CN103665571A - Modified polypropylene plastic for automobile ceiling and preparation method thereof - Google Patents

Abstract

The invention discloses a modified polypropylene plastic for an automobile ceiling, and is characterized in that the modified polypropylene plastic is prepared from the following raw materials in parts by weight: 100-110 parts of copolymerized polypropylene, 12-15 parts of homopolymerized polypropylene, 24-28 parts of nano silicon carbide, 12-15 parts of PPS, 3-5 parts of ethylene glycol, 3-4 parts of zinc stearate, 1-2 parts of an anti-aging agent RD, 1-2 parts of triethanolamine, 15-20 parts of active calcium carbonate, 4-7 parts of zinc oxide, 4-6 parts of aluminum nitride, 2-3 parts of maleic anhydride, and 6-9 parts of an auxiliary agent. The modified polypropylene plastic has the advantages of lubrication, abrasion resistance, strong corrosion resistance ability, high-temperature oxidation resistance, good scratch resistance, good dimensional stability, high mechanical strength, low cost and excellent comprehensive properties, and does not fragment with rapid cooling and rapid heating.

Description

A kind of modified polypropylene plastic for automobile ceiling and preparation method thereof

technical field

The invention relates to a composite material for automobile interior decoration, in particular to a modified polypropylene plastic for automobile ceiling and a preparation method thereof.

Background technique

Automobiles have become one of the main means of transportation in modern society and are a major energy consumer. It is generally believed that the weight of auto parts is reduced by 1%, and the fuel consumption is also nearly 1%. Therefore, reducing the weight of auto parts is of great significance to energy saving and environmental protection. Among them, the most important method is to replace steel with plastic, so that polypropylene (PP) materials are widely used in bumpers, door panels, instrument panels, pillar guards, etc. Polypropylene (PP) has excellent heat resistance, good bending fatigue resistance, low price, and a wide range of uses; but PP has low impact toughness, poor creep resistance, large molding shrinkage, and poor dimensional stability; so polypropylene raw materials cannot If it is directly used in the automotive field, it must be modified, and most of them are added with inorganic fillers or tougheners to adjust the molding shrinkage of the material, so as to achieve the requirements of dimensional stability and good toughness. However, this will lead to an increase in the density of the molding material, which is not conducive to the overall lightweight of the car.

Contents of the invention

The purpose of the present invention is to provide a kind of modified polypropylene plastic for automobile roof and its preparation method.

In order to realize the purpose of the present invention, the present invention is implemented through the following schemes:

A modified polypropylene plastic for the roof of an automobile, made of the following raw materials in parts by weight: 100-110 copolymerized polypropylene, 12-15 homopolypropylene, 24-28 nanometer silicon carbide, PPS12-15, ethylene glycol 3 -5, zinc stearate 3-4, antioxidant RD 1-2, triethanolamine 1-2, active calcium carbonate 15-20, zinc oxide 4-7, aluminum nitride 4-6, butenedioic anhydride 2- 3. Additives 6-9;

Described auxiliary agent is made from the raw material of following weight part:

The modified polypropylene plastics for the automobile roof of the present invention is made by the following specific steps: heating copolymerized polypropylene and homopolypropylene to a molten state, adding anti-aging agent RD, triethanolamine, active calcium carbonate, zinc oxide, nitrogen Aluminum and butenedioic anhydride are stirred and kneaded for 20-25 minutes; then add additives and other remaining ingredients, heat to 240-250°C, stir for 8-10 minutes, send them to a twin-screw extruder for melt extrusion and granulation, and cool Instantly.

The excellent effects of the present invention are: the present invention has lubricity, wear resistance, strong corrosion resistance, high temperature resistance to oxidation, good scratch resistance, rapid cooling and rapid heating, will not be broken, good dimensional stability, mechanical High strength, low cost and excellent comprehensive performance.

Detailed ways

The present invention will be described in detail below through specific examples.

A modified polypropylene plastic for the roof of an automobile, which is made of the following raw materials in parts by weight (kg): copolymerized polypropylene 100, homopolypropylene 12, nanometer silicon carbide 24, PPS 12, ethylene glycol 3, zinc stearate 3. Antiaging agent RD 1, triethanolamine 1, active calcium carbonate 15, zinc oxide 4, aluminum nitride 4, butenedioic anhydride 2, additive 6;

The auxiliary agent is made of the following raw materials in parts by weight (kg): clay 10, corundum powder 3, antioxidant ODA 1, titanate coupling agent TMC-TTS 3, ammonium dihydrogen phosphate 1, magnet 4, stearate Zinc acid 2, triethyl citrate 35, propyl gallate 3, nano titanium dioxide 0.2, nano diatomite powder 1, coix seed oil 3, vanadium diboride 1, epicatechin 2; the preparation method is to mix clay, Put the magnet into the calcination furnace and calcinate at 720-740°C for 2-3 hours, then take it out, soak it in 10-15% hydrochloric acid solution for 2-3 hours, filter to get the filter residue, wash it with clean water, and dry it 1. Grinding to 400-600 mesh powder; mixing the obtained powder with other remaining ingredients, heating to 60-70°C, stirring for 40-50 minutes, cooling, and grinding to form a slurry.

The modified polypropylene plastics for the automobile roof of the present invention is made by the following specific steps: heating copolymerized polypropylene and homopolypropylene to a molten state, adding anti-aging agent RD, triethanolamine, active calcium carbonate, zinc oxide, nitrogen Aluminum and butenedioic anhydride are stirred and kneaded for 20-25 minutes; then add additives and other remaining ingredients, heat to 240-250°C, stir for 8-10 minutes, send them to a twin-screw extruder for melt extrusion and granulation, and cool Instantly.

The obtained product is tested according to the ISO standard, and the elastic modulus obtained through the test is 28420-46060Mpa, the bending strength is 147MPa, and the compressive strength is 490MPa.

Claims (2)

1. a roof of the vehicle modified polypropylene plastic, it is characterized in that, by the raw material of following weight part, made: Co-polypropylene 100-110, homo-polypropylene 12-15, nanometer silicon carbide 24-28, PPS12-15, ethylene glycol 3-5, Zinic stearas 3-4, anti-aging agent RD 1-2, trolamine 1-2, activated Calcium carbonate 15-20, zinc oxide 4-7, aluminium nitride 4-6, maleic acid anhydride 2-3, auxiliary agent 6-9;

Described auxiliary agent is made by the raw material of following weight part: described auxiliary agent is made by the raw material of following weight part: clay 10-12, lapis amiridis 3-4, anti-aging agent ODA 1-2, titanate coupling agent TMC-TTS 3-4, primary ammonium phosphate 1-2, magnetite 3-4, Zinc Stearate 2-3, triethyl citrate 35-40, Tenox PG 3-4, nano titanium oxide 0.2-0.3, nano diatomite powder 1-2, coix seed oil 2-3, vanadium diboride 1-2, l-Epicatechol 2-3; Preparation method sends into clay, magnetite in calcining furnace and calcine 2-3 hour at 720-740 ℃, then, takes out, and sends in the hydrochloric acid soln of 10-15% and soaks 2-3 hour, filters, and obtains filter residue, with clear water, cleans, and dries, grinds to form 400-600 order powder; Gained powder mixes with other remaining component, is heated to 60-70 ℃, and stirring reaction 40-50 minute is cooling, grinds to form slurry, obtains.

2. roof of the vehicle modified polypropylene plastic according to claim 1, it is characterized in that, by following concrete steps, made: Co-polypropylene, homo-polypropylene are heated to molten state, add anti-aging agent RD, trolamine, activated Calcium carbonate, zinc oxide, aluminium nitride, maleic acid anhydride to stir and mediate 20-25 minute; Add again auxiliary agent and all the other remaining components, be heated to 240-250 ℃, stir 8-10 minute, send into and on twin screw extruder, melt extrude granulation, cooling and get final product.