Low-emission type polypropylene material and preparation method and application thereof
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A polypropylene material, low emission technology, applied in the field of modified plastics
Active Publication Date: 2013-01-16
TIANJIN KINGFA NEW MATERIAL
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However, the low-molecular organic repellant used in this method has compatibility problems with the polypropylene resin and the carbonates and their decomposition products, and water and fatty alcohols with a boiling point lower than 200°C, due to their low boiling point and And the premix is added to the extruder in the main feed, then there are problems with the durability and uniformity of the melt of the modified polypropylene material
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Embodiment 1
[0031] A kind of low emission type polypropylene material, its raw material formula is shown in Table 1, and its preparation method comprises the following steps:
[0032] Add polypropylene, elastomer, mineral filler, and stabilizer from the main feeding port of the twin-screw extruder for melt blending; atomize the VOC stripping agent, then fully mix with the VOC air stripping agent, add The side feeding port of the twin-screw extruder is melted and blended with other raw materials, and extruded and granulated by vacuum extrusion through the extruder to obtain the low-emission polypropylene material; the aspect ratio of the twin-screw extruder is (36-56): 1. The processing temperature of the twin-screw extruder is 180°C. VOC eluent atomization technology and extruder vacuum extraction both adopt conventional processes.
[0033] Among them, the polypropylene used is homopolypropylene, the elastomer is ethylene-butene copolymer, the VOC stripping agent is isopropanol, the mine...
Embodiment 2
[0035] A low-emission polypropylene material, its raw material formula is shown in Table 1, and its preparation method is the same as in Example 1, wherein the processing temperature of the twin-screw extruder is 210°C.
[0036] The mineral filler used is talcum powder, and the VOC stripping agent is N 2 , polypropylene is copolymerized polypropylene, elastomer is ethylene-propylene-diene copolymer, VOC eluting agent is n-hexanol. Stabilizer used is with embodiment 1.
Embodiment 3
[0038] A low-emission polypropylene material, its raw material formula is shown in Table 1, its preparation method is the same as that of Example 1, and the processing temperature of the twin-screw extruder is 230°C.
[0039] The mineral filler used is talcum powder, and the VOC stripping agent is N 2 , the polypropylene used is a mixture of homopolypropylene and copolymerized polypropylene in a mass ratio of 1:1, and the elastomer is composed of ethylene-butene copolymer and ethylene-octene copolymer in a mass ratio of 1:1 Mixture, VOC stripping agent is ethanol. Stabilizer used is with embodiment 1.
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Abstract
The invention discloses a low-emission type polypropylene material and a preparation method and application thereof. The polypropylene material is prepared from 40-90% of polypropylene, 5-25% of elastomers, 0-40% of mineral fillers, 1-5% of VOC (volatile organic compound) eluting agents, 0.1-2% of stabilizers and VOC gas stripping agents, wherein the use amount of the VOC gas stripping agents accounts for 50-600% of the volume of polypropylene material melts, the VOC eluting agents refer to more than one kind of alcohol, and the VOC gas stripping agents are N2. The VOC eluting agents are fed from a side feed port of a double-screw extruder, so that the defect of premature volatilization of the VOC eluting agents due to a low boiling point when main feed is added is overcome. Besides, the VOC eluting agents are atomized by the aid of the foam plastic foaming principle, then the VOC gas stripping agents are brought to the polypropylene material melts to enable the VOC eluting agents and the polypropylene material melts to be more uniformly mixed, VOCs are removed more thoroughly after vacuum extraction, and TVOC (total volatile organic compound) remnants are not more than 20 microgram C / g.
Description
technical field [0001] The invention belongs to the field of modified plastics, and in particular relates to a modified polypropylene, in particular to a low-emission polypropylene material suitable for manufacturing automotive interior parts and its preparation method and application. Background technique [0002] Modified polypropylene materials have been widely used in automotive interior parts, including instrument panels, sub-dashboards, door panels, pillars, etc. During the use of the car, especially when the temperature in the car cabin is high, the volatile organic compounds (TVOC) remaining in the modified polypropylene material will be released, causing damage to the body of the driver and passengers. TVOC substances mainly include hydrocarbons, benzenes, aldehydes, etc., mainly derived from residual monomers in the synthesis of resins such as polypropylene and elastomers, additives such as antioxidants, light stabilizers, lubricants, toners, and modified polymers....
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