Anti-aging PVC wire duct and preparation method thereof

Abstract

The invention belongs to the technical field of polyvinyl chloride, and particularly relates to an anti-aging PVC wire duct and a preparation method thereof. The anti-aging PVC trunking is prepared from the following raw materials in parts by weight: 100 parts of polyvinyl chloride resin, 7-13 parts of a toughening agent, 0.7-1.7 parts of maleic anhydride grafted polyethylene, 2.5-3.5 parts of a heat stabilizer, 13-19 parts of a plasticizer and 7-11 parts of an anti-aging agent including 4, 4 '-diphenylmethane diisocyanate. The enhanced filler is prepared from 2, 4 '-dicyclohexylmethane diisocyanate, polyethylene glycol, polysorbate 80, calcium carbonate, butyl methoxy dibenzoylmethane, polytetrafluoroethylene and the like. According to the anti-aging PVC trunking provided by the invention, the anti-aging performance of the obtained PVC trunking in a specific application scene is improved to a certain extent through a synergistic effect of the enhanced filler and other components, so that the PVC trunking provided by the invention is more suitable for being used for a long time in a kitchen and other working scenes with more lampblack.

Description

Technical Field

[0001] The present application belongs to the technical field of polyvinyl chloride, and specifically relates to an aging-resistant PVC cable trunking and a preparation method thereof. Background Art

[0002] Polyvinyl chloride (PVC) is a highly produced polymer plastic with excellent mechanical strength, wear resistance, and dielectric properties. It is widely used in pipes, wire and cable, packaging, and building materials. However, traditional PVC materials have poor oil resistance. When used in kitchens and other facilities where PVC trunking is widely used, PVC is prone to brittleness and aging in high-temperature and high-oil conditions. This severely limits its practical application, necessitating specialized modification to make it more suitable for specific food processing applications.

[0003] In traditional technology, fillers are often added to improve its oil resistance and high temperature resistance. However, in this case, the PVC cable trunking made of traditional polyvinyl chloride materials still has problems such as plasticizer failure when used in high temperature and high oil environments, which makes the traditional PVC cable trunking brittle or even damaged, which seriously affects electrical safety and poses a huge safety hazard.

[0004] Therefore, it is necessary to provide a specific aging-resistant PVC trunking and a preparation method thereof to solve the problems existing in the traditional technology. Summary of the Invention

[0005] The purpose of this application is to address the deficiencies of the prior art and provide an aging-resistant PVC trunking and a preparation method thereof, specifically adopting the following technical solutions: First, the present application provides an aging-resistant PVC trunking, the raw materials of which include, by weight: 100 parts of polyvinyl chloride resin, 7-13 parts of toughening agent, 0.7-1.7 parts of maleic anhydride grafted polyethylene, 2.5-3.5 parts of heat stabilizer, 13-19 parts of plasticizer, and 7-11 parts of reinforcing filler; The preparation method of the reinforced filler comprises the following steps: The reinforcing core agent and 4,4'-dicyclohexylmethane diisocyanate are prepared as an oil phase, and polysorbate 80 is prepared as an aqueous phase. The oil phase and the aqueous phase are mixed and emulsified to prepare an emulsion, and then polyethylene glycol and triethylamine are added and reacted at 75°C-90°C for 2h-5h; The preparation method of the reinforcing core agent comprises the following steps: Calcium carbonate, butyl methoxydibenzoylmethane and polytetrafluoroethylene are blended and modified.

[0006] In the present application, a reinforcing filler prepared in a specific manner is added. In the preparation process of the reinforcing filler, a reinforcing core agent and 4,4'-dicyclohexylmethane diisocyanate are prepared as an oil phase with reference to the interfacial polymerization method, and polysorbate 80 is prepared as an aqueous phase. The oil phase and the aqueous phase are mixed and emulsified to prepare an emulsion, and then polyethylene glycol and triethylamine are added to prepare a reinforcing core agent (wherein 4,4'-dicyclohexylmethane diisocyanate, polysorbate 80, and polysorbate 80) wrapped in a special polyurethane outer film. Ester 80, polyethylene glycol and triethylamine are all raw materials for preparing the polyurethane outer film), so that the reinforcing core agent inside the reinforced filler can maintain relatively excellent compatibility in the PVC material, avoiding the problems of precipitation and agglomeration of the reinforcing core agent in the PVC material, and allowing the specific blended and modified calcium carbonate, butyl methoxydibenzoylmethane and polytetrafluoroethylene inside to play their role to the greatest extent, thereby greatly improving the comprehensive performance of the aging-resistant PVC trunking provided by the present application.

[0007] In some specific implementations, the mass ratio of calcium carbonate, butyl methoxydibenzoylmethane, and polytetrafluoroethylene is (6-11):(13-17):(20-30). This specific mass ratio of each material in the reinforced filler contributes to specific performance while maintaining certain economic efficiency, thereby enhancing the overall competitiveness of the aging-resistant PVC cable trunking provided herein.

[0008] In some specific implementations, the mass ratio of 4,4'-dicyclohexylmethane diisocyanate, polyethylene glycol, and triethylamine is (21-29):(60-80):(2-3); and the mass ratio of the reinforcing agent to 4,4'-dicyclohexylmethane diisocyanate is (2.7-3.5):(0.8-1.2). Specific ratios contribute to more reliable performance. In some cases, the polyethylene glycol can be polyethylene glycol 2000 or polyethylene glycol 3000, or a mixture of the two.

[0009] In some specific implementations, the plasticizer includes at least one of trioctyl trimellitate and dioctyl terephthalate; the heat stabilizer is a calcium zinc stabilizer; and the toughening agent includes an ACR toughening agent. Specific plasticizers can effectively improve the overall performance of the aging-resistant PVC trunking provided herein; while common calcium zinc stabilizers can provide the desired performance of the aging-resistant PVC trunking provided herein.

[0010] In some specific implementations, the raw materials include 100 parts polyvinyl chloride resin, 10 parts toughening agent, 1.6 parts maleic anhydride-grafted polyethylene, 3 parts thermal stabilizer, 15 parts plasticizer, and 11 parts reinforcing filler. A relatively balanced combination of components yields reliable performance.

[0011] Secondly, the present application also provides a preparation method of the aging-resistant PVC cable trunking, comprising the following steps: mixing polyvinyl chloride resin, toughening agent, maleic anhydride grafted polyethylene, heat stabilizer, plasticizer and reinforcing filler, plasticizing for 5 minutes to 7 minutes, and then discharging and molding.

[0012] In some specific implementations, the plasticizing temperature is 170° C.-200° C. The aging-resistant PVC trunking produced at a specific temperature has certain performance advantages.

[0013] The beneficial effect of the present application is that the aging-resistant PVC cable trunking provided by the present application has a synergistic effect with the reinforced filler and other components, so that the aging resistance of the obtained PVC cable trunking in specific application scenarios is improved to a certain extent, thereby making the PVC cable trunking provided by the present application more suitable for long-term use in working scenarios with a lot of oil smoke, such as kitchens. DETAILED DESCRIPTION

[0014] The following will be combined with the embodiments to clearly and completely describe the concept and technical effects of this application so that you can fully understand the purpose, scheme and effects of this application. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict.

[0015] Example 1 First, this embodiment provides an aging-resistant PVC trunking, the raw materials of which include, by weight: 100 parts of polyvinyl chloride resin, 10 parts of ACR toughening agent, 1.6 parts of maleic anhydride grafted polyethylene, 3 parts of calcium zinc stabilizer, 15 parts of trioctyl trimellitate, and 11 parts of reinforcing filler; Among them, the specific preparation method of the reinforced filler includes the following steps: adding 26 parts of polytetrafluoroethylene powder, 9 parts of calcium carbonate powder, 15 parts of butyl methoxydibenzoylmethane powder and 2 parts of KH-550 silane coupling agent into an internal mixer, and blending and modifying them at 270°C to obtain a reinforcing core agent; then taking 3 parts of the reinforcing core agent powder, and preparing them with 1 part of 4,4'-dicyclohexylmethane diisocyanate as an oil phase, and preparing 1 part of polysorbate 80 as an aqueous phase, and then slowly adding the oil phase dropwise into the aqueous phase, and stirring thoroughly to obtain an emulsion, and then slowly adding polyethylene glycol 2000 and triethylamine to the emulsion, wherein the mass ratio of 4,4'-dicyclohexylmethane diisocyanate, polyethylene glycol 2000 and triethylamine is 26:60:2, heating to 80°C, and reacting for 4 hours.

[0016] Secondly, this embodiment also provides a method for preparing the above-mentioned aging-resistant PVC trunking, comprising the following steps: The above-mentioned polyvinyl chloride resin, ACR toughening agent, maleic anhydride grafted polyethylene, calcium zinc stabilizer, trioctyl trimellitate, and reinforcing filler are mixed and added to a double-roll mill, plasticized at 200° C. for 7 minutes, and then discharged and formed to obtain the aging-resistant PVC trunking provided in this embodiment.

[0017] Example 2 First, this embodiment provides an aging-resistant PVC trunking, the raw materials of which include, by weight: 100 parts of polyvinyl chloride resin, 10 parts of ACR toughening agent, 1.6 parts of maleic anhydride grafted polyethylene, 3 parts of calcium zinc stabilizer, 15 parts of dioctyl terephthalate, and 11 parts of reinforcing filler; Among them, the specific preparation method of the reinforced filler includes the following steps: adding 26 parts of polytetrafluoroethylene powder, 9 parts of calcium carbonate powder, 15 parts of butyl methoxydibenzoylmethane powder and 2 parts of KH-550 silane coupling agent into an internal mixer, and blending and modifying them at 270°C to obtain a reinforcing core agent; then taking 3 parts of the reinforcing core agent powder, and preparing them with 1 part of 4,4'-dicyclohexylmethane diisocyanate as an oil phase, and preparing 1 part of polysorbate 80 as an aqueous phase, and then slowly adding the oil phase dropwise into the aqueous phase, and stirring thoroughly to obtain an emulsion, and then slowly adding polyethylene glycol 2000 and triethylamine to the emulsion, wherein the mass ratio of 4,4'-dicyclohexylmethane diisocyanate, polyethylene glycol 2000 and triethylamine is 26:60:2, heating to 80°C, and reacting for 4 hours.

[0018] Secondly, this embodiment also provides a method for preparing the above-mentioned aging-resistant PVC trunking, comprising the following steps: The above-mentioned polyvinyl chloride resin, ACR toughening agent, maleic anhydride grafted polyethylene, calcium zinc stabilizer, dioctyl terephthalate, and reinforcing filler are mixed and added to a double-roll mill, plasticized at 200°C for 7 minutes, and then discharged and formed to obtain the aging-resistant PVC trunking provided in this embodiment.

[0019] Example 3 First, this embodiment provides an aging-resistant PVC trunking, the raw materials of which include, by weight: 100 parts of polyvinyl chloride resin, 10 parts of ACR toughening agent, 1.6 parts of maleic anhydride grafted polyethylene, 3 parts of calcium zinc stabilizer, 15 parts of trioctyl trimellitate, and 7 parts of reinforcing filler; Among them, the specific preparation method of the reinforced filler includes the following steps: adding 26 parts of polytetrafluoroethylene powder, 9 parts of calcium carbonate powder, 15 parts of butyl methoxydibenzoylmethane powder and 2 parts of KH-550 silane coupling agent into an internal mixer, and blending and modifying them at 270°C to obtain a reinforcing core agent; then taking 3 parts of the reinforcing core agent powder, and preparing them with 1 part of 4,4'-dicyclohexylmethane diisocyanate as an oil phase, and preparing 1 part of polysorbate 80 as an aqueous phase, and then slowly adding the oil phase dropwise into the aqueous phase, and stirring thoroughly to obtain an emulsion, and then slowly adding polyethylene glycol 2000 and triethylamine to the emulsion, wherein the mass ratio of 4,4'-dicyclohexylmethane diisocyanate, polyethylene glycol 2000 and triethylamine is 26:60:2, heating to 80°C, and reacting for 4 hours.

[0020] Secondly, this embodiment also provides a method for preparing the above-mentioned aging-resistant PVC trunking, comprising the following steps: The above-mentioned polyvinyl chloride resin, ACR toughening agent, maleic anhydride grafted polyethylene, calcium zinc stabilizer, trioctyl trimellitate, and reinforcing filler are mixed and added to a double-roll mill, plasticized at 200° C. for 7 minutes, and then discharged and formed to obtain the aging-resistant PVC trunking provided in this embodiment.

[0021] Example 4 First, this embodiment provides an aging-resistant PVC trunking, the raw materials of which include, by weight: 100 parts of polyvinyl chloride resin, 12 parts of ACR toughening agent, 1.4 parts of maleic anhydride grafted polyethylene, 3 parts of calcium zinc stabilizer, 15 parts of trioctyl trimellitate, and 10 parts of reinforcing filler; Among them, the specific preparation method of the reinforced filler includes the following steps: adding 30 parts of polytetrafluoroethylene powder, 6 parts of calcium carbonate powder, 13 parts of butyl methoxydibenzoylmethane powder and 2 parts of KH-550 silane coupling agent into an internal mixer, and blending and modifying them at 270°C to obtain a reinforcing core agent; then taking 3 parts of the reinforcing core agent powder, and preparing them with 1 part of 4,4'-dicyclohexylmethane diisocyanate as an oil phase, and preparing 1 part of polysorbate 80 as an aqueous phase, and then slowly adding the oil phase into the aqueous phase and stirring thoroughly to obtain an emulsion, and then slowly adding polyethylene glycol 2000 and triethylamine to the emulsion, wherein the mass ratio of 4,4'-dicyclohexylmethane diisocyanate, polyethylene glycol 2000 and triethylamine is 26:60:2, heating to 80°C, and reacting for 4 hours.

[0022] Secondly, this embodiment also provides a method for preparing the above-mentioned aging-resistant PVC trunking, comprising the following steps: The above-mentioned polyvinyl chloride resin, ACR toughening agent, maleic anhydride grafted polyethylene, calcium zinc stabilizer, trioctyl trimellitate, and reinforcing filler are mixed and added to a double-roll mill, plasticized at 200° C. for 7 minutes, and then discharged and formed to obtain the aging-resistant PVC trunking provided in this embodiment.

[0023] Example 5 First, this embodiment provides an aging-resistant PVC trunking, the raw materials of which include, by weight: 100 parts of polyvinyl chloride resin, 10 parts of ACR toughening agent, 1.6 parts of maleic anhydride grafted polyethylene, 3 parts of calcium zinc stabilizer, 15 parts of trioctyl trimellitate, and 11 parts of reinforcing filler; Among them, the specific preparation method of the reinforced filler includes the following steps: adding 20 parts of polytetrafluoroethylene powder, 11 parts of calcium carbonate powder, 17 parts of butyl methoxydibenzoylmethane powder and 2 parts of KH-550 silane coupling agent into an internal mixer, and blending and modifying them at 270°C to obtain a reinforcing core agent; then taking 3 parts of the reinforcing core agent powder, and preparing them with 1 part of 4,4'-dicyclohexylmethane diisocyanate as an oil phase, and preparing 1 part of polysorbate 80 as an aqueous phase, and then slowly adding the oil phase dropwise into the aqueous phase, and stirring thoroughly to obtain an emulsion, and then slowly adding polyethylene glycol 2000 and triethylamine to the emulsion, wherein the mass ratio of 4,4'-dicyclohexylmethane diisocyanate, polyethylene glycol 2000 and triethylamine is 26:60:2, heating to 80°C, and reacting for 4 hours.

[0024] Secondly, this embodiment also provides a method for preparing the above-mentioned aging-resistant PVC trunking, comprising the following steps: The above-mentioned polyvinyl chloride resin, ACR toughening agent, maleic anhydride grafted polyethylene, calcium zinc stabilizer, trioctyl trimellitate, and reinforcing filler are mixed and added to a double-roll mill, plasticized at 200° C. for 7 minutes, and then discharged and formed to obtain the aging-resistant PVC trunking provided in this embodiment.

[0025] Comparative Example 1 First, this comparative example provides a PVC trunking, which comprises, by weight, 100 parts of polyvinyl chloride resin, 10 parts of ACR toughening agent, 1.6 parts of maleic anhydride grafted polyethylene, 3 parts of calcium zinc stabilizer, 15 parts of trioctyl trimellitate, and 11 parts of calcium carbonate filler; Secondly, this comparative example also provides a method for preparing the above-mentioned PVC trunking, comprising the following steps: The above-mentioned polyvinyl chloride resin, ACR toughening agent, maleic anhydride grafted polyethylene, calcium zinc stabilizer, trioctyl trimellitate, and calcium carbonate filler are mixed and added into a double-roll mill, plasticated at 200° C. for 7 minutes, and then discharged and formed to obtain the PVC cable trunking provided in this comparative example.

[0026] Comparative Example 2 First, this comparative example provides a PVC trunking, which includes, by weight, 100 parts of polyvinyl chloride resin, 10 parts of ACR toughening agent, 1.6 parts of maleic anhydride grafted polyethylene, 3 parts of calcium zinc stabilizer, 15 parts of trioctyl trimellitate, and 11 parts of polytetrafluoroethylene filler; Secondly, this comparative example also provides a method for preparing the above-mentioned PVC trunking, comprising the following steps: The above-mentioned polyvinyl chloride resin, ACR toughening agent, maleic anhydride grafted polyethylene, calcium zinc stabilizer, trioctyl trimellitate, and polytetrafluoroethylene filler are mixed and added into a double-roll mill, plasticated at 200°C for 7 minutes, and then discharged and formed to obtain the PVC cable trunking provided in this comparative example.

[0027] Comparative Example 3 First, this comparative example provides a PVC trunking, which comprises, by weight, 100 parts of polyvinyl chloride resin, 10 parts of ACR toughening agent, 1.6 parts of maleic anhydride grafted polyethylene, 3 parts of calcium zinc stabilizer, 15 parts of trioctyl trimellitate, and 11 parts of filler; The specific preparation method of the filler is as follows: 26 parts of polytetrafluoroethylene powder, 9 parts of calcium carbonate powder, 15 parts of butyl methoxydibenzoylmethane powder and 2 parts of KH-550 silane coupling agent are added into an internal mixer, and blended and modified at 270° C. to obtain the filler.

[0028] Secondly, this comparative example also provides a method for preparing the above-mentioned PVC trunking, comprising the following steps: The above-mentioned polyvinyl chloride resin, ACR toughening agent, maleic anhydride grafted polyethylene, calcium zinc stabilizer, trioctyl trimellitate, and filler are mixed and added into a double-roll mill, plasticated at 200° C. for 7 minutes, and then discharged and formed to obtain the aging-resistant PVC cable trunking provided in this comparative example.

[0029] Comparative Example 4 First, this comparative example provides a PVC trunking, which comprises, by weight, 100 parts of polyvinyl chloride resin, 10 parts of ACR toughening agent, 1.6 parts of maleic anhydride grafted polyethylene, 3 parts of calcium zinc stabilizer, 15 parts of trioctyl trimellitate, and 11 parts of reinforcing filler; Among them, the specific preparation method of the reinforced filler is: 26 parts of polytetrafluoroethylene powder and 2 parts of KH-550 silane coupling agent are added to an internal mixer, and blended and modified at 270°C to obtain a reinforcing core agent; then 3 parts of the reinforcing core agent powder are taken, and prepared with 1 part of 4,4'-dicyclohexylmethane diisocyanate as an oil phase, and 1 part of polysorbate 80 as an aqueous phase, and then the oil phase is slowly added dropwise into the aqueous phase and fully stirred to obtain an emulsion, and then polyethylene glycol 2000 and triethylamine are slowly added to the emulsion, wherein the mass ratio of 4,4'-dicyclohexylmethane diisocyanate, polyethylene glycol 2000 and triethylamine is 26:60:2, heated to 80°C, and reacted for 4 hours.

[0030] Secondly, this comparative example also provides a method for preparing a PVC trunking, comprising the following steps: The above-mentioned polyvinyl chloride resin, ACR toughening agent, maleic anhydride grafted polyethylene, calcium zinc stabilizer, trioctyl trimellitate, and reinforcing filler were mixed and added to a double-roll mill, and plasticized at 200° C. for 7 minutes, and then discharged and formed to obtain the PVC cable trunking provided in this comparative example.

[0031] Performance test The aging-resistant PVC trunkings prepared in the above-mentioned embodiments and the PVC trunkings prepared in the comparative examples were taken as samples and subjected to the following performance tests.

[0032] Initial performance testing: Each sample was taken and tested for hardness according to the relevant requirements of JIS K 7215 standard, and for elongation at break according to the relevant requirements of JIS K 7161 standard. Specific results are shown in Table 1.

[0033] Table 1 Heat resistance test: Each sample was placed in an oven and heated at 70°C for 120 h. The hardness was then tested according to the relevant requirements of JIS K 7215, and the elongation at break was tested according to the relevant requirements of JIS K 7161. The results are shown in Table 2.

[0034] Table 2 Oil resistance test: Each sample was immersed in edible oil at 70°C for 24 h, and then tested for hardness according to the relevant requirements of JIS K 7215 standard, and tested for elongation at break according to the relevant requirements of JIS K 7161 standard. The results are shown in Table 3.

[0035] Table 3 Although the description of the present application has been quite detailed and specifically describes several embodiments, it is not intended to be limited to any of these details or embodiments or any particular embodiment, but should be regarded as providing a broad possible interpretation of these claims by reference to the appended claims in view of the prior art, thereby effectively covering the intended scope of the present application. In addition, the above description of the present application is based on the embodiments foreseeable by the applicant, which is intended to provide a useful description, and those non-substantial changes to the present application that have not yet been foreseen may still represent equivalent changes to the present application.

Claims

1. An aging-resistant PVC trunking, characterized in that: In parts by weight, the raw materials include: 100 parts of polyvinyl chloride resin, 7 parts to 13 parts of toughening agent, 0.7 parts to 1.7 parts of maleic anhydride grafted polyethylene, 2.5 parts to 3.5 parts of heat stabilizer, 13 parts to 19 parts of plasticizer, and 7 parts to 11 parts of reinforcing filler; The preparation method of the reinforced filler comprises the following steps: The reinforcing core agent and 4,4'-dicyclohexylmethane diisocyanate are prepared as an oil phase, and polysorbate 80 is prepared as an aqueous phase. The oil phase and the aqueous phase are mixed and emulsified to prepare an emulsion, and then polyethylene glycol and triethylamine are added and reacted at 75°C-90°C for 2h-5h; The preparation method of the reinforcing core agent comprises the following steps: Calcium carbonate, butyl methoxydibenzoylmethane and polytetrafluoroethylene are blended and modified.

2. The aging-resistant PVC trunking according to claim 1, characterized in that: The plasticizer includes at least one of trioctyl trimellitate and dioctyl terephthalate.

3. The aging-resistant PVC trunking according to claim 1, characterized in that: The mass ratio of the calcium carbonate, the butyl methoxydibenzoylmethane and the polytetrafluoroethylene is (6-11): (13-17): (20-30).

4. The aging-resistant PVC trunking according to claim 1, characterized in that: The heat stabilizer is a calcium zinc stabilizer.

5. The aging-resistant PVC trunking according to claim 1, characterized in that: The mass ratio of the 4,4'-dicyclohexylmethane diisocyanate, the polyethylene glycol and the triethylamine is (21-29): (60-80): (2-3).

6. The aging-resistant PVC trunking according to claim 1, characterized in that: The raw materials include 100 parts of the polyvinyl chloride resin, 10 parts of the toughening agent, 1.6 parts of the maleic anhydride grafted polyethylene, 3 parts of the heat stabilizer, 15 parts of the plasticizer, and 11 parts of the reinforcing filler.

7. The aging-resistant PVC trunking according to claim 1, characterized in that: The mass ratio of the reinforcing core agent to the 4,4'-dicyclohexylmethane diisocyanate is (2.7-3.5): (0.8-1.2).

8. The aging-resistant PVC trunking according to claim 1, characterized in that: The toughening agent includes an ACR toughening agent.

9. The method for preparing an ageing-resistant PVC trunking according to any one of claims 1 to 8, characterized in that: The following steps are involved: The polyvinyl chloride resin, the toughening agent, the maleic anhydride grafted polyethylene, the heat stabilizer, the plasticizer and the reinforcing filler are mixed and plasticized for 5 minutes to 7 minutes, and then discharged and formed.

10. The method for preparing an aging-resistant PVC trunking according to claim 9, characterized in that: The temperature of the plasticizing is 170°C-200°C.

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