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Expandable master batch, expandable material and manufacturing method thereof

An intumescent material, expandable technology, applied in vehicle parts, transportation and packaging, etc., can solve the problems of blending, reduce fluidity, reduce foaming stability and repeatability, and achieve improved fluidity and reduced product quality. Defects, the effect of saving energy consumption and labor costs

Inactive Publication Date: 2010-09-22
上海子元汽车零部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many defects in this technology. For example, cross-linked polymers such as cross-linked polyethylene are used, which reduces fluidity; Improve the foaming stability and repeatability of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Embodiment 1: Preparation of expandable expansion masterbatch

[0079] With the EVA produced by France Atofina Company, the trade mark is Evatane 28-25, 2kg, the foaming agent produced by Yonghe Fine Chemical Co., Ltd., p-diphenylsulfonyl hydrazide, 2kg, the foaming agent produced by Jiangxi Electrochemical Plant Azodicarbonamide, 2.5kg, DCP produced by Shanghai Gaoqiao Petrochemical Co., Ltd., 0.52kg, zinc stearate produced by Changzhou Wujin Konka Chemical Co., Ltd., 0.7kg, anti-oxidant produced by Zhejiang Huangyan Zhedong Rubber Auxiliary Co., Ltd. Oxygen agent 1010, 0.68kg, polyethylene wax produced by Chengdu Tongli Auxiliary Co., Ltd., the brand is TL--1, 0.86kg, after mixing evenly, use a co-rotating parallel twin-screw extruder produced by Jiangsu Xinda Technology Co., Ltd. SHJ-35 is granulated to produce expandable expandable masterbatch with uniform and compact particles.

Embodiment 2

[0080] Embodiment 2: Preparation of expandable expansion masterbatch

[0081] The EBA brand produced by the French Atofina Company is 35BA40, 2kg, the N,N'-dinitrosopentamethylenetetramine produced by Jiangsu Yake Technology Co., Ltd., 2kg, and the blowing agent produced by Jiangxi Electrochemical Plant Azodicarbonamide, 2.5kg, DCP produced by Shanghai Gaoqiao Petrochemical Company, 0.25kg, BPO produced by Changshu Qiangsheng Chemical Co., Ltd., 0.41kg, zinc stearate produced by Changzhou Wujin Konka Chemical Co., Ltd., 0.45kg, Urea 0.42kg produced by Yixing Tianpeng Fine Chemical Co., Ltd., antioxidant 264, 0.85kg produced by Zhejiang Huangyan Zhedong Rubber Auxiliary Co., Ltd., polyethylene wax produced by Chengdu Tongli Auxiliary Co., Ltd., the brand is TL-- 1, 0.92kg, 1.2kg of 800-mesh heavy calcium carbonate produced by Shanghai Didao Technology Co., Ltd., 0.15kg of ultramarine blue produced by Wenzhou Baise Fine Pigment Chemical Co., Ltd. Granulate into parallel twin-sc...

Embodiment 3

[0084] Embodiment 3: the preparation of expandable expandable material

[0085] With 200g of the expandable expansion masterbatch obtained in Example 1, the EBA brand produced by DuPont Company of the United States is 3717AC, 1000g, and the EMA brand produced by DuPont Company of the United States is 1820AC, 1000g. After mixing evenly, use the injection molding machine produced by Ningbo Haitian Group The sample was made by injection molding of XA900. The surface of the sample was smooth and compact without foaming. Put the sample in an oven with a temperature of 175±2°C and bake it for 25 minutes. The product is completely foamed and cooled to room temperature. It is measured that its volume is 959% larger than its original volume, that is to say, its expansion rate is 959%. . According to the same formula and the same process, another production and inspection was carried out, and the expansion ratio was measured to be 947%.

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PUM

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Abstract

The invention provides an expandable master batch. The expandable master batch comprises: (1) carrier resin being one or more of ethylene-vinyl acetate copolymer, ethylene-butyl acrylate copolymer, ethylene-methyl acrylate and low density polyethylene; (2) crosskicking agent; (3) antioxidant; (4) foaming agent; and (5) blowing promoter. The invention also provides an expandable material manufactured by the expandable master batch and a manufacturing method thereof.

Description

technical field [0001] The invention relates to an expandable expandable masterbatch, an expandable expandable material and a production method thereof, in particular to an expandable expandable masterbatch, an expandable expandable material and a method for insulating such as sound insulation, heat insulation, etc. Manufacturing method. Background technique [0002] Cavities will be formed during the welding process of cars, especially self-supporting bodies, which will form many cavity structures. For example, the so-called A-pillars, B-pillars, C-pillars, underframes and roof frames of passenger vehicles. During normal vehicle operation, sounds and disturbing noises are propagated through these cavities or are formed by air turbulent vibrations. In order to reduce this disturbing noise, the above-mentioned cavities can be filled with a sealing material. This filler material blocks or absorbs noise and vibration. In addition, it can also block humidity and dust from en...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L31/04C08L33/08C08L23/06B29B9/06C08L101/00B29C45/00B60R13/08
Inventor 钱时杰陈才海
Owner 上海子元汽车零部件有限公司
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