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Two-component structural silicone sealant for building
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A two-component, sealant technology, applied in adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems of not being able to bear large loads for a long time, short service life, etc., to achieve extended service life, Excellent anti-attenuation, excellent anti-aging and excellent effect
Inactive Publication Date: 2010-10-20
ZHENGZHOU ZHONGYUAN SILANDE HIGH TECH CO LTD
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[0003] The technical problem to be solved by the present invention is that it cannot bear a large load for a long time and has a short service life. It provides a silicone structural sealant for construction that has a long service life and can meet the structural assembly requirements of specific curtain walls.
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[0030] A two-component silicone structural sealant for construction, its components are as follows:
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Abstract
The invention discloses a two-component structural siliconesealant for building, which comprises the following components by weight part: a component A: 80 to 120 parts of hydroxy-terminated polydimethylsiloxane, 10 to 80 parts of alkyl-terminated poly dimethylsiloxane, 100-300 parts of active filler; and a component B: 5 to 15 parts of alkoxy silane, 0.3-5 parts of coupling agent, 0.01-0.2 part of catalyst, and 0.01-5 parts of light stabilizer. The invention takes hydroxyl-terminated poly dimethyl siloxane as a base adhesive, and adjusts the ratio of ingredients by adding the crosslinking agent alkoxy silane and the coupling agent to obtain the structural siliconesealant with excellent anti-aging and anti-decay performances, and the ratio of the tensile bond strength of water-ultraviolet 1008h and the like and the standard-condition tensile bond strength is equal to or greater than 0.75; the standard-condition tensile bond strength reaches 0.8-3.0MPa, and the elongation rate exceeds 100%; and the service life is prolonged to 25 years, and the requirements of the structural assembly of specific curtain walls can be met.
Description
technical field [0001] The invention relates to a silicone structural sealant, in particular to a two-component silicone structural sealant for construction. Background technique [0002] As my country's building curtain walls are built higher and higher, the structure is more and more complex, the load they bear is also increasing, and the forms are more diverse, so the requirements for structural sealants are also getting higher and higher. Because the silicone structural sealant is bonded to the building reinforcement, it can not only make the components reach or exceed the original design level, improve the strength, stability and integrity, but also prolong the service life, safe and reliable, and the construction is simple and time-saving, without damage The original structure, after strengthening, has a beautiful appearance, is leak-proof and anti-corrosion, so it has attracted attention from all sides. In 1997, the country formulated the standard GB 16776 "Silicon S...
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