CN116925560B - Building decorative plate and preparation method thereof - Google Patents
Building decorative plate and preparation method thereof Download PDFInfo
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- CN116925560B CN116925560B CN202310867426.6A CN202310867426A CN116925560B CN 116925560 B CN116925560 B CN 116925560B CN 202310867426 A CN202310867426 A CN 202310867426A CN 116925560 B CN116925560 B CN 116925560B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 46
- 238000006243 chemical reaction Methods 0.000 claims abstract description 44
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 23
- YXRKNIZYMIXSAD-UHFFFAOYSA-N 1,6-diisocyanatohexane Chemical compound O=C=NCCCCCCN=C=O.O=C=NCCCCCCN=C=O.O=C=NCCCCCCN=C=O YXRKNIZYMIXSAD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229920000642 polymer Polymers 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 125000003354 benzotriazolyl group Chemical group N1N=NC2=C1C=CC=C2* 0.000 claims abstract description 4
- 125000003700 epoxy group Chemical group 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims abstract description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 21
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 14
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 14
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 12
- 239000012295 chemical reaction liquid Substances 0.000 claims description 12
- 229920000587 hyperbranched polymer Polymers 0.000 claims description 11
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 238000002390 rotary evaporation Methods 0.000 claims description 8
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 7
- 238000000748 compression moulding Methods 0.000 claims description 6
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000004132 cross linking Methods 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract 2
- 230000032683 aging Effects 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 239000004033 plastic Substances 0.000 description 7
- 229920003023 plastic Polymers 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- 150000001565 benzotriazoles Chemical class 0.000 description 5
- 238000007792 addition Methods 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- MCPKSFINULVDNX-UHFFFAOYSA-N drometrizole Chemical class CC1=CC=C(O)C(N2N=C3C=CC=CC3=N2)=C1 MCPKSFINULVDNX-UHFFFAOYSA-N 0.000 description 3
- LRWZZZWJMFNZIK-UHFFFAOYSA-N 2-chloro-3-methyloxirane Chemical compound CC1OC1Cl LRWZZZWJMFNZIK-UHFFFAOYSA-N 0.000 description 2
- VGCXGMAHQTYDJK-UHFFFAOYSA-N Chloroacetyl chloride Chemical compound ClCC(Cl)=O VGCXGMAHQTYDJK-UHFFFAOYSA-N 0.000 description 2
- 230000000875 corresponding effect Effects 0.000 description 2
- 238000009795 derivation Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 1
- 150000001263 acyl chlorides Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000006266 etherification reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G83/00—Macromolecular compounds not provided for in groups C08G2/00 - C08G81/00
- C08G83/002—Dendritic macromolecules
- C08G83/005—Hyperbranched macromolecules
- C08G83/006—After treatment of hyperbranched macromolecules
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/20—Recycled plastic
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a building decorative plate and a preparation method thereof. The building decorative plate comprises the following raw materials in parts by weight: 100 parts of PCR material and 10-20 parts of heat-resistant auxiliary agent. The heat-resistant auxiliary agent is an epoxy group end-capped polymer obtained by sequentially carrying out hyperbranched reaction and end-capping reaction on an HDI trimer and weather-resistant dihydric alcohol. The molecular structure of the heat-resistant auxiliary agent contains a benzotriazole structure, so that the obtained plate has excellent light stability; thirdly, the molecular theme skeleton is formed by reacting an HDI trimer and weather-resistant dihydric alcohol, wherein the hard chain of the HDI trimer has excellent heat resistance and weather resistance, and the elasticity, heat resistance and weather resistance of the obtained plate are improved; fourthly, the molecular chain end of the composite material is epoxy group, so that the composite material is easy to crosslink in the processing process, the formation of interpenetrating network in the obtained plate system is promoted, the crosslinking degree of the obtained plate is provided, and the heat resistance and weather resistance of the obtained plate are further improved.
Description
Technical Field
The invention belongs to the technical field of building board preparation, and particularly relates to a building decorative board and a preparation method thereof.
Background
PCR is known as Post-Consumer Recycled material, a Post-consumer recycled plastic such as a terpolymer of polyethylene, polypropylene, acrylonitrile Butadiene Styrene (ABS), nylon (PA), polycarbonate (PC) and the like. The life cycle of the plastic is prolonged from the application point of view due to the application and recovery of the PCR, which is favorable for reducing the pollution of the plastic and becomes a hot spot in the existing plastic preparation field.
However, due to the characteristics of recycled plastics, the relative molecular mass distribution in the polymer system is wider after aging is carried out by using the PCR, and the corresponding mechanical and mechanical properties are reduced, so that the heat resistance and weather-proof aging resistance of the building board prepared from the PCR are low, and the further popularization and application of the PCR are not facilitated.
Based on the above, the invention provides a building decorative plate and a preparation method thereof.
Disclosure of Invention
The invention aims to provide a building decorative plate and a preparation method thereof,
the invention aims to solve the technical problems: the building board prepared by PCR in the preparation of the existing building board has low heat resistance and weather aging resistance.
The first object of the present invention can be achieved by the following technical scheme:
the building decorative plate comprises the following raw materials in parts by weight: 100 parts of PCR material and 10-20 parts of heat-resistant auxiliary agent.
Further, the heat-resistant auxiliary agent is an epoxy group-terminated polymer obtained by sequentially carrying out hyperbranched reaction and capping reaction on hexamethylene diisocyanate-based polyisocyanate (HDI trimer) and weather-resistant dihydric alcohol.
Further, the specific operation of the hyperbranched reaction is as follows:
after evenly mixing the HDI trimer and the weather-resistant dihydric alcohol, stirring and reacting for 3-4 hours at 80-90 ℃ under the protection of nitrogen, adding N, N-dimethylformamide, heating to 95-105 ℃, and continuously stirring and reacting for 1-1.5 hours to obtain hyperbranched polymer reaction liquid.
Further, the molar ratio of the HDI trimer to the weather-resistant dihydric alcohol is 2:3-5.
Further, the end capping reaction is specifically performed as follows:
adding epichlorohydrin into hyperbranched polymer reaction liquid obtained by hyperbranched reaction, regulating the pH of the reaction liquid to 9-10, stirring for 1-2h at 60-65 ℃ under the protection of nitrogen, then stirring for 1.5-3h at 70-75 ℃, stopping the reaction, and performing reduced pressure rotary evaporation to obtain the polymer.
Further, the amount of the added substance of the epichlorohydrin is equal to the amount of the added substance of the weather-resistant dihydric alcohol in the hyperbranched reaction.
Further, the weather-resistant dihydric alcohol comprises the following steps:
uniformly mixing glycerol, potassium carbonate and potassium iodide, heating to a reaction temperature, slowly dropwise adding tetrahydrofuran containing benzotriazole derivatives, continuously stirring and reacting for 1.5-2.5 hours after the dropwise adding is completed, stopping the reaction, cooling, and performing reduced pressure rotary evaporation to obtain weather-resistant dihydric alcohol, wherein the dosage ratio of the glycerol, the potassium carbonate, the potassium iodide and the benzotriazole derivatives is 0.11-0.13mol:0.15mol:0.5-1.2g:0.1mol, and the reaction temperature is 90-95 ℃.
In the above reaction, the weather-resistant diol is obtained by etherification reaction of hydrogen bond in glycerol and chlorinated 2- (2 ' -hydroxy-5-methylphenyl) benzotriazole under the action of potassium carbonate and potassium iodide, wherein the benzotriazole derivative is obtained by reaction of 2- (2 ' -hydroxy-5-methylphenyl) benzotriazole and chloroacetyl chloride, and is obtained by reaction of hydroxyl group in 2- (2 ' -hydroxy-5-methylphenyl) benzotriazole (which is a benzotriazole donor) and acyl chloride in chloroacetyl chloride, and HCl is generated due to the reaction, and an acid-applying agent is generally added to the reaction to promote the progress of the reaction, such as triethylamine, which is well known to those skilled in the art, and the invention is not repeated herein.
The second object of the present invention can be achieved by the following technical scheme:
a method for preparing a building decorative plate, comprising:
adding part of the PCR material and the heat-resistant auxiliary agent into an extruder for melt mixing, adding the rest of the PCR material from a side opening, and then extruding and compression molding.
Further, the mass ratio of the partial PCR material to the residual PCR material is 70-98:2-30.
In the preparation method, the invention ensures that partial PCR and the heat-resistant auxiliary agent are fused and mixed in an extruder to obtain a fused matrix, then the residual PCR material is added from a side port, the residual PCR material is dispersed in the fused matrix in a special form due to short stay time in the extruder and incomplete fusion, and the residual PCR material has a fused chain and a non-fused solid state, so that on one hand, the fused chain and the molecular chain of the PCR material in the fused matrix are completely compatible, and a strong interface performance exists between the residual PCR material and the matrix, and on the other hand, the non-fused solid state of the residual PCR material plays a role of a solid reinforcing phase, thereby blocking the derivation and development of cracks, improving the mechanical property of the obtained plate, and the non-fused solid state retains the inherent color and pattern of the PCR material, thereby endowing the obtained plate with unique pattern and novel appearance.
The invention has the beneficial effects that:
in order to solve the problems in the background technology, the invention introduces a heat-resistant auxiliary agent into the PCR material, wherein the heat-resistant auxiliary agent is an epoxy-terminated polymer obtained by sequentially carrying out hyperbranched reaction and end-capping reaction on an HDI trimer and a weather-resistant dihydric alcohol, and firstly, the molecular structure of the heat-resistant auxiliary agent contains a benzotriazole structure, so that the obtained board has excellent light stability; secondly, the molecules are formed by hyperbranched reaction, so that the hyperbranched polymer has excellent processing characteristics and can be uniformly distributed in the PCR material; thirdly, the molecular theme skeleton is formed by reacting an HDI trimer and weather-resistant dihydric alcohol, so that the polyurethane elastomer is formed, wherein the hard chain of the HDI trimer has excellent heat resistance and weather resistance, and the elasticity, heat resistance and weather resistance of the obtained plate are improved; fourthly, the molecular chain end of the material is epoxy group, and the material is matched with the uniform dispersibility in the PCR material and the hyperbranched structure, so that the material is easy to crosslink in the processing process, the formation of an interpenetrating network in the obtained plate system is promoted, the crosslinking degree of the obtained plate is provided, and the heat resistance and weather resistance of the obtained plate are further improved;
secondly, in order to further improve the hardness and mechanical properties of the obtained plate, the invention adopts the step-by-step addition of the PCR material, so that a part of the PCR material exists in a PCR melt base material in a melt chain and a non-melt solid state to play the role of a solid reinforcing phase, thereby being capable of preventing the derivation and development of cracks, improving the hardness and mechanical properties of the obtained plate, and endowing the obtained plate with unique patterns and novel appearance in the non-melt solid state;
and the base material is the PCR material, so that the application of the PCR material is expanded, the plastic pollution is reduced, meanwhile, the used plate can be continuously crushed for use, the life cycle of the plastic is prolonged, and the sustainable development of pollution reduction and carbon reduction is promoted.
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 weather-resistant dihydric alcohol:
uniformly mixing 0.11mol of glycerol, 0.15mol of potassium carbonate and 0.5g of potassium iodide, heating to 90 ℃, slowly dropwise adding 50mL of tetrahydrofuran containing 0.1mol of benzotriazole derivative, continuously stirring for reaction for 1.5h after the dropwise addition is completed, stopping the reaction, cooling, and performing reduced pressure rotary evaporation to obtain the weather-resistant dihydric alcohol.
Example 2
Preparation of weather-resistant dihydric alcohol:
uniformly mixing 0.13mol of glycerol, 0.15mol of potassium carbonate and 1.2g of potassium iodide, heating to 95 ℃, slowly dropwise adding 50mL of tetrahydrofuran containing 0.1mol of benzotriazole derivative, continuously stirring for reaction for 2.5h after the dropwise addition is completed, stopping the reaction, cooling, and performing reduced pressure rotary evaporation to obtain the weather-resistant dihydric alcohol.
Example 3
Preparation of heat-resistant auxiliary agent:
uniformly mixing 0.2mol of HDI trimer and 0.3mol of weather-resistant dihydric alcohol prepared in the embodiment 1, stirring under the protection of nitrogen at 80 ℃ for reaction for 4 hours, adding 60mL of N, N-dimethylformamide, heating to 95 ℃, and continuously stirring for reaction for 1.5 hours to obtain hyperbranched polymer reaction liquid;
and step two, adding 0.3mol of epoxy chloropropane into the hyperbranched polymer reaction liquid obtained in the step one, regulating the pH of the reaction liquid to 9-10, stirring for 1h at 60 ℃ under the protection of nitrogen, then stirring for 1.5h at 70 ℃, stopping the reaction, and performing reduced pressure rotary evaporation to obtain the hyperbranched polymer.
Example 4
Preparation of heat-resistant auxiliary agent:
uniformly mixing 0.2mol of HDI trimer and 0.5mol of weather-resistant dihydric alcohol prepared in the embodiment 2, stirring under the protection of nitrogen at 90 ℃ for reaction for 4 hours, adding 60mL of N, N-dimethylformamide, heating to 105 ℃, and continuously stirring for reaction for 1.5 hours to obtain hyperbranched polymer reaction liquid;
and step two, adding 0.5mol of epoxy chloropropane into the hyperbranched polymer reaction liquid obtained in the step one, regulating the pH of the reaction liquid to 9-10, stirring for 2 hours at 65 ℃ under the protection of nitrogen, stirring for 3 hours at 75 ℃, stopping the reaction, and performing reduced pressure rotary evaporation to obtain the hyperbranched polymer.
Example 5
Preparing a building decorative plate:
step one, preparing the following raw materials in parts by weight: 100 parts of PCR material and 10 parts of heat-resistant auxiliary agent prepared in example 3;
and secondly, adding 70wt% of PCR material and heat-resistant auxiliary agent into an extruder for melt mixing, adding the rest of PCR material from a side opening, and then extruding and compression molding.
Example 6
Preparing a building decorative plate:
step one, preparing the following raw materials in parts by weight: 100 parts of PCR material and 15 parts of heat-resistant auxiliary agent prepared in example 4;
and secondly, adding 85wt% of the PCR material and the heat-resistant auxiliary agent into an extruder for melt mixing, adding the rest of the PCR material from a side opening, and extruding and compression molding.
Example 7
Preparing a building decorative plate:
step one, preparing the following raw materials in parts by weight: 100 parts of PCR material and 20 parts of heat-resistant auxiliary agent prepared in example 3;
and secondly, adding 98wt% of PCR material and heat-resistant auxiliary agent into an extruder for melt mixing, adding the rest of PCR material from a side opening, and then extruding and compression molding.
Comparative example 1
Preparing a building decorative plate:
the same as in example 5 except that the PCR material was used instead of the heat-resistant auxiliary agent in the raw material in equal parts by weight.
Comparative example 2
Preparing a building decorative plate:
step one, the same as in example 5.
And step two, adding the PCR material and the heat-resistant auxiliary agent into an extruder for melt mixing, and then extruding and compression molding to obtain the PCR material.
Comparative example 3
Preparing a building decorative plate:
step one, the same as comparative example 1;
step two, the same as comparative example two.
Example 8
The physical properties of the sheets obtained in examples 5 to 7 and comparative examples 1 to 3 were tested, and the results are shown in Table 1, wherein the ultraviolet aging resistance and the heat aging resistance were measured as the decrease rate of the tensile strength.
TABLE 1
As can be seen from the data in Table 1, the sheets obtained in examples 5-7 were superior in hardness, warfare strength, UV aging resistance and heat aging resistance to the corresponding properties of the sheets obtained in comparative examples 1-3.
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 (7)
1. A building decorative panel, characterized in that: the material comprises the following raw materials in parts by weight: 100 parts of PCR material and 10-20 parts of heat-resistant auxiliary agent;
the heat-resistant auxiliary agent is an epoxy group end-capped polymer obtained by sequentially carrying out hyperbranched reaction and end-capping reaction on an HDI trimer and weather-resistant dihydric alcohol;
the specific operation of the hyperbranched reaction is as follows:
uniformly mixing an HDI trimer and weather-resistant dihydric alcohol, stirring under the protection of nitrogen at 80-90 ℃ for reaction for 3-4 hours, adding N, N-dimethylformamide, heating to 95-105 ℃, and continuously stirring for reaction for 1-1.5 hours to obtain hyperbranched polymer reaction liquid;
the specific operation of the end capping reaction is as follows:
adding epichlorohydrin into hyperbranched polymer reaction liquid obtained by hyperbranched reaction, regulating the pH of the reaction liquid to 9-10, stirring for 1-2h at 60-65 ℃ under the protection of nitrogen, then stirring for 1.5-3h at 70-75 ℃, stopping the reaction, and performing reduced pressure rotary evaporation to obtain the polymer;
the weather-resistant dihydric alcohol comprises the following steps:
mixing glycerol, potassium carbonate and potassium iodide uniformly, heating to a reaction temperature, slowly dropwise adding tetrahydrofuran containing benzotriazole derivatives, continuously stirring and reacting for 1.5-2.5h after the dropwise adding is completed, stopping the reaction, cooling, and performing reduced pressure rotary evaporation to obtain weather-resistant dihydric alcohol.
2. A building dalle as defined in claim 1, wherein: the molar ratio of the HDI trimer to the weather-resistant dihydric alcohol is 2:3-5.
3. A building dalle as defined in claim 1, wherein: the added substance amount of the epichlorohydrin is equal to the added substance amount of the weather-proof dihydric alcohol in the hyperbranched reaction.
4. A building dalle as defined in claim 1, wherein: the reaction temperature of the weather-proof dihydric alcohol preparation reaction is 90-95 ℃.
5. A building dalle as defined in claim 1, wherein: the dosage ratio of the glycerol, the potassium carbonate, the potassium iodide and the benzotriazole derivative is 0.11-0.13mol:0.15mol:0.5-1.2g:0.1mol.
6. A method of making a building decorative panel comprising the building decorative panel of any one of claims 1-5, comprising:
adding part of the PCR material and the heat-resistant auxiliary agent into an extruder for melt mixing, adding the rest of the PCR material from a side opening, and then extruding and compression molding.
7. The method for preparing a building decorative plate according to claim 6, wherein the mass ratio of the partial PCR material to the residual PCR material is 70-98:2-30.
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