Preparation method of modified polypropylene material with low volatile organic compounds (VOC)

Abstract

The invention discloses a preparation method of a modified polypropylene material with low volatile organic compounds (VOC). The preparation method of the modified polypropylene material with the lowVOC comprises the steps of utilizing a vacuum feeding method for feeding a mixture of polypropylene, talcum powder, glass beads, a mold release agent, an antioxygen, a lubricant, a light stabilizer, calcium oxide and the like into a double-vacuum parallel twin-screw extruder, melting, extruding, cooling to the room temperature, drying, pelleting in a pelletizer, and obtaining the modified polypropylene material. According to the preparation method of the modified polypropylene material with the low VOC provided by the invention, through adopting a double-vacuum system, improving the rotating speed, and adding a VOC eluting agent into a side material port, the smell and the emission of the product are reduced; and meanwhile, multiple feeding hoppers are used for feeding, so that the feedingaccuracy is high, and the efficiency is high.

Description

technical field

[0001] The invention relates to a polymer material, in particular to a preparation method of a low-VOC modified polypropylene material. Background technique

[0002] With the increasingly stringent requirements for material performance in the automotive industry, environmentally friendly low-VOC materials have become one of the hot spots and directions for the development of automotive interior materials. Automotive interior parts are generally modified PP composite materials, and the main reasons for the generation of VOC are: (1) PP resin. Conventional high-flow PP resin is generally produced by organic peroxide degradation method, and the residual peroxide in the resin will react to generate organic volatiles such as alcohol and aldehyde; (2) processing aids and their compatibility with the matrix PP resin. Processing aids with poor heat resistance and poor compatibility with the matrix resin will produce VOC through precipitation and volatilization; (3) ...

Examples

Embodiment 1

[0026] The low-VOC modified polypropylene material in this example is made up of the following raw materials by weight:

[0027]

[0028]

[0029] Concrete preparation method comprises the following steps:

[0030] (1) Add polypropylene, talcum powder, glass beads, release agent, antioxidant, lubricant, light stabilizer, and calcium oxide to No. 1-8 storage bins by vacuum feeding;

[0031] (2) According to the distribution ratio of each component, each component enters No. 1-8 feeding bin from No. 1-8 storage bin;

[0032] (3) Adjust the feeding speed of No. 1-8 feeding bins respectively, so that each component enters the mixing bin for mixing according to the ratio;

[0033] (4) Adjust the feeding speed, put the above-mentioned mixture into a double-vacuum parallel twin-screw extruder for melting and extruding; Zone 200°C, Zone 5 200°C, Zone 6 200°C, Zone 7 200°C, Zone 8 200°C, Zone 9 200°C, Zone 10 200°C, Zone 11 200°C, Zone 12 200°C, Screen changing zone 200°C, The...

Embodiment 2

[0037] The raw material of embodiment 2 is the same as that of embodiment 1, the only difference is that the VOC eluting agent is added at the side feeding port of the twin-screw extruder, and the VOC eluting agent is not atomized.

Embodiment 3

[0038] The raw material of embodiment 3 is the same as that of embodiment 1, the only difference is that the VOC eluting agent is added at the side feeding port of the twin-screw extruder, and the VOC eluting agent is atomized.

[0039] Odor evaluation was evaluated according to the odor evaluation standard PV3900 of Volkswagen AG. TVOC is evaluated according to PV3341.

[0040] physical properties

technical field

[0001] The invention relates to a polymer material, in particular to a preparation method of a low-VOC modified polypropylene material. Background technique

[0002] With the increasingly stringent requirements for material performance in the automotive industry, environmentally friendly low-VOC materials have become one of the hot spots and directions for the development of automotive interior materials. Automotive interior parts are generally modified PP composite materials, and the main reasons for the generation of VOC are: (1) PP resin. Conventional high-flow PP resin is generally produced by organic peroxide degradation method, and the residual peroxide in the resin will react to generate organic volatiles such as alcohol and aldehyde; (2) processing aids and their compatibility with the matrix PP resin. Processing aids with poor heat resistance and poor compatibility with the matrix resin will produce VOC through precipitation and volatilization; (3) ...

Examples

Embodiment 1

[0026] The low-VOC modified polypropylene material in this example is made up of the following raw materials by weight:

[0027]

[0028]

[0029] Concrete preparation method comprises the following steps:

[0030] (1) Add polypropylene, talcum powder, glass beads, release agent, antioxidant, lubricant, light stabilizer, and calcium oxide to No. 1-8 storage bins by vacuum feeding;

[0031] (2) According to the distribution ratio of each component, each component enters No. 1-8 feeding bin from No. 1-8 storage bin;

[0032] (3) Adjust the feeding speed of No. 1-8 feeding bins respectively, so that each component enters the mixing bin for mixing according to the ratio;

[0033] (4) Adjust the feeding speed, put the above-mentioned mixture into a double-vacuum parallel twin-screw extruder for melting and extruding; Zone 200°C, Zone 5 200°C, Zone 6 200°C, Zone 7 200°C, Zone 8 200°C, Zone 9 200°C, Zone 10 200°C, Zone 11 200°C, Zone 12 200°C, Screen changing zone 200°C, The...

Embodiment 2

[0037] The raw material of embodiment 2 is the same as that of embodiment 1, the only difference is that the VOC eluting agent is added at the side feeding port of the twin-screw extruder, and the VOC eluting agent is not atomized.

Embodiment 3

[0038] The raw material of embodiment 3 is the same as that of embodiment 1, the only difference is that the VOC eluting agent is added at the side feeding port of the twin-screw extruder, and the VOC eluting agent is atomized.

[0039] Odor evaluation was evaluated according to the odor evaluation standard PV3900 of Volkswagen AG. TVOC is evaluated according to PV3341.

[0040] physical properties

Images