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A kind of moisture detection method of silane paste

A detection method and silane technology, applied in the direction of removing certain components such as weighing, measuring devices, analyzing materials, etc., can solve the problem of less research on silane paste detection methods, and achieve the goal of being beneficial to popularization and construction quality control, Stable reproducibility and small error in test results

Active Publication Date: 2020-06-19
CCCC FOURTH HARBOR ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although silane paste has been used in my country for nearly 10 years, there are few researches on the detection method of silane paste, especially the moisture content detection of silane paste. Feasible method for detection of active ingredient content

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for detecting moisture in silane paste based on vacuum rotary evaporation, comprising the following steps:

[0032] (P1) adopt measuring range to be 1000g, the balance that precision is 0.01g weighs sample flask weight 364.12g;

[0033] (P2) put the silane paste sample A that the quality is 10.01 into the sample flask and record the quality 374.13g;

[0034] (P3) Set the constant temperature water (oil) bath temperature to 40°C; set the rotation speed to 100 rpm;

[0035] (P4) Use a vacuum pump to reduce the relative vacuum pressure in the system to ≤ -101.2kPa;

[0036] (P5) Reduced pressure and rotary evaporation for 6 hours and 30 minutes, until the paste completely disappeared and melted into clear liquid silane, and the evaporated water quality was 1.99;

[0037] (P6) After weighing, calculate the mass residual value of the sample to be 8.02, thereby obtaining a moisture content detection value of 19.88%, which corresponds to more than 80% of the product...

Embodiment 2

[0039] A method for detecting moisture in silane paste based on vacuum rotary evaporation, comprising the following steps:

[0040] (P1) adopt measuring range to be 1000g, the balance that precision is 0.01g weighs sample flask weight 364.12g;

[0041] (P2) put the silane paste sample B that the quality is 20.21 in the sample flask and record the quality 384.33g;

[0042] (P3) Set the constant temperature water (oil) bath temperature to 60°C; set the rotation speed to 60 rpm;

[0043] (P4) Use a vacuum pump to reduce the air pressure in the system to ≤ -101.2kPa;

[0044](P5) Reduced pressure and rotary evaporation for 3 hours, until the paste completely disappeared and melted into clear liquid silane, and the evaporated water quality was 4.03;

[0045] (P6) After weighing, the residual mass value of the sample is calculated to be 16.18, thereby obtaining a moisture content detection value of 19.94%, which corresponds to more than 80% of the product's nominal active ingredie...

Embodiment 3

[0047] A method for detecting moisture in silane paste based on vacuum rotary evaporation, comprising the following steps:

[0048] (P1) adopt measuring range to be 1000g, the balance that precision is 0.01g weighs sample flask weight 364.12g;

[0049] (P2) put the silane paste sample C that the quality is 18.26 into the sample flask and record the quality 382.38g;

[0050] (P3) Set the constant temperature water (oil) bath temperature to 50°C; set the rotation speed to 100 rpm;

[0051] (P4) Use a vacuum pump to reduce the air pressure in the system to ≤ -101.2kPa;

[0052] (P5) Reduced pressure and rotary evaporation for 4 hours, until the paste completely disappeared and melted into clear liquid silane, and the evaporated water mass was 3.72;

[0053] (P6) After weighing, the mass residual value of the sample is calculated to be 14.54, thereby obtaining a moisture content detection value of 20.37%, which corresponds to more than 80% of the product's nominal active ingredi...

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Abstract

The invention discloses a moisture detection method for silane paste. A sample to be detected is subjected to decompression and rotary evaporation to remove water by utilizing a rotary vacuum meter; the moisture detection method comprises the following steps: (1) weighing the weight of the sample to be detected and recording the weight; (2) setting the temperature of a water bath or an oil bath and controlling a rotary speed; (3) controlling relative air pressure in a flask to -110kPa to -81.2kPa; (4) carrying out the decompression and the rotary evaporation until the paste completely disappears and is melted into clarified liquid-state silane; (5) weighing the total weight of the flask and the sample to be detected and calculating the moisture content of the silane. The detection method disclosed by the invention is easy to popularize; the popularization of application of the silane paste and the construction quality control of the silane paste are facilitated; a the detection result has a small error and is accurate and reliable, and the repeatability of the result is very stable.

Description

technical field [0001] The invention relates to the technical field of detection of building materials, in particular to a method for detecting moisture in silane paste based on reduced-pressure rotary evaporation. Background technique [0002] Alkyl silane is not easy to undergo hydration reaction in neutral solution. Material engineers take advantage of this characteristic, by adding a small amount of special high-efficiency emulsifier (generally below 3%), and using a special emulsification process to realize the liquid silane Processed as a highly thixotropic silane paste. However, the formula of silane paste is not uniform, and the silane content of different manufacturers may vary greatly. Experiments have shown that in silane paste, the higher the silane content, the better the permeability; on the contrary, the higher the moisture content, the more the concrete capillary steam will be increased. Pressure, which hinders the penetration of silane. Therefore, the dete...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04
CPCG01N5/045
Inventor 岑文杰范志宏熊建波王胜年
Owner CCCC FOURTH HARBOR ENG CO LTD
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