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Organosilicon water-proof emulsion for building surface and preparation thereof

A waterproof emulsion and silicone technology, which can be used in antifouling/underwater coatings, latex paints, paints containing biocides, etc., and can solve problems such as poor permeability, pollution, and large environmental pollution

Inactive Publication Date: 2008-04-09
宁君 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyurethane or acrylic membranes are restricted in use due to serious environmental pollution; modified petroleum asphalt has less and less market share due to serious pollution and poor weather resistance; polymer membranes have high requirements for the appearance of waterproof substrates, Therefore, the construction efficiency is very low; organic fluorine compounds are very waterproof, but expensive
Neoprene, styrene-butadiene rubber, and cyanonitrile-butadiene latex usually form a layer of hydrophobic film on the surface of the substrate, but the permeability is poor, which affects the durable waterproof performance of the coating

Method used

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Examples

Experimental program
Comparison scheme
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preparation example Construction

[0022] The preparation method of silicone waterproof emulsion for building surface is further explained with typical examples.

[0023] The preparation method of silicone waterproof emulsion for building surface, the process steps are:

Embodiment 1

[0024] Example 1. Add 20 g of hydroxyl-containing siloxane, 10 g of p-alkylsulfonyl chloride with a carbon chain length of 4, and 1 g of triethylamine into a three-hole bottle with a stirrer, a thermometer and a reflux condenser. , heated up to 60°C, reacted for 10 hours, lowered to room temperature, added 40g of water, stirred for 1 hour, stood still for 1 hour, separated to remove the water layer, and obtained modified siloxane. With modified siloxane 20g, silane coupling agent vinyltrimethoxysilane 20g and emulsifier polyoxyethylene (23) lauryl alcohol 2g were stirred in 60g water for 2 hours, then, carried out emulsification in ultrasonic emulsifier, A milky white microemulsion water-based building waterproof material is prepared.

Embodiment 2

[0025] Example 2, 20 g of hydroxyl-containing siloxane, 10 g of p-alkylsulfonyl chloride with a carbon chain length of 8, and 1.4 g of pyridine are added to a three-hole flask with a stirrer, a thermometer and a reflux condenser. Raise the temperature to 56°C, react for 8 hours, cool down to room temperature, add 40g of water, stir for 1 hour, let stand for 1 hour, separate the water layer to obtain the modified siloxane. 20g of modified siloxane, 20g of silane coupling agent vinyltrimethoxysilane and 1.4g of emulsifier octanol polyoxyethylene (4) ether were stirred in 60g of water for 2 hours, and then emulsified in ultrasonic emulsifier , to prepare a milky white microemulsion water-based building waterproof material.

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PUM

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Abstract

The invention relates to a organosilicon waterproof emulsion for construction and a preparation method thereof, and is characterized in that 1 portion to 100 portions of siloxane which contains active group is modified by adding 1 portions to 40 portions of sulfonyl chloride with hydrophobic group under 0.1 portions to 10 portions of catalyst. The modified siloxane and 4 portions to 100 portions of silane coupling agent and emulsifier are emulsified in water to make a construction waterproof material of micro-emulsion water base with an average diameter less than 1nm and 10 percent to 80 percent of effective components; the construction waterproof material can dilute with water at any ratio and has two years stable period for room temperature storage. The organosilicon waterproof emulsion of the invention is applicable to mineral basement such as bricks, stones, concretes, and mortar which are all required to be shielded against water. The spraying or brushing can be used in the invention for waterproofing application of external and internal walls of buildings, roofs, floors, basements, etc. The emulsion of the invention has the advantages of low cost, no pollution, long service life, good waterproof performance without changing matrix color, being able to reduce water absorption and decrease spalling caused by freeze-thaw and weathering and prolonging basement service time. The invention has low cost, is environment-friendly and has remarkable social and economic benefit.

Description

technical field [0001] The invention relates to a silicone waterproof emulsion for building surfaces and a preparation method thereof. Background technique [0002] China's construction industry, which is accustomed to applying traditional waterproof coatings, is increasingly challenged by waterproof performance, as well as restrictions from the environmental and transportation sectors. Conventional waterproof materials are divided into the following categories (Journal of Chongqing Jiaotong University, 2006, 25(B06), 73-76): modified petroleum asphalt; polymer membranes; polyurethane or acrylic membranes; organic fluorine And organic silicones and polyurethane, acrylic resin emulsion, neoprene, styrene-butadiene rubber, nitrile rubber emulsion, etc. Polyurethane or acrylic membranes are restricted in use due to serious environmental pollution; modified petroleum asphalt has less and less market share due to serious pollution and poor weather resistance; polymer membranes h...

Claims

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Application Information

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IPC IPC(8): C09D183/00C09D5/02C09D5/16
Inventor 宁君于化平李晓辉王庆华梅向东
Owner 宁君
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