentafluoroethane and 1,1-dichloro- 1-fluoroethane has unique foaming properties that are completely difficult to predict from each component alone, and as a result, it exhibits excellent effects as a foaming agent for producing thermoplastic resin foams. This discovery led to the completion of the present invention.
すなわち、本発明は、下記の組成物を提供するものであ
る：
■１，１，２，２．２−ペンタフルオロエタンと１．１
−ジクロロ−１−フルオロエタンとからなることを特徴
とする熱可塑性樹脂用発泡剤。That is, the present invention provides the following composition: (1) 1,1,2,2.2-pentafluoroethane and 1.1
- dichloro-1-fluoroethane. A blowing agent for thermoplastic resins.
■１，１，２，２．２−ペンタフルオロエタン８０〜４
０％と１，１−ジクロロ−１−フルオロエタン２０〜６
０％とからなる上記項（１）に記載の熱可塑性樹脂用発
泡剤。■1,1,2,2,2-pentafluoroethane 80-4
0% and 1,1-dichloro-1-fluoroethane 20-6
0% of the foaming agent for thermoplastic resins according to item (1) above.
■１．１．２，２．２−ペンタフルオロエタン７０〜５
０％と１，１−ジクロロ−１−フルオロエタン３０〜５
０％とからなる上記項（２）に記載の熱可塑性樹脂用発
泡剤。■1.1.2,2.2-pentafluoroethane 70-5
0% and 1,1-dichloro-1-fluoroethane 30-5
0% of the blowing agent for thermoplastic resins according to item (2) above.
本発明による発泡剤組成物においては、１，１゜２．２
．２−ペンタフルオロエタン（フロン−１２５）と１，
１−ジクロロ−１−フルオロエタン（フロン−１４１ｂ
）とを併用することを必須とする。In the blowing agent composition according to the invention, 1.1°2.2
．． 2-pentafluoroethane (Freon-125) and 1,
1-dichloro-1-fluoroethane (Freon-141b
) must be used in combination with
フロン−１２５とフロン−１４１ｂとの配合割合は、両
者の合計重量を基準として、通常前者：後者＝８０〜４
０：２０〜６０％程度であり、より均一な発泡体を得る
ためには、前者：後者＝７０〜５０ ： ３０〜５０％
程度とすることがさらに好ましい。。フロン−１２５の
割合が、８０％を上回る場合には、発泡不良となるのに
対し、フロン−１４１ｂの割合が、６０％を上回る場合
には、発泡製品の表面外観が劣るものとなる。The blending ratio of Freon-125 and Freon-141b is usually the former: the latter = 80 to 4, based on the total weight of both.
0: about 20-60%, and in order to obtain a more uniform foam, the former: latter = 70-50: 30-50%
It is more preferable to set it as about. . If the percentage of Freon-125 exceeds 80%, foaming will be poor, whereas if the percentage of Freon-141b exceeds 60%, the surface appearance of the foamed product will be poor.
本発明発泡組成物には、必要に応じ、安定化剤を配合す
ることが出来る。The foaming composition of the present invention may contain a stabilizer, if necessary.
本発明の発泡剤組成物は、公知の熱可塑性樹脂発泡体製
造用の発泡剤と同様にして使用することができる。The blowing agent composition of the present invention can be used in the same manner as known blowing agents for producing thermoplastic resin foams.
発泡原料としての熱可塑性樹脂にも、特に制限はない。There are no particular restrictions on the thermoplastic resin used as the foaming raw material.
熱可塑性樹脂としては、より具体的に、ポリスチレン、
スチレンと共重合可能な他のモノマーとからなるポリス
チレン系共重合体（例えば、スチレン−ブタジェン共重
合体、スチレン−アクリロニトリル共重合体、スチレン
−メタクリレート共重合体など）など；低密度ポリエチ
レン（密度＝約０．９１０〜０．９２５ ｇ ／ ｃ
ｃ ） 、中密度ポリエチレン（密度＝約０．９２６〜
０．９４０ ｇ／ ｃ ｃ ） 、高密度ポリエチレン
（密度＝約０．９４１〜０．９６５ｇ／ＣＣ）、アイソ
タクチックポリプロピレン、ポリブテン−１、エチレン
および／またはプロピレンと共重合可能な他のモノマー
とからなるポリオレフィン系共重合体（例えば、プロピ
レン−オクテン−１−エチレン共重合体、エチレン−プ
ロピレン共重合体、エチレン−酢酸ビニル共重合体、エ
チレン−アクリル酸共重合体、エチレン−エチルアクリ
レート共重合体、エチレン−塩化ビニル共重合体など）
などが例示される。More specifically, thermoplastic resins include polystyrene,
Polystyrene copolymers made of styrene and other copolymerizable monomers (e.g., styrene-butadiene copolymers, styrene-acrylonitrile copolymers, styrene-methacrylate copolymers, etc.); low-density polyethylene (density = Approximately 0.910-0.925 g/c
c), medium density polyethylene (density = approximately 0.926~
0.940 g/cc), high-density polyethylene (density = approximately 0.941-0.965 g/CC), isotactic polypropylene, polybutene-1, and other monomers copolymerizable with ethylene and/or propylene. (e.g., propylene-octene-1-ethylene copolymer, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer) (coalescence, ethylene-vinyl chloride copolymer, etc.)
Examples include.
熱可塑性樹脂に対する本発明発泡剤の使用量も、公知の
発泡剤の場合と変わるところはなく、熱可塑性樹脂の種
類、所望の発泡体の密度などにより、適宜決定されるが
、通常熱可塑性樹脂１００ｇに対して、０．００１〜０
．５モル程度である。The amount of the blowing agent of the present invention to be used in the thermoplastic resin is the same as in the case of known blowing agents, and is appropriately determined depending on the type of thermoplastic resin, the density of the desired foam, etc. 0.001 to 0 per 100g
．． It is about 5 moles.
本発明の発泡剤を使用して発泡体を製造する場合にも、
公知の方法と同様にして行なえば良い。When producing a foam using the blowing agent of the present invention,
This may be carried out in the same manner as a known method.
例えば、（ａ）原料樹脂を加熱溶融させ、高温且つ高圧
下に発泡剤を混合し、融解させた後、低圧帯域に押出し
発泡させる方法、（ｂ）原料樹脂を加熱溶融させ・高温
且つ高圧下に発泡剤を混合し、除圧することにより、発
泡させるバッチ方式発泡方法、（Ｃ）原料樹脂を電子線
、化学架橋剤などにより架橋させ、これに発泡剤を添加
して、加熱発泡させる方法などが挙げられる。For example, (a) a method in which raw resin is heated and melted, a foaming agent is mixed under high temperature and high pressure, and after melting, the raw resin is extruded into a low pressure zone and foamed, (b) a method in which raw resin is heated and melted and foamed at high temperature and under high pressure. A batch foaming method in which foaming is performed by mixing a foaming agent with the resin and removing pressure; (C) A method in which the raw material resin is crosslinked using an electron beam, a chemical crosslinking agent, etc., a foaming agent is added thereto, and foaming is performed by heating. can be mentioned.
また、本発明による発泡剤は、シート、ブロック、棒、
管、被覆層（電線、ケーブルなど）、型物成形品などの
任意の形態の発泡製品の製造に利用できる。Further, the blowing agent according to the present invention can be used in sheets, blocks, rods,
It can be used to manufacture foamed products in any form, such as pipes, coatings (wires, cables, etc.), molded products, etc.
発明の効果 本発明によれば、以下のような効果が達成される。Effect of the invention According to the present invention, the following effects are achieved.
本発明で使用するフロン−１２５およびフロン−１４１
ｂは、比較的易分解性であり、オゾン層に到達するまで
に分解され易いので、オゾン破壊を生ずる危険性は、極
めて低い。Freon-125 and Freon-141 used in the present invention
Since b is relatively easily decomposed and easily decomposed before reaching the ozone layer, the risk of causing ozone destruction is extremely low.
また、本発明による発泡剤は、不燃性乃至難燃性なので
、作業上安全である。Further, the blowing agent according to the present invention is non-flammable or flame-retardant, so it is safe to work with.
また、フロン−１２５とフロン−１４１ｂとを混合して
使用する本発明発泡剤は、それぞれを単独で使用する場
合に比して、安定性に優れ且つ極めて均一な発泡体を形
成する。Furthermore, the foaming agent of the present invention using a mixture of Freon-125 and Freon-141b forms a foam with excellent stability and extremely uniformity compared to when each is used alone.
実施例
以下に実施例および比較例を示し、本発明の特徴とする
ところをより一層明らかにする。EXAMPLES Examples and comparative examples are shown below to further clarify the characteristics of the present invention.
実施例１〜５および比較例１〜２ 以下に示す要領でポリエチレンフオームを製造した。Examples 1-5 and Comparative Examples 1-2 Polyethylene foam was produced in the manner shown below.
密度０．９２ｇ ／ ｃ ｃの粒状ポリエチレン１００
ｇにフオーム核発生剤として炭酸カルシウム微粉０．７
ｇを加えて、樹脂原料を調製した。Granular polyethylene 100 with density 0.92g/cc
0.7 g of calcium carbonate fine powder as a foam nucleating agent
g was added to prepare a resin raw material.
第１表に示す割合でフロン−１２５およびフロン−１４
１ｂからなる本発明による発泡剤を調製した。第１表に
は、本発明の組成範囲外の発泡剤をも、比較例狙１〜２
として併せて示す。Freon-125 and Freon-14 in the proportions shown in Table 1
A blowing agent according to the invention consisting of 1b was prepared. Table 1 also shows blowing agents outside the composition range of the present invention.
Also shown as
使用した押出機は、ホッパー、計量部、混合部、圧縮お
よび溶融部、ならびにスクリュー押出部（内径４０＋ｎ
＋＋＋）を主な構成部としており、発泡剤注入孔がシリ
ンダー中央部に設けられている。The extruder used had a hopper, a measuring section, a mixing section, a compression and melting section, and a screw extrusion section (inner diameter 40+n).
+++) is the main component, and a blowing agent injection hole is provided in the center of the cylinder.
ホッパーから押出機内に上記の樹脂原料を投入するとと
もに、シリンダー内の加熱された樹脂原料に対し上記の
発泡剤を発泡剤注入孔を経て注入し、スクリューにより
均一に混合した。発泡剤の使用量は、ポリエチレン１０
０ｇに対し、１５ｇとした。The resin raw material was charged into the extruder from the hopper, and the foaming agent was injected into the heated resin raw material in the cylinder through the foaming agent injection hole and mixed uniformly with a screw. The amount of blowing agent used is polyethylene 10
The weight was set at 15g compared to 0g.
このポリエチレン−フオーム核発生剤−発泡剤混合物は
、発泡剤注入孔から押出機出口に取り付けられたダイス
に至るまでに１３０℃に加熱され、大気圧域に押し出さ
れて、ポリエチレンフオームを形成した。The polyethylene-foam nucleator-blowing agent mixture was heated to 130° C. from the blowing agent injection hole to the die attached to the extruder outlet and extruded into the atmospheric pressure region to form polyethylene foam.
第２表に得られたフオームの物性を示す。Table 2 shows the physical properties of the obtained foam.
第 表 発泡剤組成 （％） ２５ ４１ｂ 実施例Ｎｏ。No. table Blowing agent composition (%) 25 41b Example No.
０ ０ ０ ０ ０ ０ ０ ０ ０ ０ 比較例Ｎｏ。0 0 0 0 0 0 0 0 0 0 Comparative example no.
００ ００ 第２表 密度 安定性 （ｇ／ｃｃ）（室温） 外観 実施例Ｎｏ。00 00 Table 2 Density Stability (g/cc) (room temperature) exterior Example No.
１０゜０４１ ２ ０．０３８ ３ ０．０３６ ４ ０．０３５ ５ ０．０３１ 比較例Ｎｏ。10°041 2 0.038 3 0.036 4 0.035 5 0.031 Comparative example no.
発泡不良
０．０２９ ５７ 表面粗い
１
５
４
４
３
低発泡倍率
均一
均一
比較的均一
表面やや粗い
なお、第２表において、フオームの安定性は、発泡直後
の体積を１００とした場合に、室温で１日間放置した後
の体積比を示す。Poor foaming 0.029 57 Rough surface 1 5 4 4 3 Low foaming ratio Uniform Uniform Relatively uniform Surface Slightly rough Note that in Table 2, the foam stability is calculated at room temperature when the volume immediately after foaming is 100. The volume ratio after being left for one day is shown.
第２表に示す結果から明らかな様に、本発明の発泡剤組
成物を使用する場合には、均一で、収縮も小さく、寸法
安定性に優れた樹脂発泡体力く得られる。As is clear from the results shown in Table 2, when the blowing agent composition of the present invention is used, uniform resin foams with low shrinkage and excellent dimensional stability can be obtained.
これに対し、フロン−１２５単独およびフロン１４１ｂ
単独を使用する場合には、フオーム安定性に欠けたり、
発泡不良となったり、外観上見劣りする製品となったり
する。On the other hand, Freon-125 alone and Freon-141b
When used alone, it may lack form stability or
This may result in poor foaming or a product with inferior appearance.
（以上）(that's all)
Claims (3)
，１−ジクロロ−１−フルオロエタンとからなることを
特徴とする熱可塑性樹脂用発泡剤。(1) 1,1,2,2,2-pentafluoroethane and 1
, 1-dichloro-1-fluoroethane.
〜４０％と１，１−ジクロロ−１−フルオロエタン２０
〜６０％とからなる請求項（１）に記載の熱可塑性樹脂
用発泡剤。(2) 1,1,2,2,2-pentafluoroethane 80
~40% and 1,1-dichloro-1-fluoroethane20
The blowing agent for thermoplastic resins according to claim 1, comprising 60%.
〜５０％と１，１−ジクロロ−１−フルオロエタン３０
〜５０％とからなる請求項（２）に記載の熱可塑性樹脂
用発泡剤。(3) 1,1,2,2,2-pentafluoroethane 70
~50% and 1,1-dichloro-1-fluoroethane 30
The blowing agent for thermoplastic resins according to claim 2, comprising 50%.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22064789A JPH0384047A (en) | 1989-08-28 | 1989-08-28 | Foaming agent for thermoplastic resin |
| EP19900116454 EP0418603A3 (en) | 1989-08-28 | 1990-08-28 | Blowing compositions |
| US07/716,391 US5145606A (en) | 1989-08-28 | 1991-06-17 | Blowing compositions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22064789A JPH0384047A (en) | 1989-08-28 | 1989-08-28 | Foaming agent for thermoplastic resin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0384047A true JPH0384047A (en) | 1991-04-09 |
Family
ID=16754245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22064789A Pending JPH0384047A (en) | 1989-08-28 | 1989-08-28 | Foaming agent for thermoplastic resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0384047A (en) |
-
1989
- 1989-08-28 JP JP22064789A patent/JPH0384047A/en active Pending
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