Anti-aging high-toughness edge strip material and preparation method thereof

Abstract

The application discloses an anti-aging high-toughness edge strip material and a preparation method thereof, and comprises the following raw materials in parts by weight: 100 parts of PVC resin, 8-12 parts of chlorinated polyethylene, 25-35 parts of modified calcium carbonate, 20-30 parts of plasticizer, 0.6-1 part of stearic acid, 0.5-0.8 part of PE wax, 4-6 parts of stabilizer, 0.3-0.6 part of palm oil, 3-5 parts of titanium white, and 0.1-0.15 part of color powder. The material not only has excellent mechanical properties, but also has excellent weather resistance and dimensional stability; the preparation process is mature, energy consumption is low, and product quality is stable; and the technical problem that traditional PVC edge strip materials are difficult to balance toughness and anti-aging performance is solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of edge banding, and particularly relates to an anti-aging high-toughness edge banding material and a preparation method thereof. BACKGROUND

[0002] Edge banding is a material for protecting, decorating and beautifying the section of a furniture board, and its main function is to seal the section of the board to prevent the board from being damaged by adverse factors in the environment and use process. Common edge banding is generally divided into original wood edge banding and traditional polyvinyl chloride (PVC) edge banding. The original wood edge banding is simple to make but expensive, and its raw material mainly comes from the original wood bark of trees. In recent years, in order to protect forest resources and limit the felling of trees, the source of raw materials for original wood edge banding is limited. Therefore, people think of using PVC to replace the original wood bark as the main raw material for making edge banding. The main component of PVC edge banding is polyvinyl chloride, which is made through mixing, calendering, vacuum suction molding and other processes. The product is widely used in furniture, office, kitchenware, teaching equipment, civil laboratory, etc. The thickness is from 0.3 to 3 mm, and the width is from 12 mm to 80 mm. The product has the following main characteristics: smooth surface, no blister, no pull line, moderate gloss, flat surface and back, uniform thickness, consistent width, reasonable hardness, good quality, strong wear resistance, color close to the surface after edge trimming, no whitening, good gloss, and good color coordination of the whole furniture product.

[0003] However, there are two main technical bottlenecks in the practical application of traditional PVC edge strip materials: insufficient toughness and poor aging resistance. Insufficient toughness leads to brittle fracture of the edge strip during small radius wrapping or use in low temperature environments, affecting processing efficiency and yield. Poor aging resistance is manifested in the gradual degradation of the material under the action of long-term light (especially ultraviolet light) and heat, resulting in discoloration, yellowing, surface cracking, and a sharp decline in mechanical properties, which seriously affects the appearance and service life of furniture. To overcome these defects, existing technologies mainly use two technical paths: one is to add impact modifiers (such as chlorinated polyethylene CPE, acrylic ester copolymer ACR, etc.) to the PVC formula to improve the toughness of the material; the second is to add ultraviolet absorbers and antioxidants to improve the weather resistance of the material. Although the above existing technologies improve the performance of the edge strip material to some extent, there are still obvious technical defects. First, the physical blending of small molecule additives such as impact modifiers and ultraviolet absorbers with the PVC matrix has poor compatibility and is prone to migration. These additives will gradually migrate to the surface of the material during long-term use or heating, resulting in "over-aging" failure of performance, and the anti-aging and toughening effects cannot be sustained. Second, in order to achieve ideal toughness and weather resistance, a large amount of various additives is often added, which not only significantly increases the cost of the formula, but also may affect the processing fluidity and other physical properties of the material due to the mutual interference between the additives. Finally, traditional inorganic fillers (such as ordinary calcium carbonate) can reduce costs and increase material rigidity, but their poor interfacial bonding with the PVC matrix often becomes a stress concentration point, sacrificing the toughness and impact strength of the material and failing to fundamentally solve the performance shortfalls of the material. Chinese Patent Application CN103740030A discloses a door and window edge strip material using thermoplastic elastomer SEBS as the base material and a preparation method thereof, which is composed of the following raw materials: SEBS rubber resin, polypropylene resin, vulcanizing agent system, antioxidant, light stabilizer, and processing aid, but the cost is high and the service life is short.

[0004] Therefore, it is a technical problem to be solved in the field to develop an edge strip that can synergistically improve the toughness and aging resistance of the material from the internal structure. SUMMARY

[0005] To overcome the shortcomings of the prior art, the purpose of the present application is to provide an anti-aging high-toughness edge strip and a preparation method thereof.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] An anti-aging high-toughness edge strip material, by weight, includes the following raw materials:

[0008] PVC resin 100 parts, chlorinated polyethylene 8-12 parts, modified calcium carbonate 25-35 parts, plasticizer 20-30 parts, stearic acid 0.6-1 part, PE wax 0.5-0.8 part, stabilizer 4-6 parts, palm oil 0.3-0.6 parts, titanium dioxide 3-5 parts, color powder 0.1-0.15 parts.

[0009] Preferably, an anti-aging high-toughness edge strip material comprises the following raw materials by weight:

[0010] PVC resin 100 parts, chlorinated polyethylene 9-11 parts, modified calcium carbonate 30-35 parts, plasticizer 25-30 parts, stearic acid 0.8-1 part, PE wax 0.6-0.7 part, stabilizer 5-6 parts, palm oil 0.4-0.5 parts, titanium dioxide 3-4 parts, color powder 0.1-0.15 parts.

[0011] In the present application, based on a specific PVC / CPE composite material, a specific method modified calcium carbonate is added, and at the same time, plasticizer, stearic acid (internal lubricant), PE wax (external lubricant), palm oil, stabilizer and titanium dioxide are supplemented, so that the prepared edge strip has excellent processability and product appearance quality; wherein the palm oil as a high-efficiency, synergistic composite lubricant can synergistically act with stearic acid and PE wax to provide excellent external sliding effect in the early and middle stages of processing, and also provide certain internal sliding effect, and help other powders (such as calcium carbonate, titanium dioxide, etc.) to be better dispersed, so that the surface gloss of the edge strip is higher and the hand feeling is more delicate.

[0012] Preferably, the stabilizer is a calcium-zinc composite stabilizer, and the titanium dioxide is R-996.

[0013] Preferably, the preparation method of the modified calcium carbonate comprises the following steps:

[0014] S1, the calcium carbonate is added to dilute acetic acid for surface etching, and after etching, it is washed to neutral, dried, and then the solid product is added to a ball mill with triethanolamine for ball milling, and after ball milling, pretreated calcium carbonate is obtained;

[0015] S2, the pretreated calcium carbonate in step S1 is added to an ethanol aqueous solution, then γ-mercaptopropyltrimethoxysilane is added, and stirring reaction is carried out, after reaction, filtration, washing and drying, mercapto calcium carbonate is obtained;

[0016] S3, the mercapto calcium carbonate in step S2 is added to DMF, then 2,4,5-trimethoxycinnamic acid and azobisisobutyronitrile are added, and heating reaction is carried out, after reaction, filtration, washing and drying, organic calcium carbonate is obtained;

[0017] S4, adding the organic carbonated calcium carbonate in step S3 into DMF, then adding 1-(10-hydroxydecyl) imidazole, DMAP, DCC, and performing constant temperature reaction, and after the reaction is completed, filtering, washing, and drying, the modified calcium carbonate is obtained.

[0018] Preferably, in step S1, the mass concentration of the dilute acetic acid is 0.3-0.5%, the etching temperature is 20-25℃, and the time is 3-5min; the mass ratio of the solid product to triethanolamine is 95-97:3-5, the rotation speed of the ball milling is 1000-1500r / min, and the time is 10-15min.

[0019] In the present application, the calcium carbonate is etched by dilute acetic acid, the acetic acid can react with the passivation layer (such as adsorbed impurities) and trace alkaline oxides on the surface of the calcium carbonate, exposing fresh and high-activity CaCO3 lattice, and then the triethanolamine is co-ball milled, the strong mechanochemical action promotes the nitrogen atom and the hydroxyl oxygen atom in the triethanolamine molecule to form coordination bonding with the calcium ions on the surface of the CaCO3, and the triethanolamine molecule is firmly “riveted” on the particle surface, so that there are a large number of active hydroxyl groups on the calcium carbonate, and the efficiency of the subsequent reaction is improved.

[0020] Preferably, in step S2, the volume ratio of ethanol to water in the aqueous ethanol solution is 7-8:2-3, the mass ratio of the pretreated calcium carbonate to γ-mercaptopropyltrimethoxysilane is 90-100:8-12, and the temperature of the stirring reaction is 60-70℃, and the time is 4-6h.

[0021] In the present application, the pretreated calcium carbonate is reacted with γ-mercaptopropyltrimethoxysilane, so that the mercapto group is introduced on the calcium carbonate, which is beneficial to the subsequent reaction.

[0022] Preferably, in step S3, the mass ratio of the mercapto-modified calcium carbonate, 2,4,5-trimethoxycinnamic acid, and azobisisobutyronitrile is 90-100:9.5-14.5:0.2-0.3, the temperature of the heating reaction is 70-80℃, and the time is 3-4h.

[0023] In the present application, 2,4,5-trimethoxycinnamic acid is introduced onto calcium carbonate by a free radical addition reaction, 2,4,5-trimethoxycinnamic acid has a cinnamic acid core conjugated structure, and also has three methoxy groups as strong electron-donating groups, when irradiated by ultraviolet light, through intramolecular electron transition and resonance, high-energy, harmful ultraviolet energy is quickly converted into low-energy, harmless heat energy, and is released, and the 2,4,5-trimethoxycinnamic acid is introduced onto the calcium carbonate by a chemical bonding method, the migration problem is solved, long-term protection is achieved, and because the 2,4,5-trimethoxycinnamic acid is integrated into the calcium carbonate as the main filler, the distribution of the functional groups is completely equivalent to the distribution of the filler, and this in-situ and uniform protection is more efficient and reliable than the protection "blind area" caused by uneven dispersion or local agglomeration of small molecule additives.

[0024] Preferably, the mass ratio of the organic modified calcium carbonate, 1-(10-hydroxydecyl) imidazole, DMAP, and DCC in step S4 is 90-100:8-12:0.3-0.5:12-18, and the temperature of the constant temperature reaction is 25-30 DEG C, and the time is 12-16 h.

[0025] In the present application, 1-(10-hydroxydecyl) imidazole is introduced onto calcium carbonate by an esterification reaction, on the one hand, the nitrogen-containing heterocyclic structure in 1-(10-hydroxydecyl) imidazole has a strong dipole-dipole interaction with the polar chlorine atoms in the PVC molecular chain, which can greatly enhance the interfacial bonding force between the filler and the PVC matrix, on the other hand, the decyl flexible chain of 1-(10-hydroxydecyl) imidazole forms a flexible transition layer at the interface between the filler and the matrix. When the material is impacted, these "molecular springs" can absorb and dissipate impact energy through their own movement and deformation, thereby playing a significant toughening effect, and more importantly, the imidazole ring as a high-efficiency acid absorber can capture HCl released by PVC during processing or use due to degradation, effectively cutting off the self-catalytic chain of degradation, and producing a significant synergistic stabilizing effect with the calcium-zinc main stabilizer in the formula, thereby imparting excellent long-term thermal-oxidative stability and weather resistance to the material.

[0026] The present application also protects a preparation method of the anti-aging high-toughness edge strip material as described above, comprising the following steps:

[0027] The raw materials are weighed according to the formula, the PVC resin, chlorinated polyethylene, stabilizer, modified calcium carbonate, plasticizer, stearic acid, PE wax, palm oil, titanium white, and color powder are mixed in a high-speed mixer, and then the mixture is put into a double-screw extruder for up-extrusion molding, and the anti-aging high-toughness edge strip material is obtained.

[0028] Preferably, the high-speed mixer has a rotation speed of 600-800 r / min, and the mixing time is 3-5 min; the extrusion molding process is as follows: the first section is at 140-150 DEG C, the second section is at 150-160 DEG C, the third section is at 155-165 DEG C, the fourth section is at 160-170 DEG C, and the mold temperature is 160-170 DEG C.

[0029] Compared with the prior art, the application has the following beneficial effects:

[0030] (1) The anti-aging high-toughness edge strip material provided by the application successfully prepares an edge strip material with excellent anti-aging performance and high toughness by using modified calcium carbonate prepared by a specific method in a specific PVC / CPE composite material formula system, combining with optimized step-by-step mixing and extrusion process, the material not only performs well in mechanical properties (such as tensile strength and elongation at break), but also has excellent weather resistance and dimensional stability, and the preparation process is mature, the energy consumption is low, the product quality is stable, and the technical problem that traditional PVC edge strip materials are difficult to balance toughness and anti-aging performance is solved.

[0031] (2) The anti-aging high-toughness edge strip material provided by the application adds modified calcium carbonate, which is first treated by acid etching and triethanolamine ball milling to remove the passivation layer on the surface of the calcium carbonate and moderately increase the surface roughness, and the ball milling efficiently anchors the triethanolamine on the surface of the particles through mechanical chemical action, significantly increasing the surface hydroxyl density, which not only effectively avoids the problem that the triethanolamine may have a side reaction with the silane coupling agent in the subsequent liquid phase reaction, but also greatly improves the reactivity of the surface of the calcium carbonate through double action; then, 2,4,5-trimethoxycinnamic acid is grafted onto the calcium carbonate treated by the silane coupling agent through a free radical addition reaction, the 2,4,5-trimethoxycinnamic acid has a cinnamic acid core conjugated structure and three methoxy groups as strong electron-donating groups, when irradiated by ultraviolet light, the high-energy and harmful ultraviolet light energy is rapidly converted into low-energy and harmless heat energy through intramolecular electron transition and resonance, and the 2,4,5-trimethoxycinnamic acid is introduced onto the calcium carbonate through chemical bonding, solving the migration problem and realizing long-acting protection; finally, 1-(10-hydroxydecyl) imidazole containing an imidazole ring is grafted onto the calcium carbonate through an esterification reaction, on the one hand, the nitrogen-containing heterocyclic structure can produce strong interaction with the polar groups in the PVC matrix, significantly enhancing the interfacial compatibility between the inorganic filler and the organic matrix; on the other hand, the flexible long carbon chain (hydroxydecyl) acts as a "molecular spring" in the interfacial layer, effectively dissipating and transferring impact energy, and more importantly, the imidazole ring as an efficient acid absorber can capture the HCl released due to degradation of the PVC during processing or use, effectively breaking the self-catalytic chain of degradation, and producing a significant synergistic stabilizing effect with the calcium-zinc main stabilizer in the formula, thereby endowing the material with excellent long-term thermal-oxidative stability and weather resistance, and the application integrates the functions of "ultraviolet absorption", "interfacial toughening" and "synergistic thermal stabilization" on a single filler, so that the multifunctional filler can exert the overall synergistic advantage in the PVC matrix.

[0032] (3) The anti-aging high-toughness edge strip material provided by the application first premixes PVC, CPE and stabilizers to build a stable resin matrix, and then adds modified calcium carbonate and other additives, which effectively ensures the uniform dispersion of each component, especially the functionalized filler, and avoids agglomeration; at the same time, the four-stage progressive temperature rising extrusion process not only realizes the full plasticization of the material at a lower processing temperature, saving energy, but more importantly, effectively avoids the thermal degradation of the PVC material and the organic functional groups on the surface of the modified calcium carbonate during the processing process, thereby maximizing the realization of the complete performance of the final product. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 The edge strip prepared in Example 1 of the application is shown in the figure. DETAILED DESCRIPTION

[0034] The technical solutions of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0035] Unless otherwise specified, the chemicals and materials in the present application are purchased through market channels or synthesized from raw materials purchased through market channels.

[0036] The grade of the PVC resin is SG-5; the grade of the CPE is 135A; the particle size of the calcium carbonate is 5-10 μm; the CAS number of the 2,4,5-trimethoxycinnamic acid is 24160-53-0; and the CAS number of the 1-(10-hydroxydecyl)imidazole is 186788-38-5. Example 1

[0037] An anti-aging high-toughness edge strip material comprises the following raw materials in parts by weight:

[0038] PVC resin 100 parts, chlorinated polyethylene 10 parts, modified calcium carbonate 30 parts, dioctyl terephthalate 25 parts, stearic acid 0.8 part, PE wax 0.7 part, calcium-zinc composite stabilizer 5 parts, palm oil 0.5 part, titanium white powder R-996 4 parts, and color powder 0.13 part.

[0039] The preparation method of the modified calcium carbonate comprises the following steps:

[0040] S1, 1 kg of calcium carbonate is added into 5 kg of dilute acetic acid with a mass concentration of 0.4%, and surface etching is performed at 23℃ for 4 min. After etching, washing is performed until neutral, and then drying is performed. Then, 960 g of solid product and 40 g of triethanolamine are added into a ball mill, ball milling is performed at a speed of 1300 r / min for 12 min, and then pretreated calcium carbonate is obtained after ball milling.

[0041] S2, 950 g of the pretreated calcium carbonate in step S1 is added into 10 L of an ethanol aqueous solution (the volume ratio of ethanol to water is 7.5:2.5), then 100 g of γ-mercaptopropyltrimethoxysilane is added, stirring and reaction are performed at 65℃ for 5 h, and then mercapto calcium carbonate is obtained after filtration, washing, and drying.

[0042] S3, 950 g of the mercapto calcium carbonate in step S2 is added into 10 L of DMF, then 120 g of 2,4,5-trimethoxycinnamic acid and 2.5 g of azobisisobutyronitrile are added, reaction is performed at 75℃ for 3.5 h, and then organic calcium carbonate is obtained after filtration, washing, and drying.

[0043] S4, 950g of the organicized calcium carbonate in step S3 is added into 10L of DMF, then 100g of 1-(10-hydroxydecyl)imidazole, 4g of DMAP, 150g of DCC are added, and constant temperature reaction is carried out at 27℃ for 14h, after the reaction is completed, filtration, washing and drying are carried out, and the modified calcium carbonate is obtained.

[0044] A preparation method of an anti-aging high-toughness edge strip material, comprising the following steps:

[0045] The raw materials are weighed according to the formula, the PVC resin, chlorinated polyethylene, stabilizer, modified calcium carbonate, stearic acid, PE wax, palm oil, titanium white powder and color powder are mixed in a high-speed mixer for 4min at a speed of 700r / min, and then the mixed material is put into a double-screw extruder for up-extrusion molding, the first section is 145℃, the second section is 155℃, the third section is 160℃, the fourth section is 165℃, and the mold temperature is 165℃, and the anti-aging high-toughness edge strip material is obtained. Example 2

[0046] An anti-aging high-toughness edge strip material, comprising the following raw materials in parts by weight:

[0047] PVC resin 100 parts, chlorinated polyethylene 8 parts, modified calcium carbonate 25 parts, dioctyl adipate 20 parts, stearic acid 0.6 parts, PE wax 0.5 parts, calcium-zinc composite stabilizer 4 parts, palm oil 0.3 parts, titanium white powder R-996 3 parts, and color powder 0.1 part.

[0048] The preparation method of the modified calcium carbonate comprises the following steps:

[0049] S1, 1kg of calcium carbonate is added into 5kg of dilute acetic acid with a mass concentration of 0.3%, surface etching is carried out at 25℃ for 5min, after etching is completed, washing is carried out until neutral, drying is carried out, then 950g of solid product and 50g of triethanolamine are added into a ball mill, ball milling is carried out at a speed of 1000r / min for 15min, and pretreated calcium carbonate is obtained after ball milling is completed;

[0050] S2, 900g of the pretreated calcium carbonate in step S1 is added into 10L of an ethanol aqueous solution (the volume ratio of ethanol to water is 7:3), then 80g of γ-mercaptopropyltrimethoxysilane is added, stirring reaction is carried out at 60℃ for 6h, after the reaction is completed, filtration, washing and drying are carried out, and mercapto calcium carbonate is obtained;

[0051] S3, 900g of the mercapto calcium carbonate in step S2 is added into 10L of DMF, then 95g of 2,4,5-trimethoxycinnamic acid and 2g of azobisisobutyronitrile are added, and reaction is carried out at 70℃ for 4h, after the reaction is completed, filtration, washing and drying are carried out, and organicized calcium carbonate is obtained.

[0052] S4, 900g of the organic modified calcium carbonate in step S3 is added into 10L of DMF, then 80g of 1-(10-hydroxydecyl)imidazole, 3g of DMAP, and 120g of DCC are added, and the reaction is carried out at 25℃ for 16h, after the reaction is completed, the product is filtered, washed, and dried to obtain the modified calcium carbonate.

[0053] A preparation method of an anti-aging high-toughness edge strip material, comprising the following steps:

[0054] The raw materials are weighed according to the formula, the PVC resin, chlorinated polyethylene, stabilizer, modified calcium carbonate, stearic acid, PE wax, palm oil, titanium white powder, and color powder are mixed in a high-speed mixer for 3min at a speed of 600r / min, and then the mixture is put into a double-screw extruder for up-extrusion molding, the first section is 145℃, the second section is 155℃, the third section is 160℃, the fourth section is 165℃, and the mold temperature is 165℃, and the anti-aging high-toughness edge strip material is obtained. Example 3

[0055] An anti-aging high-toughness edge strip material, comprising the following raw materials in parts by weight:

[0056] PVC resin 100 parts, chlorinated polyethylene 12 parts, modified calcium carbonate 35 parts, tributyl citrate 30 parts, stearic acid 1 part, PE wax 0.8 parts, calcium-zinc composite stabilizer 6 parts, palm oil 0.6 parts, titanium white powder R-996 5 parts, and color powder 0.15 parts.

[0057] The preparation method of the modified calcium carbonate comprises the following steps:

[0058] S1, 1kg of calcium carbonate is added into 5kg of dilute acetic acid with a mass concentration of 0.5%, and surface etching is carried out at 20℃ for 3min, after the etching is completed, the product is washed to neutral, dried, then 970g of the solid product and 30g of triethanolamine are added into a ball mill for ball milling, the speed of the ball milling is 1500r / min, and the time is 10min, and the pretreated calcium carbonate is obtained after the ball milling is completed;

[0059] S2, 1000g of the pretreated calcium carbonate in step S1 is added into 10L of an ethanol aqueous solution (the volume ratio of ethanol to water is 8:2), then 120g of γ-mercaptopropyltrimethoxysilane is added, and the reaction is carried out at 70℃ for 4h, after the reaction is completed, the product is filtered, washed, and dried to obtain the mercapto-modified calcium carbonate;

[0060] S3, 1000g of the mercapto calcium carbonate in step S2 is added into 10L of DMF, then 145g of 2,4,5-trimethoxycinnamic acid, 3g of azobisisobutyronitrile is added, and reacted at 80℃ for 3h, after the reaction is completed, it is filtered, washed and dried to obtain the organic modified calcium carbonate;

[0061] S4, 1000g of the organic modified calcium carbonate in step S3 is added into 10L of DMF, then 120g of 1-(10-hydroxydecyl)imidazole, 5g of DMAP, 180g of DCC is added, and reacted at 30℃ for 12h, after the reaction is completed, it is filtered, washed and dried to obtain the modified calcium carbonate.

[0062] A preparation method of an anti-aging high-toughness edge strip material, comprising the following steps:

[0063] The raw materials are weighed according to the formula, the PVC resin, chlorinated polyethylene, stabilizer, modified calcium carbonate, stearic acid, PE wax, palm oil, titanium white powder and color powder are mixed in a high-speed mixer for 5min at a speed of 800r / min, and then the mixture is put into a double-screw extruder for upper extrusion molding, the first section is 145℃, the second section is 155℃, the third section is 160℃, the fourth section is 165℃, and the mold temperature is 165℃. Comparative example 1

[0064] An anti-aging high-toughness edge strip material, comprising the following raw materials in parts by weight:

[0065] PVC resin 100 parts, chlorinated polyethylene 10 parts, modified calcium carbonate 30 parts, dioctyl terephthalate 25 parts, stearic acid 0.8 parts, PE wax 0.7 parts, calcium-zinc composite stabilizer 5 parts, palm oil 0.5 parts, titanium white powder R-996 4 parts, and color powder 0.13 parts.

[0066] The preparation method of the modified calcium carbonate comprises the following steps:

[0067] S1, 1kg of calcium carbonate is added into 5kg of dilute acetic acid with a mass concentration of 0.4%, and surface etching is carried out at 23℃ for 4min, after the etching is completed, it is washed to neutral, dried, then 960g of solid product and 40g of triethanolamine are added into a ball mill for ball milling, the speed of the ball milling is 1300r / min, and the time is 12min, after the ball milling is completed, pretreated calcium carbonate is obtained;

[0068] S2, 950g of the pretreated calcium carbonate in step S1 is added into 10L of ethanol aqueous solution (the volume ratio of ethanol to water is 7.5:2.5), then 100g of γ-mercaptopropyltrimethoxysilane is added, and stirred and reacted at 65℃ for 5h, after the reaction is completed, it is filtered, washed and dried to obtain mercapto calcium carbonate;

[0069] S3, 950 g of the mercapto-modified calcium carbonate, 120 g of 2,4,5-trimethoxycinnamic acid, and 100 g of 1-(10-hydroxydecyl)imidazole in step S2 are uniformly mixed to obtain the modified calcium carbonate.

[0070] A preparation method of an anti-aging high-toughness edge strip material, comprising the following steps:

[0071] The raw materials are weighed according to the formula, the PVC resin, chlorinated polyethylene, stabilizer, modified calcium carbonate, stearic acid, PE wax, palm oil, titanium white powder, and color powder are mixed in a high-speed mixer for 4 min at a speed of 700 r / min, and then the mixture is poured into a double-screw extruder for up-extrusion molding, the first section is 145℃, the second section is 155℃, the third section is 160℃, the fourth section is 165℃, and the mold temperature is 165℃.

[0072] Compared with Example 1, the modified calcium carbonate in the present comparative example is obtained by physically blending mercapto-modified calcium carbonate, 2,4,5-trimethoxycinnamic acid, and 1-(10-hydroxydecyl)imidazole. Comparative Example 2

[0073] An anti-aging high-toughness edge strip material, comprising the following raw materials in parts by weight:

[0074] PVC resin 100 parts, chlorinated polyethylene 10 parts, modified calcium carbonate 30 parts, dioctyl terephthalate 25 parts, stearic acid 0.8 parts, PE wax 0.7 parts, calcium-zinc composite stabilizer 5 parts, palm oil 0.5 parts, titanium white powder R-996 4 parts, and color powder 0.13 parts.

[0075] The preparation method of the modified calcium carbonate comprises the following steps:

[0076] S1, 1 kg of calcium carbonate is added to 5 kg of dilute acetic acid with a mass concentration of 0.4%, and surface etching is performed at 23℃ for 4 min, then washed to neutral, dried, and then 960 g of solid product and 40 g of triethanolamine are added to a ball mill for ball milling at a speed of 1300 r / min for 12 min, and then a pretreated calcium carbonate is obtained;

[0077] S2, 950 g of the pretreated calcium carbonate in step S1 is added to 10 L of an ethanol aqueous solution (the volume ratio of ethanol to water is 7.5:2.5), then 100 g of γ-mercaptopropyltrimethoxysilane is added, and stirring and reaction are performed at 65℃ for 5 h, then filtered, washed, and dried to obtain mercapto-modified calcium carbonate;

[0078] S3, 950 g of the mercapto calcium carbonate in step S2 is added into 10 L of DMF, then 120 g of 2,4,5-trimethoxycinnamic acid, 2.5 g of azobisisobutyronitrile is added, and reacted at 75℃ for 3.5 h. After the reaction is completed, it is filtered, washed, and dried to obtain the modified calcium carbonate.

[0079] A preparation method of an anti-aging high-toughness edge strip material, comprising the following steps:

[0080] The raw materials are weighed according to the formula, the PVC resin, chlorinated polyethylene, stabilizer, modified calcium carbonate, stearic acid, PE wax, palm oil, titanium white powder, and color powder are mixed in a high-speed mixer for 4 min at a speed of 700 r / min, and then the mixture is put into a double-screw extruder for up-extrusion molding, the first section is 145℃, the second section is 155℃, the third section is 160℃, the fourth section is 165℃, and the mold temperature is 165℃.

[0081] Compared with Example 1, the modified calcium carbonate in the present comparative example does not introduce 1-(10-hydroxydecyl) imidazole. Comparative Example 3

[0082] An anti-aging high-toughness edge strip material, comprising the following raw materials in parts by weight:

[0083] PVC resin 100 parts, chlorinated polyethylene 10 parts, modified calcium carbonate 30 parts, dioctyl terephthalate 25 parts, stearic acid 0.8 parts, PE wax 0.7 parts, calcium-zinc composite stabilizer 5 parts, palm oil 0.5 parts, titanium white powder R-996 4 parts, and color powder 0.13 parts.

[0084] The preparation method of the modified calcium carbonate comprises the following steps:

[0085] S1, 1 kg of calcium carbonate is added into 5 kg of dilute acetic acid with a mass concentration of 0.4%, and surface etching is carried out at 23℃ for 4 min. After etching is completed, it is washed to neutral, dried, then 960 g of solid product and 40 g of triethanolamine are added into a ball mill for ball milling, the speed of ball milling is 1300 r / min, and the time is 12 min. After ball milling is completed, pretreated calcium carbonate is obtained;

[0086] S2, 950 g of the pretreated calcium carbonate in step S1 is added into 10 L of an ethanol aqueous solution (the volume ratio of ethanol to water is 7.5:2.5), then 100 g of γ-(2,3-epoxypropoxy) propyl trimethoxysilane is added, and stirred and reacted at 65℃ for 5 h. After the reaction is completed, it is filtered, washed, and dried to obtain the epoxidized calcium carbonate;

[0087] S3, 950 g of the epoxidized calcium carbonate in 10 L of DMF in step S2 was added with 100 g of 1-(10-hydroxydecyl)imidazole, 20 g of triethylamine, and then the mixture was reacted at 60°C for 5 h. After the reaction was completed, the mixture was filtered, washed, and dried to obtain the modified calcium carbonate.

[0088] A preparation method of an anti-aging high-toughness edge strip material, comprising the following steps:

[0089] The raw materials were weighed according to the formula, and the PVC resin, chlorinated polyethylene, stabilizer, modified calcium carbonate, stearic acid, PE wax, palm oil, titanium dioxide, and color powder were mixed in a high-speed mixer for 4 min at a speed of 700 r / min. Then the mixture was fed into a twin-screw extruder for up-extrusion molding, with the first, second, third, and fourth sections being at 145°C, 155°C, 160°C, and 165°C, respectively, and the mold temperature being 165°C. Thus, the anti-aging high-toughness edge strip material was obtained.

[0090] In comparison with Example 1, the modified calcium carbonate of the present comparative example does not introduce 2,4,5-trimethoxycinnamic acid.

[0091] The anti-aging high-toughness edge strip materials prepared in Examples 1-3 and Comparative Examples 1-3 were prepared into sample strips, and their properties were tested. The tensile strength and elongation at break were tested according to the standard GB / T 1040.2-2022 “Determination of tensile properties of plastics Part 2: test conditions for moulded and extruded plastics”. The sample strip was a 1BA type sample strip with a total length of 80 mm, a gauge length (measurement section) of 25 mm, a measurement section width of 4 mm, and a thickness of 2 mm. The tensile rate was 50 mm / min. The impact strength was tested according to the standard GB / T1043.1-2008 “Determination of plastics Charpy impact properties Part 1: non-instrumented impact test”. The sample strip size was 80 mm in length, 10 mm in width, and 4 mm in thickness. The notch bottom radius of curvature was 0.25 mm, the notch depth was 0.8 mm, and the remaining thickness was 3.2 mm. The aging test was conducted according to the standard GB / T 16422.2 “Plastics Laboratory light source exposure test method Part 2: xenon arc lamp”. The artificial accelerated aging test was conducted under the following conditions: using a daylight filter, the irradiation intensity at 340 nm was constant at 600 mW / (m²), the blackboard temperature was 65°C, and the cycle mode was 102 min of light irradiation and 18 min of light irradiation with water spraying. The total aging time was 500 h. The test results are shown in Table 1.

[0092] Table 1

[0093] Tensile strength (MPa) Elongation at break (%) Impact strength (kJ / m2) Tensile strength retention after aging (%) Impact strength retention after aging (%) Example 1 29.5 214 22.6 93.5 91.7 Example 2 31.8 185 20.4 89.6 88.3 Example 3 28.9 228 23.1 92.1 90.4 Comparative Example 1 28.2 146 11.8 66.4 54.5 Comparative Example 2 33.7 52.4 7.5 70.3 58.6 Comparative Example 3 26.8 205 17.2 62.3 51.2

[0094] As can be seen from Table 1, the anti-aging high-toughness edge strip material prepared by the application has excellent mechanical properties, meanwhile has excellent weather resistance and dimensional stability, and has good application prospect.

[0095] The above is a further detailed description of the application in combination with specific implementation examples, and cannot be deemed as limiting the specific implementation of the application to these descriptions. For ordinary skilled persons in the technical field of the application, some simple deductions or replacements can be made without departing from the concept of the application, and all of them shall be deemed as falling within the protection scope of the application.

[0096] Those skilled in the art will easily understand that the above description is only the preferred embodiment of the application, and is not intended to limit the application, and any modification, equivalent replacement and improvement made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. An anti-aging high tenacity edge strip material, characterized in that, By weight parts, including the following raw materials: PVC resin 100 parts, chlorinated polyethylene 8-12 parts, modified calcium carbonate 25-35 parts, plasticizer 20-30 parts, stearic acid 0.6-1 part, PE wax 0.5-0.8 part, stabilizer 4-6 parts, palm oil 0.3-0.6 parts, titanium dioxide 3-5 parts, color powder 0.1-0.15 parts; The preparation method of the modified calcium carbonate comprises the following steps: S1, calcium carbonate is added to dilute acetic acid for surface etching, and after etching, it is washed to neutral, dried, and then the solid product and triethanolamine are added to a ball mill for ball milling, and after ball milling, pretreated calcium carbonate is obtained; S2, the pretreated calcium carbonate is added to an ethanol aqueous solution, then γ-mercaptopropyltrimethoxysilane is added, and stirring reaction is carried out, and after reaction, mercapto calcium carbonate is obtained; S3, the mercapto calcium carbonate is added to DMF, then 2,4,5-trimethoxycinnamic acid and azobisisobutyronitrile are added, and heating reaction is carried out, and after reaction, organic calcium carbonate is obtained; S4, the organic calcium carbonate is added to DMF, then 1-(10-hydroxydecyl) imidazole, DMAP and DCC are added, and constant temperature reaction is carried out, and after reaction, the modified calcium carbonate is obtained; In step S1, the mass concentration of the dilute acetic acid is 0.3-0.5%, the etching temperature is 20-25℃, and the time is 3-5min; the mass ratio of the solid product to triethanolamine is 95-97:3-5, the rotation speed of the ball milling is 1000-1500r / min, and the time is 10-15min; in step S2, the volume ratio of ethanol to water in the ethanol aqueous solution is 7-8:2-3, the mass ratio of the pretreated calcium carbonate to γ-mercaptopropyltrimethoxysilane is 90-100:8-12, the stirring reaction temperature is 60-70℃, and the time is 4-6h; in step S3, the mass ratio of the mercapto calcium carbonate to 2,4,5-trimethoxycinnamic acid to azobisisobutyronitrile is 90-100:9.5-14.5:0.2-0.3, the heating reaction temperature is 70-80℃, and the time is 3-4h; in step S4, the mass ratio of the organic calcium carbonate to 1-(10-hydroxydecyl) imidazole to DMAP to DCC is 90-100:8-12:0.3-0.5:12-18, and the constant temperature reaction temperature is 25-30℃, and the time is 12-16h.

2. The anti-aging high flexibility edge strip material according to claim 1, characterized in that, By weight parts, including the following raw materials: PVC resin 100 parts, chlorinated polyethylene 9-11 parts, modified calcium carbonate 30-35 parts, plasticizer 25-30 parts, stearic acid 0.8-1 part, PE wax 0.6-0.7 part, stabilizer 5-6 parts, palm oil 0.4-0.5 parts, titanium dioxide 3-4 parts, color powder 0.1-0.15 parts.

3. The anti-aging high flexibility edge strip material according to claim 1, wherein, The stabilizer is a calcium-zinc composite stabilizer, the titanium dioxide is R-996, and the plasticizer is one or more of dioctyl terephthalate, dioctyl adipate and tributyl citrate.

4. A process for the preparation of an anti-aging high-ductility edge strip material according to any one of claims 1 to 3, characterized in that, The method comprises the following steps: Take the raw materials according to the formula, mix the PVC resin, chlorinated polyethylene, stabilizer in a high-speed mixer, then add modified calcium carbonate, plasticizer, stearic acid, PE wax, palm oil, titanium dioxide, color powder, continue to mix for 5-8 min, put the mixture into a double screw extruder for up-extrusion molding, and the product is obtained.

5. The preparation method according to claim 4, characterized in that, The rotation speed of the high-speed mixer is 600-800 r / min, and the mixing time is 3-5 min, and the process of the extrusion molding is as follows: the first section is 140-150 ℃, the second section is 150-160 ℃, the third section is 155-165 ℃, the fourth section is 160-170 ℃, and the mold temperature is 160-170 ℃.

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