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Nano-level water proof micro powder product and its preparation method

A nano-scale, product technology, applied in the field of nano-scale waterproof micro-powder products, can solve the problems of low application value and low waterproof efficiency, and achieve the effects of low cost, easy shrinkage and cracking, and strong durability

Inactive Publication Date: 2004-07-21
闫新育 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But because the powder is too coarse, above 300 microns, the waterproof efficiency is not high, and the application value is not great

Method used

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  • Nano-level water proof micro powder product and its preparation method
  • Nano-level water proof micro powder product and its preparation method
  • Nano-level water proof micro powder product and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0032] This example is a nano-scale micropowder product made from monomethyltrichlorosilane as a raw material. Specific preparation process:

[0033] 1. First add 600 grams of water to a one-liter No. 1 beaker, then slowly add 200 grams of monomethyltrichlorosilane dropwise and stir continuously at a speed of 250 rpm, while monitoring the temperature with a thermometer and controlling the reaction with the flow rate of the reaction solution The temperature is 70±5°C. After the reaction liquid is added dropwise, continue to stir and keep the above temperature for half an hour;

[0034] 2. Transfer the reaction product into a Buchner funnel equipped with slow filter paper to filter, and wash the precipitate with tap water several times until it is nearly neutral;

[0035] 3. Add 1800 grams of 40% sodium hydroxide to the beaker 3, then add the above-mentioned nearly dry precipitated product, stir at the original stirring speed, quickly heat up to 90±5°C on a flat electric furnac...

example 2

[0041] In this example, 160 grams of monomethyltrichlorosilane and 13 grams of dimethyldichlorosilane, 5 grams of trimethylchlorosilane, 14 grams of monoethyltrichlorosilane, 4 grams of monophenyltrichlorosilane and 4 Gram-vinyltrichlorosilane is mixed, and other steps and conditions are with example 1. A white nano-scale micropowder product is obtained.

example 3

[0043] This example is an application example.

[0044] The product of example 1 is added in the ordinary cement with the add-on of 0.05%, 0.10%, 0.20% respectively and mixes evenly, detects through Heilongjiang Provincial Water Conservancy Engineering Quality Inspection Center Station, test report is as follows:

[0045] Test conditions: 1. The cement is No. 425 ordinary Portland cement of Harbin Cement Plant; 2. The sand is the cement inspection standard sand; 3. The water-cement ratio is 0.50; 4. The mortar-sand ratio is 1:2.5.

[0046] Nano

Powder content (%)

Flexural strength (MPa)

Compressive strength (MPa)

Impermeability grade

(MPa)

7d

28d

7d

28d

0

3.5

6.2

17.5

32.5

0.5

0.05

3.4

6.2

17.3

29.0

0.5

0.10

3.6

6.3

18.4

32.7

0.7

0.20

4.0...

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Abstract

A water-proof nanoparticle for building materials, paint, cement, etc is prepared through hydrolysis polymerizing of hydrolytic polymerizing of methyl trichlorosilane or the mixture of methyl trichlorosilane and dimethyl dichlorosilane, trimethyl chlorosilane, ethyl trichlorosilane, phenyl trichlorosilane, or vinyl trichlorosilane at 50-80 deg.C in acidic condition, washing, filtering, dissolving in alkali solution, reacting on acid to generate deposit, washing, filtering and airflow drying. Its advantages are high water-proof effect and low cost.

Description

technical field [0001] The present invention relates to organic high molecular polymer technology, specifically, it is a kind of nanoscale waterproof micropowder product of organosilicon modified polymer, and its general chemical formula is (RSiO 1.5 ) n . Background technique [0002] Organochlorosilane monomer is an important industrial raw material in the silicone industry. At present, it can be used to prepare a variety of silicone industrial products, such as silicone oil, silicone resin and silicone rubber. Among them, the hydrolytic condensation method is used to prepare polymethylsiloxane (CH 3 SiO 1.5 ) n The waterproof coarse powder has been applied. The specific preparation method: slowly drip or spray monomethyltrichlorosilane into water (tap water) under stirring conditions, and use the acidity of reaction precipitation and the temperature generated by exothermic reaction to prepare into polymethylsiloxane (CH 3 SiO 1.5 ) n The precipitated product is wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/00C09K3/18
Inventor 阎新育
Owner 闫新育
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