Environment-friendly waterproof sealant and preparation method thereof
A waterproof sealing and environment-friendly technology, which is applied in the direction of chemical instruments and methods, adhesives, adhesive types, etc., can solve the problems of not being resistant to water immersion, poor waterproofness of adhesives, and low bonding strength, and achieve waterproofness and adhesion Good results
Inactive Publication Date: 2012-07-25
CHENGDU XINJING SEALING MATERIAL TECH
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Problems solved by technology
[0005] The purpose of the present invention is to provide a polymer interpenetrating network (IPN) environment-friendly waterproof sealant produced by cold splicing of inorganic silicon and organic silicon polymers with polyacrylate emulsions, which fundamentally solves the problem of polyacrylic acid emulsion production. Adhesives have poor water resistance, are not resistant to water immersion, and have low bonding strength (especially for smooth surfaces such as glass). Energy conservation and environmental protection meet the national mandatory standards: "GB18583-2001 Interior Decoration Materials, Limits of Harmful Substances in Adhesives--- Requirements for Limit Values of Hazardous Substances in Water-based Adhesives
Method used
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Experimental program
Comparison scheme
Effect test
specific Embodiment approach
[0011] A kind of environment-friendly waterproof sealant described in the embodiment of the present invention is made into the finished product of silicone and inorganic silicon and polyacrylate interpenetrating network polymer, which includes the following components by weight: 90 parts of polyacrylate emulsion, polysiloxane 1.8 parts of alkane, 18 parts of sodium silicate (content 30% pH value 9-11), 0.6 parts of ammonia water (content 18%).
[0012] Preparation:
[0013] Put the sodium silicate into the mixing container, start the mixer at a speed of 1000 rpm, slowly add polysiloxane, and stop stirring after the gel is formed; put polyacrylate emulsion into the stirring tank of the vacuum pumping device, Slowly add the gel under high-speed (1000 rpm) stirring, mix well and continue stirring at a medium speed (800 rpm), and finally remove the air bubbles while stirring to form organic silicon and inorganic silicon. Acrylate interpenetrating network polymer.
[0014] test ...
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Abstract
The invention relates to an environment-friendly waterproof sealant and a preparation method thereof. The environment-friendly waterproof sealant is prepared by using the following components in parts by weight: 90 parts of polyacrylate emulsion, 0.2-5 parts of polysiloxane, 5-20 parts of inorganic silicon and 0.1-2 parts of ammonia water. The preparation method of the environment-friendly waterproof sealant comprises the following steps of: firstly putting the polyacrylate emulsion into a stirred vessel replacing a vacuum-pumping device, and adding a gel prepared from the inorganic silicon and the polysiloxane under the high speed stirring condition; continuously stirring and leading the gel to form an interpenetrating network polymer; and finally in order to reduce the cost and increase the economic applicability of the product, successively adding water, a conventional additive and a filler for uniformly stirring, and pumping out air bubbles to obtain the environment-friendly waterproof sealant. The environment-friendly waterproof sealant has the beneficial effects of being in line with the requirement of green environmental protection, overcoming the shortcomings of non-waterproofing and poor adhesive force of a water-based sealant and having the excellent quality of good water repellency, water soaking resistance, strong bonding capacity (including on the smooth surface of glass).
Description
technical field [0001] The invention relates to a waterproof sealant for construction and a preparation method thereof, in particular to a silicone-acrylic waterproof sealant made of organic silicon, inorganic silicon and polyacrylate polymer interpenetrating network and a preparation method thereof. Background technique [0002] With the needs of energy saving and environmental protection, countries all over the world have increased the research, development and application of environmentally friendly water-based adhesives. The adhesive produced by polyacrylic acid emulsion has a wide range of raw material sources and extremely low voc, so it has attracted widespread attention. However, due to the low cohesive strength, poor adhesion and poor water resistance of polyacrylic acid emulsion, its application has been affected. [0003] It has become a consensus in the industry to use organosilicon and polyacrylic acid emulsion interpenetrating network to improve the comprehensi...
Claims
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IPC IPC(8): C09J133/04C09J183/04C09J11/04C09K3/10
Inventor 金朝绪
Owner CHENGDU XINJING SEALING MATERIAL TECH