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Preparation method of low-smoke flame-retardant modified polyethylene foaming material for cavity of automobile

A polyethylene foaming, low-smoke flame-retardant technology, which is applied in the field of foaming material preparation, can solve the problems of insufficient contribution to the realization of high magnification, material cracking and hard cracking, flammable products, etc. The effect of high foaming ratio and good conformability

Active Publication Date: 2014-03-05
三友(天津)高分子技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the material is prone to cracking and hard solution after foaming, it is easy to fall off in the cavity, and the product is flammable. Linear low-density polyethylene resin cannot solve these problems well, and at the same time, it does not contribute enough to the realization of height magnification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: The preparation method of low-smoke flame-retardant modified polyethylene resin foaming material for automobile cavity is carried out according to the following steps:

[0026] The mass percentage of each component of the foam masterbatch: linear low density polyethylene resin 40.4%; Evapine rubber 20.2%; EPDM rubber 15.15%; Olefin elastomer resin 10.1%; Butadiene rubber 10.1%; Talc Powder 4.04%.

[0027] Preparation process of foaming masterbatch: first accurately weigh 20Kg of linear low-density polyethylene resin (brand 607, Beijing Yanshan Petrochemical), 10Kg of Evapin rubber (brand 500HV, Bayer, Germany), olefin elastomer resin (brand VM3000, USA) according to mass percentage Exxon Mobil) 5Kg, butadiene rubber (brand BR9000 Takahashi Petrochemical Petrochemical) 5Kg, EPDM rubber (brand KEP330 Kumho, Korea) 7.5Kg and talcum powder (800 mesh) 2Kg, mixed in XK-250 Mixing is carried out in the machine, the feeding sequence is to put in linear low-densit...

Embodiment 2

[0032] Embodiment 2: The preparation method of low-smoke flame-retardant modified polyethylene resin foaming material for automobile cavity is carried out according to the following steps:

[0033] The mass percentage and preparation process of the foaming masterbatch are exactly the same as in Example 1.

[0034] The mass percentage of each component of the foaming material mixture: foaming masterbatch 75.86%, azodimethylamine 15.33%; zinc oxide 0.77%; stearic acid 0.38%; dicumyl peroxide 3.07%, trimethylolpropane Trimethacrylate (TMPTMA) 3.83%; Sulfur 0.77%.

[0035] Foaming material mixing process: Weigh 24.75Kg of masterbatch and put it into XK-360 open rubber mixer to start training, add 5kg of azodimethylamine (brand 6000 Hangzhou Haihong) and zinc oxide (content ≥ 90%) 0.25 Kg, stearic acid (melting point 69.6±2°C) 0.125Kg, dicumyl peroxide (Shanghai Gaoqiao) 1Kg, trimethylolpropane trimethacrylate (TMPTMA) (Shanghai Fangruida Chemical Co., Ltd. ) 1.25Kg and sulfur 0....

Embodiment 3

[0038] Embodiment 3: The preparation method of low-smoke flame-retardant modified polyethylene resin foaming material for automobile cavity is carried out according to the following steps:

[0039] The mass percentage and preparation process of the foaming masterbatch are exactly the same as in Example 1.

[0040] The mass percentage of each component of the foaming material mixture: foaming masterbatch 73.72%; azodimethylamine 11.17%; 4,4-disulfonylhydrazide diphenyl ether (OBSH) 7.45%; zinc oxide 1.12%; stearic acid 0.74%; Dicumyl peroxide 2.23%; Trimethylolpropane trimethacrylate (TMPTMA) 2.98%; Sulfur 0.6%.

[0041] Foaming material mixing process: Weigh 24.75Kg of foaming masterbatch and put it into XK-360 open rubber mixing machine for practice, add 3.75kg of azodimethylamine (brand 6000 Hangzhou Haihong), 4,4-disulfone Hydrazide diphenyl ether (BOSH) (Hangzhou Haihong) 2.5kg, foaming aid zinc oxide (content ≥ 90%) 0.375Kg, stearic acid (melting point 69.6±2°C) 0.25Kg, ...

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Abstract

The invention provides a preparation method of a low-smoke flame-retardant modified polyethylene foaming material for a cavity of an automobile. The method comprises the steps: firstly, preparing a foaming masterbatch by using a plastic mixer, that is, placing linear low density polyethylene resin and a nucleating agent into an internal mixer, adding levapren rubber and olefin elastomer resin to be internally mixed, then, internally mixing ethylene-propylene-diene rubber and butadiene rubber in the internal mixer, and finally, discharging to obtain the foaming masterbatch; and then, preparing a foaming material mixture by using an open mill, that is, mixing the foaming masterbatch, a foaming promoter, a crosslinking agent and a crosslinking promoter in the open mill, delivering the foaming material mixture into an extruder, and carrying out extrusion molding on the foaming material mixture to form a sheet, i.e., the low-smoke flame-retardant modified polyethylene foaming material for the cavity of the automobile. The foaming material has the height ratio of larger than or equal to 800% and the foaming ratio of over 3000% at the temperature of 140-180 DEG C, so that the expected excellent effects of low smoke, flame retardance and soft and hard-knot-free surface after foaming are achieved, and the environment friendliness and safety of the automobile are improved.

Description

technical field [0001] The invention relates to the preparation of foaming materials, in particular to a method for preparing low-smoke flame-retardant modified polyethylene foaming materials for automobile cavities. Background technique [0002] With the vigorous development of the car industry, people are not only interested in the intuitive visual experience such as the shape and color of the car, but also attach great importance to the comfort and safety that the car brings us. A key point to measure comfort is The vibration and noise generated by the car during driving, so it is very important to reduce the cavity resonance generated by the car during driving, and reduce the noise pollution inside the car cavity due to air circulation and vibration friction. And the flame retardancy of the materials used in automobiles must also be paid attention to. [0003] At present, EVA is generally used as the main material for the foaming material used in automobile cavities...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L23/16C08L9/00C08J9/10B29C47/92B29B7/28B29B7/72B29C48/92
CPCB29B7/7428B29C48/022C08J9/0061C08J9/103C08J9/105C08J2203/04C08J2323/08C08L23/0815C08L2201/02C08L2203/14C08L2205/025C08L2205/035C08L23/0853C08L23/16C08L9/00C08K13/02C08K3/34C08L31/04
Inventor 李崇李士学王永明高之香李建武吴子刚张卫军唐斌
Owner 三友(天津)高分子技术有限公司
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