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Organosilicon joint sealing material with low cost and high performance

A technology of joint filler and silicone, which is applied in the field of joint filler, can solve the problems of high price, unavailable, no products, etc., and achieve the effect of low production cost, excellent bonding performance and stable quality

Inactive Publication Date: 2012-08-08
CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price is expensive because they generally use expensive raw materials-chain extenders when making this joint compound
Chain extenders that can be used in the production of low modulus and high elongation silicone sealants are not available in China so far and cannot be purchased

Method used

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  • Organosilicon joint sealing material with low cost and high performance
  • Organosilicon joint sealing material with low cost and high performance
  • Organosilicon joint sealing material with low cost and high performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) get raw material by table 2;

[0046] (2) Add α, ω-dihydroxy polydimethylsiloxane and filler reinforcing agent into a vacuum kneader, dehydrate and blend for 60 minutes at 100°C with a vacuum degree of 0.06Mpa, and cool naturally to room temperature to obtain Binder;

[0047] (3) Move the base material into the high-speed dispersion mixer, and at room temperature, add 6 kg of cross-linking agent, coupling agent, polydimethylsiloxane, deep cross-linking accelerator, and tackifier into the high-speed dispersion mixer , mixed with the base material at high speed, and the chemical reaction was carried out for 20 minutes at a vacuum degree of 0.06Mpa and a rotation speed of 300rpm.

[0048](4) Turn on the high-speed dispersing mixer, add a total of 0.5 kilograms of the crosslinking accelerator dibutyltin dilaurate, carry out the chemical reaction for 50 minutes under the same conditions as (3), and obtain the present invention.

Embodiment 2

[0050] (1) get raw material by table 2;

[0051] (2) Add α, ω-dihydroxy polydimethylsiloxane and filling reinforcing agent into a vacuum kneader, dehydrate and blend at 150°C and a vacuum of 0.095Mpa for 180min, and cool naturally to room temperature to obtain Binder;

[0052] (3) Move the base material into the high-speed dispersion mixer, and at room temperature, add the crosslinking agent, coupling agent, polydimethylsiloxane, deep crosslinking accelerator, and tackifier into the high-speed dispersion mixer, and mix with the base The materials were stirred and mixed at a high speed, and the chemical reaction was carried out for 50 minutes at a vacuum degree of 0.095Mpa and a rotation speed of 800rpm.

[0053] (4) Turn on the high-speed dispersing mixer, add a total of 0.05 kilograms of the crosslinking accelerator dibutyltin dilaurate, carry out the chemical reaction for 30 minutes under the same conditions as (3), and obtain the present invention.

Embodiment 3

[0055] (1) get raw material by table 2;

[0056] (2) Add α, ω-dihydroxy polydimethylsiloxane and filler reinforcing agent into a vacuum kneader, dehydrate and blend at 110°C for 80 minutes at a vacuum degree of 0.09Mpa, and cool naturally to room temperature to obtain Binder;

[0057] (3) Move the base material into the high-speed dispersion mixer, and at room temperature, add the crosslinking agent, coupling agent, polydimethylsiloxane, deep crosslinking accelerator, and tackifier into the high-speed dispersion mixer, and mix with the base The materials were stirred and mixed at high speed, and the chemical reaction was carried out for 50 minutes at a vacuum degree of 0.085Mpa and a rotation speed of 700rpm;

[0058] (4) Turn on the high-speed dispersing mixer, add a total of 0.1 kg of the crosslinking accelerator dibutyltin dilaurate, carry out the chemical reaction for 30 minutes under the same conditions as (3), and obtain the present invention.

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Abstract

The invention provides organosilicon joint sealing materials with low cost and high performance. A product prepared from the organosilicon joint sealing materials comprises the following components in proportion by weight: 100 alpha, omega-dicarboxylic dimethyl polysiloxane, 5 to 70 filler reinforcement agents, 0.5 to 12 crosslinking agents, 1 to 5 o coupling agents, 41 to 80 dimethyl polysiloxane, 1 to 8 deep-layer crosslinking accelerant and 6 to 14 tackifier, wherein the alpha, omega-dicarboxylic dimethyl polysiloxane and the filler reinforcement agents are added into a vacuum kneader, dehydrated and mixed to obtain base materials, the base materials are moved in a high-speed dispersator, and stirred and mixed with other components in a high-speed mode, and finally the crosslinking accelerants are added to carry out chemical reaction to obtain the joint sealing materials. Various raw materials used by the invention can be bought in the market; thereby the invention has low manufacturing cost, high performance in various aspects, low modulus, high extension percentage, normal temperature crosslinking, good bonding effect and sealing effect on cement and earth, good elastic restitution capability, embedding resistance, weather resistance and long service life.

Description

technical field [0001] The invention relates to a joint filler for highway cement concrete pavement, in particular to a low modulus, high elongation, normal temperature cross-linking and long-life organic silicon joint filler. Background technique [0002] Highway cement concrete pavement has many advantages such as high strength, water damage resistance, stable performance, low daily maintenance cost, long service life, saving driving fuel consumption, etc., and has broad development and application prospects. In order to adapt to the expansion and deflection caused by temperature changes and repeated vehicle loads, the road cement concrete pavement needs to be equipped with joints, including expansion joints (expansion joints, contraction joints) and construction joints. The joint is the weak link of the cement concrete pavement: ground water will infiltrate into the pavement base under the cement concrete pavement from the joint, resulting in a decrease in the strength of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/10C08L83/06C08K13/02C08K5/5465
Inventor 张东长王进勇刘茂光龙丽琴
Owner CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
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