Toughening agent, PVC pipe material and preparation method of PVC pipe material

Abstract

The invention discloses a toughening agent, a PVC pipe material and a preparation method of the PVC pipe material. The toughening agent is prepared by uniformly mixing the following components in percentage by mass: 70-80% of low-density polyethylene and 20-30% of nitrile rubber. The low-density polyethylene and the nitrile rubber are compounded, and the mixing ratio is optimized, so that the toughening agent with excellent performance is obtained, the toughening agent is very suitable for PVC pipe materials, and the low-temperature impact resistance of the PVC pipe materials can be obviouslyimproved.

Description

technical field

[0001] The invention belongs to the field of polymer materials, and in particular relates to a toughening agent, a PVC pipe material and a preparation method thereof. Background technique

[0002] Polyvinyl chloride plastic is polymerized from vinyl chloride monomer and is one of the most commonly used thermoplastics. Its trade name is called "chlorine plastic" for short, and its English abbreviation is PVC. Pure polyvinyl chloride resin is a hard thermoplastic substance, its decomposition temperature is very close to the plasticizing temperature, and its mechanical strength is poor. Therefore, polyvinyl chloride resin cannot be used to mold products, and plasticizers, stabilizers, fillers, etc. must be added to improve performance to make polyvinyl chloride plastics, and then processed into various products. Polyvinyl chloride can be divided into rigid polyvinyl chloride and soft polyvinyl chloride according to the amount of plasticizer added.

[0003] PV...

Examples

Embodiment 1

[0027] According to parts by weight, 100 parts of polyvinyl chloride, 10 parts of acrylonitrile-butadiene-styrene copolymer, 5 parts of maleic anhydride grafted polyethylene, toughening agent (mass ratio is 3:1 low density polyethylene and nitrile rubber) 10 parts, 1 part of chlorinated polyethylene, 0.5 part of antioxidant 1098, 0.5 part of antioxidant 168, 1 part of zinc stearate was placed in the mixer at room temperature and mixed for 1 minute, and the mixing speed was 150 rpm / minute. Add the mixed raw materials into a twin-screw extruder, melt and extrude and granulate to obtain a PVC pipe material, wherein the temperature of the first zone of the twin-screw extruder is 160°C, and the temperature of the second zone is 170°C , the temperature of the third zone is 180°C, the temperature of the fourth zone is 210°C, the temperature of the fifth zone is 210°C, the temperature of the sixth zone is 210°C, and the speed is 300rpm.

Embodiment 2

[0029] According to parts by weight, 100 parts of polyvinyl chloride, 20 parts of acrylonitrile-butadiene-styrene copolymer, 6 parts of maleic anhydride grafted polyethylene, toughening agent (mass ratio is 3:1 low density polyethylene and nitrile rubber) 12 parts, 5 parts of chlorinated polyethylene, 2 parts of antioxidant 1098, 2 parts of antioxidant 168, 5 parts of zinc stearate were placed in mixer and mixed at room temperature for 2 minutes, mixing speed 180 rpm minute. Add the mixed raw materials into the twin-screw extruder, melt and extrude and granulate to obtain PVC pipe material, wherein the temperature of the first zone of the twin-screw extruder is 170°C, and the temperature of the second zone is 180°C , the temperature of the third zone is 200°C, the temperature of the fourth zone is 220°C, the temperature of the fifth zone is 220°C, the temperature of the sixth zone is 220°C, and the speed is 500rpm.

Embodiment 3

[0031] 100 parts by weight of polyvinyl chloride, 12 parts of acrylonitrile-butadiene-styrene copolymer, 8 parts of maleic anhydride grafted polyethylene, toughening agent (mass ratio is 3:1 low density polyethylene and 14 parts of nitrile rubber), 3 parts of chlorinated polyethylene, 1 part of antioxidant 1098, 2 parts of antioxidant 168, and 3 parts of zinc stearate were placed in a mixer at room temperature and mixed for 2 minutes at a mixing speed of 170 rpm . Add the mixed raw materials into a twin-screw extruder, melt and extrude and granulate to obtain PVC pipe material, wherein the temperature of the first zone of the twin-screw extruder is 170°C, and the temperature of the second zone is 190°C , the temperature of the third zone is 180°C, the temperature of the fourth zone is 210°C, the temperature of the fifth zone is 220°C, the temperature of the sixth zone is 220°C, and the speed is 500rpm.

technical field

[0001] The invention belongs to the field of polymer materials, and in particular relates to a toughening agent, a PVC pipe material and a preparation method thereof. Background technique

[0002] Polyvinyl chloride plastic is polymerized from vinyl chloride monomer and is one of the most commonly used thermoplastics. Its trade name is called "chlorine plastic" for short, and its English abbreviation is PVC. Pure polyvinyl chloride resin is a hard thermoplastic substance, its decomposition temperature is very close to the plasticizing temperature, and its mechanical strength is poor. Therefore, polyvinyl chloride resin cannot be used to mold products, and plasticizers, stabilizers, fillers, etc. must be added to improve performance to make polyvinyl chloride plastics, and then processed into various products. Polyvinyl chloride can be divided into rigid polyvinyl chloride and soft polyvinyl chloride according to the amount of plasticizer added.

[0003] PV...

Examples

Embodiment 1

[0027] According to parts by weight, 100 parts of polyvinyl chloride, 10 parts of acrylonitrile-butadiene-styrene copolymer, 5 parts of maleic anhydride grafted polyethylene, toughening agent (mass ratio is 3:1 low density polyethylene and nitrile rubber) 10 parts, 1 part of chlorinated polyethylene, 0.5 part of antioxidant 1098, 0.5 part of antioxidant 168, 1 part of zinc stearate was placed in the mixer at room temperature and mixed for 1 minute, and the mixing speed was 150 rpm / minute. Add the mixed raw materials into a twin-screw extruder, melt and extrude and granulate to obtain a PVC pipe material, wherein the temperature of the first zone of the twin-screw extruder is 160°C, and the temperature of the second zone is 170°C , the temperature of the third zone is 180°C, the temperature of the fourth zone is 210°C, the temperature of the fifth zone is 210°C, the temperature of the sixth zone is 210°C, and the speed is 300rpm.

Embodiment 2

[0029] According to parts by weight, 100 parts of polyvinyl chloride, 20 parts of acrylonitrile-butadiene-styrene copolymer, 6 parts of maleic anhydride grafted polyethylene, toughening agent (mass ratio is 3:1 low density polyethylene and nitrile rubber) 12 parts, 5 parts of chlorinated polyethylene, 2 parts of antioxidant 1098, 2 parts of antioxidant 168, 5 parts of zinc stearate were placed in mixer and mixed at room temperature for 2 minutes, mixing speed 180 rpm minute. Add the mixed raw materials into the twin-screw extruder, melt and extrude and granulate to obtain PVC pipe material, wherein the temperature of the first zone of the twin-screw extruder is 170°C, and the temperature of the second zone is 180°C , the temperature of the third zone is 200°C, the temperature of the fourth zone is 220°C, the temperature of the fifth zone is 220°C, the temperature of the sixth zone is 220°C, and the speed is 500rpm.

Embodiment 3

[0031] 100 parts by weight of polyvinyl chloride, 12 parts of acrylonitrile-butadiene-styrene copolymer, 8 parts of maleic anhydride grafted polyethylene, toughening agent (mass ratio is 3:1 low density polyethylene and 14 parts of nitrile rubber), 3 parts of chlorinated polyethylene, 1 part of antioxidant 1098, 2 parts of antioxidant 168, and 3 parts of zinc stearate were placed in a mixer at room temperature and mixed for 2 minutes at a mixing speed of 170 rpm . Add the mixed raw materials into a twin-screw extruder, melt and extrude and granulate to obtain PVC pipe material, wherein the temperature of the first zone of the twin-screw extruder is 170°C, and the temperature of the second zone is 190°C , the temperature of the third zone is 180°C, the temperature of the fourth zone is 210°C, the temperature of the fifth zone is 220°C, the temperature of the sixth zone is 220°C, and the speed is 500rpm.

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