CN112646384A - Waste plastic particle modified flame-retardant sheet and preparation method thereof - Google Patents
Waste plastic particle modified flame-retardant sheet and preparation method thereof Download PDFInfo
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- CN112646384A CN112646384A CN202011512425.2A CN202011512425A CN112646384A CN 112646384 A CN112646384 A CN 112646384A CN 202011512425 A CN202011512425 A CN 202011512425A CN 112646384 A CN112646384 A CN 112646384A
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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
- C08J9/08—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
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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
- C08J9/0014—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
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
-
- 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
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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
- C08J9/0085—Use of fibrous compounding ingredients
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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
- C08J2203/02—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
- C08J2397/00—Characterised by the use of lignin-containing materials
- C08J2397/02—Lignocellulosic material, e.g. wood, straw or bagasse
-
- 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
- C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2427/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2427/06—Homopolymers or copolymers of vinyl chloride
Abstract
The invention discloses a waste plastic particle modified flame-retardant plate and a preparation method thereof, and relates to the technical field of plastic plates, wherein the waste plastic particle modified flame-retardant plate is prepared from the following raw materials in parts by weight: 50-80 parts of wood powder, 50-80 parts of fiber modified waste PVC particles, 10-30 parts of fly ash, 5-20 parts of flame retardant, 1-10 parts of talcum powder and 1-10 parts of foaming agent; according to the invention, the waste PVC plastic and wood powder are used as raw materials, and the fiber modified waste PVC particles are prepared by modifying the waste PVC plastic, so that the flame retardant property and the mechanical strength of the board can be enhanced, the heat resistance of PVC can be improved, the processing and forming temperature of the board can be increased, and the wood-plastic composite board with uniform components and excellent comprehensive use performance is prepared.
Description
The technical field is as follows:
the invention relates to the technical field of plastic plates, in particular to a waste plastic particle modified flame-retardant plate and a preparation method thereof.
Background art:
waste plastics are a general term for plastics which are used in life, industry and other purposes and are finally eliminated or replaced, and many waste plastics can be degraded after many years, so that the environment is seriously polluted by improper treatment of the waste plastics. In order to solve the problem, people recycle and reprocess the waste plastics to prepare various plastic products and ensure the application performance of the plastic products.
The flame-retardant board is also called a flame-retardant board, and is an artificial board manufactured by adding a flame retardant into a board production line in the production process of the artificial board, such as a flame-retardant density board, a flame-retardant plywood and the like. The flame-retardant board is usually made of wood, but the wood is flammable, so a flame retardant is required to be added when the flame-retardant board is prepared, but the addition amount of the flame retardant is limited. Although the flame retardant property of the prepared plate can be ensured by adding excessive flame retardant, the physical property of the prepared plate can be influenced, the added flame retardant also needs to ensure the environmental protection, otherwise, potential safety hazards exist.
The invention content is as follows:
the invention aims to solve the technical problem of providing a waste plastic particle modified flame-retardant plate and a preparation method thereof, and the mechanical strength, the flame retardance and the heat resistance of PVC (polyvinyl chloride) of the plate are improved by adding the fiber modified waste PVC particles, so that the comprehensive application effect of the plate is optimized.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
the waste plastic particle modified flame-retardant sheet material is prepared from the following raw materials in parts by weight:
50-80 parts of wood powder, 50-80 parts of fiber modified waste PVC particles, 10-30 parts of fly ash, 5-20 parts of flame retardant, 1-10 parts of talcum powder and 1-10 parts of foaming agent;
the preparation method of the fiber modified waste PVC particles comprises the following steps: adding the waste PVC particles and asbestos wool into a double-screw extruder, carrying out melting reaction, and carrying out extrusion granulation to obtain the fiber modified waste PVC particles.
The mass ratio of the waste PVC particles to the asbestos wool is 30-80: 5-30.
The processing temperature of the double-screw extruder is 130-160 ℃, and the screw rotating speed is 50-100 r/min.
The asbestos wool is heat-resistant and fire-resistant, the plate product added with the asbestos wool has fire resistance and can play a role in reinforcement, but the asbestos wool is easy to agglomerate when being blended with wood powder to influence the flame-retardant effect. Aiming at the problem, the invention combines the structural characteristic that the surface of the asbestos wool contains hydroxyl, uses a double-screw extruder as a reactor, carries out melting reaction on waste PVC particles and the asbestos wool, realizes chemical compounding of the asbestos wool and PVC through ether bond, not only can improve the flame retardance and mechanical strength of the plate, but also can enhance the heat resistance of the PVC, solve the problem that the PVC is easy to decompose, and improve the extrusion processing temperature of the plate.
The flame retardant is resorcinol bis (diphenyl phosphate).
The flame retardant is added to optimize the flame retardant performance of the plate, belongs to an environment-friendly halogen-free flame retardant, is high in flame retardant efficiency, has double functions of flame retardance and plasticization, enhances the application safety of the plate, and simultaneously improves the flow processing performance in waste plastic forming.
The talcum powder is nano talcum powder, and the average particle size is less than 100 nm.
In the invention, the nano talcum powder is used as a release agent to ensure the separation of the formed plate, and plays a role in reinforcing to improve the physical property of the plate.
The foaming agent consists of an inorganic foaming agent and an organic foaming agent, and the mass ratio of the inorganic foaming agent to the organic foaming agent is 1-10: 1-10.
The inorganic foaming agent is at least one of ammonium bicarbonate and hydrogen peroxide.
The organic foaming agent is at least one of lauryl sodium sulfate, fatty alcohol-polyoxyethylene ether sodium sulfate and rosin soap foaming agents.
According to the invention, the porous plate is prepared by adding the foaming agent, so that the sound insulation and heat preservation performance of the plate can be enhanced, and the application effect of the plate as a decoration material is enhanced.
The preparation method of the waste plastic particle modified flame-retardant plate comprises the steps of adding wood powder, fiber modified waste PVC particles, fly ash, a flame retardant, talcum powder and a foaming agent into a mixer according to the weight ratio, uniformly mixing, heating and plasticizing through a double-screw extruder, extruding into a preheated plate type mold, cooling and shaping, and cutting to obtain the flame-retardant plate.
The processing temperature of the double-screw extruder is 160-200 ℃, and the screw rotating speed is 100-400 r/min.
The preheating temperature of the plate type mold is 100-130 ℃.
The technical scheme takes resorcinol bis (diphenyl phosphate) as a flame retardant, although the environment-friendly performance is good, the flame retardant effect is limited, and in order to further enhance the flame retardant performance of the board under the condition of the same addition amount, the invention also provides a novel flame retardant, which has the following specific structure and preparation method:
the structural formula of the flame retardant is as follows:
the preparation method of the flame retardant comprises the following steps: dissolving 2,2 '-bipyridine-4, 4' -diethyl dimethylphosphate and tetraisopropyl titanate in xylene to obtain a solution A, dissolving imidazo [1,2-a ] pyridine-8-alcohol in xylene to obtain a solution B, dropwise adding the solution B into the solution A under the protection of nitrogen, heating for reaction, continuously distilling off generated ethanol in the reaction process, adding water for extraction after the reaction is finished, collecting an organic phase, and distilling and recovering the xylene to obtain the flame retardant.
The molar ratio of the 2,2 '-bipyridyl-4, 4' -diethyl dimethylphosphate to the imidazo [1,2-a ] pyridine-8-ol is 1: 4.
In the reaction, tetraisopropyl titanate is used as a catalyst to successfully prepare the novel flame retardant with the structure.
The dosage of the tetraisopropyl titanate is 0.01 to 0.03 time of the total mass of the 2,2 '-bipyridyl-4, 4' -diethyl dimethylphosphate and the imidazo [1,2-a ] pyridine-8-alcohol.
The novel flame retardant prepared by the method is prepared from 2,2 '-dipyridyl-4, 4' -diethyl dimethylphosphate and imidazo [1,2-a ] pyridine-8-ol, the application of the two substances in preparing the flame retardant is not disclosed in the prior art and the common general knowledge in the field, the oxygen index of the novel flame retardant can reach more than 36 percent under the condition of the same addition amount compared with the traditional flame retardant resorcinol bis (diphenyl phosphate) in the field, and the novel flame retardant also belongs to an environment-friendly flame retardant and belongs to a novel phosphorus-nitrogen flame retardant.
The invention has the beneficial effects that: according to the invention, the waste PVC plastic and wood powder are used as raw materials, and the fiber modified waste PVC particles are prepared by modifying the waste PVC plastic, so that the flame retardant property and the mechanical strength of the board can be enhanced, the heat resistance of PVC can be improved, the processing and forming temperature of the board can be increased, and the wood-plastic composite board with uniform components and excellent comprehensive use performance is prepared.
The specific implementation mode is as follows:
in order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
The fiber-modified waste PVC particles of the examples and comparative examples were prepared by the following steps:
adding 68 parts of waste PVC particles and 22 parts of asbestos wool into a double-screw extruder, and performing melt reaction at the following temperatures from a feeding section to a machine head in sequence: collecting hydrogen chloride gas generated by the reaction at 130 ℃, 140 ℃, 150 ℃, 160 ℃, 150 ℃ and the rotating speed of a screw rod of 80r/min, and extruding and granulating to obtain the fiber modified waste PVC particles.
The novel flame retardant of example 3 was prepared from the following steps:
dissolving 0.03mol of diethyl 2,2 '-bipyridine-4, 4' -dimethylphosphate and tetraisopropyl titanate in xylene to obtain solution A, and dissolving 0.12mol of imidazo [1,2-a ] in the solution A]Dissolving pyridine-8-alcohol in xylene to obtain solution B, wherein the amount of tetraisopropyl titanate is 2,2 '-bipyridine-4, 4' -diethyl dimethylphosphate and imidazo [1,2-a ]]0.01 time of the total mass of pyridine-8-alcohol, dropwise adding the solution B into the solution A under the protection of nitrogen, heating to 120 ℃ for reaction, continuously distilling off the generated ethanol in the reaction process, adding water for extraction after the reaction is finished when no ethanol is generated, collecting an organic phase, and distilling and recovering xylene to obtain a product.1H NMR(DMSO-d6,400MHz),δ:8.81(s,2H),8.41(d,2H),8.23(d,4H),7.48(s,8H),7.19(d,2H),62-6.86(m,8H),3.81(d,4H)；ESI-MS:m/z＝809.18[M+1]+.
Example 1
Adding 65 parts of wood powder, 55 parts of fiber modified waste PVC particles, 10 parts of fly ash, 12 parts of resorcinol bis (diphenyl phosphate), 6 parts of nano talcum powder, 5 parts of ammonium bicarbonate and 4 parts of sodium dodecyl sulfate into a mixer, uniformly mixing, heating and plasticizing by a double-screw extruder, wherein the temperature from a feeding section to a machine head is as follows in sequence: extruding the mixture into a plate mold preheated to 120 ℃ at the screw rotation speed of 200r/min at the temperature of 160 ℃, 170 ℃, 180 ℃, 190 ℃, 200 ℃, 190 ℃ to obtain the flame-retardant plate.
Example 2
Adding 70 parts of wood powder, 60 parts of fiber modified waste PVC particles, 10 parts of fly ash, 12 parts of resorcinol bis (diphenyl phosphate), 5 parts of nano talcum powder, 5 parts of ammonium bicarbonate and 4 parts of sodium dodecyl sulfate into a mixer, uniformly mixing, heating and plasticizing by a double-screw extruder, wherein the temperature from a feeding section to a machine head is as follows in sequence: extruding the mixture into a plate mold preheated to 120 ℃ at the screw rotation speed of 200r/min at the temperature of 160 ℃, 170 ℃, 180 ℃, 190 ℃, 200 ℃, 190 ℃ to obtain the flame-retardant plate.
Example 3
Example 3 was obtained by replacing the flame retardant of example 2 with an equal mass of the novel flame retardant prepared above.
Comparative example 1
The fiber modified waste PVC particles in the embodiment 2 are replaced by waste PVC particles and asbestos wool with equal mass, namely, the waste PVC particles and the asbestos wool with equal proportion are directly added into the wood powder.
Comparative example 2
Comparative example 2 was obtained by replacing the flame retardant in example 2 with an equal mass of diethyl 2,2 '-bipyridine-4, 4' -dimethylphosphate.
The flexural strength of the panels was tested using the standard ASTM D790-2017.
The impact strength of the panels was tested using standard ASTM D256-2010.
The oxygen index of the panels was tested using standard GB/T2406.2-2009.
The results of the performance tests are shown in Table 1.
TABLE 1
| Bending strength MPa | Impact strength KJ/m2 | Oxygen index% | |
| Example 1 | 55.2 | 16.2 | 33.5 |
| Example 2 | 56.8 | 17.6 | 34.2 |
| Example 3 | 58.3 | 18.5 | 36.4 |
| Comparative example 1 | 49.5 | 12.3 | 30.3 |
| Comparative example 2 | 52.4 | 14.7 | 25.6 |
As can be seen from table 1, in the embodiment, the preparation and application of the fiber modified waste PVC particles can simultaneously improve the mechanical strength and the flame retardant property of the sheet, and the preparation and application of the novel flame retardant can make the sheet obtain a better flame retardant property.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The waste plastic particle modified flame-retardant sheet is characterized by being prepared from the following raw materials in parts by weight: 50-80 parts of wood powder, 50-80 parts of fiber modified waste PVC particles, 10-30 parts of fly ash, 5-20 parts of flame retardant, 1-10 parts of talcum powder and 1-10 parts of foaming agent;
the preparation method of the fiber modified waste PVC particles comprises the following steps: adding the waste PVC particles and asbestos wool into a double-screw extruder, carrying out melting reaction, and carrying out extrusion granulation to obtain the fiber modified waste PVC particles.
2. The waste plastic particle modified flame-retardant sheet material as claimed in claim 1, wherein: the mass ratio of the waste PVC particles to the asbestos wool is 30-80: 5-30.
3. The waste plastic particle modified flame-retardant sheet material as claimed in claim 1, wherein: the processing temperature of the double-screw extruder is 130-160 ℃, and the screw rotating speed is 50-100 r/min.
4. The waste plastic particle modified flame-retardant sheet material as claimed in claim 1, wherein: the flame retardant is resorcinol bis (diphenyl phosphate).
5. The waste plastic particle modified flame-retardant sheet material as claimed in claim 1, wherein: the talcum powder is nano talcum powder, and the average particle size is less than 100 nm.
6. The waste plastic particle modified flame-retardant sheet material as claimed in claim 1, wherein: the foaming agent consists of an inorganic foaming agent and an organic foaming agent, and the mass ratio of the inorganic foaming agent to the organic foaming agent is 1-10: 1-10.
7. The waste plastic particle modified flame-retardant sheet material as claimed in claim 6, wherein: the inorganic foaming agent is at least one of ammonium bicarbonate and hydrogen peroxide; the organic foaming agent is at least one of lauryl sodium sulfate, fatty alcohol-polyoxyethylene ether sodium sulfate and rosin soap foaming agents.
8. The method for preparing the waste plastic particle modified flame-retardant sheet material as claimed in any one of claims 1 to 7, wherein the method comprises the following steps: adding wood powder, fiber modified waste PVC particles, fly ash, a flame retardant, talcum powder and a foaming agent into a mixer according to the weight ratio, uniformly mixing, heating and plasticizing through a double-screw extruder, extruding into a preheated plate type die, cooling and sizing, and cutting to obtain the flame-retardant plate.
9. The method for preparing the waste plastic particle modified flame-retardant plate as claimed in claim 8, wherein the method comprises the following steps: the processing temperature of the double-screw extruder is 160-200 ℃, and the screw rotating speed is 100-400 r/min.
10. The method for preparing the waste plastic particle modified flame-retardant plate as claimed in claim 8, wherein the method comprises the following steps: the preheating temperature of the plate type mold is 100-130 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011512425.2A CN112646384A (en) | 2020-12-19 | 2020-12-19 | Waste plastic particle modified flame-retardant sheet and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011512425.2A CN112646384A (en) | 2020-12-19 | 2020-12-19 | Waste plastic particle modified flame-retardant sheet and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108102255A (en) * | 2018-01-08 | 2018-06-01 | 安徽以诺木塑板材科技有限公司 | A kind of flame retardant type PVC wood plastic plate and preparation method thereof |
| CN108424592A (en) * | 2018-04-04 | 2018-08-21 | 桂林全州燎原科技有限责任公司 | PVC foam wood/plastic building template and preparation method |
| CN108503977A (en) * | 2018-04-04 | 2018-09-07 | 佛山市上利丰装饰材料有限公司 | A kind of high-strength composite plastic-wood material |
| CN110003677A (en) * | 2019-04-24 | 2019-07-12 | 安徽大学 | A kind of halogen-free polypropylene flame redardant wood plastic composite and preparation method thereof |
| CN110577752A (en) * | 2019-09-27 | 2019-12-17 | 安徽可尔海思塑业有限公司 | high-strength wood-plastic plate and preparation method thereof |
-
2020
- 2020-12-19 CN CN202011512425.2A patent/CN112646384A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108102255A (en) * | 2018-01-08 | 2018-06-01 | 安徽以诺木塑板材科技有限公司 | A kind of flame retardant type PVC wood plastic plate and preparation method thereof |
| CN108424592A (en) * | 2018-04-04 | 2018-08-21 | 桂林全州燎原科技有限责任公司 | PVC foam wood/plastic building template and preparation method |
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| CN110003677A (en) * | 2019-04-24 | 2019-07-12 | 安徽大学 | A kind of halogen-free polypropylene flame redardant wood plastic composite and preparation method thereof |
| CN110577752A (en) * | 2019-09-27 | 2019-12-17 | 安徽可尔海思塑业有限公司 | high-strength wood-plastic plate and preparation method thereof |
Non-Patent Citations (1)
| Title |
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| 杨忠久主编: "《硬质塑木复合低发泡产品生产技术和基础知识》", 30 November 2018, 江西科学技术出版社 * |
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Application publication date: 20210413 |