CN114561056A - Low-thermal conductivity XPE foam and preparation method thereof - Google Patents
Low-thermal conductivity XPE foam and preparation method thereof Download PDFInfo
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- CN114561056A CN114561056A CN202210176082.XA CN202210176082A CN114561056A CN 114561056 A CN114561056 A CN 114561056A CN 202210176082 A CN202210176082 A CN 202210176082A CN 114561056 A CN114561056 A CN 114561056A
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- 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
- C08J9/10—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 nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/102—Azo-compounds
- C08J9/103—Azodicarbonamide
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- 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
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
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- 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
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
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- 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
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2463/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
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- 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
- C08J2471/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
- C08J2471/02—Polyalkylene oxides
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- 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
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
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Abstract
The invention discloses low-thermal conductivity XPE foam and a preparation method thereof, and relates to the technical field of foam, wherein the low-thermal conductivity XPE foam comprises, by weight, 32-45 parts of low-density polyethylene, 18-30 parts of polyether polyol, 22-35 parts of epoxy resin, 5-10 parts of a foaming agent, 15-22 parts of a cross-linking agent, 16-24 parts of an antioxidant, 13-18 parts of silicone oil, 10-15 parts of a flame retardant, 5-10 parts of a plasticizer, 10-15 parts of water, 15-22 parts of color master batch and 10-15 parts of a foam homogenizing agent. The XPE foam with the low thermal conductivity coefficient has uniform internal foam holes, high foaming rate and high thermal conductivity coefficient, is beneficial to control and production, reduces the production cost, adopts the polyether polyol with bio-oil and the low-density polyethylene for crosslinking, simultaneously, the epoxy resin can react the residual ethanolamine in the polyether polyol with bio-oil, further reduces the residues, has higher degradability and is beneficial to environmental protection.
Description
Technical Field
The invention relates to the technical field of foam, in particular to low-thermal conductivity XPE foam and a preparation method thereof.
Background
The foam is a material foamed by plastic particles, and is called foam for short. The foam is divided into PU foam, antistatic foam, conductive foam and the like, the foam has a series of characteristics of elasticity, light weight, quick pressure-sensitive fixation, convenient use, free bending, ultrathin volume, reliable performance and the like, the conductive foam wraps the conductive cloth on the ultrawhite sponge, and after a series of treatments, the conductive foam has good surface conductivity and can be easily fixed on a device to be shielded by an adhesive tape;
in the prior art, most common foam products are soft in texture, uneven in internal foam pores, low in foaming rate, low in heat conductivity coefficient, high in control difficulty, high in production cost, difficult to form and the like, and meanwhile, the existing foam is poor in degradability and heavy in environmental pollution; therefore, the XPE foam with the low heat conductivity coefficient and the preparation method thereof are provided.
Disclosure of Invention
The invention mainly aims to provide XPE foam with low heat conductivity coefficient and a preparation method thereof, and aims to solve the problems in the background art.
In order to achieve the purpose, the invention adopts the technical scheme that: the XPE foam with the low thermal conductivity coefficient comprises, by weight, 32-45 parts of low-density polyethylene, 18-30 parts of bio-oil polyether polyol, 22-35 parts of epoxy resin, 5-10 parts of a foaming agent, 15-22 parts of a cross-linking agent, 16-24 parts of an antioxidant, 13-18 parts of silicone oil, 10-15 parts of a flame retardant, 5-10 parts of a plasticizer, 10-15 parts of water, 15-22 parts of color master batch and 10-15 parts of a foam stabilizer.
The XPE foam with the low thermal conductivity coefficient comprises, by weight, 35-38 parts of low-density polyethylene, 22-24 parts of polyether polyol with bio-oil, 23-25 parts of epoxy resin, 7-8 parts of a foaming agent, 17-19 parts of a cross-linking agent, 18-20 parts of an antioxidant, 15-17 parts of silicone oil, 12-13 parts of a flame retardant, 7-8 parts of a plasticizer, 12-13 parts of water, 17-19 parts of color master batches and 12-13 parts of a foam homogenizing agent.
The polyether polyol of the biological oil mainly comprises a polyol initiator formed by transesterification of the biological oil and ethanolamine, and the polyol initiator and propylene oxide are subjected to alkoxylation ring-opening polymerization to obtain the polyether polyol.
The foaming agent is selected from azodicarbonamide, and the crosslinking agent is selected from dicumyl peroxide.
The foam stabilizer is an organic silicon foam stabilizer, and the antioxidant is selected from pentaerythritol ester.
The main structural characteristics of the plasticizer comprise a long-block polyoctene chain segment synthesized by catalysis of a novel metallocene catalyst or paraffin oil.
A preparation method of XPE foam with low thermal conductivity coefficient comprises the following steps:
step S1: adding low-density polyethylene, bio-oil polyether polyol and epoxy resin into a screw extruder at 100 ℃ for banburying granulation to obtain master batches;
step S2: adding a foaming agent, a cross-linking agent and an antioxidant into the master batch, and carrying out secondary banburying granulation at 105 ℃ to obtain a mixed master batch;
step S3: adding the mixed master batch into a stirrer, and respectively adding silicone oil, a flame retardant, a plasticizer, water and the master batch to stir for 10-20 min;
step S4: extruding the uniformly stirred mixed master batch by a single-screw extruder, and adding a foam stabilizer;
step S5: and then, carrying out foaming production on the extruded master batch in a gas type horizontal foaming furnace.
The gas-fired horizontal foaming furnace in the step S5 comprises a preheating section and a foaming section, wherein the temperature of the preheating section is 130-135 ℃, and the temperature of the foaming section is 230-235 ℃.
In the step S4, five heating zones are sequentially arranged from the feed inlet to the die of the machine barrel of the single-screw extruder, and the temperatures of the zones are 115 ℃, 117 ℃, 125 ℃ and 125 ℃ in sequence.
The invention has the following beneficial effects:
the low-thermal conductivity XPE foam has uniform inner foam holes, high foaming rate and high thermal conductivity, is beneficial to control and production, reduces the production cost, adopts the bio-oil polyether polyol and low-density polyethylene for crosslinking, simultaneously, the epoxy resin can enable the residual ethanolamine in the bio-oil polyether polyol to react, further reduces the residues, has higher degradability and is beneficial to environmental protection.
The low-density polyethylene added into the low-thermal conductivity XPE foam has high melting point and high hardness, and the hardness of the foam is increased after the low-density polyethylene is added, so that the requirements of customers on different hardness are met.
The preparation method of the low-thermal conductivity XPE foam is simple and convenient to operate, the preparation efficiency of the foam material is high, the preparation cost is low, the processing and using controllability is strong, and the adaptability is strong.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
FIG. 1 is a flow chart of a preparation method of the low thermal conductivity XPE foam of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The XPE foam with the low thermal conductivity coefficient comprises, by weight, 32-45 parts of low-density polyethylene, 18-30 parts of bio-oil polyether polyol, 22-35 parts of epoxy resin, 5-10 parts of a foaming agent, 15-22 parts of a cross-linking agent, 16-24 parts of an antioxidant, 13-18 parts of silicone oil, 10-15 parts of a flame retardant, 5-10 parts of a plasticizer, 10-15 parts of water, 15-22 parts of color master batches and 10-15 parts of a foam homogenizing agent.
The flame-retardant polyethylene foam material comprises, by weight, 35-38 parts of low-density polyethylene, 22-24 parts of polyether polyol, 23-25 parts of epoxy resin, 7-8 parts of a foaming agent, 17-19 parts of a cross-linking agent, 18-20 parts of an antioxidant, 15-17 parts of silicone oil, 12-13 parts of a flame retardant, 7-8 parts of a plasticizer, 12-13 parts of water, 17-19 parts of color master batches and 12-13 parts of a foam stabilizer.
The foaming agent is selected from azodicarbonamide, and the crosslinking agent is selected from dicumyl peroxide; the foam stabilizer is an organic silicon foam stabilizer, and the antioxidant is selected from pentaerythritol ester.
The main structural characteristics of the plasticizer comprise a long-block polyoctene chain segment synthesized by catalysis of a novel metallocene catalyst or paraffin oil.
The polyether polyol of the biological oil mainly comprises a polyol initiator formed by transesterification of the biological oil and ethanolamine, and is prepared by alkoxylation ring-opening polymerization of the polyol initiator and propylene oxide.
Example 2
A preparation method of XPE foam with low thermal conductivity coefficient comprises the following steps:
step S1: adding low-density polyethylene, bio-oil polyether polyol and epoxy resin into a screw extruder at 100 ℃ for banburying granulation to obtain master batches;
step S2: adding a foaming agent, a cross-linking agent and an antioxidant into the master batch, and carrying out secondary banburying granulation at 105 ℃ to obtain a mixed master batch;
step S3: adding the mixed master batch into a stirrer, and respectively adding silicone oil, a flame retardant, a plasticizer, water and the master batch to stir for 10-20 min;
step S4: extruding the uniformly stirred mixed master batch by a single-screw extruder, and adding a foam stabilizer;
step S5: and then, carrying out foaming production on the extruded master batch in a gas type horizontal foaming furnace.
Example 3
Aiming at the detection of the using effect of the low-thermal conductivity XPE foam prepared by the method, the low-thermal conductivity XPE foam prepared by the method preferably comprises, by weight, 35-38 parts of low-density polyethylene, 22-24 parts of bio-oil polyether polyol, 23-25 parts of epoxy resin, 7-8 parts of a foaming agent, 17-19 parts of a cross-linking agent, 18-20 parts of an antioxidant, 15-17 parts of silicone oil, 12-13 parts of a flame retardant, 7-8 parts of a plasticizer, 12-13 parts of water, 17-19 parts of color master batch and 12-13 parts of a foam homogenizing agent;
the commercially available foam is randomly taken for use and comparison with the low-thermal-conductivity-coefficient XPE foam, A, B, C and D four control groups are set, wherein A, B, C group is the commercially available foam, D group is the low-thermal-conductivity-coefficient XPE foam, the detection standards are the flame retardance (GB8624-97 standard), the thermal conductivity and the degradability of each foam under the same use environment and state, and the test conditions are shown in the following table.
Table one is the use test comparison of 4 groups of foam:
as can be seen from the table I, the foam prepared by the method has good comprehensive use effect, balanced flame retardance, heat conductivity coefficient and degradability, obvious use advantages compared with the commercially available foam, and higher popularization value.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (9)
1. The XPE foam with the low thermal conductivity coefficient is characterized by comprising, by weight, 32-45 parts of low-density polyethylene, 18-30 parts of bio-oil polyether polyol, 22-35 parts of epoxy resin, 5-10 parts of a foaming agent, 15-22 parts of a cross-linking agent, 16-24 parts of an antioxidant, 13-18 parts of silicone oil, 10-15 parts of a flame retardant, 5-10 parts of a plasticizer, 10-15 parts of water, 15-22 parts of color master batch and 10-15 parts of a foam stabilizer.
2. The XPE foam with the low thermal conductivity coefficient as claimed in claim 1, wherein the XPE foam with the low thermal conductivity coefficient comprises, by weight, 35-38 parts of low-density polyethylene, 22-24 parts of bio-oil polyether polyol, 23-25 parts of epoxy resin, 7-8 parts of a foaming agent, 17-19 parts of a cross-linking agent, 18-20 parts of an antioxidant, 15-17 parts of silicone oil, 12-13 parts of a flame retardant, 7-8 parts of a plasticizer, 12-13 parts of water, 17-19 parts of a color master batch and 12-13 parts of a foam stabilizer.
3. The XPE foam of claim 2, wherein the polybio-oil polyether polyol mainly comprises a polyol initiator formed by transesterification of polybio-oil with ethanolamine, and the polyol initiator is prepared by alkoxylation ring-opening polymerization with propylene oxide.
4. The low thermal conductivity XPE foam of claim 2, wherein the blowing agent is selected from azodicarbonamide and the cross-linking agent is selected from dicumyl peroxide.
5. The XPE foam with the low thermal conductivity coefficient as set forth in claim 2, wherein the foam stabilizer is an organosilicon foam stabilizer, and the antioxidant is selected from pentaerythritol ester.
6. The XPE foam with low thermal conductivity according to claim 2, wherein the main structural characteristics of the plasticizer comprise long-block polyoctene chain segments synthesized by catalysis of a novel metallocene catalyst or paraffin oil.
7. A preparation method of XPE foam with low thermal conductivity is characterized by comprising the following steps:
step S1: adding low-density polyethylene, bio-oil polyether polyol and epoxy resin into a screw extruder at 100 ℃ for banburying granulation to obtain master batches;
step S2: adding a foaming agent, a cross-linking agent and an antioxidant into the master batch, and carrying out secondary banburying granulation at 105 ℃ to obtain a mixed master batch;
step S3: adding the mixed master batch into a stirrer, and respectively adding silicone oil, a flame retardant, a plasticizer, water and the master batch to stir for 10-20 min;
step S4: extruding the uniformly stirred mixed master batch by a single-screw extruder, and adding a foam stabilizer;
step S5: and then, carrying out foaming production on the extruded master batch in a gas type horizontal foaming furnace.
8. The method as claimed in claim 7, wherein the gas-fired horizontal foaming furnace in step S5 comprises a preheating section and a foaming section, the temperature of the preheating section is 130-135 ℃, and the temperature of the foaming section is 230-235 ℃.
9. The method for preparing XPE foam with low thermal conductivity according to claim 7, wherein in step S4, the cylinder of the single screw extruder is provided with five heating zones in the sequence from the feed inlet to the die, and the temperatures of the zones are 115 ℃, 117 ℃, 125 ℃ and 125 ℃.
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| CN202210176082.XA CN114561056A (en) | 2022-02-25 | 2022-02-25 | Low-thermal conductivity XPE foam and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115232460A (en) * | 2022-08-29 | 2022-10-25 | 启明星精密科技(惠州)有限公司 | Method for manufacturing environment-friendly foam |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102516623A (en) * | 2011-11-30 | 2012-06-27 | 深圳市长园特发科技有限公司 | High-temperature-resistant chemical crosslink polyethylene foam and preparation method thereof |
| CN108530839A (en) * | 2018-04-23 | 2018-09-14 | 苏州普诺兹电子有限公司 | Environment friendly foam cotton material with heat-conductive characteristic and preparation method thereof |
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- 2022-02-25 CN CN202210176082.XA patent/CN114561056A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102516623A (en) * | 2011-11-30 | 2012-06-27 | 深圳市长园特发科技有限公司 | High-temperature-resistant chemical crosslink polyethylene foam and preparation method thereof |
| CN108530839A (en) * | 2018-04-23 | 2018-09-14 | 苏州普诺兹电子有限公司 | Environment friendly foam cotton material with heat-conductive characteristic and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115232460A (en) * | 2022-08-29 | 2022-10-25 | 启明星精密科技(惠州)有限公司 | Method for manufacturing environment-friendly foam |
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