JPH09151268A - Flame-retardant polyolefin resin foam - Google Patents

Flame-retardant polyolefin resin foam

Info

Publication number
JPH09151268A
JPH09151268A JP31133695A JP31133695A JPH09151268A JP H09151268 A JPH09151268 A JP H09151268A JP 31133695 A JP31133695 A JP 31133695A JP 31133695 A JP31133695 A JP 31133695A JP H09151268 A JPH09151268 A JP H09151268A
Authority
JP
Japan
Prior art keywords
flame
vinyl acetate
phosphorus
ethylene
pts
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
Application number
JP31133695A
Other languages
Japanese (ja)
Inventor
Kenji Iuchi
謙治 居内
Masaki Tono
正樹 戸野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP31133695A priority Critical patent/JPH09151268A/en
Publication of JPH09151268A publication Critical patent/JPH09151268A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To obtain a flame-retardant polyolefin resin foam improved in flame retardance and appearance by compounding a resin component mainly comprising an ethylene-vinyl acetate copolymer with a hydrated metal compd., a specific phosphorus flame retardant, and a blowing agent and cross-linking and foaming the resultant compsn. SOLUTION: A hundred (100) pts.wt. component mainly comprising an ethylene-vinyl acetate copolymer having a vinyl acetate unit content of 5-20wt.% and a melt index of 1-15g/10min is compounded with 50-200 pts.wt. hydrated metal compd., five (5)-100 pts.wt. phosphorus flame retardant contg. at least two phosphorus compds. having thermal decomposition points different from each other by at least 5 deg.C, and 15-30 pts.wt. thermally decomposable blowing agent. The resultant resin compsn. is melt kneaded, formed into a sheet, cross linked by the exposure to an ionizing radiation of 1-10 Mrad, and foamed under heating at the decomposition point of the blowing agent or higher in a hot air oven.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、難燃性ポリオレフ
ィン系樹脂発泡体に関するものである。
TECHNICAL FIELD The present invention relates to a flame-retardant polyolefin resin foam.

【0002】[0002]

【従来の技術】従来より、樹脂発泡体は、一般に、建築
材料、自動車等の輸送機器、包装材料、家庭用日用品、
その他広範囲の用途に使用されている。その中でも、ポ
リオレフィン系樹脂発泡体は、化学的安定性、断熱性、
電気絶縁性、軽量性等の特性を有しているため、広い分
野で好適に使用されている。しかしながら、ポリオレフ
ィン系樹脂発泡体は、本来、燃焼し易いものが多く、近
年用途の拡大に伴い難燃材料としての性能が要求される
ようになり、各種の方法で難燃化処理が行われている。
2. Description of the Related Art Conventionally, resin foams have generally been used for building materials, transportation equipment such as automobiles, packaging materials, household daily necessities,
It is used in a wide range of other applications. Among them, polyolefin resin foams have chemical stability, heat insulation,
Since it has properties such as electric insulation and lightness, it is preferably used in a wide range of fields. However, many polyolefin-based resin foams are inherently easy to burn, and in recent years the performance as a flame-retardant material has been required with the expansion of applications, and flame-retardant treatment is performed by various methods. There is.

【0003】ポリオレフィン樹脂を難燃化する方法とし
ては、一般的にハロゲン含有化合物を添加する方法が用
いられている。しかしながら、このような方法では、成
形加工性や成形体の機械的強度の低下を比較的少なくし
て、高度の難燃性を付与することはできるが、成形加工
時や燃焼時に多量の煙を発生することがあり、機器を腐
食する恐れがあるため、除害設備を必要とすることがあ
った。そのため、最近では、ハロゲン含有化合物を使用
しないノンハロゲン系の物質による難燃性付与が強く要
望されている。
As a method of making a polyolefin resin flame-retardant, a method of adding a halogen-containing compound is generally used. However, in such a method, although it is possible to impart a high degree of flame retardancy by relatively reducing the deterioration of the molding workability and the mechanical strength of the molded body, a large amount of smoke is generated during the molding processing and combustion. Occasionally, there is a risk of corroding the equipment, and therefore, an abatement facility was sometimes required. Therefore, recently, it has been strongly desired to impart flame retardancy by using a non-halogen-based substance that does not use a halogen-containing compound.

【0004】このような状況の中で、ハロゲン含有化合
物を使用せずに難燃化する方法としては、水酸化アルミ
ニウム、水酸化マグネシウム、塩基性炭酸マグネシウム
等を用いる方法が、例えば、特開平3−269029号
公報に開示されている。
Under these circumstances, a method of using flame retardant without using a halogen-containing compound is a method of using aluminum hydroxide, magnesium hydroxide, basic magnesium carbonate, etc. It is disclosed in Japanese Patent No. 269029.

【0005】しかしながら、これらの水和金属酸化物の
みの添加で易燃性であるポリオレフィン樹脂に十分な難
燃性を付与するためには、多量の水和金属酸化物を添加
する必要があり、その結果、得られる成形体の諸物性が
低下すると共に発泡性にも悪影響を及ぼし、微細な独立
気泡構造を有する柔軟な発泡体を得ることは困難であっ
た。
However, in order to impart sufficient flame retardancy to the polyolefin resin which is easily flammable by adding only these hydrated metal oxides, it is necessary to add a large amount of hydrated metal oxides. As a result, it is difficult to obtain a flexible foam having a fine closed cell structure, since the physical properties of the obtained molded article are deteriorated and the foamability is adversely affected.

【0006】また、ポリオレフィン系樹脂の難燃剤とし
て、ポリリン酸アンモニウムを用いることは、公知の方
法であるが、ポリリン酸アンモニウム単独では十分な難
燃性を付与することは困難であった。
Further, although it is a known method to use ammonium polyphosphate as a flame retardant for polyolefin resins, it has been difficult to impart sufficient flame retardancy with ammonium polyphosphate alone.

【0007】[0007]

【発明が解決しようとする課題】本発明の目的は、以上
の問題点を解決し、その目的は、ハロゲン含有化合物を
全く使用せずに優れた難燃性を付与することにより、燃
焼時に煙の発生がなく、かつ外観の優れた難燃性ポリオ
レフィン系樹脂発泡体を提供することにある。
SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to provide excellent flame retardance without using any halogen-containing compound, thereby producing smoke during combustion. It is intended to provide a flame-retardant polyolefin-based resin foam which is free from the occurrence of and has an excellent appearance.

【0008】[0008]

【課題を解決するための手段】本発明の難燃性ポリオレ
フィン系樹脂発泡体は、エチレン−酢酸ビニル共重合体
を主成分とする樹脂成分、水和金属化合物、熱分解温度
の異なるリン含有化合物を少なくとも2種含むリン系難
燃剤ならびに発泡剤からなる樹脂組成物が架橋させられ
た後、該発泡剤の分解温度以上に加熱されて発泡させら
れていることを特徴とするものである。
The flame-retardant polyolefin resin foam of the present invention comprises a resin component containing an ethylene-vinyl acetate copolymer as a main component, a hydrated metal compound, and phosphorus-containing compounds having different thermal decomposition temperatures. A resin composition comprising a phosphorus-based flame retardant containing at least two of the above and a foaming agent is crosslinked, and then heated to a temperature equal to or higher than the decomposition temperature of the foaming agent to foam.

【0009】本発明で用いられる樹脂組成物は、エチレ
ン−酢酸ビニル共重合体を主成分とする樹脂成分、水和
金属化合物、リン含有化合物ならびに発泡剤からなる。
The resin composition used in the present invention comprises a resin component containing an ethylene-vinyl acetate copolymer as a main component, a hydrated metal compound, a phosphorus-containing compound and a foaming agent.

【0010】上記エチレン−酢酸ビニル共重合体として
は、エチレン−酢酸ビニル共重合体の他、エチレン−酢
酸ビニル共重合体と他のポリオレフィン系樹脂との混合
物であってもよい。
The ethylene-vinyl acetate copolymer may be an ethylene-vinyl acetate copolymer or a mixture of an ethylene-vinyl acetate copolymer and another polyolefin resin.

【0011】上記エチレン−酢酸ビニル共重合体と混合
される他のポリオレフィン系樹脂としては、例えば、ポ
リエチレン、ポリプロピレン、ポリブテン等のα−オレ
フィン;エチレン−プロピレン共重合体、エチレン−プ
ロピレン−ジエン三元共重合体、エチレン−エチルアク
リレート共重合体、エチレン−ブテン共重合体、エチレ
ン−ブテン−ジエン三元共重合体等のエチレン系共重合
体が挙げられ、これらは単独で使用されてもよく、二種
以上が併用されてもよい。
Other polyolefin resins mixed with the above ethylene-vinyl acetate copolymer include, for example, α-olefins such as polyethylene, polypropylene and polybutene; ethylene-propylene copolymer and ethylene-propylene-diene ternary. Copolymers, ethylene-ethyl acrylate copolymers, ethylene-butene copolymers, ethylene-butene-diene terpolymers and the like ethylene-based copolymers such as terpolymers, may be used alone, Two or more kinds may be used in combination.

【0012】上記エチレン−酢酸ビニル共重合体が単独
で用いられる場合は、酢酸ビニルの含有量は、少なくな
ると難燃剤(特に後述の水和金属化合物)の混入が難し
くなり、多くなると溶融粘度が増加して成形性が悪くな
り、さらに溶融混練時に酢酸が遊離して共重合体の劣化
が起こり物性が低下するので、5〜20重量%が好まし
い。
When the above ethylene-vinyl acetate copolymer is used alone, if the content of vinyl acetate decreases, it becomes difficult to mix the flame retardant (particularly the hydrated metal compound described below), and if it increases, the melt viscosity increases. The amount is preferably 5 to 20% by weight because the amount is increased to deteriorate the moldability, and further, acetic acid is liberated during melt-kneading to deteriorate the copolymer to lower the physical properties.

【0013】また、上記エチレン−酢酸ビニル共重合体
が他のポリオレフィン系樹脂との混合物で用いられる場
合は、該混合物中の酢酸ビニル含有量が、上記5〜20
重量%の範囲となるように調節するのが好ましい。
When the ethylene-vinyl acetate copolymer is used in a mixture with other polyolefin resin, the vinyl acetate content in the mixture is 5 to 20.
It is preferable to adjust the content to be in the range of% by weight.

【0014】上記エチレン−酢酸ビニル共重合体のメル
トインデックス(ASTM D1238に準拠して測定
される値であり、以下「MI」という)は、小さくなる
と溶融粘度が高くなるため成形性が悪くなり、大きくな
ると得られる樹脂発泡体の物性が低下するので、1〜1
5g/10分が好ましい。
When the melt index (the value measured according to ASTM D1238, hereinafter referred to as "MI") of the above ethylene-vinyl acetate copolymer is smaller, the melt viscosity becomes higher and the moldability becomes worse. Since the physical properties of the resin foam obtained when it becomes large are deteriorated, 1 to 1
5 g / 10 min is preferred.

【0015】上記水和金属化合物としては、例えば、水
酸化アルミニウム、水酸化マグネシウム、塩基性炭酸マ
グネシウム、水酸化カルシウム、水酸化バリウム等が挙
げられ、これらは単独で使用されてもよく、二種以上が
併用されてもよい。これらの中で、特に水酸化アルミニ
ウムと水酸化マグネシウムとを併用することによって、
より高い難燃性を得ることができる。
Examples of the hydrated metal compound include aluminum hydroxide, magnesium hydroxide, basic magnesium carbonate, calcium hydroxide, barium hydroxide, etc. These may be used alone or in combination of two kinds. The above may be used in combination. Among these, especially by using aluminum hydroxide and magnesium hydroxide together,
Higher flame retardancy can be obtained.

【0016】本発明で用いられる樹脂組成物において、
上記水和金属化合物の使用量は、少なくなると十分な難
燃性が得られず、多くなると得られる樹脂発泡体の機械
的強度が低下するので、エチレン−酢酸ビニル共重合体
を主成分とする樹脂成分100重量部に対して50〜2
00重量部に制限される。
In the resin composition used in the present invention,
If the amount of the hydrated metal compound used is too small, sufficient flame retardancy cannot be obtained, and if the amount is too large, the mechanical strength of the resulting resin foam is reduced. Therefore, an ethylene-vinyl acetate copolymer is used as a main component. 50 to 2 with respect to 100 parts by weight of the resin component
Limited to 100 parts by weight.

【0017】上記リン系難燃剤としては、熱分解温度の
異なるリン含有化合物を少なくとも2種含むものであっ
て、そのうちの1種はポリリン酸アンモニウムであるこ
とが好ましい。また、上記熱分解温度の異なるリン含有
化合物の熱分解温度の差は5℃以上であることが好まし
い。また、上記ポリリン酸アンモニウムとしては、重合
度200〜1,000の範囲が好ましく、さらに、その
表面がメラミン/ホルムアルデヒド樹脂等で被覆された
粉末状で、流動性がよく、水に難溶性のものを用いるこ
とが好ましい。
The above-mentioned phosphorus-based flame retardant contains at least two phosphorus-containing compounds having different thermal decomposition temperatures, and one of them is preferably ammonium polyphosphate. Further, the difference in the thermal decomposition temperature of the phosphorus-containing compounds having different thermal decomposition temperatures is preferably 5 ° C. or more. The ammonium polyphosphate preferably has a degree of polymerization of 200 to 1,000, and has a powdery surface coated with a melamine / formaldehyde resin or the like and has good fluidity and is hardly soluble in water. Is preferably used.

【0018】上記ポリリン酸アンモニウム以外のリン含
有化合物としては、例えば、トリフェニルホスフェー
ト、オクチルジフェニルホスフェート、トリオクチルホ
スフェート、トリクレジルホスフェート、トリキシリル
ホスフェート等のリン酸エステル;メチルホスホン酸、
エチルホスホン酸、イソプロピルホスホン酸、n−ブチ
ルホスホン酸、t−ブチルホスホン酸、フェニルホスホ
ン酸等の各種ホスホン酸;リン酸ナトリウム、リン酸カ
リウム、リン酸マグネシウム、リン酸亜鉛、リン酸アル
ミニウム等のリン酸の金属塩などが挙げられ、これらは
単独で使用されてもよく、二種以上が併用されてもよ
い。
Examples of phosphorus-containing compounds other than the above ammonium polyphosphates include phosphoric acid esters such as triphenyl phosphate, octyldiphenyl phosphate, trioctyl phosphate, tricresyl phosphate, trixylyl phosphate; methylphosphonic acid,
Various phosphonic acids such as ethylphosphonic acid, isopropylphosphonic acid, n-butylphosphonic acid, t-butylphosphonic acid, phenylphosphonic acid; sodium phosphate, potassium phosphate, magnesium phosphate, zinc phosphate, aluminum phosphate, etc. Examples thereof include metal salts of phosphoric acid, which may be used alone or in combination of two or more kinds.

【0019】上記リン系難燃剤として、2種以上のリン
含有化合物を併用することにより、リン含有化合物の加
熱によって形成する難燃性被膜の生成温度が広くなり、
広い温度範囲にわたって優れた難燃効果が得られる。
By using two or more phosphorus-containing compounds in combination as the phosphorus-based flame retardant, the temperature at which the flame-retardant coating formed by heating the phosphorus-containing compound is widened,
Excellent flame retardant effect is obtained over a wide temperature range.

【0020】上記樹脂組成物において、リン系難燃剤の
使用量は、少なくなると発泡体に十分な難燃性を付与す
ることができず、多くなると樹脂組成物の溶融粘度が増
加して高倍率の発泡体が得られなくなるので、上記樹脂
成分100重量部に対して5〜100重量部に制限され
る。
In the above resin composition, when the amount of the phosphorus-based flame retardant used is small, it is not possible to impart sufficient flame retardancy to the foam, and when the amount is large, the melt viscosity of the resin composition increases and the high magnification ratio is increased. The foam is not obtained, so the amount is limited to 5 to 100 parts by weight with respect to 100 parts by weight of the resin component.

【0021】上記樹脂組成物において、ポリリン酸アン
モニウムと他のリン含有化合物を併用する場合のポリリ
ン酸アンモニウムの使用量は、少なくなると得られる発
泡体の難燃性が不足し、多くなると得られる発泡体の機
械的強度が低下するので、上記樹脂成分100重量部に
対して4〜80重量部が好ましい。
In the above resin composition, when ammonium polyphosphate is used in combination with another phosphorus-containing compound, the amount of ammonium polyphosphate used is small, the flame retardancy of the resulting foam is insufficient, and the amount is large. Since the mechanical strength of the body decreases, it is preferably 4 to 80 parts by weight with respect to 100 parts by weight of the resin component.

【0022】また、上記樹脂組成物において、ポリリン
酸アンモニウム(A)以外のリン含有化合物(B)の使
用量は、少なくなると発泡体難燃性が不足し、多くなる
と樹脂組成物の溶融粘度が上昇して高発泡倍率の発泡体
を得ることが困難となるので、ポリリン酸アンモニウム
(A)とリン含有化合物(B)の使用比率は、100:
1〜1:10(重量比)が好ましい。
In the above resin composition, when the amount of the phosphorus-containing compound (B) other than ammonium polyphosphate (A) used is small, the flame retardancy of the foam is insufficient, and when it is too large, the melt viscosity of the resin composition is increased. Since it becomes difficult to obtain a foam having a high expansion ratio, the usage ratio of ammonium polyphosphate (A) and phosphorus-containing compound (B) is 100:
1 to 1:10 (weight ratio) is preferable.

【0023】上記発泡剤としては、熱分解型発泡剤が好
ましく、例えば、アゾジカルボンアミド、ベンゼンスル
ホニルヒドラジド、N,N'-ジニトロソペンタメチレン
テトラミン、トルエンスルホニルヒドラジド、4,4'-
オキシビス(ベンゼンスルホニルヒドラジド)等の熱分
解型有機発泡剤;重炭酸ナトリウム、炭酸アンモニウム
等の熱分解型無機発泡剤が挙げられる。
The above-mentioned foaming agent is preferably a thermal decomposition type foaming agent, for example, azodicarbonamide, benzenesulfonyl hydrazide, N, N'-dinitrosopentamethylenetetramine, toluenesulfonyl hydrazide, 4,4'-.
Pyrolysis-type organic foaming agents such as oxybis (benzenesulfonyl hydrazide); Pyrolysis-type inorganic foaming agents such as sodium bicarbonate and ammonium carbonate.

【0024】上記樹脂組成物において、熱分解型発泡剤
の使用量は、少なくなると所定の発泡倍率の発泡体が得
られず、多くなると部分的に巨大な気泡ができるなど、
均一な発泡体が得られなくなるので、上記樹脂成分10
0重量部に対して15〜30重量部が好ましい。
In the above resin composition, when the amount of the pyrolyzable foaming agent used is small, a foam having a predetermined expansion ratio cannot be obtained, and when the amount is large, huge bubbles are partially formed.
Since a uniform foam cannot be obtained, the resin component 10
15 to 30 parts by weight is preferable with respect to 0 parts by weight.

【0025】上記樹脂組成物には、良好な発泡体を得る
ために、発泡助剤が添加されもよい。発泡助剤として
は、尿素系化合物、ほう砂、エタノールアミン、酸化亜
鉛、脂肪酸金属塩等が挙げられ、その添加量は、上記樹
脂成分100重量部に対して0.1〜5重量部が好まし
い。
A foaming aid may be added to the resin composition in order to obtain a good foam. Examples of the foaming aid include urea compounds, borax, ethanolamine, zinc oxide, and fatty acid metal salts, and the addition amount thereof is preferably 0.1 to 5 parts by weight with respect to 100 parts by weight of the resin component. .

【0026】上記樹脂組成物には、さらに必要に応じ
て、該樹脂組成物の発泡特性や物性を損なわない範囲
で、フェノール系、リン系、イオウ系、アミン系等の酸
化防止剤、金属害防止剤、充填剤、帯電防止剤、安定
剤、架橋剤、滑剤、軟化剤、顔料等が添加されてもよ
い。
The above-mentioned resin composition may further contain, if necessary, a phenol-based, phosphorus-based, sulfur-based, amine-based antioxidant or the like, and a metal damage as long as the foaming characteristics and physical properties of the resin composition are not impaired. Inhibitors, fillers, antistatic agents, stabilizers, crosslinking agents, lubricants, softeners, pigments and the like may be added.

【0027】本発明では、上記樹脂組成物に架橋が施さ
れる。架橋方法としては、電離性放射線を照射する方法
が好ましい。上記電離性放射線としては、電子線、γ
線、X線、中性子線等が挙げられるが、この中で電子線
が最も好ましく、その照射線量は1〜10Mradが好
ましい。
In the present invention, the above resin composition is crosslinked. As the crosslinking method, a method of irradiating with ionizing radiation is preferable. Examples of the ionizing radiation include electron beams and γ
Rays, X-rays, neutron rays and the like can be mentioned. Among them, electron beams are most preferable, and the irradiation dose thereof is preferably 1 to 10 Mrad.

【0028】上記樹脂組成物は、例えば、各成分を、単
軸押出機、二軸押出機、バンバリーミキサー、ニーダー
ミキサー、ロール等の混練装置を用いて溶融混練するこ
とにより得られる。次いで、この樹脂組成物を押出機、
カレンダーロール等を用いてシート状に成形し、得られ
た発泡性シート状物に電離性放射線を照射して架橋させ
た後、熱風炉中で加熱発泡させることにより、樹脂発泡
体が得られる。上記電離性放射線の照射と加熱発泡は、
連続して行ってもよく、バッチ式で行ってもよい。
The above resin composition can be obtained, for example, by melt-kneading the respective components using a kneading device such as a single-screw extruder, a twin-screw extruder, a Banbury mixer, a kneader mixer or a roll. Then, this resin composition is an extruder,
A resin foam is obtained by molding into a sheet using a calender roll or the like, irradiating the obtained foamable sheet with ionizing radiation to crosslink, and then heat-foaming in a hot air oven. Irradiation of the above-mentioned ionizing radiation and heat foaming,
It may be carried out continuously or batchwise.

【0029】[0029]

【発明の実施の形態】以下に、実施例を示すが、本発明
はこれによって限定されるものではない。 (実施例1〜5、比較例1〜5)表1及び表2に示した
所定量の、樹脂成分(エチレン−酢酸ビニル共重合体、
低密度ポリエチレン、線状低密度ポリエチレン)、水和
金属化合物、リン含有化合物、無機酸化物、滑剤、架橋
助剤及び発泡剤を、140℃のロールで混練して樹脂組
成物を得た後、この樹脂組成物を140℃の成形温度で
プレスして、厚さ1mmの発泡性シート状物を成形し
た。次いで、この発泡性シート状物に電子線加速機を用
いて吸収線量が3Mradに相当する線量を照射して架
橋させた後、発泡性シート状物を240℃のオーブン中
に入れ、加熱発泡させ樹脂発泡体を得た。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is described below by way of examples, but the present invention is not limited thereto. (Examples 1 to 5 and Comparative Examples 1 to 5) Resin components (ethylene-vinyl acetate copolymer, a predetermined amount of which are shown in Tables 1 and 2)
Low-density polyethylene, linear low-density polyethylene), a hydrated metal compound, a phosphorus-containing compound, an inorganic oxide, a lubricant, a crosslinking aid and a foaming agent are kneaded with a roll at 140 ° C. to obtain a resin composition, This resin composition was pressed at a molding temperature of 140 ° C. to mold a foamable sheet material having a thickness of 1 mm. Next, this foamable sheet material was irradiated with a dose corresponding to an absorbed dose of 3 Mrad using an electron beam accelerator to crosslink, and then the foamable sheet material was placed in an oven at 240 ° C. and heat-foamed. A resin foam was obtained.

【0030】上記実施例及び比較例で得られた樹脂発泡
体につき、下記の性能評価を行い、その結果を表1〜2
に示した。 (1)発泡倍率 樹脂発泡体の比重を測定し、その逆数を発泡倍率とし
た。
The following performance evaluations were carried out on the resin foams obtained in the above Examples and Comparative Examples, and the results are shown in Tables 1-2.
It was shown to. (1) Expansion ratio The specific gravity of the resin foam was measured, and the reciprocal thereof was taken as the expansion ratio.

【0031】(2)燃焼性試験 JIS D1201の燃焼試験に準拠して酸素指数を測
定し、酸素指数32以上を○、32未満を×とした。
(2) Flammability test The oxygen index was measured in accordance with the JIS D1201 combustion test.

【0032】(3)外観検査 目視観察により、発泡むらのないものを○、発泡むらの
あるものを×と評価した。
(3) Appearance Inspection By visual observation, those having no unevenness of foaming were evaluated as ◯, and those having unevenness of foaming were evaluated as x.

【0033】[0033]

【表1】 [Table 1]

【0034】[0034]

【表2】 [Table 2]

【0035】尚、比較例5では、難燃剤の混入が非常に
困難なため、発泡性シート状物を作製することができな
かった。
In Comparative Example 5, since it was very difficult to mix the flame retardant, a foamable sheet could not be produced.

【0036】表1及び2で使用した各成分は下記の通り
である。 ・EVA:エチレン−酢酸ビニル共重合体(酢酸ビニル
含有量19重量%、密度=0.94g/cm3 、MI=
2.5g/10分) ・LDPE:低密度ポリエチレン(密度=0.92g/
cm3 、MI=3.4g/10分) ・LLDPE:直鎖状低密度ポリエチレン(密度=0.
94g/cm3 、MI=7g/10分)
The components used in Tables 1 and 2 are as follows. EVA: ethylene-vinyl acetate copolymer (vinyl acetate content 19% by weight, density = 0.94 g / cm 3 , MI =
2.5 g / 10 minutes) LDPE: Low density polyethylene (density = 0.92 g /
cm 3 , MI = 3.4 g / 10 min) LLDPE: Linear low-density polyethylene (density = 0.
94 g / cm 3 , MI = 7 g / 10 minutes)

【0037】・水酸化アルミニウム:日本軽金属社製
「B703S」 ・水酸化マグネシウム:協和化学社製「キスマ5A」 ・ポリリン酸アンモニウム:ヘキスト社製「AP42
2」 ・フェニルホスホン酸:和光純薬社製 ・n−ブチルホスホン酸:Aldrich社製 ・t−ブチルホスホン酸:Aldrich社製 ・トリフェニルホスフェートlAidrich社製 ・トリクレジルホスフェートlAidrich社製
Aluminum hydroxide: "B703S" manufactured by Nippon Light Metal Co., Ltd.-Magnesium hydroxide: "Kisuma 5A" manufactured by Kyowa Chemical Co., Ltd.-Ammonium polyphosphate: "AP42 manufactured by Hoechst"
2 "-Phenylphosphonic acid: Wako Pure Chemical Industries-n-Butylphosphonic acid: Aldrich-t-Butylphosphonic acid: Aldrich-Triphenylphosphate lAidrich-Tricresylphosphate lAidrich

【0038】・TiO2 :石原産業社製ルチル型「CR
80」 ・MgO:和光純薬社製 ・滑剤(1):ヘキスト社製ポリエチレンワックス ・滑剤(2):ヘキスト社製モンタン酸部分ケン化エス
テルワックス ・発泡剤:大塚化学社製アゾジカルボンアミド ・発泡助剤:バイエル社製アクティブジンクオキサイド
TiO 2 : rutile type "CR made by Ishihara Sangyo Co., Ltd.
80 "-MgO: Wako Pure Chemical Industries-Lubricant (1): Hoechst polyethylene wax-Lubricant (2): Hoechst montanic acid partially saponified ester wax-Foaming agent: Otsuka Chemical's azodicarbonamide-Foaming Auxiliary agent: Bayer active zinc oxide

【0039】[0039]

【発明の効果】本発明の難燃性ポリオレフィン系樹脂発
泡体は、上述した通りであり、ハロゲン系の難燃剤を使
用することなく高度の難燃性が付与されており、燃焼時
に煙の発生がなく、しかも優れた外観を有する。従っ
て、高い難燃性が要求される建築材料分野等で断熱材と
して好適に使用することができる。
EFFECT OF THE INVENTION The flame-retardant polyolefin resin foam of the present invention is as described above, and is imparted with a high degree of flame retardance without using a halogen-based flame retardant, and produces smoke during combustion. And has an excellent appearance. Therefore, it can be suitably used as a heat insulating material in the field of building materials where high flame retardancy is required.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】エチレン−酢酸ビニル共重合体を主成分と
する樹脂成分100重量部、水和金属化合物50〜20
0重量部、熱分解温度の異なるリン含有化合物を少なく
とも2種含むリン系難燃剤5〜100重量部ならびに発
泡剤からなる樹脂組成物が架橋させられた後、該発泡剤
の分解温度以上に加熱されて発泡させられていることを
特徴とする難燃性ポリオレフィン系樹脂発泡体。
1. A resin component comprising an ethylene-vinyl acetate copolymer as a main component, 100 parts by weight, and a hydrated metal compound 50 to 20.
0 parts by weight, 5 to 100 parts by weight of a phosphorus-based flame retardant containing at least two phosphorus-containing compounds having different thermal decomposition temperatures, and a resin composition comprising a foaming agent are crosslinked, and then heated to a temperature above the decomposition temperature of the foaming agent. A flame-retardant polyolefin-based resin foam characterized by being foamed.
JP31133695A 1995-11-29 1995-11-29 Flame-retardant polyolefin resin foam Pending JPH09151268A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31133695A JPH09151268A (en) 1995-11-29 1995-11-29 Flame-retardant polyolefin resin foam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31133695A JPH09151268A (en) 1995-11-29 1995-11-29 Flame-retardant polyolefin resin foam

Publications (1)

Publication Number Publication Date
JPH09151268A true JPH09151268A (en) 1997-06-10

Family

ID=18015925

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31133695A Pending JPH09151268A (en) 1995-11-29 1995-11-29 Flame-retardant polyolefin resin foam

Country Status (1)

Country Link
JP (1) JPH09151268A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001059038A (en) * 1999-08-23 2001-03-06 Sanwa Kako Co Ltd Production of flame-retardant crosslinked polyethylene- based foam
WO2014080821A1 (en) * 2012-11-21 2014-05-30 堺化学工業株式会社 Flame retardant and flame-retardant resin composition
KR101496218B1 (en) * 2013-07-18 2015-02-26 영보화학 주식회사 Non-halogen flame retardant foam and manufacturing method thereof
US9260577B2 (en) 2009-07-14 2016-02-16 Toray Plastics (America), Inc. Crosslinked polyolefin foam sheet with exceptional softness, haptics, moldability, thermal stability and shear strength

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001059038A (en) * 1999-08-23 2001-03-06 Sanwa Kako Co Ltd Production of flame-retardant crosslinked polyethylene- based foam
US9260577B2 (en) 2009-07-14 2016-02-16 Toray Plastics (America), Inc. Crosslinked polyolefin foam sheet with exceptional softness, haptics, moldability, thermal stability and shear strength
US10301447B2 (en) 2009-07-14 2019-05-28 Toray Plastics (America), Inc. Crosslinked polyolefin foam sheet with exceptional softness, haptics, moldability, thermal stability and shear strength
WO2014080821A1 (en) * 2012-11-21 2014-05-30 堺化学工業株式会社 Flame retardant and flame-retardant resin composition
KR101496218B1 (en) * 2013-07-18 2015-02-26 영보화학 주식회사 Non-halogen flame retardant foam and manufacturing method thereof

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