JP6985363B2 - Polymer compound containing poly (meth) acrylicimide foam particles - Google Patents

Polymer compound containing poly (meth) acrylicimide foam particles Download PDF

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JP6985363B2
JP6985363B2 JP2019502132A JP2019502132A JP6985363B2 JP 6985363 B2 JP6985363 B2 JP 6985363B2 JP 2019502132 A JP2019502132 A JP 2019502132A JP 2019502132 A JP2019502132 A JP 2019502132A JP 6985363 B2 JP6985363 B2 JP 6985363B2
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ルイス ヴィレマン リカルド
コン チアンウェン
ヤン ジアンミン
ワン ジシェン
ルー チュンフェン
リー ジンビン
ホライン デニス
ベッカー フローリアン
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Evonik Specialty Chemicals Shanghai Co Ltd
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    • C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
    • C08J2377/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
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    • C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
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Description

本発明は、ポリ（メタ）アクリルイミド（Ｐ（Ｍ）Ｉ）フォーム粒子、特にポリメタクリルイミド（ＰＭＩ）フォーム粒子を含む、ポリマーコンパウンドに関する。 The present invention relates to polymer compounds comprising poly (meth) acrylicimide (P (M) I) foam particles, particularly polymethacrylicimide (PMI) foam particles.

背景技術
ポリ（メタ）アクリルイミドフォーム、例えばポリメタクリルイミドフォーム、例えばＥｖｏｎｉｋ Ｒｅｓｏｕｒｃｅ Ｅｆｆｉｃｉｅｎｃｙ ＧＭＢＨによって商品名Ｒｏｈａｃｅｌｌ（登録商標）として市販されているものは、その軽量且つ高い機械的性能ゆえに、航空宇宙、自動車、スポーツおよび医療機器の産業等において、軽量の設計のために複合材中で広く使用されている。 Background Technology Poly (meth) acrylicimide foams, such as polymethacrylicimide foams, such as those marketed by Evonik Resources Efficiency GMBH under the trade name Rohacelll®, are aerospace, automotive due to their lightweight and high mechanical performance. Widely used in composites for lightweight design, etc. in the sports and medical equipment industries.

過去において、Ｐ（Ｍ）Ｉフォームはブロックの形状で供給されていたが、それは複雑な３Ｄの幾何学的形状を有する部品の加工にはあまり適合せず、長いサイクル時間、低い精度、および材料の廃棄をもたらすことがあった。 In the past, P (M) I foam was supplied in the form of blocks, but it is not well suited for machining parts with complex 3D geometry, long cycle times, low accuracy, and materials. May result in disposal.

国際公開第２０１３／０５６９４７号(WO2013/056947)は、部分的に上記の課題を解決するＰ（Ｍ）Ｉフォームのモールド成型方法を記載しており、そこでは、（予備発泡された）Ｐ（Ｍ）Ｉポリマー粒子がモールド内で、ポリアミドまたはポリ（メタ）アクリレートであり得る接着剤で補助されて発泡される。接着剤の用量はＰ（Ｍ）Ｉポリマー粒子の２０％まで、例えば、Ｐ（Ｍ）Ｉポリマー粒子と接着剤との総質量に対して１６．７％までであってよい。しかしながら、この方法は、未だに長いサイクル時間をもたらす。 International Publication No. 2013/056947 (WO2013 / 056947) describes a method of molding P (M) I foam that partially solves the above problems, in which (pre-foamed) P (pre-foamed) P ( M) I Polymer particles are foamed in the mold, assisted by an adhesive that can be polyamide or poly (meth) acrylate. The dose of the adhesive may be up to 20% of the P (M) I polymer particles, for example up to 16.7% of the total mass of the P (M) I polymer particles and the adhesive. However, this method still results in long cycle times.

上述の課題を解決するために、本発明者らは、Ｐ（Ｍ）Ｉフォーム粒子が、熱可塑性樹脂と共にポリマーコンパウンドを形成する可能性を探索し、本発明を成し遂げた。 In order to solve the above-mentioned problems, the present inventors have explored the possibility that P (M) I foam particles form a polymer compound together with a thermoplastic resin, and accomplished the present invention.

発明の概要
本発明は、
（１） ４００℃未満の温度で溶融加工可能な熱可塑性樹脂と、
（２） ４００℃未満の温度で粒子状の形態を保持するポリ（メタ）アクリルイミドフォーム粒子
とを含むポリマーコンパウンドであって、前記ポリマーコンパウンドの総質量に対して、
前記熱可塑性樹脂が２０〜９９％を構成し、且つ
前記Ｐ（Ｍ）Ｉフォーム粒子が１〜８０％を構成する、
前記ポリマーコンパウンドを提供する。 Outline of the invention The present invention
(1) A thermoplastic resin that can be melt-processed at a temperature of less than 400 ° C.
(2) A polymer compound containing poly (meth) acrylicimide foam particles that retain a particulate morphology at a temperature of less than 400 ° C., with respect to the total mass of the polymer compound.
The thermoplastic resin comprises 20-99% and the P (M) I foam particles make up 1-80%.
The polymer compound is provided.

意外なことに、本発明のポリマーコンパウンドは、軽量であること以外に、個々の成分よりも良好な圧縮強さおよび／または曲げ強さを達成することが判明した。 Surprisingly, the polymeric compounds of the invention have been found to achieve better compressive and / or flexural strength than the individual components, in addition to being lightweight.

本発明はさらに、本発明のポリマーコンパウンドの製造方法であって、ポリ（メタ）アクリルイミドフォーム粒子と熱可塑性樹脂の溶融物とを物理的に混合する段階を含む前記方法を提供する。 The present invention further provides a method for producing a polymer compound of the present invention, which comprises the steps of physically mixing poly (meth) acrylicimide foam particles with a melt of a thermoplastic resin.

本発明はさらに、軽量の構造物における本発明のポリマーコンパウンドの使用を提供する。 The invention further provides the use of the polymeric compounds of the invention in lightweight structures.

発明の詳細な説明
前記熱可塑性樹脂は、４００℃未満の温度で溶融加工可能である限り、限定されない。溶融加工可能とは、そのポリマーを、示された温度で実質的にポリマーの劣化なく加工できるという、通常の意味で用いられる。 Detailed Description of the Invention The thermoplastic resin is not limited as long as it can be melt-processed at a temperature of less than 400 ° C. Melt processable is used in the usual sense that the polymer can be processed at the indicated temperature with substantially no deterioration of the polymer.

前記熱可塑性樹脂の例は、ポリアミド、ポリオレフィン、ポリエステルおよび任意の上記のセグメントを含有するコポリマー、並びにそれらのブレンドを含む。 Examples of the thermoplastic resin include polyamides, polyolefins, polyesters and copolymers containing any of the above segments, as well as blends thereof.

好ましくは、前記ポリアミドは、脂肪族ポリアミド、より好ましくはＰＡ６、ＰＡ１１、ＰＡ１２、ＰＡ４６、ＰＡ６６、ＰＡ１０、ＰＡ６１０、ＰＡ６１２、ＰＡ１０１０、ＰＡ１０１２およびそれらのブレンドから選択される。 Preferably, the polyamide is selected from aliphatic polyamides, more preferably PA6, PA11, PA12, PA46, PA66, PA10, PA610, PA612, PA1010, PA1012 and blends thereof.

本発明において使用されるＰ（Ｍ）Ｉフォーム粒子は、粒子状の形態ではないＰ（Ｍ）Ｉフォームを造粒することによって得ることができる。 The P (M) I foam particles used in the present invention can be obtained by granulating P (M) I foam which is not in the form of particles.

Ｐ（Ｍ）Ｉフォームは硬質フォームとも称され、特別な頑健性を特徴とする。前記Ｐ（Ｍ）Ｉフォームは通常、ａ） キャストポリマーの製造、およびｂ） 前記キャストポリマーの発泡という２段階の工程で製造される。先行技術によれば、それらは次に切断または鋸で切られて、所望の形状がもたらされる。 P (M) I foam, also referred to as rigid foam, is characterized by special robustness. The P (M) I foam is usually produced in a two-step process of a) the production of the cast polymer and b) the foaming of the cast polymer. According to the prior art, they are then cut or sawed to give the desired shape.

Ｐ（Ｍ）Ｉフォームの製造は、（メタ）アクリル酸と（メタ）アクリロニトリルとを、好ましくは２：３〜３：２のモル比で、主成分として含むモノマー混合物の製造で開始する。他のコモノマーを使用することもでき、例はアクリル酸またはメタクリル酸、スチレン、マレイン酸およびイタコン酸のエステル、およびそれらの無水物、およびビニルピロリドンである。しかしながら、ここでコモノマーの割合は３０質量％を上回るべきではない。少量の架橋モノマーを使用することもでき、一例はアリルアクリレートである。しかしながら、その量は好ましくは最大で０．０５質量％〜２．０質量％であるべきである。 The production of P (M) I foam is initiated by the production of a monomer mixture containing (meth) acrylic acid and (meth) acrylonitrile, preferably in a molar ratio of 2: 3 to 3: 2, as the main components. Other comonomeres can also be used, examples are acrylic acid or methacrylic acid, styrene, maleic acid and itaconic acid esters, and their anhydrides, and vinylpyrrolidone. However, the proportion of comonomer here should not exceed 30% by weight. A small amount of crosslinked monomer can also be used, one example being allyl acrylate. However, the amount should preferably be at most 0.05% to 2.0% by weight.

共重合混合物はさらに、約１５０〜２５０℃の温度で分解または蒸発して気相を形成する膨張剤を含む。重合はこの温度未満で生じるので、前記キャストポリマーは潜在的な膨張剤を含む。重合は有利には２つのガラスプレートの間のブロックモールド内で生じる。 The copolymerized mixture further comprises a leavening agent that decomposes or evaporates at a temperature of about 150-250 ° C. to form a vapor phase. Since the polymerization occurs below this temperature, the cast polymer contains a potential leavening agent. Polymerization advantageously occurs in the block mold between the two glass plates.

前記キャストポリマーを次に、第二の段階において適切な温度で発泡させる。そのようなＰ（Ｍ）Ｉフォームの製造は、原理的に当業者に公知であり、例えば欧州特許出願公開第１４４４２９３号明細書(EP1444293)、欧州特許出願公開第１６７８２４４号明細書(EP1678244)または国際公開第２０１１／１３８０６０(WO2011/138060)号内で調べることができる。 The cast polymer is then foamed at an appropriate temperature in the second step. The manufacture of such P (M) I foams is, in principle, known to those of skill in the art, eg, European Patent Application Publication No. 1444293 (EP1444293), European Patent Application Publication No. 1678244 (EP1678244) or It can be found in International Publication No. 2011/138060 (WO2011 / 138060).

本発明において使用されるＰ（Ｍ）Ｉフォーム粒子は、Ｐ（Ｍ）Ｉポリマー粒子の発泡によって得ることもできる。 The P (M) I foam particles used in the present invention can also be obtained by foaming P (M) I polymer particles.

前記Ｐ（Ｍ）Ｉポリマー粒子を、例えばカッティングミル中でキャストポリマーを粉砕することによって得ることができる。その粉砕物を次に適切な温度で発泡させて、Ｐ（Ｍ）Ｉフォーム粒子を製造する。 The P (M) I polymer particles can be obtained, for example, by grinding the cast polymer in a cutting mill. The pulverized material is then foamed at an appropriate temperature to produce P (M) I foam particles.

好ましくは、本発明内で使用されるＰ（Ｍ）Ｉフォーム粒子はＰ（Ｍ）Ｉポリマー粒子の発泡によって得られ、その際、Ｐ（Ｍ）Ｉフォームの造粒によって得られたＰ（Ｍ）Ｉフォーム粒子と比較して、フォームの独立気泡は破壊されていない。 Preferably, the P (M) I foam particles used in the present invention are obtained by foaming P (M) I polymer particles, in which case P (M) obtained by granulation of P (M) I foam. ) Compared to the I-foam particles, the closed cells of the foam are not destroyed.

好ましくは、前記Ｐ（Ｍ）Ｉフォーム粒子は０．１〜３０ｍｍ、より好ましくは０．５〜１０ｍｍの範囲の粒径を有する。 Preferably, the P (M) I foam particles have a particle size in the range of 0.1 to 30 mm, more preferably 0.5 to 10 mm.

好ましくは、前記Ｐ（Ｍ）Ｉフォーム粒子は２５〜２２０ｋｇ／ｍ3、より好ましくは５０〜１５０ｋｇ／ｍ3のかさ密度を有する。 Preferably, the P (M) I foam particles have a bulk density of 25-220 kg / m 3 , more preferably 50-150 kg / m 3.

本発明の１つの好ましい実施態様において、前記Ｐ（Ｍ）Ｉフォーム粒子はポリメタクリルイミド（ＰＭＩ）フォーム粒子である。 In one preferred embodiment of the invention, the P (M) I foam particles are polymethacrylicimide (PMI) foam particles.

Ｅｖｏｎｉｋ Ｒｅｓｏｕｒｃｅ Ｅｆｆｉｃｉｅｎｃｙ ＧＭＢＨから市販されているＲｏｈａｃｅｌｌ（登録商標）ＰＭＩポリマーおよび／またはフォームを特に言及できる。 Specific reference can be made to Rohacelll® PMI polymers and / or foams commercially available from Evonik Resources Efficiency GMBH.

本発明のポリマーコンパウンド中での熱可塑性樹脂とＰ（Ｍ）Ｉフォーム粒子との比は限定されない。 The ratio of the thermoplastic resin to the P (M) I foam particles in the polymer compound of the present invention is not limited.

ポリマーコンパウンドの総質量に対して、前記熱可塑性樹脂は２０〜９５％、好ましくは２０〜８０％、より好ましくは３０〜７０％を構成でき、且つ前記Ｐ（Ｍ）Ｉフォーム粒子は５〜８０％、好ましくは２０〜８０％、より好ましくは３０〜７０％を構成できる。しかし、ポリマーコンパウンドの総質量に対して、前記熱可塑性樹脂が１〜９９％を構成し、且つ前記Ｐ（Ｍ）Ｉフォーム粒子が１〜９９％を構成することもできる。 The thermoplastic resin can make up 20-95%, preferably 20-80%, more preferably 30-70%, and the P (M) I foam particles 5-80% of the total mass of the polymer compound. %, Preferably 20-80%, more preferably 30-70%. However, the thermoplastic resin may make up 1-99% and the P (M) I foam particles may make up 1-99% of the total mass of the polymer compound.

本発明の１つの好ましい実施態様において、前記熱可塑性樹脂は２５０℃未満の温度で溶融加工可能であり、且つ／または前記Ｐ（Ｍ）Ｉフォーム粒子は２５０℃未満の温度で粒子状の形態を保持する。 In one preferred embodiment of the invention, the thermoplastic resin can be melted at a temperature below 250 ° C. and / or the P (M) I foam particles have a particulate form at a temperature below 250 ° C. Hold.

本発明のポリマーコンパウンドは、所望の効果または性能に依存して、添加剤、例えば炭酸カルシウム、カラスビーズ、酸化亜鉛、および繊維強化材、例えばセラミック繊維、アラミド繊維、チタン酸カリウム繊維、ガラス繊維およびカーボン繊維を含むことができる。 The polymer compounds of the present invention depend on the desired effect or performance with additives such as calcium carbonate, crow beads, zinc oxide, and fiber reinforcements such as ceramic fibers, aramid fibers, potassium titanate fibers, glass fibers and It can contain carbon fibers.

本発明のポリマーコンパウンドは一般に、原理的に任意の種類の軽量の構造物のために適しており、且つ、特に、例えば自動車産業における車体の製造または内装のクラッディング、鉄道車両の製造または造船における内装部品のための量産において、航空宇宙産業において、医療技術において、スポーツ用品の生産において、家具の製造において、または風力タービンの設計において使用できる。 The polymer compounds of the present invention are generally suitable for any kind of lightweight structure in principle, and are particularly suitable for vehicle body manufacturing or interior cladding, railroad vehicle manufacturing or shipbuilding, for example in the automotive industry. It can be used in mass production for interior parts, in the aerospace industry, in medical technology, in the production of sporting goods, in the manufacture of furniture, or in the design of wind turbines.

実施例内で使用されたＰＭＩフォーム粒子は、商品名ＲＯＨＡＣＥＬＬ（登録商標）Ｔｒｉｐｌｅ ＦとしてＥｖｏｎｉｋ Ｒｅｓｏｕｒｃｅ Ｅｆｆｉｃｉｅｎｃｙ ＧＭＢＨから市販されているＰＭＩポリマー粒子から製造された。前記ＰＭＩポリマー粒子は、完全に重合されたコポリマーシート（予備発泡されていない）から、造粒機で補助して製造された。実施例内で使用された粒子の粒径の範囲は、篩別して微細分を保持した後に、１．０ｍｍ未満であった。ＰＭＩポリマー粒子のかさ密度は約６００〜７００ｋｇ／ｍ3であった。 The PMI foam particles used in the Examples were made from PMI polymer particles commercially available from Evonik Resource Efficiency GMBH under the trade name ROHACELL® Triple F. The PMI polymer particles were produced from a fully polymerized copolymer sheet (not pre-foamed) with the assistance of a granulator. The particle size range of the particles used in the examples was less than 1.0 mm after sieving to retain the fines. The bulk density of the PMI polymer particles was about 600-700 kg / m 3 .

前記ＰＭＩポリマー粒子を、温度２００〜２４０℃で３０〜６０分間、オーブン内で発泡させた。得られたＰＭＩフォーム粒子は、かさ密度１００〜１５０ｋｇ／ｍ3および粒径０．５〜５ｍｍを有していた。 The PMI polymer particles were foamed in an oven at a temperature of 200-240 ° C. for 30-60 minutes. The obtained PMI foam particles had a bulk density of 100 to 150 kg / m 3 and a particle size of 0.5 to 5 mm.

前記ＰＭＩフォーム粒子を、ＰＡ１２（Ｅｖｏｎｉｋ Ｒｅｓｏｕｒｃｅ Ｅｆｆｉｃｉｅｎｃｙ ＧＭＢＨのＶｅｓｔａｍｉｄ（登録商標）Ｌ１６００）およびＰＡ１２エラストマー（Ｅｖｏｎｉｋ Ｒｅｓｏｕｒｃｅ Ｅｆｆｉｃｉｅｎｃｙ ＧＭＢＨのＶｅｓｔａｍｉｄ（登録商標）Ｅ３０、ポリエーテルブロックＰＡ１２）の溶融物とそれぞれ混合して、２つの５０：５０（質量）のコンパウンドを製造し、それらを厚さ５ｍｍのプレートに成型した。 The PMI foam particles are mixed with PA12 (Evonik Resource Efficiency GMBH Vestamide® L1600) and PA12 elastomer (Evonik Resource Efficiency GMBH Vestamide® E30, respectively, and a melted product of a polyether block PA12). Two 50:50 (mass) compounds were made and molded into 5 mm thick plates.

前記プレートを、圧縮強さ（ＩＳＯ８４４）および曲げ強さ（ＩＳＯ１７８）並びに密度について試験した。結果を以下の表に示す。

Figure 0006985363
The plates were tested for compressive strength (ISO844) and bending strength (ISO178) as well as density. The results are shown in the table below.
Figure 0006985363

*Ｒｏｈａｃｅｌｌ（登録商標） ２００ ＷＦ ＰＭＩ硬質フォーム（Ｅｖｏｎｉｋ Ｒｅｓｏｕｒｃｅ Ｅｆｆｉｃｉｅｎｃｙ ＧＭＢＨから市販）は、市販のＲｏｈａｃｅｌｌシリーズのＰＭＩフォームの中では圧縮強さおよび曲げ強さが比較的高いので、参照用材料として選択された。 * Rohacelll® 200 WF PMI Rigid Foam (commercially available from Evonik Resource Efficiency GMBH) has been selected as a reference material due to its relatively high compressive and flexural strength among the commercially available Rohacellel series PMI foams. rice field.

Ｖｅｓｔａｍｉｄ Ｌ１６００およびＶｅｓｔａｍｉｄ Ｅ３０の両方について、２５％を上回る質量の低減が達成されることが理解できる。また、実施例のポリマーコンパウンドは、個々の原料よりも高い圧縮強さおよび／または曲げ強さを達成する。 It can be seen that a mass reduction of more than 25% is achieved for both Vestamide L1600 and Vestamide E30. Also, the polymer compounds of the examples achieve higher compressive strength and / or bending strength than the individual raw materials.

Claims (9)

（１） ４００℃未満の温度で溶融加工可能な熱可塑性樹脂と、
（２） ４００℃未満の温度で粒子状の形態を保持するポリ（メタ）アクリルイミド（Ｐ（Ｍ）Ｉ）フォーム粒子
とを含むポリマーコンパウンドであって、
前記ポリマーコンパウンドの総質量に対して、
前記熱可塑性樹脂が３０〜７０％を構成し、
前記Ｐ（Ｍ）Ｉフォーム粒子が３０〜７０％を構成し、且つ
前記Ｐ（Ｍ）Ｉフォーム粒子が、０．５〜５ｍｍの範囲の粒径及び１００〜１５０ｋｇ／ｍ 3 のかさ密度を有する、
前記ポリマーコンパウンド。 (1) A thermoplastic resin that can be melt-processed at a temperature of less than 400 ° C.
(2) A polymer compound containing poly (meth) acrylicimide (P (M) I) foam particles that retain their particulate morphology at temperatures below 400 ° C.
With respect to the total mass of the polymer compound
The thermoplastic resin constitutes 30 to 70 %,
The P (M) I foam particles constitute 30 to 70% and
The P (M) I foam particles have a particle size in the range of 0.5-5 mm and a bulk density of 100-150 kg / m 3.
The polymer compound. 前記熱可塑性樹脂が、ポリアミド、ポリオレフィン、ポリエステルおよび任意の上記のセグメントを含有するコポリマー、並びにそれらのブレンドから選択される、請求項１に記載のポリマーコンパウンド。 The polymer compound according to claim 1, wherein the thermoplastic resin is selected from a copolymer containing a polyamide, a polyolefin, a polyester and any of the above segments, and a blend thereof. 前記ポリアミドが、脂肪族ポリアミドから選択される、請求項２に記載のポリマーコンパウンド。 The polymer compound according to claim 2, wherein the polyamide is selected from aliphatic polyamides. 前記脂肪族ポリアミドが、ＰＡ６、ＰＡ１１、ＰＡ１２、ＰＡ４６、ＰＡ６６、ＰＡ１０、ＰＡ６１０、ＰＡ６１２、ＰＡ１０１０、ＰＡ１０１２およびそれらのブレンドからなる群から選択される、請求項３に記載のポリマーコンパウンド。The polymer compound according to claim 3, wherein the aliphatic polyamide is selected from the group consisting of PA6, PA11, PA12, PA46, PA66, PA10, PA610, PA612, PA1010, PA1012 and blends thereof. 前記Ｐ（Ｍ）Ｉフォーム粒子が、
（１） 粒子状の形態ではないＰ（Ｍ）Ｉフォームを造粒すること、または
（２） Ｐ（Ｍ）Ｉポリマー粒子を発泡させること
によって得られるものである、請求項１から４までのいずれか１項に記載のポリマーコンパウンド。 The P (M) I foam particles are
Claims 1 to 4 , which are obtained by (1) granulating P (M) I foam that is not in the form of particles, or (2) foaming P (M) I polymer particles. The polymer compound according to any one of the following items. 前記Ｐ（Ｍ）Ｉフォーム粒子が、ポリメタクリルイミド（ＰＭＩ）フォーム粒子である、請求項１から５までのいずれか１項に記載のポリマーコンパウンド。 The polymer compound according to any one of claims 1 to 5 , wherein the P (M) I foam particles are polymethacrylicimide (PMI) foam particles. 前記熱可塑性樹脂は約２５０℃未満の温度で溶融加工可能であり、且つ／または
前記Ｐ（Ｍ）Ｉフォーム粒子は２５０℃未満の温度で粒子状の形態を保持する、
請求項１から６までのいずれか１項に記載のポリマーコンパウンド。 The thermoplastic resin can be melted at a temperature of less than about 250 ° C. and / or the P (M) I foam particles retain their particulate form at a temperature of less than 250 ° C.
The polymer compound according to any one of claims 1 to 6. 前記Ｐ（Ｍ）Ｉフォーム粒子と前記熱可塑性樹脂の溶融物とを、物理的に混合する段階を含む、請求項１から７までのいずれか１項に記載のポリマーコンパウンドの製造方法。 The method for producing a polymer compound according to any one of claims 1 to 7 , which comprises a step of physically mixing the P (M) I foam particles and the melt of the thermoplastic resin. 請求項１から７までのいずれか１項に記載のポリマーコンパウンドの軽量の構造物中での使用。 Use of the polymer compound according to any one of claims 1 to 7 in a lightweight structure.
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