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Water repellent for concrete

A technology of water repellent and surfactant, which is applied in the field of compositions for treating porous substrates, which can solve the problems of lack of reactivity and penetration depth of emulsions, and inability to meet long-term protection requirements.

Inactive Publication Date: 2017-09-05
DOW SILICONES CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the emulsions according to this publication lack reactivity and penetration depth to meet the requirements for long-term protection of concrete structures or other porous building materials

Method used

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  • Water repellent for concrete
  • Water repellent for concrete
  • Water repellent for concrete

Examples

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example

[0059] These examples are intended to illustrate the invention and should not be construed as limiting the scope of the invention described in the claims.

[0060] Volatile organic compound content VOC

[0061] Determining volatile organic (compound) content (VOC) for regulatory purposes is somewhat complicated because, according to the Environmental Protection Agency in the United States and other countries and many local governments, VOC is expressed in mass / volume (i.e., g / L ) representation; therefore, VOC calculations may involve determination of individual component densities, account for components that are not included, and in water-based formulations also need to exclude water - however, active ingredients or mixtures or emulsions of active ingredients or mixtures The VOC mainly also depends on the volatile content of the active ingredients. For the present invention, the method ASTM 5095: "Standard Test Method for Determination of the Nonvolatile Content (NVC) in ...

example 2

[0094] The reaction mixture according to Comparative Example 1 was vacuum stripped and the product had a viscosity of 47 mPas at 20°C, a density of 0.924 g / mL at 20°C and a volatile content of 5% according to ASTM D5905. Therefore, the VOC content of the fluid is 49.6 g / L.

example 3

[0098] The reaction mixture according to Comparative Example 2 was vacuum stripped and the product had a viscosity of 25 mPas at 20°C, a density of 0.937 g / mL at 20°C, and a volatile content of 10% according to ASTM D5905. Therefore, the VOC content of the fluid is 93.7 g / L.

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Abstract

The invention provides a water repellent composition for treating porous substrates comprising an emulsion which includes water, at least one surfactant, and a siloxane copolymer having the formula (I) wherein R is an alkyl radical having 1 to 3 carbon atoms; a has a value of from 1 to 12; R' is an alkyl radical having 8 to 12 carbon atoms, b >= 2; (a+b) is at least 5. This composition shows a good depth of penetration of porous substrates especially reinforced concrete and has a low Volatile Organic Content to ASTM D 5095.

Description

[0001] Instructions for Divisional Application [0002] This application is a divisional application of an invention patent application entitled "Concrete Waterproofing Agent" with the filing date of September 19, 2012, the international application number of PCT / US2012 / 056109, and the national application number of 201280045352.8 after entering the Chinese national phase. . [0003] Cross-references to related patent applications and statements regarding federally funded research [0004] none. technical field [0005] The present invention relates to siloxane copolymer masonry waterproofing compositions, and more particularly to compositions for treating porous substrates such as concrete, which compositions are emulsions containing, for example, linear methyl hydrogen - Copolymers of methylalkylsiloxanes. Background technique [0006] Applying or improving water resistance to substrates is desirable for a variety of substrates, including organic or inorganic building e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B41/64C08G77/38
CPCC04B24/42C04B41/64C08G77/045C04B41/009C04B28/02C04B28/14C04B2111/0062C04B2111/27C08G77/16C08G77/38C08L83/04C04B41/4961Y02W30/91C04B41/502C04B2103/40C04B20/0048C04B18/26C08L83/00
Inventor 李洛明Y·刘蒂莫西·罗戈M-J·萨拉辛大卫·塞利A·斯塔默保罗·凡道特
Owner DOW SILICONES CORP