Preparation method for chlorinated polyethylene/polyvinyl chloride composite foaming material

Abstract

The invention discloses a preparation method of a chlorinated polyethylene / polyvinyl chloride composite foaming material, which belongs to the technical field of foaming material preparation. In the present invention, polyvinyl chloride absorbs dioctyl phthalate and swells to make it soft and elastic, and then blends it with crosslinking agent dicumyl oxide and stearyl acrylate, and adds nucleating agents calcium carbonate, chlorine The chlorinated polyethylene / polyvinyl chloride masterbatch is obtained by cooling and discharging the chlorinated polyethylene / polyvinyl chloride masterbatch. The chlorinated polyethylene / polyvinyl chloride masterbatch is heated and formed in a mold, and then the non-polluting supercritical carbon dioxide is used as a physical foam agent, increase the expansion ratio, and generate uniform and fine cells, thereby obtaining the method of chlorinated polyethylene / polyvinyl chloride composite foam material. Examples prove that the reaction of the preparation process of the present invention is mild, and while maintaining the advantages of low cost and high flame retardancy, the density of the prepared chlorinated polyethylene / polyvinyl chloride composite foam material is the smallest, the cell distribution is uniform, and the strength is also high. has been significantly improved.

Description

technical field

[0001] The invention discloses a preparation method of a chlorinated polyethylene / polyvinyl chloride composite foaming material, which belongs to the technical field of foaming material preparation. Background technique

[0002] Polyvinyl chloride (PVC) is a general-purpose thermoplastic with excellent performance, and it is one of the plastic varieties with the largest output in my country. Polyvinyl chloride has the advantages of good flame retardancy, corrosion resistance, high mechanical strength, good electrical insulation, and low cost, but at the same time, it also has disadvantages such as poor light and heat stability, low impact strength, poor processing and forming performance, and high density. Therefore, various stabilizers, processing aids and impact modifiers must be added during the processing of PVC to improve its light / heat stability, processing performance and impact resistance. By adding foaming agent and processing aids to polyvinyl chlo...

Examples

example 1

[0020] First, weigh 95 parts of polyvinyl chloride, 55 parts of dioctyl phthalate, and 5 parts of zinc oxide in parts by mass. After fully mixing, they are placed in a drying oven at 75°C for swelling until the mixture is Soft, to obtain pre-swelled polyvinyl chloride; then put the above-mentioned pre-swelled polyvinyl chloride into the internal mixer for plasticization for 3min, the temperature of the mixing room is 140°C, the rotor speed is 60r / min, and then 100 parts of chlorine Polyethylene, 0.5 parts of dicumyl peroxide, 5 parts of stearyl acrylate and 5 parts of nano-calcium carbonate were added to the internal mixer, mixed for 7 minutes, and the temperature of debinding was controlled at 170 ° C, discharged, cooled to room temperature, and obtained Chlorinated polyethylene / polyvinyl chloride masterbatch; Next, put the above-mentioned chlorinated polyethylene / polyvinyl chloride masterbatch on a flat vulcanizing machine, heat it in a mold at 185°C, press it for 10min under...

example 2

[0023] First, weigh 98 parts of polyvinyl chloride, 58 parts of dioctyl phthalate, and 5.5 parts of zinc oxide in parts by mass. After fully mixing, they are placed in a drying oven at 78°C for swelling until the mixture is Soft and soft to obtain pre-swelled polyvinyl chloride; then put the above-mentioned pre-swelled polyvinyl chloride into the mixer for plasticization for 4min, the temperature of the mixing room is 143°C, the rotor speed is 65r / min, and then 105 parts of chlorine Polyethylene, 0.55 parts of dicumyl peroxide, 5.5 parts of stearyl acrylate and 5.5 parts of nano-calcium carbonate were added to the internal mixer, mixed for 8 minutes, and the temperature of debinding was controlled at 175 ° C, discharged, cooled to room temperature, and obtained Chlorinated polyethylene / polyvinyl chloride masterbatch; Next, put the above chlorinated polyethylene / polyvinyl chloride masterbatch on a flat vulcanizer, heat it in a mold at 188°C, press it for 11 minutes under a press...

example 3

[0026] First, weigh 100 parts of polyvinyl chloride, 60 parts of dioctyl phthalate, and 6 parts of zinc oxide according to the number of parts by mass. After fully mixing, they are placed in a drying oven at 80°C for swelling until the mixture is Soft and soft to obtain pre-swelled polyvinyl chloride; then put the above-mentioned pre-swelled polyvinyl chloride into the internal mixer for plasticization for 5min, the temperature of the mixing room is 145°C, the rotor speed is 70r / min, and then 110 parts of chlorine Polyethylene, 0.6 parts of dicumyl peroxide, 6 parts of stearyl acrylate and 6 parts of nano-calcium carbonate were added to the internal mixer, mixed for 10 minutes, and the debinding temperature was controlled to be 180 ° C, discharged, cooled to room temperature, and obtained Chlorinated polyethylene / polyvinyl chloride masterbatch; Next, put the above-mentioned chlorinated polyethylene / polyvinyl chloride masterbatch on a flat vulcanizing machine, heat it in a mold ...

technical field

[0001] The invention discloses a preparation method of a chlorinated polyethylene / polyvinyl chloride composite foaming material, which belongs to the technical field of foaming material preparation. Background technique

[0002] Polyvinyl chloride (PVC) is a general-purpose thermoplastic with excellent performance, and it is one of the plastic varieties with the largest output in my country. Polyvinyl chloride has the advantages of good flame retardancy, corrosion resistance, high mechanical strength, good electrical insulation, and low cost, but at the same time, it also has disadvantages such as poor light and heat stability, low impact strength, poor processing and forming performance, and high density. Therefore, various stabilizers, processing aids and impact modifiers must be added during the processing of PVC to improve its light / heat stability, processing performance and impact resistance. By adding foaming agent and processing aids to polyvinyl chlo...

Examples

example 1

[0020] First, weigh 95 parts of polyvinyl chloride, 55 parts of dioctyl phthalate, and 5 parts of zinc oxide in parts by mass. After fully mixing, they are placed in a drying oven at 75°C for swelling until the mixture is Soft, to obtain pre-swelled polyvinyl chloride; then put the above-mentioned pre-swelled polyvinyl chloride into the internal mixer for plasticization for 3min, the temperature of the mixing room is 140°C, the rotor speed is 60r / min, and then 100 parts of chlorine Polyethylene, 0.5 parts of dicumyl peroxide, 5 parts of stearyl acrylate and 5 parts of nano-calcium carbonate were added to the internal mixer, mixed for 7 minutes, and the temperature of debinding was controlled at 170 ° C, discharged, cooled to room temperature, and obtained Chlorinated polyethylene / polyvinyl chloride masterbatch; Next, put the above-mentioned chlorinated polyethylene / polyvinyl chloride masterbatch on a flat vulcanizing machine, heat it in a mold at 185°C, press it for 10min under...

example 2

[0023] First, weigh 98 parts of polyvinyl chloride, 58 parts of dioctyl phthalate, and 5.5 parts of zinc oxide in parts by mass. After fully mixing, they are placed in a drying oven at 78°C for swelling until the mixture is Soft and soft to obtain pre-swelled polyvinyl chloride; then put the above-mentioned pre-swelled polyvinyl chloride into the mixer for plasticization for 4min, the temperature of the mixing room is 143°C, the rotor speed is 65r / min, and then 105 parts of chlorine Polyethylene, 0.55 parts of dicumyl peroxide, 5.5 parts of stearyl acrylate and 5.5 parts of nano-calcium carbonate were added to the internal mixer, mixed for 8 minutes, and the temperature of debinding was controlled at 175 ° C, discharged, cooled to room temperature, and obtained Chlorinated polyethylene / polyvinyl chloride masterbatch; Next, put the above chlorinated polyethylene / polyvinyl chloride masterbatch on a flat vulcanizer, heat it in a mold at 188°C, press it for 11 minutes under a press...

example 3

[0026] First, weigh 100 parts of polyvinyl chloride, 60 parts of dioctyl phthalate, and 6 parts of zinc oxide according to the number of parts by mass. After fully mixing, they are placed in a drying oven at 80°C for swelling until the mixture is Soft and soft to obtain pre-swelled polyvinyl chloride; then put the above-mentioned pre-swelled polyvinyl chloride into the internal mixer for plasticization for 5min, the temperature of the mixing room is 145°C, the rotor speed is 70r / min, and then 110 parts of chlorine Polyethylene, 0.6 parts of dicumyl peroxide, 6 parts of stearyl acrylate and 6 parts of nano-calcium carbonate were added to the internal mixer, mixed for 10 minutes, and the debinding temperature was controlled to be 180 ° C, discharged, cooled to room temperature, and obtained Chlorinated polyethylene / polyvinyl chloride masterbatch; Next, put the above-mentioned chlorinated polyethylene / polyvinyl chloride masterbatch on a flat vulcanizing machine, heat it in a mold ...