CN112175227A - Preparation method of polyetherimide foam particles - Google Patents
Preparation method of polyetherimide foam particles Download PDFInfo
- Publication number
- CN112175227A CN112175227A CN202011108771.4A CN202011108771A CN112175227A CN 112175227 A CN112175227 A CN 112175227A CN 202011108771 A CN202011108771 A CN 202011108771A CN 112175227 A CN112175227 A CN 112175227A
- Authority
- CN
- China
- Prior art keywords
- polyetherimide
- raw material
- pressure
- preparing
- reaction kettle
- 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
Links
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
- C08J9/12—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 physical blowing agent
- C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
-
- 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
- B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
-
- 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
- B29C44/3415—Heating or cooling
-
- 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
- C08J2201/00—Foams characterised by the foaming process
- C08J2201/02—Foams characterised by the foaming process characterised by mechanical pre- or post-treatments
- C08J2201/03—Extrusion of the foamable blend
-
- 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
- C08J2379/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2361/00 - C08J2377/00
- C08J2379/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08J2379/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
Landscapes
- 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)
- Mechanical Engineering (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention discloses a preparation method of polyetherimide expanded particles, which comprises the steps of 1, preparing a polyetherimide raw material, 2, putting the prepared polyetherimide raw material into an extruder for hot melting, 3, extruding the hot melted polyetherimide raw material into a mold from the extruder for thermoplastic molding, and 4, compressing and curing the imide raw material in the mold to obtain a polyetherimide expanded molded body. The method comprises the steps of carrying out hot melting on a polyetherimide raw material, extruding the hot-melted polyetherimide raw material into a die from an extruder for thermoplastic molding, compressing and curing the imide raw material in the die to obtain a polyetherimide foam molded body, and compressing, heating and curing to obtain the polyetherimide foam molded body.
Description
Technical Field
The invention relates to the technical field of polyetherimide expanded particles, in particular to a preparation method of the polyetherimide expanded particles.
Background
Polyetherimide (PEI) is super engineering plastic manufactured by amorphous Polyetherimide, has the best high temperature resistance and dimensional stability, chemical resistance, flame retardance, electrical property, high strength, high rigidity and the like, PEI resin can be widely applied to high temperature resistant terminals, IC bases, lighting equipment, FPCB (flexible printed circuit board), liquid conveying equipment, airplane internal parts, medical equipment, household appliances and the like, Polyetherimide foam has the characteristics of excellent high and low temperature resistance, self-flame retardance, low smoke, no toxicity, radiation resistance and the like, and therefore the PEI resin is widely applied to the high-tech fields of aviation, spaceflight, naval vessels, rail transit and the like. The polyetherimide foam is mainly prepared by polymerizing small-molecular dianhydride and diamine monomers to obtain polyetherimide, and foaming and crosslinking the polyetherimide in the subsequent imidization process to prepare the polyetherimide foam. Due to the problems of long technical route, low production efficiency, incomplete imidization, difficult removal of high-temperature solvent, serious product slag falling and the like, the polyetherimide foam material has extremely high price and uneven product quality.
The existing preparation method of polyetherimide foam material mainly comprises paste foaming method, powder foaming method and microsphere foaming method. The paste foaming method adopts high-solid-content polyetherimide precursor paste to perform heating foaming, the density of the polyetherimide foam material can be adjusted by controlling the solid content of the paste, and the density of the polyetherimide foam material prepared by the method can be as low as 2kg/m 3. The powder foaming method comprises the steps of firstly blending aromatic tetraacid, aromatic polyamine and diamine disiloxane in a certain proportion to prepare polyetherimide precursor powder, and then heating the polyetherimide precursor powder to 300-500 ℃ to prepare the polyetherimide foaming material with the apparent density of less than 70kg/m 3. The microsphere method comprises the steps of firstly preparing polyetherimide precursor powder, then heating to pre-foam the polyetherimide powder into partially imidized microspheres, and finally heating the partially imidized microspheres at a higher temperature to prepare the polyetherimide foam material.
The existing domestic and foreign documents disclose methods for preparing low-density polyetherimide foam materials by chemical foaming and physical foaming, and the foam materials prepared by the methods are light in weight (namely the foam materials are low in density, and the density of the common foam materials is 50-300 Kg/m3), the cell size is more than 200 microns, and a certain degree of open pore structure exists. The existence of the large-size cellular structure obviously reduces the mechanical property of the material, and in the construction process, the low-density polyetherimide foam material often has small-size powder to be peeled off, so that the physical health of operators is damaged, and potential safety hazards also exist; and the low-density polyetherimide foam material often contains a large amount of functional particles, the functional particles are peeled off during construction and use to weaken the functionality of the material, and in addition, the low-density polyetherimide foam material has high water absorption, which limits the application range of the material.
However, in the production of the polyether imide foamed particles, the polyether imide foamed particles have insufficiently uniform cells, and therefore, the stretching effect is poor, which affects the use of the polyether imide foamed particles, and the properties of the polyether imide foamed particle molded body are unstable, and a large amount of powder is likely to fall off during the use of the polyether imide foamed molded body, which affects the production of the polyether imide foamed particles.
Disclosure of Invention
The invention provides a preparation method of polyetherimide expanded particles, which is used for solving the technical problems that the polyetherimide expanded particles proposed by the background technology are not uniform enough in cells, poor in stretching effect, unstable in performance of a polyetherimide expanded particle molded body and easy to generate a large amount of powder falling off in the using process of the polyetherimide expanded molded body.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a method for preparing polyetherimide expanded particles comprises the following processing steps,
preparation work: polyetherimide raw materials, a reaction kettle, a high-pressure mixed fluid agent and a mold;
step 1, preparing a polyetherimide raw material;
step 2, putting the prepared polyetherimide raw material into an extruder for hot melting;
3, extruding the hot-melted polyetherimide raw material from an extruder into a mould for thermoplastic molding;
step 4, compressing and curing the imide raw material in a mould to obtain a polyetherimide foaming forming body;
step 5, pouring the polyetherimide foam forming body into a reaction kettle for high-pressure reaction;
and 6, injecting high-pressure mixed fluid into the reaction kettle to obtain the polyetherimide expanded particles.
Preferably, the high-pressure mixed fluid in step 1 comprises supercritical fluid carbon dioxide and organic solvent group.
Preferably, the hot melt temperature of the polyetherimide starting material in step 2 is in the range of 110 ℃ to 160 ℃.
Preferably, the polyetherimide raw material in the step 3 is subjected to thermoplasticity, and the thermoplastic temperature of a mould is 130-170 ℃.
Preferably, the organic solvent in step 6 includes at least one of ethanol, pyridine and tetrahydrofuran.
Preferably, the pressure in the reaction kettle in the step 5 and the step 6 is in the pressure range of 10MPa-20 MPa.
Preferably, the ratio of carbon dioxide to organic solvent in step 6 is 2: 1.
compared with the prior art, the invention has the beneficial effects that: the method comprises the steps of carrying out hot melting on a polyetherimide raw material, extruding the hot-melted polyetherimide raw material into a mould from an extruder for thermoplastic molding, compressing and curing the imide raw material in the mould to obtain a polyetherimide foam forming body, compressing, heating and curing to obtain the polyetherimide foam forming body, wherein on one hand, the polyetherimide foam forming body has stable performance due to light polyetherimide foam particles with good mechanical properties, on the other hand, the size and the shape of the polyetherimide foam forming body are controllable, pouring the polyetherimide foam forming body into a reaction kettle for high-pressure reaction, then injecting high-pressure mixed fluid into the reaction kettle to obtain the polyetherimide foam particles, and due to the injection of saturated mixed fluid, the polyetherimide foam particles obtained in the embodiment of the invention have optimal texture flexibility, uniformity of a cellular structure and tensile property, the preparation of polyetherimide expanded particles is convenient.
Detailed Description
In order to make the technical means, inventive features, objectives and effects realized by the present invention easy to understand and understand, the present invention is further described below with reference to the specific embodiments.
In the case of the example 1, the following examples are given,
preparation work: polyetherimide raw materials, a reaction kettle, a high-pressure mixed fluid agent and a mold;
step 1, preparing a polyetherimide raw material;
step 2, putting the prepared polyetherimide raw material into an extruder for hot melting, wherein the hot melting temperature is 110 ℃;
step 3, extruding the hot-melted polyetherimide raw material from an extruder into a mould for thermoplastic molding, wherein the thermoplastic temperature is 130 ℃;
step 4, compressing and curing the imide raw material in a mould to obtain a polyetherimide foaming forming body;
step 5, pouring the polyetherimide foam forming body into a reaction kettle for high-pressure reaction, wherein the pressure in the reaction kettle is 10 MPa;
and 6, injecting high-pressure mixed fluid into the reaction kettle to obtain the polyetherimide expanded particles.
Preferably, the high-pressure mixed fluid in step 1 comprises supercritical fluid carbon dioxide and organic solvent group.
Preferably, the hot melt temperature of the polyetherimide starting material in step 2 is in the range of 110 ℃ to 160 ℃.
Preferably, the polyetherimide raw material in the step 3 is subjected to thermoplasticity, and the thermoplastic temperature of a mould is 130-170 ℃.
Preferably, the organic solvent in step 6 includes at least one of ethanol, pyridine and tetrahydrofuran.
Preferably, the pressure in the reaction kettle in the step 5 and the step 6 is in the pressure range of 10MPa-20 MPa.
Preferably, the ratio of carbon dioxide to organic solvent in step 6 is 2: 1.
in the case of the example 2, the following examples are given,
preparation work: polyetherimide raw materials, a reaction kettle, a high-pressure mixed fluid agent and a mold;
step 1, preparing a polyetherimide raw material;
step 2, putting the prepared polyetherimide raw material into an extruder for hot melting, wherein the hot melting temperature is 120 ℃;
step 3, extruding the hot-melted polyetherimide raw material from an extruder into a mould for thermoplastic molding, wherein the thermoplastic temperature is 140 ℃;
step 4, compressing and curing the imide raw material in a mould to obtain a polyetherimide foaming forming body;
step 5, pouring the polyetherimide foam forming body into a reaction kettle for high-pressure reaction, wherein the pressure in the reaction kettle is 12 MPa;
and 6, injecting high-pressure mixed fluid into the reaction kettle to obtain the polyetherimide expanded particles.
Preferably, the high-pressure mixed fluid in step 1 comprises supercritical fluid carbon dioxide and organic solvent group.
Preferably, the hot melt temperature of the polyetherimide starting material in step 2 is in the range of 110 ℃ to 160 ℃.
Preferably, the polyetherimide raw material in the step 3 is subjected to thermoplasticity, and the thermoplastic temperature of a mould is 130-170 ℃.
Preferably, the organic solvent in step 6 includes at least one of ethanol, pyridine and tetrahydrofuran.
Preferably, the pressure in the reaction kettle in the step 5 and the step 6 is in the pressure range of 10MPa-20 MPa.
Preferably, the ratio of carbon dioxide to organic solvent in step 6 is 2: 1
In the case of the example 3, the following examples are given,
preparation work: polyetherimide raw materials, a reaction kettle, a high-pressure mixed fluid agent and a mold;
step 1, preparing a polyetherimide raw material;
step 2, putting the prepared polyetherimide raw material into an extruder for hot melting, wherein the hot melting temperature is 130 ℃;
step 3, extruding the hot-melted polyetherimide raw material from an extruder into a mould for thermoplastic molding, wherein the thermoplastic temperature is 150 ℃;
step 4, compressing and curing the imide raw material in a mould to obtain a polyetherimide foaming forming body;
step 5, pouring the polyetherimide foam forming body into a reaction kettle for high-pressure reaction, wherein the pressure in the reaction kettle is 14 MPa;
and 6, injecting high-pressure mixed fluid into the reaction kettle to obtain the polyetherimide expanded particles.
Preferably, the high-pressure mixed fluid in step 1 comprises supercritical fluid carbon dioxide and organic solvent group.
Preferably, the hot melt temperature of the polyetherimide starting material in step 2 is in the range of 110 ℃ to 160 ℃.
Preferably, the polyetherimide raw material in the step 3 is subjected to thermoplasticity, and the thermoplastic temperature of a mould is 130-170 ℃.
Preferably, the organic solvent in step 6 includes at least one of ethanol, pyridine and tetrahydrofuran.
Preferably, the pressure in the reaction kettle in the step 5 and the step 6 is in the pressure range of 10MPa-20 MPa.
Preferably, the ratio of carbon dioxide to organic solvent in step 6 is 2: 1.
in the case of the example 4, the following examples are given,
preparation work: polyetherimide raw materials, a reaction kettle, a high-pressure mixed fluid agent and a mold;
step 1, preparing a polyetherimide raw material;
step 2, putting the prepared polyetherimide raw material into an extruder for hot melting, wherein the hot melting temperature is 140 ℃;
step 3, extruding the hot-melted polyetherimide raw material from an extruder into a mould for thermoplastic molding, wherein the thermoplastic temperature is 160 ℃;
step 4, compressing and curing the imide raw material in a mould to obtain a polyetherimide foaming forming body;
step 5, pouring the polyetherimide foam forming body into a reaction kettle for high-pressure reaction, wherein the pressure in the reaction kettle is 16 MPa;
and 6, injecting high-pressure mixed fluid into the reaction kettle to obtain the polyetherimide expanded particles.
Preferably, the high-pressure mixed fluid in step 1 comprises supercritical fluid carbon dioxide and organic solvent group.
Preferably, the hot melt temperature of the polyetherimide starting material in step 2 is in the range of 110 ℃ to 160 ℃.
Preferably, the polyetherimide raw material in the step 3 is subjected to thermoplasticity, and the thermoplastic temperature of a mould is 130-170 ℃.
Preferably, the organic solvent in step 6 includes at least one of ethanol, pyridine and tetrahydrofuran.
Preferably, the pressure in the reaction kettle in the step 5 and the step 6 is in the pressure range of 10MPa-20 MPa.
Preferably, the ratio of carbon dioxide to organic solvent in step 6 is 2: 1.
in the case of the example 5, the following examples were conducted,
preparation work: polyetherimide raw materials, a reaction kettle, a high-pressure mixed fluid agent and a mold;
step 1, preparing a polyetherimide raw material;
step 2, putting the prepared polyetherimide raw material into an extruder for hot melting, wherein the hot melting temperature is 150 ℃;
step 3, extruding the hot-melted polyetherimide raw material from an extruder into a mould for thermoplastic molding, wherein the thermoplastic temperature is 170 ℃;
step 4, compressing and curing the imide raw material in a mould to obtain a polyetherimide foaming forming body;
step 5, pouring the polyetherimide foam forming body into a reaction kettle for high-pressure reaction, wherein the pressure in the reaction kettle is 18 MPa;
and 6, injecting high-pressure mixed fluid into the reaction kettle to obtain the polyetherimide expanded particles.
Preferably, the high-pressure mixed fluid in step 1 comprises supercritical fluid carbon dioxide and organic solvent group.
Preferably, the hot melt temperature of the polyetherimide starting material in step 2 is in the range of 110 ℃ to 160 ℃.
Preferably, the polyetherimide raw material in the step 3 is subjected to thermoplasticity, and the thermoplastic temperature of a mould is 130-170 ℃.
Preferably, the organic solvent in step 6 includes at least one of ethanol, pyridine and tetrahydrofuran.
Preferably, the pressure in the reaction kettle in the step 5 and the step 6 is in the pressure range of 10MPa-20 MPa.
Preferably, the ratio of carbon dioxide to organic solvent in step 6 is 2: 1.
in the case of the example 6, it is shown,
preparation work: polyetherimide raw materials, a reaction kettle, a high-pressure mixed fluid agent and a mold;
step 1, preparing a polyetherimide raw material;
step 2, putting the prepared polyetherimide raw material into an extruder for hot melting, wherein the hot melting temperature is 160 ℃;
step 3, extruding the hot-melted polyetherimide raw material from an extruder into a mould for thermoplastic molding, wherein the thermoplastic temperature is 170 ℃;
step 4, compressing and curing the imide raw material in a mould to obtain a polyetherimide foaming forming body;
step 5, pouring the polyetherimide foam forming body into a reaction kettle for high-pressure reaction, wherein the pressure in the reaction kettle is 20 MPa;
and 6, injecting high-pressure mixed fluid into the reaction kettle to obtain the polyetherimide expanded particles.
Preferably, the high-pressure mixed fluid in step 1 comprises supercritical fluid carbon dioxide and organic solvent group.
Preferably, the hot melt temperature of the polyetherimide starting material in step 2 is in the range of 110 ℃ to 160 ℃.
Preferably, the polyetherimide raw material in the step 3 is subjected to thermoplasticity, and the thermoplastic temperature of a mould is 130-170 ℃.
Preferably, the organic solvent in step 6 includes at least one of ethanol, pyridine and tetrahydrofuran.
Preferably, the pressure in the reaction kettle in the step 5 and the step 6 is in the pressure range of 10MPa-20 MPa.
Preferably, the ratio of carbon dioxide to organic solvent in step 6 is 2: 1.
the above examples only show certain embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A preparation method of polyetherimide expanded particles is characterized by comprising the following processing steps,
preparation work: polyetherimide raw materials, a reaction kettle, a high-pressure mixed fluid agent and a mold;
firstly, preparing a polyetherimide raw material;
step (2), putting the prepared polyetherimide raw material into an extruder for hot melting;
extruding the hot-melted polyetherimide raw material from an extruder into a mould for thermoplastic molding;
step (4), compressing and curing the imide raw material in a mould to obtain a polyetherimide foaming forming body;
pouring the polyetherimide foam forming body into a reaction kettle for high-pressure reaction;
and (6) injecting high-pressure mixed fluid into the reaction kettle to obtain the polyetherimide expanded particles.
2. The method for preparing polyetherimide expanded particles according to claim 1, wherein the high-pressure mixed fluid in step (1) comprises supercritical fluid carbon dioxide and an organic solvent group.
3. The method for preparing expanded polyetherimide particles of claim 1, wherein the polyetherimide starting material in step (2) has a hot melt temperature of 110 ℃ to 160 ℃.
4. The method for preparing expanded polyetherimide particles in accordance with claim 1, wherein the polyetherimide composition in step (3) is subjected to thermoplasticity at a mold temperature of 130 ℃ to 170 ℃.
5. The method for preparing polyetherimide expanded particles according to claim 1, wherein the organic solvent in step (6) comprises at least one of ethanol, pyridine and tetrahydrofuran.
6. The method for preparing polyetherimide expanded particles according to claim 1, wherein the pressure in the reaction kettle in the step (5) and the step (6) is in a pressure range of 10MPa to 20 MPa.
7. The method for preparing polyetherimide expanded particles according to claim 1, wherein the ratio of the carbon dioxide to the organic solvent in step (6) is 2: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011108771.4A CN112175227A (en) | 2020-10-16 | 2020-10-16 | Preparation method of polyetherimide foam particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011108771.4A CN112175227A (en) | 2020-10-16 | 2020-10-16 | Preparation method of polyetherimide foam particles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112175227A true CN112175227A (en) | 2021-01-05 |
Family
ID=73950624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011108771.4A Pending CN112175227A (en) | 2020-10-16 | 2020-10-16 | Preparation method of polyetherimide foam particles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112175227A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090163610A1 (en) * | 2007-12-20 | 2009-06-25 | Lanning Vincent L | Continuous process for making polyetherimide foam materials and articles made therefrom |
| CN102702562A (en) * | 2012-05-24 | 2012-10-03 | 中国科学院宁波材料技术与工程研究所 | Preparation method for thermoplastic polyimide foaming particle and formed body thereof |
| CN102702561A (en) * | 2012-05-25 | 2012-10-03 | 中国科学院宁波材料技术与工程研究所 | Preparation method of low-density thermoplastic polyimide micro-foamed material |
| WO2013053851A1 (en) * | 2011-10-12 | 2013-04-18 | Solvay Specialty Polymers Usa, Llc | Polyetherimide/ poly(biphenyl ether sulfone) foam materials |
| CN108659251A (en) * | 2017-03-29 | 2018-10-16 | 深圳市科聚新材料有限公司 | The preparation method of polyetherimide expanded particle |
-
2020
- 2020-10-16 CN CN202011108771.4A patent/CN112175227A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090163610A1 (en) * | 2007-12-20 | 2009-06-25 | Lanning Vincent L | Continuous process for making polyetherimide foam materials and articles made therefrom |
| WO2013053851A1 (en) * | 2011-10-12 | 2013-04-18 | Solvay Specialty Polymers Usa, Llc | Polyetherimide/ poly(biphenyl ether sulfone) foam materials |
| CN102702562A (en) * | 2012-05-24 | 2012-10-03 | 中国科学院宁波材料技术与工程研究所 | Preparation method for thermoplastic polyimide foaming particle and formed body thereof |
| CN102702561A (en) * | 2012-05-25 | 2012-10-03 | 中国科学院宁波材料技术与工程研究所 | Preparation method of low-density thermoplastic polyimide micro-foamed material |
| CN108659251A (en) * | 2017-03-29 | 2018-10-16 | 深圳市科聚新材料有限公司 | The preparation method of polyetherimide expanded particle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103275319B (en) | Polyimide foam and preparation method thereof | |
| CN107540839B (en) | Light sound-absorbing heat-insulating polyimide foam material and preparation method thereof | |
| CN101812232B (en) | Polyimide foam and preparation method thereof | |
| US6576683B2 (en) | Aromatic polyimide foam | |
| CN102702562A (en) | Preparation method for thermoplastic polyimide foaming particle and formed body thereof | |
| CN102093714A (en) | Light flexible polymide foam material and preparation method thereof | |
| CN105153422B (en) | A kind of Polyimide foams and preparation method thereof | |
| CN101343413B (en) | Bimaleimide foam material and preparation thereof | |
| CN102134396A (en) | Light flexible polyimide foam material and preparation method thereof | |
| CN102964834A (en) | High temperature-resistant anti-compression cross-linking polyimide foam material and preparation method and application thereof | |
| CN110028668A (en) | A kind of preparation method of hard polyimide foaming material | |
| CN110655790A (en) | Production method of polyimide foam material | |
| CN105801902B (en) | A kind of polyimides composite foam material and preparation method thereof | |
| CN113788979B (en) | Hard closed-cell polyimide foam and preparation method thereof | |
| CN113817212B (en) | Benzoxazine nitrile resin sandwich structure foam and preparation method thereof | |
| CN103709749B (en) | A kind of Polyimide foams and preparation method thereof | |
| CN103382260A (en) | Production method of polyether ketone and modified nano silicon dioxide foaming materials and by supercritical carbon dioxide | |
| CN112175227A (en) | Preparation method of polyetherimide foam particles | |
| CN108659251A (en) | The preparation method of polyetherimide expanded particle | |
| CN106146840B (en) | A kind of Polyimide foams and preparation method thereof | |
| CN108659254A (en) | The preparation method of polyetherimide expanded moldings | |
| CN104497343B (en) | A kind of preparation method of Polymethacrylimide micro-foaming material and products thereof | |
| CN114874594B (en) | High-resilience wave-absorbing foam material and preparation method thereof | |
| CN116987318A (en) | Polyarylester film and polyimide foam composite material and preparation method thereof | |
| CN115418020B (en) | Recycling method of polyimide foam waste |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210105 |
|
| RJ01 | Rejection of invention patent application after publication |