High-stability concrete silicone joint glue and preparing method thereof

A high stability, concrete technology, applied in adhesives, polymer adhesive additives, non-polymer adhesive additives, etc., can solve the problems of easy pollution, increased crosslink density, increased modulus, etc., to achieve performance And the effect of improved stability, excellent plasticizing performance, and simple preparation method

Active Publication Date: 2015-12-09
CHENGDU GUIBAO SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing silicone joint adhesives have considerable defects: 1. In order to reduce costs or increase construction performance, a large amount of plasticizers (such as white oil, low-viscosity methyl silicone oil, etc.) are often added to the joint adhesives. , resulting in the comprehensive performance of the joint adhesive not meeting the requirements for use
2. The "oil" contained in the silicone sealant is easy to dissociate to the dust adhered to the surface of the colloid due to static electricity, and the dust will spread to the surrounding of the bonding surface with the rain and win

Method used

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  • High-stability concrete silicone joint glue and preparing method thereof
  • High-stability concrete silicone joint glue and preparing method thereof
  • High-stability concrete silicone joint glue and preparing method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0049] Preparation of raw materials:

[0050] Add 209.9g (4.58mol) of absolute ethanol and 500mL of petroleum ether into a 3L three-necked flask, keep the nitrogen flow rate at 0.1ml / min, stir evenly in an ice-water bath, control the internal temperature at about 10°C, and then add 300g of (1.85mol) (chloromethyl)methyldichlorosilane, after about 1 hour of dropwise addition, the reaction was continued at 40°C for 3 hours. Then, the solvent and unreacted ethanol are evaporated under a vacuum of 0.05Mpa, and then rectified at normal pressure, and the product at 94-95 ° C is collected to obtain 320 g of colorless and transparent (chloromethyl) methyldiethoxysilane. The yield 96%.

[0051] Preparation of (Chloromethyl)methylethoxybutanoneoximinosilane

[0052] Add 300g (1.85mol) (chloromethyl)methyldichlorosilane, 500ml petroleum ether and 387.2g (3.83mol) triethylamine into a 3L three-necked flask, stir evenly in an ice-water bath, and control the internal temperature at 10 ℃,...

Embodiment 1

[0055] Put 290.8g (1.59mol) (chloromethyl) methyldiethoxysilane, 152.2g (1.75mol) morpholine, 178.2g (1.75mol) triethylamine, 0.4gKI and 800mL petroleum ether into a 3L three-necked flask , After reacting at 60°C for 4h under the protection of nitrogen. The triethylamine hydrochloride that generates is removed by filtration, and the filtrate is rotary evaporated to remove solvent and unreacted triethylamine and morpholine, and rectification, collect 125-132 ℃ / 10mmHg product, obtain orange-yellow transparent (morpholine methyl ) 294.1 g of methyldiethoxysilane, yield 79.4%.

[0056] 1 HNMR (300MHz, CDCl 3 ), δ3.67(4H), 3.60(4H), 2.45(4H), 2.20(2H), 1.10(6H), 0.16(3H)

[0057] Elemental analysis: C% 51.39, H% 9.88, N% 5.94.

Embodiment 2

[0059] Put 132g (0.5mol) (chloromethyl) methyl dibutylketoxime base silane, 46.2g (0.53mol) morpholine, 53.6g (0.53mol) triethylamine, 0.2gKI and 300ml petroleum ether into a 1L three-necked flask After reacting at 75°C for 6h under the protection of nitrogen, the generated triethylamine hydrochloride was removed by filtration, and the filtrate was rotary evaporated to remove the solvent, unreacted triethylamine and morpholine, and then rectified, and collected at 143-150°C / 8mmHg As a product, 118.2 g of orange-yellow transparent (morpholinomethyl)methyldibutanoximinosilane was obtained, with a yield of 74.9%.

[0060] 1 HNMR (300MHz, CDCl 3 ), δ3.63(4H), 2.40(14H), 2.18(2H), 1.08(6H), 0.18(3H)

[0061] Elemental analysis: C% 53.31, H% 9.25, N% 13.29.

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Abstract

The invention discloses high-stability concrete silicone joint glue and a preparing method thereof. The joint glue is prepared, by mass, 100 parts of alpha,omega-dihydroxyl polydimethylsiloxane, 50-150 parts of packing, 0.5-10 parts of thixotropic agent, 0.5-10 parts of chain extender, 5-15 parts of curing agent, 0.1-5 parts of thickening agent, 0.01-3 parts of catalyst and 1-10 parts of liquid chemigum. The alpha,omega-dihydroxyl polydimethylsiloxane, the thixotropic agent and the packing are made into a base material in a kneading machine, then the base material is transferred into a high-speed dispersing machine, residual raw materials are added, a reaction is conducted, and the joint glue is obtained. According to the high-stability concrete silicone joint glue and the preparing method thereof, the silicone joint glue is modified through the liquid chemigum, the specific chain extender is adopted, permanent toughness and the mechanical property retention rate are given to the joint glue, a plasticizer is not transferred, adhesion is not damaged, meanwhile, the adhesion strength is greatly improved, the ageing resistance is good, environmental friendliness is achieved, and pollution does not exist.

Description

technical field [0001] Embodiments of the present invention relate to the field of polymer materials, and more specifically, embodiments of the present invention relate to a high-stability concrete silicone joint adhesive and a preparation method thereof. Background technique [0002] In recent years, global resource and environmental crises have occurred frequently, making people pay more and more attention to saving resources and protecting the environment. Under the background that low-carbon economy has become the mainstream economic development mode in the world, my country can no longer seek economic leap-forward development at the expense of the environment. As one of the high energy consumption and high pollution industries, my country's construction industry must take the road of sustainable development, and the development of industrialized buildings is imminent. [0003] As a joint product of traditional buildings and industrialized buildings, it plays a decisive...

Claims

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Application Information

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IPC IPC(8): C09J183/06C09J11/08C09J11/04C09J11/06
Inventor 霍威张淼锋熊婷王有治
Owner CHENGDU GUIBAO SCI & TECH
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