JPH0320417B2 - - Google Patents
Info
- Publication number
- JPH0320417B2 JPH0320417B2 JP11115983A JP11115983A JPH0320417B2 JP H0320417 B2 JPH0320417 B2 JP H0320417B2 JP 11115983 A JP11115983 A JP 11115983A JP 11115983 A JP11115983 A JP 11115983A JP H0320417 B2 JPH0320417 B2 JP H0320417B2
- Authority
- JP
- Japan
- Prior art keywords
- polyethylene
- foam
- foaming
- crosslinking
- composition
- 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.)
- Expired
Links
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】
本発明はポリエチレン発泡体の製造に供される
ポリエチレン組成物に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to polyethylene compositions for use in the production of polyethylene foams.
従来、ポリエチレン発泡体の製造に、耐熱性等
の物性改良のために、ビニルアルコキシシランを
グラフトさせた架橋性ポリエチレンを用いること
が行われている。 Conventionally, crosslinkable polyethylene grafted with vinyl alkoxysilane has been used in the production of polyethylene foam to improve physical properties such as heat resistance.
そして、この架橋性ポリエチレンの架橋はシラ
ノール縮合触媒の存在下で水分によつて比較的遅
い速度で行われるため、良好な発泡体を得るには
上記架橋性ポリエチレンにシラノール縮合触媒及
び熱分解型発泡剤を加えて混練し、一旦シート状
に押出し、熱水処理して架橋を行わせ、それを加
熱して発泡させるのが通常行われている方法であ
る。しかしながらこの様な方法では、一旦シート
状に成形するため工程が複雑化し、押出機の途中
から発泡剤を注入して押出と同時に発泡を行わせ
るいわゆる一般発泡法により良好な発泡体を得る
ことは困難であり、又、肉厚の大きな発泡体やチ
ユーブ状その他のシート状以外の形状を有する発
泡体を製造することも困難であつた。 Since the crosslinking of this crosslinkable polyethylene is carried out at a relatively slow rate by moisture in the presence of a silanol condensation catalyst, in order to obtain a good foam, it is necessary to add a silanol condensation catalyst and a pyrolytic foam to the crosslinkable polyethylene. A commonly used method is to add an agent, knead it, extrude it into a sheet, treat it with hot water to cause crosslinking, and then heat it to foam it. However, with this method, the process is complicated because the material is first formed into a sheet, and it is difficult to obtain a good foam using the so-called general foaming method, in which a foaming agent is injected midway through the extruder and foaming is performed at the same time as extrusion. It is also difficult to produce foams with large wall thicknesses, tube shapes, or other shapes other than sheet shapes.
本発明は上記の如きビニルアルコキシシラング
ラフトポリエチレンの発泡法にかんがみ、より簡
単にかつシート形状以外の形状物の発泡体も容易
に製造することが出来る改質ポリエチレン発泡体
の製造方法を提供することを目的としてなされた
ものであり、その要旨はビニルアルコキシシラン
グラフトポリエチレン又はビニルアルコキシシラ
ン共重合ポリエチレンと下記一般式で示される架
橋用触媒とが含有されてなることを特徴とする発
泡用ポリエチレン組成物に存する。 In view of the above-mentioned foaming method for vinyl alkoxysilane grafted polyethylene, the present invention provides a method for producing modified polyethylene foam that is simpler and allows for the production of foams in shapes other than sheet shapes. The purpose of this invention is to provide a foaming polyethylene composition comprising vinyl alkoxysilane grafted polyethylene or vinyl alkoxysilane copolymerized polyethylene and a crosslinking catalyst represented by the following general formula. exists in
(R1はアルキル基、R2はC1〜16のアルキル基)
本発明の発泡用ポリエチレン組成物に含有され
るビニルアルコキシシラングラフトポリエチレン
はポリエチレンに、ビニルトリメトキシシラン、
ビニルトリエトキシシラン、ビニルメチルジエト
キシシラン等のビニルアルコキシシランを有機過
酸化物等のラジカル触媒によつてグラフトさせた
ものであり、又、ビニルアルコキシシラン共重合
ポリエチレンは、共重合成分としてエチレンと上
記の如きビニルアルコキシシランを主鎖中に含む
ものである。これらの重合体はいずれもジブチル
スズジラウレートその他のシラノール縮合触媒に
よつて水分の存在下で縮合し架橋が進行するの
で、従来よりポリエチレンの耐熱性向上等の改質
を目的として利用することが知られていたもので
ある。 (R 1 is an alkyl group, R 2 is a C 1-16 alkyl group) The vinyl alkoxysilane grafted polyethylene contained in the foaming polyethylene composition of the present invention includes polyethylene, vinyltrimethoxysilane,
Vinylalkoxysilane such as vinyltriethoxysilane and vinylmethyldiethoxysilane is grafted with a radical catalyst such as an organic peroxide. Vinylalkoxysilane copolymerized polyethylene is a copolymerized polyethylene with ethylene as a copolymerization component. The main chain contains vinylalkoxysilane as described above. All of these polymers condense and crosslink in the presence of moisture using dibutyltin dilaurate or other silanol condensation catalysts, so it has been known that they have been used for the purpose of modifying polyethylene, such as improving its heat resistance. This is what I was looking for.
次に本発明に用いられる前記一般式の化合物
は、前記重合体の架橋用触媒として用いられるも
のであり、該架橋用触媒は従来のシラノール縮合
触媒の如くに水分の存在下によつてアルコキシシ
ラングラフト重合体若しくは共重合体を架橋せし
める作用を有するが、水分が存在しなくとも100
〜150℃程度の加熱でアルコキシシラン含有重合
体の架橋を進行せしめる作用を有している。 Next, the compound of the general formula used in the present invention is used as a crosslinking catalyst for the polymer, and the crosslinking catalyst converts alkoxysilane in the presence of water like a conventional silanol condensation catalyst. It has the effect of crosslinking graft polymers or copolymers, but even in the absence of water,
It has the effect of promoting crosslinking of alkoxysilane-containing polymers by heating to about 150°C.
すなわち、本発明は、前記一般式で示される化
合物の上記の如き熱加橋触媒としての作用が発泡
体の製造に適用されてすぐれた効果が得られるこ
とが初めて見い出されてなされたものである。 That is, the present invention was made based on the discovery for the first time that the above-described action of the compound represented by the general formula as a thermal cross-linking catalyst can be applied to the production of foams to obtain excellent effects. .
なお、前記一般式におけるR1はアルキル基で
あるが、該R1としては炭素数8以下で長鎖型の
アルキル基が好ましく、例えばメチル基、ブチル
基、ノルマルオクチル基などが好適である。 Note that R 1 in the above general formula is an alkyl group, and R 1 is preferably a long-chain alkyl group having 8 or less carbon atoms, such as a methyl group, a butyl group, and a normal octyl group.
本発明に好適に使用される該化合物の具体例と
しては、メチル−スズオキサイド−オクチレート
(CH3−SnO−OCOC7H15)、ノルマルブチル−ス
ズオキサイド−ラウレート(nC4H9−SnO−
OCOC11H23)、ノルマルオクチル−スズオキサイ
ド−ステアレ−ト、ノルマルブチル−スズオキサ
イド−アセテート等が挙げられる。 Specific examples of the compound preferably used in the present invention include methyl-tin oxide-octylate (CH 3 -SnO-OCOC 7 H 15 ), n-butyl-tin oxide-laurate (nC 4 H 9 -SnO-
OCOC 11 H 23 ), normal octyl tin oxide stearate, normal butyl tin oxide acetate, and the like.
そして、該架橋用触媒の使用量としては、ビニ
ルアルコキシシラングラフト又は共重合ポリエチ
レン100重量部に対し、0.005〜0.5重量部とくに
0.01〜0.1重量部用いるのが好適である。 The amount of the crosslinking catalyst to be used is 0.005 to 0.5 parts by weight, especially for 100 parts by weight of vinyl alkoxysilane graft or copolymerized polyethylene.
It is preferable to use 0.01 to 0.1 parts by weight.
又、本発明組成物においては、上記ビニルアル
コキシシラングラフト又は共重合ポリエチレン以
外の例えばポリエチレン等の樹脂成分を存在せし
めることも可能であり、又、樹脂成分以外の添加
剤として、タルクその他の充填剤や着色剤、劣化
防止剤等を添加することも可能である。 Furthermore, in the composition of the present invention, it is also possible to include a resin component other than the above-mentioned vinyl alkoxysilane graft or copolymerized polyethylene, such as polyethylene, and additives other than the resin component may include talc and other fillers. It is also possible to add a colorant, a deterioration inhibitor, etc.
次に本発明組成物を用いてポリエチレン発泡体
を製造するには、ビニルアルコキシシラングラフ
ト又は共重合ポリエチレンと前記架橋用触媒を含
み、必要に応じてその他の樹脂が添加剤が加えら
れた組成物を押出機等で加熱・混練し、これに発
泡性を付与して押出等により形状を付与して発泡
させればよく、これによつて樹脂成分が架橋して
耐熱性等の物性が改善された架橋ポリエチレン発
泡体が得られる。 Next, in order to produce a polyethylene foam using the composition of the present invention, a composition containing a vinyl alkoxysilane graft or copolymerized polyethylene and the above-mentioned crosslinking catalyst, and other resins and additives added as necessary. It is sufficient to heat and knead the resin using an extruder, etc., give it foaming properties, give it a shape by extrusion, etc., and foam it, thereby crosslinking the resin component and improving physical properties such as heat resistance. A crosslinked polyethylene foam is obtained.
例えば、本発明組成物を押出機に供給して押出
機シリンダー内で加熱溶融し、該押出機シリンダ
ーの途中に設けられた注入孔からフレオンガスそ
の他に発泡剤を注入して引続き混練して押出機の
金型から押出すことにより、押出成形時の加熱に
よつて架橋が進行し、かつ発泡剤の作用によつて
押出と同時に発泡して、ポリエチレン架橋発泡体
が一挙に得られるのである。 For example, the composition of the present invention is supplied to an extruder, heated and melted in the extruder cylinder, freon gas or other foaming agent is injected through an injection hole provided in the middle of the extruder cylinder, and then kneaded and extruded. By extruding it from a mold, crosslinking progresses due to heating during extrusion molding, and foaming occurs simultaneously with extrusion due to the action of a foaming agent, so that a polyethylene crosslinked foam can be obtained all at once.
本発明発泡用ポリエチレン組成物は上述の通り
の構成のものであり、とくに特定の構造の架橋用
触媒を含有するものであるから、該組成物に発泡
性を付与して単に加熱成形するという操作だけで
架橋により耐熱性等の物性が改善された改質ポリ
エチレン発泡体を従来の如くに熱水架橋処理の如
き煩瑣な工程を要さずして簡単に製造することが
出来るのであり、とくに本発明組成物は組成物を
発泡剤と共に押出して一挙に発泡成形を行う一段
発泡押出法に適用して種々の形状の発泡体を製造
するのに適したものである。 The polyethylene composition for foaming of the present invention has the above-mentioned structure and contains a crosslinking catalyst with a particular structure, so the process of imparting foamability to the composition and simply heat-molding it is necessary. Modified polyethylene foam with improved physical properties such as heat resistance through crosslinking can be easily produced without the need for complicated processes such as conventional hot water crosslinking treatment. The composition of the invention is suitable for producing foams of various shapes by applying it to a one-stage foam extrusion method in which the composition is extruded together with a foaming agent to perform foam molding all at once.
以下本発明を実施例にもとづいて説明する。 The present invention will be explained below based on examples.
なお、以下において部とある重量部を意味す
る。 In addition, in the following, "part" means a certain part by weight.
実施例
押出機に、ビニルトリメトキシシラングラフト
ポリエチレン95部と、タルク25部、ノルマルブチ
ル−スズオキサイド−ラウレート1部及びポリエ
チレン100部の混合物から調整したペレツト5部
とを混合して供給し、押出機内で加熱混練し、
180℃の押出機シリンダーの途中からフレオン113
をシリンダー内の圧力が50気圧に保たれる様に連
続的に圧入・混合し、これらの混合溶融物を金型
から押出した。押出された溶融物は押出と同時に
発泡を開始し、発泡倍率27.3倍の発泡体が得られ
た。Example A mixture of 95 parts of vinyltrimethoxysilane grafted polyethylene, 5 parts of pellets prepared from a mixture of 25 parts of talc, 1 part of n-butyl-tin oxide-laurate, and 100 parts of polyethylene was fed into an extruder, and extrusion was carried out. Heat and knead in the machine,
Freon 113 from the middle of the extruder cylinder at 180℃
were continuously pressurized and mixed so that the pressure inside the cylinder was maintained at 50 atm, and the mixed melt was extruded from the mold. The extruded melt started foaming at the same time as extrusion, and a foam with a foaming ratio of 27.3 times was obtained.
この発泡体について、架橋ゲル分率(押出され
た発泡体をそのまゝ試料として用いて120℃のキ
シレンで24時間抽出し、抽出されなかつた樹脂分
の試料片に対する重量比率を%で表示した)を測
定した所、80.6%であつた。 Regarding this foam, the crosslinked gel fraction (the extruded foam was used as a sample and extracted with xylene at 120°C for 24 hours, and the weight ratio of the unextracted resin to the sample piece was expressed in %) ), it was 80.6%.
又、該発泡体につき、120℃に3時間加熱した
のちの体積を測定し、体積維持率を求めた所、
94.1%であつた。 In addition, the volume of the foam was measured after heating it to 120°C for 3 hours, and the volume retention rate was determined.
It was 94.1%.
比較例
ノルマルブチル−スズオキサイド−ラウレート
の代りに、ジブチルスズジラウレート1部をペレ
ツト調整の際に用いた以外は実施例1と同様にし
て押出機から溶融物を押出して発泡倍率28.1倍の
発泡体を得た。この発泡体につき、実施例1と同
様にして架橋ゲル分率及び体積維持率を求めた
所、架橋ゲル分率は1.4%、体積維持率は22%で
あつた。Comparative Example The melt was extruded from an extruder in the same manner as in Example 1 except that 1 part of dibutyltin dilaurate was used in pellet preparation instead of n-butyl-tin oxide-laurate to produce a foam with an expansion ratio of 28.1 times. Obtained. The crosslinked gel fraction and volume retention rate of this foam were determined in the same manner as in Example 1, and the crosslinked gel fraction was 1.4% and the volume retention rate was 22%.
Claims (1)
ン又はビニルアルコキシシラン共重合ポリエチレ
ンと下記一般式で示される架橋用触媒とが含有さ
れてなることを特徴とする発泡用ポリエチレン組
成物。 (R1はアルキル基、R2はC1〜16のアルキル基)[Scope of Claims] 1. A polyethylene composition for foaming, characterized in that it contains vinylalkoxysilane grafted polyethylene or vinylalkoxysilane copolymerized polyethylene and a crosslinking catalyst represented by the following general formula. (R 1 is an alkyl group, R 2 is a C 1-16 alkyl group)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11115983A JPS601237A (en) | 1983-06-20 | 1983-06-20 | Foaming polyethylene composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11115983A JPS601237A (en) | 1983-06-20 | 1983-06-20 | Foaming polyethylene composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS601237A JPS601237A (en) | 1985-01-07 |
| JPH0320417B2 true JPH0320417B2 (en) | 1991-03-19 |
Family
ID=14553970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11115983A Granted JPS601237A (en) | 1983-06-20 | 1983-06-20 | Foaming polyethylene composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS601237A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3782458B2 (en) * | 1995-09-29 | 2006-06-07 | ザ ダウ ケミカル カンパニー | Cross-linked polyolefin foam and method for producing the same |
| AUPR672901A0 (en) * | 2001-07-31 | 2001-08-23 | Compco Pty Ltd | Methods of recycling and/or upgrading olefin polymers and/or copolymers |
-
1983
- 1983-06-20 JP JP11115983A patent/JPS601237A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS601237A (en) | 1985-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4247667A (en) | Method of crosslinking poly-α-olefin series resins | |
| US3646155A (en) | Cross-linking of a polyolefin with a silane | |
| JP5346285B2 (en) | Polyolefin thermoplastic vulcanized elastomer | |
| JPS6223777B2 (en) | ||
| DE2310040A1 (en) | FOAMABLE POLYMER COMPOSITION | |
| JPH0554872B2 (en) | ||
| JPS58132032A (en) | Crosslinkable composition and crosslinked product obtained therefrom | |
| CN107936441A (en) | A kind of method of two-step method silane natural-crosslinked polyethylene | |
| JPH10195268A (en) | Impact modified poly (vinyl chloride) showing improved low temperature melting | |
| JPH0320417B2 (en) | ||
| AU603786B2 (en) | Crosslinked silane-functional vinylidene chloride polymer and films or foams therefrom | |
| CN104761804B (en) | A kind of foamable composite and product therefrom | |
| US4320214A (en) | Method of making silane-modified ethylene-type resin | |
| US5686546A (en) | Cross-linkable polymer composition containing a carboxylic acid precursor as a catalyst | |
| JP2000343583A (en) | Method for producing cross-linked polyethylene pipe | |
| JP2505543B2 (en) | Method for producing foam containing crystalline propylene resin | |
| JP3022591B2 (en) | Method for producing modified ethylene vinyl acetate copolymer | |
| KR0139146B1 (en) | A method for manufacutring high-performance midsoles | |
| RU2777646C2 (en) | Material replacing rubber, containing terpolymers | |
| ITMI950026A1 (en) | ELASTOMERIC THERMOPLASTIC COMPOSITION | |
| JP3922786B2 (en) | Method for producing highly cross-linked polyolefin resin foam | |
| KR100853430B1 (en) | Thermoplastic elastomer with improved resilience | |
| CN118931093A (en) | A thermoplastic elastomer material for automobile interior with high light color fastness and preparation method thereof | |
| JPS60262829A (en) | Production of heat-shrinkable polyolefin tube | |
| JPS6058251B2 (en) | Method for producing silane crosslinked polyolefin molded product |