WO2021135599A1 - Composition de polyéthylène et procédé de préparation associé - Google Patents

Composition de polyéthylène et procédé de préparation associé Download PDF

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Publication number
WO2021135599A1
WO2021135599A1 PCT/CN2020/125122 CN2020125122W WO2021135599A1 WO 2021135599 A1 WO2021135599 A1 WO 2021135599A1 CN 2020125122 W CN2020125122 W CN 2020125122W WO 2021135599 A1 WO2021135599 A1 WO 2021135599A1
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WIPO (PCT)
Prior art keywords
polyethylene composition
parts
polyethylene
sound insulation
foaming agent
Prior art date
Application number
PCT/CN2020/125122
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English (en)
Chinese (zh)
Inventor
李振华
黄险波
叶南飚
王琪
杨波
俞飞
李伟
吴国峰
罗忠富
Original Assignee
金发科技股份有限公司
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Publication of WO2021135599A1 publication Critical patent/WO2021135599A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
    • B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0014—Use of organic additives
    • C08J9/0023—Use of organic additives containing oxygen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0014—Use of organic additives
    • C08J9/0038—Use of organic additives containing phosphorus
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0066—Use of inorganic compounding ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/02—Organic and inorganic ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/13—Phenols; Phenolates
    • C08K5/134—Phenols containing ester groups
    • C08K5/1345—Carboxylic esters of phenolcarboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/49—Phosphorus-containing compounds
    • C08K5/51—Phosphorus bound to oxygen
    • C08K5/52—Phosphorus bound to oxygen only
    • C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
    • C08K5/526—Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds

Definitions

  • the invention relates to the technical field of polymer materials, in particular to a polyethylene composition and a preparation method thereof.
  • polyethylene As a cost-effective general-purpose plastic, polyethylene has high strength, high toughness, excellent mechanical properties, chemical resistance, low water absorption, and excellent electrical insulation after modification. It is widely used in automotive interior and exterior products.
  • Patent CN 109263214 A discloses a soundproof composite material for the front wall of an automobile, which includes a sound-absorbing cotton layer in the middle layer and a first layer of polymer sheet and a second layer of polymer sheet on both sides of the sound-absorbing cotton layer.
  • a raised obstacle is set between one layer of polymer sheet and the second layer of polymer sheet on the side close to the sound-absorbing cotton, so that the sound wave is refracted and the direction of the sound wave is greatly changed so that the sound-absorbing cotton can effectively absorb sound waves.
  • the above methods are mainly from the structural design. Instead of starting from the structure of the material itself, there is significant room for improvement in the sound insulation improvement effect.
  • CN 109627550 A discloses a foaming material added with AC foaming agent to obtain a dense and high closed cell foaming material.
  • the added AC foaming agent itself will be released during the foaming process. Ammonia and the residues after foaming also have carcinogenic risks. Therefore, the use of such foaming agents is difficult to be used in a wide range of home appliances and automotive products.
  • the foamed PE material shown in this patent is added with a certain amount The EPDM and glass fiber make the material molding performance decrease, which limits its use in some complex structural parts.
  • PE automotive interior and exterior sound insulation materials on the market are composed of polymer materials and sound insulation cotton to form a multilayer composite sound insulation material.
  • the material preparation process is relatively complicated, and the material cost is high.
  • each component Based on the lightweight requirements of the automotive industry, each component has Clear lightweight indicators.
  • the purpose of the present invention is to overcome the shortcomings of the prior art and provide a polyethylene composition and a preparation method thereof.
  • the technical solution adopted by the present invention is: a polyethylene composition comprising the following components in parts by weight: 100 parts of polyethylene resin, 0 to 34 parts of filler and 0.05 to 2.5 parts of foaming agent;
  • the polyethylene resin is a low-density polyethylene resin, and the melt mass flow rate of the polyethylene resin is 10-30 g/10 min at 230° C. and a load of 2.16 kg.
  • the polyethylene composition is obtained as a micro-foam material, which can form a "sandwich" skin-core structure with a dense skin layer on the outside, with fine cells, which can achieve about 10%
  • the filler is calcium carbonate and/or talc.
  • the particle size D50 of the filler is less than or equal to 5 ⁇ m.
  • the filler is 10-30 parts.
  • the addition of fillers plays the role of foaming and nucleation when the material is foamed, increasing the number of foaming nuclei and increasing the number of cells, which can increase the cell density of the material, while reducing the cell size and improving foaming
  • the sound insulation performance of the material but excessive addition of talc powder will further increase the viscosity of the material, which will make the expandability of the material worse, resulting in a decrease in cell density.
  • the filler is 24 parts.
  • the amount of talcum powder added is 24 parts, the sound insulation effect is the best.
  • the foaming agent is at least one of bicarbonate and citrate.
  • the polyethylene composition further contains 0-2 parts of auxiliary agents and 0-2 parts of pigments.
  • the auxiliary agent is at least one of an antioxidant, a light stabilizer, and a lubricant.
  • the antioxidants are hindered phenol and phosphite antioxidants.
  • the light stabilizer is a hindered amine light stabilizer.
  • the lubricant is at least one of silicones, esters, amides, polyethylenes, stearic acids, fatty acids and esters.
  • the present invention also provides a method for preparing the above-mentioned polyethylene composition, which includes the following steps: mix the components except the foaming agent uniformly and then add them to the twin-screw extruder, perform melt mixing, and melt mixing temperature The temperature is 170-220°C, the screw speed is 350-450 rpm, extrusion granulation, then adding foaming agent, injection molding into the mold, to obtain the polyethylene composition.
  • the invention adopts a secondary mold opening process for injection molding.
  • the part close to the mold during injection molding forms a dense skin layer due to pre-cooling, and the material that has not been completely cooled inside is further foamed when the mold is slightly opened for the first time. Therefore, a "sandwich" skin-core structure with a dense skin layer on the outside can be formed, which has weight reduction and sound insulation properties.
  • the present invention provides a polyethylene composition.
  • the polyethylene composition of the present invention optimizes polyethylene materials with different fluidity to obtain the polyethylene composition as a kind of micro-foaming material, which can form a "sandwich" skin-core structure with a dense skin layer on the outside, and has cells It is compact, can achieve a weight reduction of about 25%, has good sound insulation, and has good formability. It has a good prospect in applications such as automobile air ducts, wheel cover sound insulation materials, and front wall sound insulation materials.
  • the polyethylene resins were all low-density polyethylene resins, and the melt mass flow rate at 230° C. under a load of 2.16 kg is shown in Table 1.
  • the foaming agent is a bicarbonate foaming agent, purchased from EE25C of Yonghe Chemical Industry Co., Ltd.;
  • the pigment is black masterbatch, purchased from Cabot Company, the model is UN2005;
  • the antioxidants were purchased from Shandong Sanfeng Group Co., Ltd., and the models were 1010 (hindered phenolic antioxidants) and 168 (phosphite antioxidants); the weight ratio of 1010 to 168 was 1:1;
  • the light stabilizer is a hindered amine light stabilizer, purchased from Beijing Tiangang Auxiliary Co., Ltd., model 3808.
  • the polyethylene resin, talc, pigment, antioxidant, and light stabilizer in the formulations of Comparative Example 4 and Comparative Example 6 were mixed uniformly and then added to the twin-screw extruder for melting and mixing.
  • the melting and mixing temperature was 170-220. °C, the screw speed is 350-450 rpm, extrusion granulation, process injection molding into 100mm*100mm*1.5mm sample pieces, to obtain the polyethylene composition sample pieces of Comparative Example 4 and Comparative Example 6.
  • the polyethylene resin, talcum powder, pigment, antioxidant, and light stabilizer in the formulations of Comparative Examples 1-13, Comparative Examples 1-3 and Comparative Example 5 were mixed uniformly and then added to a twin-screw extruder for melt mixing. Melt mixing temperature is 170 ⁇ 220°C, screw speed is 350 ⁇ 450 rpm, extrude and granulate, then add foaming agent, and use secondary moulding process to inject into 100mm*100mm*2.5mm sample, get comparative example 1-13.
  • test methods are as follows:
  • Cell density Take a cross-sectional scanning electron microscope photo of the sample, and calculate the cell density in a certain volume according to the cell size and cell distribution in the cross-sectional photo.
  • the sound insulation test impedance tube is used to test the sound insulation effect of the material. Sound waves of different frequencies are emitted at one end of the impedance tube. A disc with a sample size of 100mm diameter is inserted in the middle of the impedance tube, and the sample is close to the sound source. Sound sensors are installed on both sides of the sound source and away from the sound source to test the intensity of the sound in dB. The difference between the two is the sound insulation value of the sample.
  • the sound intensity at 500Hz is greater than 23.5dB
  • the sound intensity at 1000Hz is greater than 23.8dB
  • the sound intensity at 1500Hz is greater than 36.2dB
  • the sound intensity is greater than 19.5dB, which can achieve better sound insulation and noise reduction effects than foam, and greatly reduce production costs.
  • fillers can increase the sound insulation effect. With the increase of filler content, the sound insulation effect increases. However, when the amount of talc powder is more than 30 parts, the sound insulation effect is reduced. When the amount of talc powder is more than 34 parts, the sound insulation effect is not improved. Obvious, and the appearance deteriorates.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Emergency Medicine (AREA)
  • General Chemical & Material Sciences (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

L'invention concerne une composition de polyéthylène, comprenant les constituants suivants, en parties en poids : 100 parties d'une résine de polyéthylène, 0-34 parties d'une charge et 0,05-2,5 parties d'un agent moussant ; la résine de polyéthylène est une résine de polyéthylène basse densité et, à 230°C et sous une charge de 2,16 kg, l'indice de fluidité à chaud de la résine de polyéthylène est de 10-30 g/10 min. Dans la présente invention, au moyen de l'optimisation de matériaux de polyéthylène présentant différentes fluidités, la composition de polyéthylène décrite est obtenue sous la forme d'un matériau micro-moussant. Une structure de peau-noyau en "sandwich", pourvue d'une couche de peau dense à l'extérieur peut être formée et la structure présente des pores fins et denses. La présente invention permet d'obtenir une perte de poids d'environ 25 %, présente une bonne isolation phonique et une bonne aptitude au formage et a de bonnes perspectives dans des applications telles que des matériaux d'isolation phonique de conduit d'air d'automobile et de revêtement de roue et des matériaux d'isolation phonique de paroi avant. L'invention concerne en outre un procédé de préparation d'une composition de polyéthylène.
PCT/CN2020/125122 2019-12-30 2020-10-30 Composition de polyéthylène et procédé de préparation associé WO2021135599A1 (fr)

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CN201911400096.X 2019-12-30
CN201911400096.XA CN111117036B (zh) 2019-12-30 2019-12-30 一种聚乙烯组合物及其制备方法

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Cited By (2)

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CN114573896A (zh) * 2022-02-18 2022-06-03 日丰新材有限公司 一种高密度聚乙烯双壁波纹管及其制备方法和应用
CN115232433A (zh) * 2022-08-19 2022-10-25 东莞市万铨吸塑包装制品有限公司 一种抗老化的注塑高分子材料及其制备方法

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CN111117036B (zh) * 2019-12-30 2022-04-19 金发科技股份有限公司 一种聚乙烯组合物及其制备方法

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US6809125B1 (en) * 2000-06-02 2004-10-26 Sealed Air Corporation (Us) Foam comprising polyolefin blend and method for producing same
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114573896A (zh) * 2022-02-18 2022-06-03 日丰新材有限公司 一种高密度聚乙烯双壁波纹管及其制备方法和应用
CN114573896B (zh) * 2022-02-18 2022-12-02 日丰新材有限公司 一种高密度聚乙烯双壁波纹管及其制备方法和应用
CN115232433A (zh) * 2022-08-19 2022-10-25 东莞市万铨吸塑包装制品有限公司 一种抗老化的注塑高分子材料及其制备方法

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