Hyperbranched functional aid and high-performance modified CPVC (Chlorinated Polyvinyl Chloride) prepared from same

Abstract

The invention discloses a hyperbranched functional aid and high-performance modified CPVC (chlorinated polyvinyl chloride) prepared from the hyperbranched functional aid. The hyperbranched functional aid comprises the following raw materials: a calcium-zinc complexing agent, zeolite, hydrotalcite, an antioxidant (antioxidant 1010), PE (polyethylene) wax and beta-diketone. The weight ratio of the calcium-zinc complexing agent to the zeolite to the hydrotalcite to the antioxidant to the PE wax to the beta-diketone is 100: (5-5.5): (5-5.5): (1-1.3): (1-1.3): (1-1.3); the calcium-zinc complexing agent is prepared from hyperbranched polysiloxane grafted high-molecular polymer, zinc stearate, calcium stearate, zinc acetylacetonate and epoxidized soybean oil according to the weight ratio of (4 to 6): (20 to 24): (20 to 23): (1 to 1.4): (1 to 1.3). According to the invention, the usage amount of the auxiliary agent can be effectively reduced, and the processing stability and practical performance of CPVC can be greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of polymer material production, and in particular to a hyperbranched functional additive and high-performance modified CPVC prepared therefrom. Background Art

[0002] CPVC, or chlorinated polyvinyl chloride resin, is a product made from PVC (polyvinyl chloride resin) by chlorination reaction. Its chlorine content can be increased from 56.7wt.% of PVC resin to 60wt.%, or even more than 70wt.%. CPVC resin is significantly superior to PVC in terms of mechanical properties, heat resistance, weather resistance, and corrosion resistance. For example, the heat deformation temperature of CPVC is more than 10°C higher than that of PVC resin, and the specific temperature increase increases with the increase of its chlorination degree, which enables it to be used in harsh environments where many materials cannot be used. It has a broad market application prospect and is an important engineering plastic for general plastic engineering. However, compared with PVC, CPVC resin has a high chlorine content, strong intermolecular polar force, high melt viscosity, and high processing temperature; and its thermal stability is poor, its decomposition temperature is very close to the processing temperature, and the processing window is narrow. If you are not careful, it is easy to cause CPVC to thermally decompose, HCl removal reaction occurs, and double bonds are formed on the molecular chain, causing the sample surface to change color, and then these double bonds will be oxidized and broken or cross-linked to make the polymer lose its performance. In addition, due to the high chlorine content and strong intermolecular forces, its impact resistance is average. The common method is to modify it by adding impact modifiers. However, the molecular chains of commonly used impact modifiers contain unsaturated double bonds, which have poor weather resistance. After long-term use, they are prone to aging and affect the stability of use. The improvement effect of adding light stabilizers and antioxidants is also limited, and cannot meet the situation of higher stability requirements. Therefore, the requirements for the stabilization system during CPVC resin processing are extremely high. Ordinary CPVC often uses organic tin and phosphite as the stabilization system, but the large-scale use of organic tin and phosphite will seriously reduce the heat resistance of CPVC. The addition of excessive stabilizers, impact agents, etc. will also reduce the comprehensive performance and effective chlorine content of CPVC.

[0003] Patent CN202410442593 discloses an enhanced pressure-resistant CPVC mixed material and its application process, which includes 8 to 13 parts of impact modifier, 1 to 5 parts of filler, 1 to 9 parts of processing aid, and 10 to 20 parts of cross-linking agent. The amount of various additives added is at least more than 20 parts. The chlorine content of CPVC is greatly reduced. Patent application CN1970616A discloses a method for improving the thermal stability of chlorinated polyvinyl chloride resin processing. During the CPVC processing, a mixture of calcium / zinc composite stabilizer and hydrotalcite is added to improve the thermal stability of CPVC during processing. This patented technology improves the thermal stability of chlorinated polyvinyl chloride resin to a certain extent, but the thermal stability is still very general and cannot meet higher usage requirements.

[0004] In response to the above-mentioned related issues, it is crucial to provide a new type of functional additive that can give full play to its "one dose for multiple uses" function, effectively reduce the amount of additives used, and at the same time significantly improve the processing stability and practical performance of CPVC. Summary of the invention

[0005] The object of the present invention is to provide a hyperbranched functional additive and a high-performance modified CPVC prepared therefrom, which can effectively reduce the amount of additive used and at the same time greatly improve the processing stability and practical performance of CPVC.

[0006] The technical solution adopted by the present invention to solve its technical problem is: A hyperbranched functional additive, the raw materials of which are: calcium zinc complex, zeolite, hydrotalcite, antioxidant (antioxidant 1010), PE wax and β-diketone; The weight ratio of calcium zinc complex: zeolite: hydrotalcite: antioxidant: PE wax: β-diketone is 100:5-5.5:5-5.5:1-1.3:1-1.3:1-1.3; The calcium-zinc composite agent is composed of hyperbranched polyorganosiloxane grafted high molecular polymer: zinc stearate: calcium stearate: zinc acetylacetonate: epoxy soybean oil in a weight ratio of 4-6:20-24:20-23:1-1.4:1-1.3.

[0007] The hyperbranched polyorganosiloxane grafted high molecular polymer is prepared by the following steps: (1) Synthesis: 3-methacryloxypropyltriethoxysilane (80-100 g) was added dropwise to 3-5% mass concentration of dilute hydrochloric acid (10-30 ml) at room temperature under magnetic stirring. 25-30 min after the addition, the temperature was raised to 50-65° C. and the reaction was continued for 4-8 h. During this period, vacuum was applied every 1 h. Low boiling substances were removed under reduced pressure to obtain a transparent viscous product. (2) Curing: Take the above transparent viscous product, add a photoinitiator (photoinitiator IHT-PI185), and stir evenly in a dark place for later use; In N 2 In the atmosphere, UV curing, crushing into powder.

[0008] In step (1), the dosage ratio of 3-methacryloxypropyltriethoxysilane: dilute hydrochloric acid is 80-100 g: 10-30 ml.

[0009] In step (2), the ratio of the transparent viscous product to the photoinitiator is 40-60 g: 0.1-0.3 g.

[0010] A high performance modified CPVC is prepared by the following method: The CPVC pellets are placed in a high-speed kneader, a dispersant is added dropwise, and the mixture is stirred at a high speed (900 rpm); then the hyperbranched functional additive, anti-impact agent, lubricant and stabilizer are added, and the mixture is kneaded at a high speed (300-700 rpm) for 60-120 minutes at a mixing temperature of 100-130° C. to obtain a mixture; then the mixture is placed in a twin-screw extruder, melt-extruded and granulated to obtain high-performance modified CPVC pellets.

[0011] The dispersant is liquid paraffin or PE wax; the anti-impact agent is one or more of butadiene-styrene copolymer, CPE, and anti-impact agent ACRKM-355P.

[0012] The lubricant is one or more of ethylene bis stearamide, polyethylene wax, and low molecular weight polyamide (polymerization degree 2000-4000).

[0013] The stabilizer is one or two of cerium stearate and methyl tin mercaptan SAK-MT9001.

[0014] Based on the weight of CPVC, the added amount of dispersant is 0.1-0.3%, the added amount of hyperbranched functional additive is 0.5-3%, the added amount of anti-impact agent is 4-6%, the added amount of lubricant is 1.5-2.8%, and the added amount of stabilizer is 1.5-2.8%.

[0015] The twin-screw extruder has six-zone heating, and the temperatures of each zone are set in sequence: zone one 150-170°C, zone two 180-190°C, zone three 170-180°C, zone four 160-170°C, zone five 160-170°C, zone six 150-160°C.

[0016] Polyorganosiloxane has the advantages of good flexibility, good lubricity and outstanding weather resistance. After being grafted with polymer resin (acrylate), its compatibility with CPVC is increased, while its toughness and fluidity can be improved, and the processing rate can be significantly increased. At the same time, due to the strong intermolecular force and high melt viscosity of CPVC, it has to be processed at a higher temperature. However, the processing temperature is not much different from its decomposition temperature, resulting in a very narrow processing window. After adding this functional additive, the melt fluidity becomes better and the processing temperature can be appropriately lowered, thereby widening its window processing temperature.

[0017] The high-performance modified CPVC slice of the present invention has a chlorine content of about 60.0-61.5%, a Vicat temperature of 108-111.5° C., a tensile strength of 55-62.0 PMPa, an impact strength of 8.0-10.0 MPa, and a production efficiency (screw speed) of 22-28 revolutions / min (which can be increased by up to 27%).

[0018] The beneficial effects of the present invention are: (1) The novel functional additive developed by the present invention adopts a chemical method to prepare a hyperbranched polysiloxane grafted high molecular polymer, which has stable properties and is different from the traditional physical simple blending modification; Innovative functions: It has multiple functions and can be used in multiple ways. Specifically, polysiloxane has the characteristics of toughness and self-lubrication, which can reduce the amount of traditional anti-impact agents and lubricants, reduce costs, and increase the "apparent chlorine content" of CPVC. At the same time, it can significantly improve the strength and production efficiency of CPVC.

[0019] (2) The present invention prepares a multifunctional auxiliary agent by combining the hyperbranched polysiloxane grafted polymer resin and a calcium zinc stabilizer through a specific composite process.

[0020] (3) The scheme of the present invention is to first synthesize a hyperbranched polyorganosiloxane grafted high molecular polymer, the main feature of which is that an acrylate group and an organosilicon segment are introduced at the same time. Then, the hyperbranched polyorganosiloxane grafted high molecular polymer is mixed with the calcium zinc complex agent component to form a new calcium zinc complex agent, which is further compounded with other additives. The hyperbranched polyorganosiloxane grafted high molecular polymer is first compounded to form a calcium zinc complex agent and then used in the process to improve the dispersion uniformity and synergistic effect of the stabilizer. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further described in detail below through specific embodiments.

[0022] In the present invention, unless otherwise specified, the raw materials and equipment used can be purchased from the market or are commonly used in the art. The methods in the following embodiments, unless otherwise specified, are all conventional methods in the art.

[0023] Embodiment 1: Weigh 80 g of 3-methacryloxypropyltriethoxysilane (SCA-R74E) and add 10 ml of dilute HCl (5%) solution dropwise at room temperature with magnetic stirring. After 25 minutes of the addition, the temperature is raised to 50°C and the reaction is continued. Vacuum is applied every 1 hour. The reaction is completed after 8 hours, and the ethanol is removed under reduced pressure to obtain a transparent and viscous target product.

[0024] Take 40 g of the above transparent viscous product, add 0.1 g of photoinitiator IHT-PI185, and stir evenly in a dark place for later use. 2 Under the atmosphere, ultraviolet light is used for light curing: single lamp power 1.2kW, main wavelength 365nm, curing time 30min. The cured material is then crushed into hyperbranched polyorganosiloxane grafted polymer powder for standby use.

[0025] First, a hyperbranched polysiloxane grafted polymer is fully compounded with zinc stearate, calcium stearate, zinc acetylacetonate and epoxy soybean oil in an internal mixer to obtain a calcium zinc complex, wherein the weight ratio of the hyperbranched polysiloxane grafted polymer: zinc stearate: calcium stearate: zinc acetylacetonate: epoxy soybean oil is 4:20:20:1:1.

[0026] The calcium zinc complex is then mixed with zeolite, hydrotalcite, antioxidant (antioxidant 1010), PE wax, and β-diketone in a high-speed mixer at 100° C. and 800 rpm to obtain a hyperbranched functional additive. The weight ratio of the calcium zinc complex: zeolite: hydrotalcite: antioxidant: PE wax: β-diketone is 100:5:5:1:1:1.

[0027] According to parts by weight, 100 parts of CPVC pellets with a chlorine content of 67.3% and a degree of polymerization of 500 were placed in a high-speed kneader, 0.1 parts of liquid paraffin as a dispersant was added dropwise, and the mixture was stirred at a high speed of 900 rpm; then 0.5 parts of a hyperbranched functional additive, 6 parts of an impact agent (SBS), 2.8 parts of a lubricant (ethylene bis stearamide) and 2.8 parts of a stabilizer (cerium stearate) were added, and the mixture was kneaded at a high speed of 300 rpm for 120 minutes at a mixing temperature of 100°C to obtain a mixture; then The mixed material is placed in a twin-screw extruder, and the temperatures of each zone of the extruder are: 170°C in zone 1, 190°C in zone 2, 180°C in zone 3, 170°C in zone 4, 170°C in zone 5, and 160°C in zone 6, respectively, for melt extrusion granulation to obtain high-performance modified CPVC pellets; after testing, the chlorine content of CPVC is 60.2%, the Vicat temperature is 109°C, the tensile strength is 56.0PMPa, the impact strength is 8.2MPa, and the production efficiency (screw speed) is 23 rpm (increased by 5.0%).

[0028] Embodiment 2: Weigh 100 g of 3-methacryloxypropyltriethoxysilane (SCA-R74E), add 30 ml of dilute HCl (3%) solution dropwise at room temperature with magnetic stirring. After 30 minutes of addition, heat to 65 ° C and continue the reaction. Vacuum once every 1 hour. The reaction is completed in 4 hours, and the ethanol is removed under reduced pressure to obtain a transparent and viscous target product.

[0029] Take 60 g of the above transparent viscous product, add 0.3 g of photoinitiator IHT-PI185, and stir evenly in a dark place for later use. 2 Under the atmosphere, ultraviolet light is used for light curing: single lamp power 1.2kW, main wavelength 365nm, curing time 30min. The cured material is then crushed into hyperbranched polyorganosiloxane grafted polymer powder for standby use.

[0030] First, a hyperbranched polyorganosiloxane grafted polymer is fully compounded with zinc stearate, calcium stearate, zinc acetylacetonate and epoxy soybean oil in an internal mixer to obtain a calcium zinc complex, wherein the weight ratio of the hyperbranched polyorganosiloxane grafted polymer: zinc stearate: calcium stearate: zinc acetylacetonate: epoxy soybean oil is 6:24:23:1.4:1.3.

[0031] The calcium zinc complex is then mixed with zeolite, hydrotalcite, antioxidant (antioxidant 1010), PE wax, and β-diketone in a high-speed mixer at 100° C. and 800 rpm to obtain a hyperbranched functional additive. The weight ratio of the calcium zinc complex: zeolite: hydrotalcite: antioxidant: PE wax: β-diketone is 100:5.5:5.5:1.3:1.3:1.3.

[0032] According to the weight percentage, 100 parts of CPVC pellets with a chlorine content of 67.3% and a degree of polymerization of 500 were placed in a high-speed kneader, 0.3 parts of a dispersant (molten PE wax) was added dropwise, and the mixture was stirred at 900 rpm; then 1.0 parts of a hyperbranched functional additive, 5.7 parts of an impact agent (ACRKM-355P), 2.4 parts of a lubricant (polyethylene wax) and 2.4 parts of a stabilizer (methyl tin mercaptan SAK-MT9001) were added, and the mixture was kneaded at 700 rpm for 60 minutes at a mixing temperature of 130°C. , and obtain a mixture; then the mixture is placed in a twin-screw extruder, and the temperatures of each zone of the extruder are: 150°C in zone 1, 180°C in zone 2, 170°C in zone 3, 160°C in zone 4, 160°C in zone 5, and 150°C in zone 6, for melt extrusion granulation to obtain high-performance modified CPVC; after testing, the chlorine content of CPVC is 60.4%, the Vicat temperature is 109.5°C, the tensile strength is 57.0PMPa, the impact strength is 8.5MPa, and the production efficiency (screw speed) is 24 rpm (increased by 9.1%).

[0033] Embodiment 3: Weigh 90 g of 3-methacryloxypropyltriethoxysilane (SCA-R74E) and add 20 ml of dilute HCl (5%) solution dropwise at room temperature with magnetic stirring. After 30 minutes of addition, the temperature is raised to 65°C and the reaction is continued. Vacuum is applied every 1 hour. The reaction is completed after 8 hours, and the ethanol is removed under reduced pressure to obtain a transparent and viscous target product.

[0034] Take 50 g of the above transparent viscous product, add 0.2 g of photoinitiator IHT-PI185, and stir evenly in a dark place for later use. 2 Under the atmosphere, ultraviolet light is used for light curing: single lamp power 1.2kW, main wavelength 365nm, curing time 30min. The cured material is then crushed into hyperbranched polyorganosiloxane grafted polymer powder for standby use.

[0035] First, a hyperbranched polysiloxane grafted polymer is fully compounded with zinc stearate, calcium stearate, zinc acetylacetonate and epoxy soybean oil in an internal mixer to obtain a calcium zinc complex, wherein the weight ratio of the hyperbranched polysiloxane grafted polymer: zinc stearate: calcium stearate: zinc acetylacetonate: epoxy soybean oil is 4:20:20:1:1.

[0036] The calcium zinc complex is then mixed with zeolite, hydrotalcite, antioxidant (antioxidant 1010), PE wax, and β-diketone in a high-speed mixer at 100° C. and 800 rpm to obtain a hyperbranched functional additive. The weight ratio of the calcium zinc complex: zeolite: hydrotalcite: antioxidant: PE wax: β-diketone is 100:5:5:1:1:1.

[0037] According to weight parts, 100 parts of CPVC pellets with a chlorine content of 67.3% and a degree of polymerization of 500 were placed in a high-speed kneader, 0.1 parts of dispersant liquid paraffin was added dropwise, and the mixture was stirred at 900 rpm; then 1.5 parts of hyperbranched functional additives, 5.2 parts of impact agent (SBS), 2.1 parts of lubricant (ethylene bis stearamide) and 2.0 parts of stabilizer (cerium stearate) were added, and the mixture was kneaded at 500 rpm for 75 minutes at a mixing temperature of 118°C to obtain a mixture; then The mixture is then placed in a twin-screw extruder, and the temperatures of each zone of the extruder are: 166°C in zone 1, 186°C in zone 2, 176°C in zone 3, 166°C in zone 4, 166°C in zone 5, and 157°C in zone 6, for melt extrusion granulation to obtain high-performance modified CPVC; after testing, the chlorine content of the CPVC is 60.7%, the Vicat temperature is 110°C, the tensile strength is 58.5PMPa, the impact strength is 8.8MPa, and the production efficiency (screw speed) is 25 rpm (increased by 13.6%).

[0038] Embodiment 4: Weigh 90 g of 3-methacryloxypropyltriethoxysilane (SCA-R74E) and add 20 ml of dilute HCl (5%) solution dropwise at room temperature with magnetic stirring. After 30 minutes of addition, the temperature is raised to 65°C and the reaction is continued. Vacuum is applied every 1 hour. The reaction is completed after 8 hours, and the ethanol is removed under reduced pressure to obtain a transparent and viscous target product.

[0039] Take 50 g of the above transparent viscous product, add 0.2 g of photoinitiator IHT-PI185, and stir evenly in a dark place for later use. 2 Under the atmosphere, ultraviolet light is used for light curing: single lamp power 1.2kW, main wavelength 365nm, curing time 30min. The cured material is then crushed into hyperbranched polyorganosiloxane grafted polymer powder for standby use.

[0040] First, a hyperbranched polysiloxane grafted polymer is fully compounded with zinc stearate, calcium stearate, zinc acetylacetonate and epoxy soybean oil in an internal mixer to obtain a calcium zinc complex, wherein the weight ratio of the hyperbranched polysiloxane grafted polymer: zinc stearate: calcium stearate: zinc acetylacetonate: epoxy soybean oil is 4:20:20:1:1.

[0041] The calcium zinc complex is then mixed with zeolite, hydrotalcite, antioxidant (antioxidant 1010), PE wax, and β-diketone in a high-speed mixer at 100° C. and 800 rpm to obtain a hyperbranched functional additive. The weight ratio of the calcium zinc complex: zeolite: hydrotalcite: antioxidant: PE wax: β-diketone is 100:5:5:1:1:1.

[0042] According to the weight percentage, 100 parts of CPVC pellets with a chlorine content of 67.3% and a degree of polymerization of 500 were placed in a high-speed kneader, 0.1 parts of liquid paraffin as a dispersant was added dropwise, and the mixture was stirred at a high speed of 900 rpm; then 2 parts of a hyperbranched functional additive, 4.7 parts of an impact agent (ACRKM-355P), 1.8 parts of a lubricant (ethylene bisstearamide) and 1.7 parts of a stabilizer (cerium stearate) were added, and the mixture was kneaded at a high speed of 500 rpm for 75 minutes at a mixing temperature of 125°C to obtain a mixture; then The mixed material is then placed in a twin-screw extruder, and the temperatures of each zone of the extruder are: 165°C in zone 1, 184°C in zone 2, 174°C in zone 3, 164°C in zone 4, 164°C in zone 5, and 155°C in zone 6, for melt extrusion granulation to obtain high-performance modified CPVC; after testing, the chlorine content of the CPVC is 61.2%, the Vicat temperature is 110.5°C, the tensile strength is 59.5PMPa, the impact strength is 9.3MPa, and the production efficiency (screw speed) is 26.5 rpm (increased by 20.5%).

[0043] Embodiment 5: Weigh 90 g of 3-methacryloxypropyltriethoxysilane (SCA-R74E) and add 20 ml of dilute HCl (5%) solution dropwise at room temperature with magnetic stirring. After 30 minutes of addition, the temperature is raised to 65°C and the reaction is continued. Vacuum is applied every 1 hour. The reaction is completed after 8 hours, and the ethanol is removed under reduced pressure to obtain a transparent and viscous target product.

[0044] Take 50 g of the above transparent viscous product, add 0.2 g of photoinitiator IHT-PI185, and stir evenly in a dark place for later use. 2 Under the atmosphere, ultraviolet light is used for light curing: single lamp power 1.2kW, main wavelength 365nm, curing time 30min. The cured material is then crushed into hyperbranched polyorganosiloxane grafted polymer powder for standby use.

[0045] First, a hyperbranched polysiloxane grafted polymer is fully compounded with zinc stearate, calcium stearate, zinc acetylacetonate and epoxy soybean oil in an internal mixer to obtain a calcium zinc complex, wherein the weight ratio of the hyperbranched polysiloxane grafted polymer: zinc stearate: calcium stearate: zinc acetylacetonate: epoxy soybean oil is 4:20:20:1:1.

[0046] The calcium zinc complex is then mixed with zeolite, hydrotalcite, antioxidant (antioxidant 1010), PE wax, and β-diketone in a high-speed mixer at 100° C. and 800 rpm to obtain a hyperbranched functional additive. The weight ratio of the calcium zinc complex: zeolite: hydrotalcite: antioxidant: PE wax: β-diketone is 100:5:5:1:1:1.

[0047] According to weight parts, 100 parts of CPVC pellets with a chlorine content of 67.3% and a polymerization degree of 500 were placed in a high-speed kneader, 0.1 parts of dispersant liquid paraffin were added dropwise, and the mixture was stirred at 900 rpm; then 3 parts of hyperbranched functional additives, 4 parts of impact agents (CPE), 1.5 parts of lubricants (low molecular weight polyamide, polymerization degree 2000) and 1.5 parts of stabilizers (methyl tin mercaptan SAK-MT9001) were added, and the mixture was kneaded at 500 rpm for 90 minutes at a mixing temperature of 125°C to obtain to the mixture; then the mixture is placed in a twin-screw extruder, and the temperatures of each zone of the extruder are: zone 1 163°C, zone 2 184°C, zone 3 172°C, zone 4 162°C, zone 5 162°C, zone 6 153°C, for melt extrusion granulation to obtain high-performance modified CPVC; after testing, the chlorine content of CPVC is 61.2%, the Vicat temperature is 111°C, the tensile strength is 61.5PMPa, the impact strength is 9.5MPa, and the production efficiency (screw speed) is 28 rpm (increased by 27.3%).

[0048] Comparative Example 1: The difference between this example and Example 1 is that no hyperbranched functional additive is added during the preparation of the high-performance modified CPVC.

[0049] Comparative Example 2: The difference between this example and Example 2 is that no hyperbranched functional additive is added during the preparation of the high-performance modified CPVC.

[0050] Comparative Example 3: The difference between this example and Example 3 is that no hyperbranched functional additive is added during the preparation of the high-performance modified CPVC.

[0051] Comparative Example 4: The difference between this example and Example 4 is that no hyperbranched functional additive is added during the preparation of the high-performance modified CPVC.

[0052] Comparative Example 5: The difference between this example and Example 5 is that no hyperbranched functional additive is added during the preparation of the high-performance modified CPVC.

[0053] Table 1. Performance indicators of CPVC prepared based on hyperbranched functional additives

[0054] From the data, with the increase of the dosage of hyperbranched functional additives, the tensile and impact strengths have increased significantly. In addition, the Vicat temperature has also increased significantly. The adjustment of the dosage of other additives is to maintain the stability of the processing torque. At the same time, the results show that the adjustment of the dosage of other additives has a negligible effect on the performance.

[0055] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A hyperbranched functional additive, characterized in that: The raw materials are composed of calcium zinc complex, zeolite, hydrotalcite, antioxidant, PE wax and β-diketone; The weight ratio of calcium zinc complex: zeolite: hydrotalcite: antioxidant: PE wax: β-diketone is 100:5-5.5:5-5.5:1-1.3:1-1.3:1-1.3; The calcium-zinc complex is composed of hyperbranched polyorganosiloxane grafted high molecular polymer: zinc stearate: calcium stearate: zinc acetylacetonate: epoxy soybean oil in a weight ratio of 4-6:20-24:20-23:1-1.4:1-1.

3.

2. A hyperbranched functional additive according to claim 1, characterized in that: The hyperbranched polyorganosiloxane grafted high molecular polymer is prepared by the following steps: (1) Synthesis: 3-methacryloxypropyltriethoxysilane was added dropwise to 3-5% mass concentration of dilute hydrochloric acid at room temperature under magnetic stirring. After 25-30 minutes of completion of the addition, the temperature was raised to 50-65°C and the reaction was continued for 4-8 hours. During this period, vacuum was applied every 1 hour. Low boiling substances were removed by decompression to obtain a transparent viscous product. (2) Curing: Take the above transparent viscous product, add a photoinitiator, and stir evenly in a dark place for later use; In N2 atmosphere, UV curing and crushing to form powder.

3. A hyperbranched functional additive according to claim 2, characterized in that, In step (1), the ratio of 3-methacryloxypropyltriethoxysilane to dilute hydrochloric acid is 80-100 g: 10-30 ml.

4. A hyperbranched functional additive according to claim 1, characterized in that: In step (2), the ratio of transparent viscous product to photoinitiator is 40-60 g: 0.1-0.3 g.

5. A high performance modified CPVC, characterized in that: Prepared by the following method: The CPVC pellets are placed in a high-speed kneader, a dispersant is added dropwise, and the mixture is stirred at a high speed; then the hyperbranched functional additive, anti-impact agent, lubricant and stabilizer described in claim 1 are added, and the mixture is kneaded at a high speed for 60 to 120 minutes at a mixing temperature of 100 to 130° C. to obtain a mixture; then the mixture is placed in a twin-screw extruder, melt-extruded and granulated to obtain high-performance modified CPVC pellets.

6. The high performance modified CPVC according to claim 5, characterized in that: The dispersant is liquid paraffin or PE wax; the anti-impact agent is one or more of butadiene-styrene copolymer, CPE, and anti-impact agent ACRKM-355P.

7. The high performance modified CPVC according to claim 5, characterized in that: The lubricant is one or more of ethylene bis stearamide, polyethylene wax, and low molecular weight polyamide.

8. The high performance modified CPVC according to claim 5, characterized in that: The stabilizer is one or two of cerium stearate and methyl tin mercaptan SAK-MT9001.

9. The high performance modified CPVC according to claim 5, characterized in that: Based on the weight of CPVC, the added amount of dispersant is 0.1-0.3%, the added amount of hyperbranched functional additive is 0.5-3%, the added amount of anti-impact agent is 4-6%, the added amount of lubricant is 1.5-2.8%, and the added amount of stabilizer is 1.5-2.8%.

10. The high performance modified CPVC according to claim 5, characterized in that: The twin-screw extruder has six-zone heating, and the temperatures of each zone are set in sequence: zone one 150-170°C, zone two 180-190°C, zone three 170-180°C, zone four 160-170°C, zone five 160-170°C, zone six 150-160°C.

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