CN114163709B - Production process of co-extrusion halogen-free high-flame-retardance plastic-wood floor - Google Patents
Production process of co-extrusion halogen-free high-flame-retardance plastic-wood floor Download PDFInfo
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- 239000002023 wood Substances 0.000 title claims abstract description 111
- 238000001125 extrusion Methods 0.000 title claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 68
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical class [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims abstract description 57
- 239000003063 flame retardant Substances 0.000 claims abstract description 43
- 239000000843 powder Substances 0.000 claims abstract description 42
- 238000003756 stirring Methods 0.000 claims abstract description 35
- -1 polyethylene Polymers 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 15
- 239000000314 lubricant Substances 0.000 claims abstract description 14
- 239000004698 Polyethylene Substances 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 229920000573 polyethylene Polymers 0.000 claims abstract description 11
- 229920001971 elastomer Polymers 0.000 claims abstract description 10
- 239000000806 elastomer Substances 0.000 claims abstract description 10
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 230000032683 aging Effects 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 45
- 229960001545 hydrotalcite Drugs 0.000 claims description 29
- 229910001701 hydrotalcite Inorganic materials 0.000 claims description 29
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 28
- 238000006243 chemical reaction Methods 0.000 claims description 28
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 27
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 24
- 235000013312 flour Nutrition 0.000 claims description 20
- 239000008367 deionised water Substances 0.000 claims description 17
- 229910021641 deionized water Inorganic materials 0.000 claims description 17
- 238000001035 drying Methods 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 17
- 238000005406 washing Methods 0.000 claims description 17
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 15
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 claims description 15
- 229920003023 plastic Polymers 0.000 claims description 14
- 239000004033 plastic Substances 0.000 claims description 14
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 12
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 12
- 239000001569 carbon dioxide Substances 0.000 claims description 12
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 11
- 239000012046 mixed solvent Substances 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 8
- 238000002390 rotary evaporation Methods 0.000 claims description 8
- LCPUCXXYIYXLJY-UHFFFAOYSA-N 1,1,2,4,4,4-hexafluorobutyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC(F)(F)C(F)CC(F)(F)F LCPUCXXYIYXLJY-UHFFFAOYSA-N 0.000 claims description 7
- QABCGOSYZHCPGN-UHFFFAOYSA-N chloro(dimethyl)silicon Chemical compound C[Si](C)Cl QABCGOSYZHCPGN-UHFFFAOYSA-N 0.000 claims description 7
- 238000010992 reflux Methods 0.000 claims description 7
- MHABMANUFPZXEB-UHFFFAOYSA-N O-demethyl-aloesaponarin I Natural products O=C1C2=CC=CC(O)=C2C(=O)C2=C1C=C(O)C(C(O)=O)=C2C MHABMANUFPZXEB-UHFFFAOYSA-N 0.000 claims description 6
- 239000012065 filter cake Substances 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 239000002244 precipitate Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 150000003613 toluenes Chemical class 0.000 claims description 4
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 229910001415 sodium ion Inorganic materials 0.000 claims description 2
- 230000003179 granulation Effects 0.000 abstract description 5
- 238000005469 granulation Methods 0.000 abstract description 5
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 21
- 229920000642 polymer Polymers 0.000 description 9
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 8
- 230000003712 anti-aging effect Effects 0.000 description 8
- 229910052731 fluorine Inorganic materials 0.000 description 8
- 239000011737 fluorine Substances 0.000 description 8
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 239000000835 fiber Substances 0.000 description 7
- 239000000779 smoke Substances 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical group CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- LJUXFZKADKLISH-UHFFFAOYSA-N benzo[f]phosphinoline Chemical group C1=CC=C2C3=CC=CC=C3C=CC2=P1 LJUXFZKADKLISH-UHFFFAOYSA-N 0.000 description 4
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 4
- 239000004611 light stabiliser Substances 0.000 description 4
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 4
- 239000007795 chemical reaction product Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 125000003700 epoxy group Chemical group 0.000 description 3
- 239000012796 inorganic flame retardant Substances 0.000 description 3
- 238000003760 magnetic stirring Methods 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 2
- 229920001038 ethylene copolymer Polymers 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 238000009408 flooring Methods 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 235000019359 magnesium stearate Nutrition 0.000 description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- 238000000967 suction filtration Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000006845 Michael addition reaction Methods 0.000 description 1
- 229920001587 Wood-plastic composite Polymers 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- DWSWCPPGLRSPIT-UHFFFAOYSA-N benzo[c][2,1]benzoxaphosphinin-6-ium 6-oxide Chemical compound C1=CC=C2[P+](=O)OC3=CC=CC=C3C2=C1 DWSWCPPGLRSPIT-UHFFFAOYSA-N 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000006266 etherification reaction Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 239000011155 wood-plastic composite Substances 0.000 description 1
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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H8/00—Macromolecular compounds derived from lignocellulosic materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2497/00—Characterised by the use of lignin-containing materials
- C08J2497/02—Lignocellulosic material, e.g. wood, straw or bagasse
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
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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)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a production process of a co-extrusion halogen-free high flame retardant plastic-wood floor, which belongs to the technical field of floor boards and comprises the following steps: stirring polyethylene, TPE elastomer, modified wood powder and compatilizer at 85-95 ℃ under vacuum for 10-20min, adding modified hydrotalcite, lubricant and aging resistant agent, stirring at 100-105 ℃ under vacuum for 20-30min, and discharging to obtain a mixture; step two, co-extrusion: and cooling the mixture to 40 ℃, adding a double screw for extrusion granulation, and transferring to an extruder for extrusion molding to obtain the co-extrusion halogen-free high flame retardant plastic-wood floor. The invention introduces the modified wood powder and the modified hydrotalcite, solves the problem of reduced toughness of the floor caused by the introduction of the flame retardant, and improves the flame retardant property and toughness of the plastic-wood floor.
Description
Technical Field
The invention belongs to the technical field of floor boards, and particularly relates to a production process of a co-extrusion halogen-free high-flame-retardance plastic-wood floor.
Background
The plastic-wood (same as "wood-plastic") is a new type environment-protecting composite material, it utilizes various kinds of abandoned natural wood powder and recovered plastics to make compounding, adds special auxiliary agent, and makes the new type environment-protecting composite material which is similar to wood but has better performance than wood by means of extrusion. The plastic-wood floor has the characteristics of water resistance, moisture resistance, moth resistance, mildew resistance, corrosion resistance, good dimensional stability and the like of processing and paving of natural wood, and is widely applied to various decoration fields.
The plastic-wood floor board applied to flammable and explosive places has high requirements on flame retardant performance, flame retardant (DOPO and DDP) is usually added to the flame retardant of the plastic-wood floor board applied to the market at present, or flame retardant is realized through flame retardant enhancement of polyvinyl chloride, the former is a micromolecule flame retardant, the plastic-wood floor board is easy to migrate in a plastic-wood floor board system, the flame retardant performance is unstable, and the latter is easy to generate smoke during combustion due to halogen, and the environment is harmful. Therefore, research on a plastic-wood floor with halogen-free environment protection and stable flame retardant property is needed.
The halogen-free flame-retardant wood-plastic composite floor disclosed in Chinese patent CN104845394A comprises the following components: the wood powder accounts for 40-60% by mass; 30-45% of polyethylene plastic; 25-35% of compound inorganic flame retardant; 2-7% of auxiliary agent; the mass percentage of the dye is 1-3%. According to the invention, the flame retardant is realized by adding the compound inorganic flame retardant. However, the inorganic flame retardant is not negligible, and is easy to agglomerate in the polymer, difficult to disperse uniformly, and causes the problems of low toughness and low bending resistance of the floor.
Therefore, the invention provides a production process of the co-extrusion halogen-free high-flame-retardance plastic-wood floor, which is used for providing the halogen-free plastic-wood floor with excellent flame retardance.
Disclosure of Invention
The invention aims to provide a production process of a co-extrusion halogen-free high-flame-retardance plastic-wood floor, which is used for solving the problems in the background art.
The aim of the invention can be achieved by the following technical scheme:
a production process of a co-extrusion halogen-free high flame retardant plastic-wood floor comprises the following steps:
step one, preparing raw materials according to the following weight ratio: 25-55 parts of polyethylene, 21-40 parts of modified wood flour, 6-13 parts of TPE elastomer, 1.5-3.5 parts of compatilizer, 1.5-7.5 parts of modified hydrotalcite, 1.5-4.5 parts of lubricant and 1.5-5.5 parts of anti-aging agent;
step two, mixing: adding polyethylene, TPE elastomer, modified wood flour and compatilizer into a high-speed stirrer, stirring for 10-20min at 85-95 ℃ under vacuum, adding modified hydrotalcite, lubricant and aging resisting agent, stirring for 20-30min at 100-105 ℃ under vacuum, and discharging to obtain a mixture;
step three, co-extrusion: and (3) cooling the mixture to 40 ℃, adding the mixture into a double-screw extruder for extrusion granulation, and transferring the mixture into the extruder for extrusion molding to obtain the co-extrusion halogen-free high-flame-retardant plastic-wood floor.
Further, the compatilizer is one of a maleic anhydride grafted ethylene copolymer, an ethylene-vinyl acetate copolymer and an ethylene-acrylic acid copolymer.
Further, the lubricant is one of stearic acid, PE wax, calcium stearate and magnesium stearate.
Further, the anti-aging agent is an antioxidant 1010, an amine-blocking light stabilizer HALS622 and an ultraviolet absorber UV531, and the mass ratio is 1-3:1-3: 1-3.
Further, the modified wood flour is prepared by the following steps:
a1, adding wood powder into a mixed solvent of toluene/ethanol (the volume ratio of toluene to ethanol is 3:1), heating and refluxing for 3 hours, filtering, taking out the wood powder, adding deionized water, preserving heat for 5 hours at 50 ℃, filtering, washing with water, washing with ethanol, and drying to obtain defatted wood powder, wherein the mass ratio of the wood powder to the mixed solvent of toluene/ethanol is 1:8-10, wherein the mass ratio of the wood flour to the deionized water is 1:6-8;
a2, adding a mixed solvent of defatted wood flour and dimethylformamide/water (the volume ratio of the dimethylformamide to the water is 2:1) into a three-neck flask with a stirrer, a condenser tube and a thermometer, regulating the pH value of the solution to 5-6, stirring for 10min, adding a modified flame retardant, heating to 92 ℃, stirring for reacting for 12h, stopping the reaction, cooling to room temperature, adding water, standing for 1-2h, filtering, taking the precipitate, washing with water and ethanol for 2-3 times in sequence, and drying to obtain modified wood flour, wherein the dosage ratio of the mixed solvent of the defatted wood flour, the dimethylformamide/water and the modified flame retardant is 8-12g:100-150mL:40-50g.
In the reaction A2, hydroxyl groups on the surface of the fiber in the wood powder and hydroxyl groups and siloxane in the modified flame retardant are utilized to carry out chemical bond connection (hydroxyl groups and hydroxyl groups carry out etherification reaction, and hydroxyl groups on the surface of the fiber in the wood powder participate in the hydrolysis of siloxane to form silicon-oxygen-fiber links), so that the modified flame retardant is grafted on the surface of the fiber to obtain the modified wood powder, the modified flame retardant contains a phosphaphenanthrene structure, the phosphaphenanthrene structure is introduced, the flame retardance of the wood powder is improved, the silicone chain is introduced, the dispersibility of the modified wood powder in a polymer system is also improved, the wood powder is dispersed more uniformly in the polymer system, the reinforcing effect of the modified wood powder on the polymer strength is promoted, the modified flame retardant is grafted on the surface of the wood powder, the mobility of the modified flame retardant is reduced, and the stability of the flame retardant performance is improved.
Further, the modified flame retardant is prepared by the following steps:
uniformly mixing DOPO-BQ, 3-glycidoxypropyl trimethoxy silane and DMAC, adding potassium hydroxide, heating to 82 ℃, stirring for reaction for 6 hours, stopping the reaction, performing rotary evaporation and rectification to obtain the modified flame retardant, wherein the dosage ratio of DOPO-BQ, 3-glycidoxypropyl trimethoxy silane to DMAC is 0.11-0.12mol:0.2mol:100-250mL.
In the reaction, epoxy groups in 3-glycidoxypropyl trimethoxy silane and hydroxyl groups in DOPO-BQ react to obtain the modified flame retardant, so that a siloxane chain is connected into the DOPO-BQ molecular structure, and the molecular structural formula of the modified flame retardant is shown as follows.
Further, the modified hydrotalcite is prepared by the following steps:
c1, uniformly mixing hexafluorobutyl methacrylate, dimethyl chlorosilane and dehydrated toluene, adding a Karstedt catalyst, stirring at 35 ℃ for reaction for 1.5 hours under the protection of nitrogen, heating and refluxing for reaction for 3 hours, stopping the reaction, cooling to room temperature, and performing reduced pressure rotary evaporation to obtain an intermediate 1, wherein the dosage ratio of the hexafluorobutyl methacrylate, the Karstedt catalyst and the dimethyl chlorosilane is 0.1mol:10mg:0.12-0.15mol, karstedt's catalyst purchased from Hubei Xinkai full chemical Co., ltd;
in the reaction of C1, the Michael addition reaction between the double bond in hexafluorobutyl methacrylate and hydrogen in dimethylchlorosilane is utilized to obtain an intermediate 1, and the molecular structural formula of the intermediate is shown as follows;
c2, mg (N0) 3 ) 2 ·6H 2 0、Al(N0 3 ) 2 ·9H 2 0 and deionized water to prepare a solution A; naOH, na 2 C0 3 Preparing solution B by deionized water; then respectively dripping the solution A and the solution B into a three-mouth bottle filled with deionized water, keeping the pH value between 9 and 10 at normal temperature at 200-300r/min, continuously stirring for 1h after dripping, crystallizing for 18h at 65 ℃, carrying out suction filtration and washing to obtain a filter cake, and drying in a drying oven at 65 ℃ to obtain the magnesium aluminum hydrotalcite, wherein the volume ratio of the solution A to the solution B to the deionized water is 1:1:1-2, wherein the concentration of magnesium ions in the solution A is 0.5mol/L, the concentration of aluminum ions is 0.25mol/L, the concentration of sodium ions in the solution B is 2.15mol/L, and the concentration of hydroxide ions is 2mol/L;
in the C2 reaction, preparing the magnesium aluminum hydrotalcite by using a double-drop coprecipitation method;
adding magnesium aluminum hydrotalcite, 3-glycidoxypropyl trimethoxysilane and an intermediate 1 into a closed container with magnetic stirring, injecting supercritical carbon dioxide, ultrasonically stirring for 12 hours under the pressure of 11MPa, decompressing and removing carbon dioxide after the reaction is finished to obtain a reaction product, repeatedly washing with methanol, and drying in a 60 ℃ oven for 12 hours to obtain modified hydrotalcite, wherein the dosage ratio of the magnesium aluminum hydrotalcite, the 3-glycidoxypropyl trimethoxysilane, the intermediate 1 and the supercritical carbon dioxide is 10-14g:0.5-1g:1.5-2.5g:100mL.
In the C3 reaction, epoxy groups in the interlayer of the magnesium aluminum hydrotalcite and 3-glycidoxypropyl trimethoxy silane are utilized to react with chlorine in the intermediate 1 under the condition of supercritical carbon dioxide, so that siloxane chains and fluorine-containing chains are grafted between the interlayer of the magnesium aluminum hydrotalcite, the oleophylic property of the hydrotalcite is improved, the dispersibility of the modified hydrotalcite in a polymer system is improved, and the water absorption performance of the hydrotalcite is reduced due to the introduction of the fluorine-containing chains (a layer of fluorine-containing chain layer is easily formed around the hydrotalcite by utilizing the characteristic of low surface energy of the fluorine-containing chains, so that the contact between water and the hydrotalcite is avoided, the water absorption performance of the hydrotalcite is further improved, the moisture resistance of the plastic-wood floor is further improved due to the introduction of the hydrotalcite, and the water resistance of the plastic-wood floor is improved to a certain extent; in addition, the modified hydrotalcite has excellent smoke suppression and flame retardance, and the introduction of the modified hydrotalcite and the modified wood powder cooperatively play an excellent flame retardance increasing function, so that the plastic-wood floor has excellent flame retardance.
The invention has the beneficial effects that:
the modified wood powder and the modified hydrotalcite are introduced into the plastic-wood floor, so that the technical problem in the background technology, namely the problem of reduced toughness of the floor caused by the introduction of the flame retardant, is solved, and the flame retardant property (including smoke suppression property) and toughness of the plastic-wood floor are improved, and the principle is explained as follows:
firstly, wood powder contains a large amount of fibers, and the introduction of the wood powder can improve the toughness of the floor; secondly, the introduced wood powder is modified wood powder, the surface of the modified wood powder is provided with a modified flame retardant through a chemical bond chain (hydroxyl groups on the surface of fibers participate in the hydrolysis of siloxane to form silicon-oxygen-fiber links), the modified flame retardant contains a phosphaphenanthrene structure and siloxane, the phosphaphenanthrene structure is introduced, the flame retardant property of the floor is improved, the siloxane chain is introduced, the dispersibility of the modified wood powder in a polymer system is improved, the wood powder is more uniformly dispersed in the polymer system, the reinforcing effect of the modified wood powder on the polymer strength is promoted, the mobility of the modified flame retardant is reduced, the stability of the flame retardant property is improved, and the modified flame retardant in the modified wood powder does not contain halogen and belongs to a chlorine-free flame retardant, so that the modified wood powder is environment-friendly and safe;
secondly, in order to further improve the problem of large smoke amount when the plastic-wood floor is burnt, the invention introduces modified hydrotalcite, and the excellent flame retardant property and smoke suppression property of the hydrotalcite are utilized to play an excellent flame retardant increasing function in cooperation with modified wood powder, so that the plastic-wood floor has excellent flame retardant property; the modified hydrotalcite is prepared by reacting hydroxyl groups among magnesium-aluminum hydrotalcite layers with epoxy groups in 3-glycidoxypropyl trimethoxy silane and chlorine in an intermediate 1 under the condition of supercritical carbon dioxide, so that siloxane chains and fluorine-containing chains are grafted among the magnesium-aluminum hydrotalcite layers, the oleophilic performance of the hydrotalcite is improved, the dispersibility of the modified hydrotalcite in a polymer system is improved, and the fluorine-containing chains are introduced, so that the water absorption performance of the hydrotalcite is reduced (a layer of fluorine-containing chains is easy to form around the hydrotalcite by utilizing the characteristic of low surface energy of the fluorine-containing chains), the contact between water and the hydrotalcite is avoided, the water absorption performance of the hydrotalcite is further improved, the moisture resistance of the plastic-wood floor is further improved due to the introduction of the hydrotalcite, and the waterproof performance of the plastic-wood floor is provided to a certain extent.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Preparation of modified hydrotalcite:
c1, uniformly mixing 0.1mol of hexafluorobutyl methacrylate, 0.12mol of dimethyl chlorosilane and 70mL of dehydrated toluene, adding 10mg of Karstedt catalyst, stirring at 35 ℃ under the protection of nitrogen, reacting for 1.5h, then heating and refluxing for 3h, stopping the reaction, cooling to room temperature, and performing reduced pressure rotary evaporation to obtain an intermediate 1, wherein the Karstedt catalyst is purchased from Hubei Xinkai full chemical Co;
c2, 0.5mol of Mg (N0) 3 ) 2 ·6H 2 0、0.25mol Al(N0 3 ) 2 ·9H 2 0 and 905.5g deionized water to prepare solution A; 2mol/L NaOH, 0.075mol Na 2 C0 3 And 1000g deionized water to prepare a solution B; then 100mL of solution A and 100mL of solution B are respectively dripped into a three-mouth bottle filled with 100mL of deionized water, the pH value is kept between 9 and 9.5 at normal temperature and 200r/min, the solution is continuously stirred for 1h after dripping, crystallized for 18h at 65 ℃, filtered and washed to obtain a filter cake, and the filter cake is dried in a drying oven at 65 ℃ to obtain magnesium aluminum hydrotalcite;
and C3, adding 10g of magnesium aluminum hydrotalcite, 0.5g of 3-glycidoxypropyl trimethoxy silane and 1.5g of intermediate 1 into a closed container accompanied by magnetic stirring, injecting 100mL of supercritical carbon dioxide, ultrasonically stirring for 12 hours under the condition of 11MPa, decompressing and removing carbon dioxide after the reaction is finished, repeatedly washing the reaction product with methanol, and drying in an oven at 60 ℃ for 12 hours to obtain the modified hydrotalcite.
Example 2
Preparation of modified hydrotalcite:
c1, uniformly mixing 0.1mol of hexafluorobutyl methacrylate, 0.15mol of dimethyl chlorosilane and 70mL of dehydrated toluene, adding 10mg of Karstedt catalyst, stirring at 35 ℃ under the protection of nitrogen, reacting for 1.5h, then heating and refluxing for 3h, stopping the reaction, cooling to room temperature, and performing reduced pressure rotary evaporation to obtain an intermediate 1, wherein the Karstedt catalyst is purchased from Hubei Xinkai full chemical Co;
c2, 0.5mol of Mg (N0) 3 ) 2 ·6H 2 0、0.25mol Al(N0 3 ) 2 ·9H 2 0 and 905.5g deionized water to prepare solution A; 2mol/L NaOH, 0.075mol Na 2 C0 3 And 1000g deionized water to prepare a solution B; then, respectively dripping 50mL of the solution A and 50mL of the solution B into a three-mouth bottle filled with 100mL of deionized water, maintaining the pH value between 9.5 and 10 at normal temperature at 300r/min, continuously stirring for 1h after dripping, crystallizing for 18h at 65 ℃, carrying out suction filtration and washing to obtain a filter cake, and drying in a drying oven at 65 ℃ to obtain the magnesium aluminum hydrotalcite;
c3, adding 14g of magnesium aluminum hydrotalcite, 1g of 3-glycidoxypropyl trimethoxysilane and 2.5g of intermediate 1 into a closed container accompanied by magnetic stirring, injecting 100mL of supercritical carbon dioxide, ultrasonically stirring for 12h under the condition of 11MPa, decompressing and removing carbon dioxide after the reaction is finished, repeatedly washing a reaction product with methanol, and drying in an oven at 60 ℃ for 12h to obtain the modified hydrotalcite.
Example 3
Preparation of modified flame retardant:
uniformly mixing 0.11mol of DOPO-BQ, 0.2mol of 3-glycidoxypropyl trimethoxysilane and 100mL of DMAC, adding 2.5g of potassium hydroxide, heating to 82 ℃, stirring and reacting for 6h, stopping the reaction, performing rotary evaporation, and rectifying to obtain the modified flame retardant.
Example 4
Preparation of modified flame retardant:
uniformly mixing 0.12mol of DOPO-BQ, 0.2mol of 3-glycidoxypropyl trimethoxysilane and 250mL of DMAC, adding 3g of potassium hydroxide, heating to 82 ℃, stirring for reaction for 6h, stopping the reaction, performing rotary evaporation, and rectifying to obtain the modified flame retardant.
Example 5
Preparation of modified wood powder:
a1, adding 10g of wood powder into 80g of mixed solvent of toluene/ethanol (the volume ratio of toluene to ethanol is 3:1), heating and refluxing for 3 hours, filtering, taking out the wood powder, adding 60g of deionized water, preserving heat for 5 hours at 50 ℃, filtering, washing with water, washing with ethanol, and drying to obtain defatted wood powder;
a2, adding 8g of defatted wood flour and 100mL of a mixed solvent of dimethylformamide/water (the volume ratio of the dimethylformamide to the water is 2:1) into a three-neck flask with a stirrer, a condenser pipe and a thermometer, regulating the pH value of the solution to 5, stirring for 10min, adding 40g of modified flame retardant, heating to 92 ℃, stirring for reacting for 12h, stopping the reaction, cooling to room temperature, adding water, standing for 1h, filtering, taking the precipitate, washing with water and ethanol for 2 times in sequence, and drying to obtain the modified wood flour.
Example 6
Preparation of modified wood powder:
a1, adding 12g of wood powder into 120g of mixed solvent of toluene/ethanol (the volume ratio of toluene to ethanol is 3:1), heating and refluxing for 3 hours, filtering, taking out the wood powder, adding 96g of deionized water, preserving heat for 5 hours at 50 ℃, filtering, washing with water, washing with ethanol, and drying to obtain defatted wood powder;
a2, adding 12g of defatted wood flour and 150mL of a mixed solvent of dimethylformamide/water (the volume ratio of the dimethylformamide to the water is 2:1) into a three-neck flask with a stirrer, a condenser pipe and a thermometer, regulating the pH value of the solution to 6, stirring for 10min, adding 50g of modified flame retardant, heating to 92 ℃, stirring for reacting for 12h, stopping the reaction, cooling to room temperature, adding water, standing for 2h, filtering, taking the precipitate, washing with water and ethanol for 3 times in sequence, and drying to obtain the modified wood flour.
Example 7
A production process of a co-extrusion halogen-free high flame retardant plastic-wood floor comprises the following steps:
step one, preparing raw materials according to the following weight ratio: 25 parts of polyethylene, 21 parts of modified wood flour prepared in example 5, 6 parts of TPE elastomer, 1.5 parts of compatilizer, 1.5 parts of modified hydrotalcite prepared in example 1, 1.5 parts of lubricant and 1.5 parts of age resister;
the compatilizer is maleic anhydride grafted ethylene copolymer; the lubricant is stearic acid; the anti-aging agent is an antioxidant 1010, an amine-blocking light stabilizer HALS622 and an ultraviolet absorber UV531, and the mass ratio is 1:1:1, mixing;
step two, mixing: adding polyethylene, TPE elastomer, modified wood flour and compatilizer into a high-speed stirrer, stirring for 10min at 85 ℃ under vacuum, adding modified hydrotalcite, lubricant and anti-aging agent, stirring for 20min at 100 ℃ under vacuum, and discharging to obtain a mixture;
step three, co-extrusion: cooling the mixture to 40 ℃, adding a double screw to carry out extrusion granulation, and controlling an extrusion temperature zone: the first region 145 ℃, the second region 150 ℃, the third region 160 ℃, the fourth region 165 ℃, and then transferred into an extruder for extrusion molding, thus obtaining the co-extrusion halogen-free high flame retardant plastic-wood floor, and the extrusion molding temperature is controlled to be 150-170 ℃.
Example 8
A production process of a co-extrusion halogen-free high flame retardant plastic-wood floor comprises the following steps:
step one, preparing raw materials according to the following weight ratio: 356 parts of polyethylene, 32 parts of modified wood flour prepared in example 6, 8 parts of TPE elastomer, 3 parts of compatilizer, 5 parts of modified hydrotalcite prepared in example 2, 3 parts of lubricant and 3 parts of age resister;
the compatilizer is ethylene-vinyl acetate copolymer; the lubricant is PE wax; the anti-aging agent is an antioxidant 1010, an amine-blocking light stabilizer HALS622 and an ultraviolet absorber UV531, and the mass ratio is 1:3:2, mixing;
step two, mixing: adding polyethylene, TPE elastomer, modified wood flour and compatilizer into a high-speed stirrer, stirring for 15min at 90 ℃ under vacuum, adding modified hydrotalcite, lubricant and anti-aging agent, stirring for 20min at 105 ℃ under vacuum, and discharging to obtain a mixture;
step three, co-extrusion: cooling the mixture to 40 ℃, adding a double screw to carry out extrusion granulation, and controlling an extrusion temperature zone: 155 ℃ in the first area, 160 ℃ in the second area, 165 ℃ in the third area and 170 ℃ in the fourth area, and then transferring the mixture into an extruder for extrusion molding to obtain the co-extrusion halogen-free high flame retardant plastic-wood floor, wherein the extrusion molding temperature is controlled to be 160-175 ℃.
Example 9
A production process of a co-extrusion halogen-free high flame retardant plastic-wood floor comprises the following steps:
step one, preparing raw materials according to the following weight ratio: 55 parts of polyethylene, 40 parts of modified wood flour prepared in example 5, 13 parts of TPE elastomer, 3.5 parts of compatilizer, 7.5 parts of modified hydrotalcite prepared in example 1, 4.5 parts of lubricant and 5.5 parts of age resister;
the compatilizer is ethylene-acrylic acid copolymer; the lubricant is magnesium stearate; the anti-aging agent is antioxidant 1010, amine-blocking light stabilizer HALS622 and ultraviolet absorber UV531, and the mass ratio is 3:2:1, mixing;
step two, mixing: adding polyethylene, TPE elastomer, modified wood flour and compatilizer into a high-speed stirrer, stirring for 20min at 85 ℃ under vacuum, adding modified hydrotalcite, lubricant and anti-aging agent, stirring for 30min at 100 ℃ under vacuum, and discharging to obtain a mixture;
step three, co-extrusion: cooling the mixture to 40 ℃, adding a double screw to carry out extrusion granulation, and controlling an extrusion temperature zone: the first area 165 ℃, the second area 170 ℃, the third area 180 ℃, the fourth area 185 ℃, and then transferred into an extruder for extrusion molding to obtain the co-extrusion halogen-free high flame retardant plastic wood floor, wherein the extrusion molding temperature is controlled to be 170-185 ℃.
Comparative example 1
The production process of the co-extrusion halogen-free high flame retardant plastic wood floor is compared with that of the example 7, the modified wood powder is replaced by the modified flame retardant prepared in the example 3, and the rest is the same as the example 7.
Comparative example 2
The production process of the co-extrusion halogen-free high flame retardant plastic wood floor is compared with that of the example 8, the modified wood powder is replaced by the degreasing wood powder prepared in the step A1 of the example 6, and the rest is the same as the example 8.
Comparative example 3
The production process of the co-extrusion halogen-free high flame retardant plastic wood floor is compared with that of the example 9, the modified hydrotalcite is replaced by the magnesium aluminum hydrotalcite prepared by the C2 in the example 1, and the rest is the same as the example 9.
Comparative example 4
The production process of the co-extrusion halogen-free high flame retardant plastic wood floor is compared with that of the embodiment 7, modified hydrotalcite is deleted, and the rest is the same as the embodiment 7.
Example 10
The wood floorings obtained in examples 7 to 9 and comparative examples 1 to 4 were subjected to the following performance tests:
flame retardant rating: testing was performed according to GB 8624;
normal temperature impact toughness and low temperature impact toughness measurement: according to the standard GB/T17657 test, the low temperature is minus 10 ℃;
moisture resistance: according to the standard GB/T17657 test, adopting a cyclic test to observe the appearance of the floor surface and calculate the dimensional change;
smoke density: according to GB/T8323.2-2008 test, a flameless combustion mode is adopted, the test radiation intensity is 25kW/m, and the test time is 20min;
the test results are shown in Table 1.
TABLE 1
As can be seen from the data in table 1, the plastic-wood flooring obtained in examples 7 to 9 exhibited excellent toughness, flame retardancy, moisture resistance and low smoke.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, 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 present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. 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 foregoing is merely illustrative and explanatory of the invention, as various modifications and additions may be made to the particular embodiments described, or in a similar manner, by those skilled in the art, without departing from the scope of the invention or exceeding the scope of the invention as defined in the claims.
Claims (6)
1. A production process of a co-extrusion halogen-free high flame retardant plastic wood floor is characterized by comprising the following steps of: the method comprises the following steps:
step one, preparing modified wood powder: mixing defatted wood flour with a mixed solvent of dimethylformamide/water, regulating the pH value of the solution to 5-6, stirring for 10min, adding a modified flame retardant, heating to 92 ℃, stirring for reacting for 12h, stopping the reaction, cooling to room temperature, adding water, standing for 1-2h, filtering, taking the precipitate, washing with water and ethanol in sequence, and drying to obtain modified wood flour;
step two, mixing: stirring polyethylene, TPE elastomer, modified wood powder and compatilizer at 85-95 ℃ under vacuum for 10-20min, adding modified hydrotalcite, lubricant and aging resistant agent, stirring at 100-105 ℃ under vacuum for 20-30min, and discharging to obtain a mixture;
step three, co-extrusion: extruding and granulating the mixture, and extruding and forming to obtain the co-extruded halogen-free high flame retardant plastic-wood floor;
the modified flame retardant is prepared by the following steps:
uniformly mixing DOPO-BQ, 3-glycidoxypropyl trimethoxy silane and DMAC, adding potassium hydroxide, heating to 82 ℃, stirring for reaction for 6 hours, stopping the reaction, performing rotary evaporation, and rectifying to obtain a modified flame retardant;
the modified hydrotalcite comprises the following steps:
c1, uniformly mixing hexafluorobutyl methacrylate, dimethyl chlorosilane and dehydrated toluene, adding Karstedt catalyst, stirring at 35 ℃ under the protection of nitrogen for reaction for 1.5 hours, heating and refluxing for reaction for 3 hours, stopping the reaction, cooling to room temperature, and performing rotary evaporation under reduced pressure to obtain an intermediate 1;
c2, mg (N0) 3 ) 2 ·6H 2 0、Al(N0 3 ) 3 ·9H 2 0 and deionized water to prepare a solution A; naOH, na 2 C0 3 Preparing solution B by deionized water; then, respectively dripping the solution A and the solution B into deionized water, keeping the pH value between 9 and 10 at normal temperature for 200-300r/min, continuously stirring for 1h after dripping, crystallizing for 18h at 65 ℃, filtering, washing to obtain a filter cake, and drying in an oven to obtain the magnesium-aluminum hydrotalcite;
and C3, adding the magnesium aluminum hydrotalcite, the 3-glycidoxypropyl trimethoxy silane and the intermediate 1 into a closed container, injecting supercritical carbon dioxide, ultrasonically stirring for 12 hours under the condition of 11MPa, removing the carbon dioxide under reduced pressure after the reaction is finished, repeatedly washing with methanol, and drying in an oven to obtain the modified hydrotalcite.
2. The production process of the co-extrusion halogen-free high flame retardant plastic wood floor according to claim 1, which is characterized in that: the using amount ratio of the defatted wood flour, the mixed solvent of dimethylformamide/water and the modified flame retardant in the first step is 8-12g:100-150mL:40-50g.
3. The production process of the co-extrusion halogen-free high flame retardant plastic wood floor according to claim 1, which is characterized in that: the dosage ratio of DOPO-BQ, 3-glycidoxypropyl trimethoxy silane and DMAC is 0.11-0.12mol:0.2mol:100-250mL.
4. The production process of the co-extrusion halogen-free high flame retardant plastic wood floor according to claim 1, which is characterized in that: the dosage ratio of hexafluorobutyl methacrylate, karstedt catalyst and dimethylchlorosilane in step C1 was 0.1mol:10mg:0.12-0.15mol.
5. The production process of the co-extrusion halogen-free high flame retardant plastic wood floor according to claim 1, which is characterized in that: in the step C2, the volume ratio of the solution A to the solution B is 1:1, the concentration of magnesium ions in the solution A is 0.5mol/L, the concentration of aluminum ions is 0.25mol/L, the concentration of sodium ions in the solution B is 2.15mol/L, and the concentration of hydroxide ions is 2mol/L.
6. The production process of the co-extrusion halogen-free high flame retardant plastic wood floor according to claim 1, which is characterized in that: in the step C3, the dosage ratio of the magnesium aluminum hydrotalcite to the 3-glycidoxypropyl trimethoxysilane to the intermediate 1 to the supercritical carbon dioxide is 10-14g:0.5-1g:1.5-2.5g:100mL.
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