WO2007149418A2 - Agents de nucléation pour mousses plastiques - Google Patents

Agents de nucléation pour mousses plastiques Download PDF

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Publication number
WO2007149418A2
WO2007149418A2 PCT/US2007/014240 US2007014240W WO2007149418A2 WO 2007149418 A2 WO2007149418 A2 WO 2007149418A2 US 2007014240 W US2007014240 W US 2007014240W WO 2007149418 A2 WO2007149418 A2 WO 2007149418A2
Authority
WO
WIPO (PCT)
Prior art keywords
internal surface
surface area
area greater
properties
porous
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.)
Ceased
Application number
PCT/US2007/014240
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English (en)
Other versions
WO2007149418A3 (fr
Inventor
L. James Lee
Jyh-Yee Lan
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.)
Ohio State University
WestRock MWV LLC
Original Assignee
Ohio State University
Meadwestvaco Corp
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 Ohio State University, Meadwestvaco Corp filed Critical Ohio State University
Publication of WO2007149418A2 publication Critical patent/WO2007149418A2/fr
Anticipated expiration legal-status Critical
Publication of WO2007149418A3 publication Critical patent/WO2007149418A3/fr
Ceased legal-status Critical Current

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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
    • C08J9/0066—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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0004—Use of compounding ingredients, the chemical constitution of which is unknown, broadly defined, or irrelevant

Definitions

  • the present invention relates generally to polymeric structural and functional foam processing and to systems and methods of manufacture. More particularly, this invention relates to the preparation of plastic foams and the use, as a nucleating agent, of a porous material, such as activated carbon, preferably in a micronized form. More particularly, this invention relates to the preparation of plastic foams and the use of a porous material, such as activated carbon, preferably in a micronized form, as a nucleation agent and functional additives in the foam formation. More particularly, this invention relates to the use of the unique surface area and porosity characteristics of the porous material as nucleating sites to for producing microcellular structural foams.
  • a porous material such as activated carbon
  • this invention relates to the use of the unique surface areas and porosity characteristics of the porous material as adsorbing sites for condensable gaseous and liquid substances, such as hydrocarbons and moisture.
  • the condensable substances may be carried by the activated carbon into the resins and thereafter serve as co-blowing agents for creating desirable polymeric foam structures.
  • this invention relates to the improvement of foam properties, such as better gas retention, higher mechanical strength, and stronger photo-absorption properties as may be desirable in various applications for the foam.
  • Plastic foams are generally of two types, conventional and microcellular.
  • Microcellular foamed materials can be produced by injecting a physical blowing agent into a molten polymeric stream, dispersing the blowing agent in the polymer to form a two-phase mixture of blowing agent cells in polymer, often injecting the mixture into a mold having a desired shape, and allowing the mixture to solidify therein. A pressure drop in the mixture can cause the cells in the polymer to grow.
  • a chemical blowing agent can be used which undergoes a chemical reaction in the polymer material causing formation of a gas.
  • Chemical blowing agents generally are low molecular weight organic compounds that decompose at a critical temperature and release a gas such as nitrogen, carbon dioxide, or carbon monoxide. Under some conditions the cells can be made to remain isolated, and a closed-cell foamed material results. Under other, typically more violent foaming conditions, the cells rupture or become interconnected and an open-cell material results.
  • Polymeric foams containing activated carbon or any other black bodies as additives may result in enhancement of thermal insulation properties, also known as R- value, and structural strengths. This is particularly important as chlorofluorocarbon (CFC) and its derivatives will be banned by 2010.
  • CFC chlorofluorocarbon
  • Other more eco-friendly blowing agents, such as carbon dioxide and pentane, are known to cause a loss of R-value.
  • the foam industry has realized that they need to identify a practical means to compensate the loss of R-value due to the use of non-CFC types of blowing agents.
  • Moisture inherently adhered to the large surface areas of highly porous materials may serve as a co-blowing agent. Furthermore, air may also be trapped in the pores of activated carbon.
  • highly porous material such as activated carbon
  • polymeric resin melt such as polystyrene melt
  • both the surface moisture and the trapped air may be released as co-blowing agents to create unique foam structure.
  • the moisture content in various porous materials varies generally, among various species of such material as well as within a particular species, as it is known that the moisture content of activated carbon can vary. Therefore, it is comprehensible that the foam morphology may vary with porous materials containing different moisture content.
  • Porous material nucleating agents for use in the manufacture of polymeric structural and functional foams include porous carbons with an internal surface area greater than 20 m 2 /g, porous polymers with an internal surface area greater than 20 m 2 /g, porous metal oxide with an internal surface area greater than 20 m 2 /g, aerogels with internal surface area greater than 20 m 2 /g, and templated carbons with an internal surface area greater than 20 m 2 /g, templated metals with internal surface area greater than 20 m 2 /g, templated metal oxides with internal surface area greater than 20 m 2 /g, and templated charred polymers with internal surface area greater than 20 m 2 /g, and combinations of the foregoing.
  • Porous carbons with internal surface area greater than 20 m 2 /g may include charcoal, an activated carbon from any known method including thermal, chemical and a combination thereof, and from active carbon precursors including coal, lignocellulosic materials, including pulp and paper, residues from pulp production, wood (such as wood chips, sawdust, and wood flour), nut shell (such as almond shell and coconut shell), kernel, and fruit pits (such as olive and cherry stones), petroleum, bone, polymer, resin, and blood.
  • Porous carbons with an internal surface area greater than 20 m 2 /g may be derived from carbonized polymers, as well as organic and inorganic porous carrier with carbonized internal surface layer.
  • Porous metal oxides with internal surface area greater than 20 m 2 /g may be derived from alumina, silica, alumina silicate, zeolite, titania, and magnesia, among other porous metallic materials.
  • the porous material nucleating agents for use in the manufacture of polymeric structural and functional foams may exhibit average pore sizes including microporous and/or mesoporous size ranges. Also, such nucleating agents may be functionalized to provide either hydrophilic or hydrophobic properties/attributes. If hydrophilic properties are desired, the agents may be functionalized as phosphates, oxides, and/or salts. If hydrophobic properties are desired, the agents may be functionalized with less than the maximum levels of phosphates, oxides, and/or salts. [0011] The porous nucleating agents may be treated and/or impregnated to achieve effects beyond nucleation. They may be treated with blowing agents and/or reactive precursors to blowing agents.
  • Examples of such treatments, reactive groups, and impregnants include: (1) Chlorine or silicon-halogen derivatives to render the carbon surface hydrophobic for capture of chemical species in humid atmospheres (e.g. , for use in respirators, solvent recovery, vehicle exhaust); (2) Nitrogen-containing agents (ammonia, heterocyclics, hydrogen cyanide, nitrogen, urea) to incorporate nitrogen into the carbon structure and thereby impart catalytic activity for electron exchange reactions (e.g., production of glyphosate herbicide); (3) Hydrogen treated to block edge carbon atoms, thereby rendering the carbon surface largely non-reactive; (4) Chemically reactive species, such as alkalis, alkali salts, sulfur, to impart activity for capture of pollutants through chemical reactions and/or chemisorption ⁇ e.g., capture of VOCs, H 2 S, mercaptans, mercury); (5) Noble metals and metal salts ⁇ e.g., of platinum, palladium) to produce carbon-supported catalysts for a wide range of applications.
  • the improvement in polymeric foam functional properties that may be derived from the use of the invention porous material nucleating agents, and as functional additives, with an internal surface area greater than 20 m 2 /g include infrared absorptive (insulating) properties, ultraviolet screening (photo-degradation retarding) properties, gas and liquid adsorptive properties, mechanical strength properties, and biocidal properties, among others.
  • the improvement in polymeric foam due to the formation of desired morphology that maybe derived from the use of the invention porous material nucleating agents with internal surface area greater than 20 m 2 /g include properties attendant to microcellular foam formation, and to monomodal, bimodal, multimodal cell size creation.
  • the cell size control may be from conventional foam cell size to microcellular size.
  • the cell size control may be from conventional foam cell size to larger ones with the introduction of water and/or other condensable materials as co-blowing agents carried by the porous materials.
  • the foam morphology may be altered from conventional mono-modal to bimodal and/or multimodal with the introduction of water and/or other condensable materials as co-blowing agents carried by the porous materials.
  • the activated carbon also results in additional special functions and properties in regard to the foam material product.
  • Figure 1 is a copy of a scanning electric microscope photograph of a comparison of the effect of activated carbon on polystyrene foams.
  • Figure 2 is a copy of a scanning electric microscope photograph of a cross- section of the foam prepared with activated carbon (in Fig. 1) noting the visible activated carbon particles.
  • Figure 3 depicts the lower TR. transmission of the foam containing 1% activated carbon.
  • the input power was 0.5 watts, and the samples were 7 mm think.
  • Figure 4 depicts the improvement of compressive strength of the polystyrene foam prepared with activated carbon.
  • Figure 5 depicts the impacts of moisture carried by activated carbon on the foam bulk density and thermal conductivity.
  • Figure 6 depicts the impacts of moisture carried by activated carbon on the foam bulk density and IR transmission.
  • the invention encompasses employing porous materials with an internal surface area greater than 20 m 2 /g, including activated carbon particles with an internal surface area greater than 20 m 2 /g, as a new class of nucleating agents and functional additives in the manufacture of polymeric foams, including: (1) Functional Foams — incorporating and enhancing special functional applications properties, such as odor depletion, gas retention, structural strength, infra-red (IR) absorption, ultraviolet (UV) screening, biocidal properties, and thermal insulation, to conventional foam performance;
  • Functional Foams incorporating and enhancing special functional applications properties, such as odor depletion, gas retention, structural strength, infra-red (IR) absorption, ultraviolet (UV) screening, biocidal properties, and thermal insulation, to conventional foam performance;
  • Ultra Low Density (ULD) foams to allow manufacturing ULD foams without special capital equipment
  • Microcellular Foams lighter weight (less raw materials) plastic parts with equivalent or better mechanical performance.
  • foam fabrication involves the manufacturing of a lightweight, versatile, polymer-based material called foam.
  • the material such as plastic or polyurethane
  • the material is "frothed up" while in a molten state and then cooled, which fills the material with countless little bubbles, giving it an appearance similar to a sponge.
  • Foams are classified into two categories: open-cell and closed-cell. In closed-cell foam, each little air pocket, or cell, is completely enclosed by a thin wall. The individual cells are interconnected in open-cell foams.
  • Polyurethane foam applications typically include surgical scrubbers, x-ray positioning pads, EKG pads, insulation, protective padding, custom insulated containers and the list continues.
  • Ethafoam is generally used for packaging.
  • Polyether foam is a low-cost polyurethane foam that provides good cushioning and has good acoustics and packaging properties.
  • Polyvinyl chloride (PVC) foam is a vinyl foam that is pliable and soft and often used in gasketing to prevent water transmission.
  • Expanded polystyrene (EPS) is being used in some various applications, including ladies bedroom slippers, air conditioners, home insulation, protective helmets, smokestack scrubbers, medical transportation, seafood transportation, oil rigs, weather balloons and satellites.
  • Plastic foam also called “foamed plastic” or “cellular plastic”
  • cellular plastic is a material that consists of many gas bubbles dispersed in a solid plastic phase, which forms the matrix.
  • the cellular structure in plastics may be formed by physical, chemical or mechanical means.
  • the material to be foamed is in a liquid or plastic state during part of the process, no matter the method.
  • Flexible polyurethane foam FPF has many uses, such as carpet padding, upholstered furniture, automotive, bedding, sponges, toys, packaging, sound deadening, etc.
  • FPF can be fabricated by either the slabstock process, which produces large continuous buns of foam that are later converted into desired shapes, or the molding process.
  • the slabstock process consists of precisely metering, temperature controlled ingredients of the formulations to a mixing head and then depositing the liquid mixture onto a moving conveyor.
  • the chemical reactions involved generate the foaming mass as well as the heat necessary to cure the resulting foam.
  • the initially closed cell structure is converted to an open cell structure.
  • the major ingredients involved are a Polyol, a Diisocyanate (usually Toluene Diisocyanate -TDI) and water.
  • Other ingredients include an emulsif ⁇ er to stabilize the rising foam, several catalysts to control the reaction rates, and a number of optional ingredients such as colors, combustion modifying additives, auxiliary blowing agents, fillers and other materials as needed to achieve special properties for the FPF.
  • Toluene Diisocyanate chemically reacts with the water to produce Carbon Dioxide gas (the primary foaming agent) and chemical structures called ureas. It also reacts with the polyol to produce chemical structures called urethanes that give the product its name.
  • nucleation is the onset of a phase transition in a small but stable region.
  • the phase transition can be the formation of a gas or of a crystal from a liquid. It is this cell formation that produces the individual cells that create foam.
  • nucleation can occur in the absence a nucleating agent, such agent can affect the cell/foam development and, thereby, change the character and properties of the foam.
  • cell size or sizes is a key factor governing the polymeric foam peorformance properties. Generally speaking, larger cell sized foams reveal better thermal insulation, while smaller cell sized foam displays better mechanical strengths.
  • Highly porous material with internal surface area greater than 20 m 2 /g such as activated carbon, can adsorb/desorb many other liquid and gaseous substances such as water, alcohols, and heavy hydrocarbons.
  • the adsorbed liquids or gases can thereafter become the co-blowing agents for making polymeric foams with unique morphology.
  • Activated carbon exhibiting an internal surface area greater than 20 m 2 /g from MeadWestvaco Corporation was micronized by grinding to approximate micron size range and blended with resins in dry form. This blend was then fed into the foaming apparatus/pilot line under normal foam conditions. No special handling was necessary. The resulting foam was viewed via scanning electron microscope and the photographs were taken that appear in Figures 1 and 2 as the activated carbon-containing foam for comparison with foam prepared under identical conditions without the activated carbon.
  • Figure 1 shows the much smaller cell size achieved with activated carbon used as a nucleating agent. A cell size reduction from approximately 30 microns to approximately 18 microns was achieved.
  • Figure 2 indicates the un-optimized particle size of the activated carbon particles of from approximately 1 micron to approximately 5 microns.
  • Figure 3 depicts the IR absorption by the addition of activated carbon. In this specific case, the cell size remained unchanged so that the thermal insulation would only be affected by ER. absorption.
  • the activated carbon used in this particular case has a median particle diameter of 40 microns.
  • Figure 4 provides evidence of compressive strength improvement resulted from addition of activated carbon.
  • the median particle diameter of the activated carbon powder is around 40 microns.
  • Figure 5 and Figure 6 show the impact on foam density (an indirect hint of inverse relationship to foam cell size) by addition of different nucleating agents.
  • the activated carbon used in this case has a media particle diameter of 40 microns. The loading remained at 1% on every case. However, the activated carbon powders were pre-treated in order to carry different amount of water to the polystyrene melts. It was clear that IR transmission was significantly reduced by addition of 1% activated carbon. It was further clear that, under an uncontrolled procedure to add activated carbon directly to the polystyrene melts, only a fixed small amount of water remianed in activated carbon. The majority was evaporated before the subsequent foaming process.

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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)
  • General Chemical & Material Sciences (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

L'invention concerne l'utilisation de matériaux hautement poreux ayant une aire de surface interne supérieure à 20 m2/g en tant qu'agents de nucléation et additifs fonctionnels dans la préparation de mousses polymères afin de moduler la taille des cellules, d'incorporer de nouvelles propriétés ou d'améliorer les propriétés des mousses classiques.
PCT/US2007/014240 2006-06-22 2007-06-19 Agents de nucléation pour mousses plastiques Ceased WO2007149418A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US80430906P 2006-06-22 2006-06-22
US60/804,309 2006-06-22

Publications (2)

Publication Number Publication Date
WO2007149418A2 true WO2007149418A2 (fr) 2007-12-27
WO2007149418A3 WO2007149418A3 (fr) 2009-04-09

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2096135A1 (fr) 2008-02-27 2009-09-02 Airsec Préparation de polymère moussant et compositions comportant un polymère moussant et avec une absorption de l'eau rapide et importante
NL1036039C (nl) * 2008-10-09 2010-04-12 Synbra Tech Bv Deeltjesvormig, expandeerbaar polymeer, werkwijze ter vervaardiging van deeltjesvormig expandeerbaar polymeer, alsmede een bijzondere toepassing van het verkregen schuimmateriaal.
US20110306691A1 (en) * 2010-06-11 2011-12-15 Fina Technology, Inc. Foamed Articles Exhibiting Improved Thermal Properties
US20140128488A1 (en) * 2011-06-29 2014-05-08 Dow Global Technologies Llc Method for Making Organic Foam Composites Containing Aerogel Particles
US20140343184A1 (en) * 2011-12-22 2014-11-20 Solvay Specialty Polymers Usa, Llc. Thermoformed foam articles
WO2018193249A1 (fr) * 2017-04-18 2018-10-25 University Of Bath Filtres à air
EP3412319A1 (fr) * 2017-06-09 2018-12-12 Mölnlycke Health Care AB Mousse pour le traitement d'une plaie
WO2022010940A1 (fr) * 2020-07-07 2022-01-13 Newlight Technologies, Inc. Compositions à base de polyhydroxyalcanoate et articules fabriqués à partir de celles-ci
US20230131319A1 (en) * 2020-04-03 2023-04-27 Evonik Operations Gmbh PEI or PEI-PEEK particle foams for applications in lightweight construction
US11965203B2 (en) 2012-03-29 2024-04-23 Newlight Technologies, Inc. Polyhydroxyalkanoate production methods and materials and microorganisms used in same
US12037628B2 (en) 2009-08-27 2024-07-16 Newlight Technologies, Inc. Polyhydroxyalkanoate production and related processes
US12060597B2 (en) 2011-12-02 2024-08-13 Newlight Technologies, Inc. Polyhydroxyalkanoate production methods and systems for same
EP4450531A1 (fr) 2023-04-20 2024-10-23 Uniwersytet Kazimierza Wielkiego Procédé d'obtention de matériaux polyols réactifs à partir de déchets de biomasse agricole et leur utilisation dans la fabrication de matériaux d'isolation thermique en mousse ignifuge
US12312629B2 (en) 2012-03-29 2025-05-27 Newlight Technologies, Inc. Polyhydroxyalkanoate production methods and materials and microorganisms used in same
US12571012B2 (en) 2007-02-20 2026-03-10 Newlight Technologies, Inc. Polyhydroxyalkanoic acid compositions and methods for generating same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR76363E (fr) * 1959-09-29 1961-10-06 Jacques Janot Procédé d'obtention d'effets décoratifs sur napperons ou articles d'ameublement en matière plastique et produits en résultant
TR200002398T2 (tr) * 1997-12-18 2000-11-21 The Dow Chemical Company HFC-134 ve düşük çözünürlüklü bir yardımcı şişirme maddesi ihtiva eden köpükler ve bir hazırlama yöntemi
US7307105B2 (en) * 2004-09-03 2007-12-11 Pactiv Corporation Thermoplastic foams made with methyl formate-based blowing agents

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12571012B2 (en) 2007-02-20 2026-03-10 Newlight Technologies, Inc. Polyhydroxyalkanoic acid compositions and methods for generating same
EP2096135A1 (fr) 2008-02-27 2009-09-02 Airsec Préparation de polymère moussant et compositions comportant un polymère moussant et avec une absorption de l'eau rapide et importante
KR101726453B1 (ko) 2008-10-09 2017-04-12 신브라 테크놀로지 비.브이. 팽창성 미립 중합체, 상기 팽창성 미립 중합체의 제조 방법 및 이로부터 수득된 폼 물질의 특수 용도
NL1036039C (nl) * 2008-10-09 2010-04-12 Synbra Tech Bv Deeltjesvormig, expandeerbaar polymeer, werkwijze ter vervaardiging van deeltjesvormig expandeerbaar polymeer, alsmede een bijzondere toepassing van het verkregen schuimmateriaal.
WO2010041936A3 (fr) * 2008-10-09 2010-09-30 Synbra Technology B.V. Polymère particulaire expansible, procédé de production d'un polymère particulaire expansible, et utilisation spéciale du matériau de mousse obtenu
KR20110079715A (ko) * 2008-10-09 2011-07-07 신브라 테크놀로지 비.브이. 팽창성 미립 중합체, 상기 팽창성 미립 중합체의 제조 방법 및 이로부터 수득된 폼 물질의 특수 용도
JP2012505288A (ja) * 2008-10-09 2012-03-01 シンブラ テクノロジー ベー ヴェー 粒子状発泡性ポリマー、粒子状発泡性ポリマーの製造方法、並びに、得られた発泡体材料の特殊な使用
US12037628B2 (en) 2009-08-27 2024-07-16 Newlight Technologies, Inc. Polyhydroxyalkanoate production and related processes
US20110306691A1 (en) * 2010-06-11 2011-12-15 Fina Technology, Inc. Foamed Articles Exhibiting Improved Thermal Properties
US20150011665A1 (en) * 2010-06-11 2015-01-08 Fina Technology, Inc. Foamed Articles Exhibiting Improved Thermal Properties
US9815957B2 (en) * 2010-06-11 2017-11-14 Fina Technology, Inc. Foamed articles exhibiting improved thermal properties
US8889752B2 (en) * 2010-06-11 2014-11-18 Fina Technology, Inc. Foamed articles exhibiting improved thermal properties
US20140128488A1 (en) * 2011-06-29 2014-05-08 Dow Global Technologies Llc Method for Making Organic Foam Composites Containing Aerogel Particles
US12060597B2 (en) 2011-12-02 2024-08-13 Newlight Technologies, Inc. Polyhydroxyalkanoate production methods and systems for same
US20140343184A1 (en) * 2011-12-22 2014-11-20 Solvay Specialty Polymers Usa, Llc. Thermoformed foam articles
US12312629B2 (en) 2012-03-29 2025-05-27 Newlight Technologies, Inc. Polyhydroxyalkanoate production methods and materials and microorganisms used in same
US11965203B2 (en) 2012-03-29 2024-04-23 Newlight Technologies, Inc. Polyhydroxyalkanoate production methods and materials and microorganisms used in same
WO2018193249A1 (fr) * 2017-04-18 2018-10-25 University Of Bath Filtres à air
US11779874B2 (en) 2017-04-18 2023-10-10 University Of Bath Air filters
CN110691637A (zh) * 2017-04-18 2020-01-14 巴斯大学 空气过滤器
US11224676B2 (en) 2017-06-09 2022-01-18 Mölnlycke Health Care Ab Foam in wound treatment
JP2020522294A (ja) * 2017-06-09 2020-07-30 メンリッケ・ヘルス・ケア・アーベー 創傷治療におけるフォーム
WO2018224499A1 (fr) * 2017-06-09 2018-12-13 Mölnlycke Health Care Ab Mousse dans le traitement de plaies
EP3412319A1 (fr) * 2017-06-09 2018-12-12 Mölnlycke Health Care AB Mousse pour le traitement d'une plaie
US20230131319A1 (en) * 2020-04-03 2023-04-27 Evonik Operations Gmbh PEI or PEI-PEEK particle foams for applications in lightweight construction
WO2022010940A1 (fr) * 2020-07-07 2022-01-13 Newlight Technologies, Inc. Compositions à base de polyhydroxyalcanoate et articules fabriqués à partir de celles-ci
EP4450531A1 (fr) 2023-04-20 2024-10-23 Uniwersytet Kazimierza Wielkiego Procédé d'obtention de matériaux polyols réactifs à partir de déchets de biomasse agricole et leur utilisation dans la fabrication de matériaux d'isolation thermique en mousse ignifuge

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