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Microporous high-expansion adhesive tape and preparation method thereof

A high-expansion, adhesive tape technology, applied in the field of automotive adhesive tape, can solve the problems of optimizing automobile NVH performance, low expansion ratio, and high expansion ratio, achieving good market application prospects, high production efficiency, and low density.

Active Publication Date: 2020-05-19
北京龙苑伟业新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Based on the existing problems in the prior art, the purpose of the present invention is to provide a microporous high-expansion adhesive tape and its preparation method, which can solve the problem of low expansion ratio and low expansion ratio in the foaming materials of existing automotive adhesive tapes. The contradiction of high aperture and large diameter is not conducive to optimizing the NVH performance of the car

Method used

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  • Microporous high-expansion adhesive tape and preparation method thereof

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preparation example Construction

[0025] The embodiment of the present invention also provides a preparation method of a microporous high-expansion adhesive tape, which is used to prepare the above-mentioned high-expansion adhesive tape. The raw materials are obtained according to the above-mentioned high-expansion adhesive tape formula, and an internal mixer, an open mill, and a single-screw extruder are used to prepare the method. The equipment composed of the machine includes the following steps:

[0026] Step 1) mixing the raw rubber, plasticizer and filler in an internal mixer at 110-120°C for 10-15 minutes for mastication, and then cooling down to room temperature to obtain the masticated rubber;

[0027] Step 2) Mixing the plasticized rubber obtained in the above step 1 with foaming agent, vulcanizing agent, vulcanization accelerator and vulcanization activator in an open mill at an environment of 60°C or less for 10 to 15 minutes to obtain a uniform mixed rubber ;

[0028] Step 3) Extrude the compound...

Embodiment 1

[0034] The present embodiment provides a kind of microporous high-expansion adhesive tape, and its preparation method comprises the following steps:

[0035] Step 1) mastication: in parts by weight, at first 40 parts of EPDM rubber, 40 parts of thermoplastic styrene-butadiene rubber, 10 parts of polyolefin thermoplastic elastomers and 60 parts of paraffin oil are added in the internal mixer, Mixed at 120°C for 10 minutes, visually inspected that the rubber and plastic blended into a homogeneous phase, then added 30 parts of calcium carbonate, mixed at 120°C for 5 minutes, the glue came out, passed through the two-roller open mill several times to accelerate cooling, and stood still to obtain plastic rubber;

[0036] Step 2) mixing: the plasticized rubber prepared in the above step 1, 1.2 parts of sulfur, 0.5 parts of 2-thiol phenylpropanthiazole, 2 parts of zinc dibutyldithiocarbamate, 2 parts of tetramethyl disulfide Add thiuram, 10 parts of azodicarbonamide, 3 parts of 4,4'...

Embodiment 2

[0040] The present embodiment provides a kind of microporous high-expansion adhesive tape, and its preparation method comprises the following steps:

[0041]Step 1) Mastication: In parts by weight, first add 40 parts of EPDM rubber, 10 parts of styrene-butadiene rubber, 40 parts of thermoplastic styrene-butadiene rubber, 10 parts of polyolefin thermoplastic elastomers and 60 parts of naphthenic oil Put it into the internal mixer, knead at 120°C for 10 minutes, visually observe that the rubber and plastic are blended into a homogeneous phase, then add 30 parts of calcium carbonate, knead at 120°C for 5 minutes, the glue comes out, and pass through the two-roller open mill several times to accelerate Lower the temperature and leave it to stand to obtain plasticized rubber;

[0042] Step 2) mixing: the plasticized rubber prepared in the above step 1, 1.2 parts of sulfur, 0.8 parts of 2-thiol phenylpropanthiazole, 2.2 parts of zinc dibutyldithiocarbamate, 2 parts of tetramethyl di...

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Abstract

The invention discloses a microporous high-expansion adhesive tape and a preparation method thereof. The microporous high-expansion adhesive tape is prepared from the following raw materials in partsby weight: 50-100 parts of raw rubber, 40-60 parts of a plasticizer, 10-15 parts of a composite foaming agent, 30-50 parts of a filler, 0.8-1.6 parts of a vulcanizing agent, 2-8 parts of a vulcanization accelerator and 6-12 parts of a vulcanization activator. The microporous high-expansion adhesive tape disclosed by the invention has the advantages of high foam expansion and small pore diameter; in addition, the pore size can be randomly adjusted according to the requirement of the sound absorption coefficient, the sealing performance is excellent, and the microporous high-expansion adhesive tape is a 2D type automobile cavity blocking material withextremely high application value.

Description

technical field [0001] The invention relates to the field of adhesive tapes for automobiles, in particular to a microporous high-expansion adhesive tape used for blocking the cavity of automobiles to optimize its NVH performance and a preparation method thereof. Background technique [0002] When evaluating the performance of a car, one thing is very important, that is, good NVH performance. As an important part of NVH performance, the upper and lower side beams of the A, B, and C pillars of the body and the lower part of the fender are usually blocked by the high temperature expansion of the 2D foam tape and the 3D cavity barrier to improve the sealing performance. and sound-absorbing properties. [0003] 2D type foam tape is mainly used for A-pillars or parts with small cavities, while 3D type cavity barriers are mainly used for parts with larger cross-sections. [0004] 2D foam tape made of EPDM rubber and thermoplastic styrene-butadiene rubber has been widely used in a...

Claims

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Application Information

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IPC IPC(8): C08L91/06C08L23/16C08L9/06C08L23/02C08K3/26C08K3/06C08K5/47C08K5/39C08K5/40C08K13/02C08J9/10
CPCC08J9/103C08J9/105C08J2391/06C08J2423/16C08J2409/06C08J2203/04C08J2203/18C08K2003/265C08K3/06C08K5/47C08K5/39C08K5/40C08K13/02
Inventor 刘成秦成博聂志华张晓光王梓人
Owner 北京龙苑伟业新材料有限公司
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