Silane modified polyether sealant and preparation method thereof

A silane-modified polyether and sealant technology, which is applied in the direction of polyether adhesives, adhesives, carboxyl rubber adhesives, etc., can solve the problems of large proportion of resin, high cost, and difficulty in ensuring long-term performance

Inactive Publication Date: 2020-05-05
HUNAN KOSEN NEW MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult for the existing MS sealant to ensure good fluidity, elastic recovery rate and other indicators under high filler content. The filler content is usually controlled in the range of 40-45%, the proportion of resin is large, the cost is high, and it is difficult to guarantee long-term performance

Method used

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  • Silane modified polyether sealant and preparation method thereof
  • Silane modified polyether sealant and preparation method thereof
  • Silane modified polyether sealant and preparation method thereof

Examples

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preparation example Construction

[0026] The preparation steps of described hyperbranched fluorine-containing polyester are as follows:

[0027] Add hyperbranched carboxyl polyester and 2-perfluorooctyl ethanol to the reaction kettle so that the number of moles of carboxyl groups is twice the number of moles of hydroxyl groups, add p-toluenesulfonic acid dropwise under a nitrogen atmosphere, and reflux at 105°C until the acid value of the system is basically Stable, obtain hyperbranched fluorine-containing polyester, viscosity at 25°C <4000mPa.s.

[0028] The sealant formula of embodiments 1 to 4 is shown in Table 1, and the sealant is prepared in the following way:

[0029] (1) Take each component by weight, add hyperbranched fluorine-containing polyester, MS resin, ultrafine fully vulcanized carboxylated styrene-butadiene rubber, plasticizer, and antioxidant into a stainless steel mixing device with a planetary mixer. It has the functions of stirring, temperature adjustment, vacuuming, feeding and dischargi...

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Abstract

The invention discloses a silane modified polyether sealant and a preparation method thereof. The silane modified polyether sealant comprises the following components (by weight): 12-20% of MS resin,1-4% of hyperbranched fluorine-containing polyester, 1-3% of superfine full-vulcanized carboxylic butadiene styrene rubber, 60-70% of a filler, 2-5% of a thixotropic agent, 1-3% of a dehydrating agent, 0.03-0.08% of a catalyst, 9-20% of a plasticizer, 0.10-0.40% of an ultraviolet light absorber, 0-3% of a coloring agent, 0.5-1.0% of a coupling agent, 0.04-0.1% of an antioxidant and 0.4-1.0% of a flame retardant. By matching the above components, the content of the filler is increased, and good comprehensive properties such as flowability, aging resistance and stain resistance are guaranteed.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a silane-modified polyether sealant and a preparation method thereof. Background technique [0002] Silane-modified polyether resin, also known as MS resin, is an alkoxysilane-terminated polyether resin. Under the action of a catalyst and water, it will undergo hydrolysis, cross-linking and curing to form a macromolecular elastomer. Molecular elastomer has low modulus, high elastic recovery rate, good adhesion, good water resistance and aging resistance, and can be used as a mixture with plasticizers, fillers, colorants, catalysts, anti-aging agents, and flame retardants. It can be used to seal the gaps between the inner and outer walls of traditional buildings, or the sealing of vehicles, mechanical equipment, doors and windows, glass curtain walls, etc., which is called MS sealant in the industry. It is difficult for the existing MS sealant to ensure good fluidity, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J171/00C09J167/00C09J113/00C09J11/04C09J11/06C09J11/08
CPCC08K2003/026C08K2201/014C08L2201/08C08L2205/025C08L2205/03C08L2205/035C09J11/04C09J11/06C09J11/08C09J171/00C08L67/00C08L13/00C08K13/06C08K5/12C08K3/36C08K3/34C08K7/26C08K9/10C08K3/02
Inventor 郑保昌王理尧钟雪琴欧阳光华石亮
Owner HUNAN KOSEN NEW MATERIAL
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