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One-component silane-modified polyether sealant composition, sealant and preparation method thereof

A silane-modified polyether and composition technology, applied in the direction of polyether adhesives, adhesives, adhesive types, etc., can solve the problems of weather resistance not as good as silicone, pulverized surface, poor recovery rate, etc., to prevent Decomposition or cross-linking, particle prevention, high recovery effect

Active Publication Date: 2021-03-23
浙江中天东方氟硅材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to improve the storage performance of the glue, it is unavoidable to add a water remover during the preparation of the glue, but the conventional water remover such as A171, A151, isocyanate silane coupling agent and oxazolidine coupling agent are added to the system often have a certain smell
In addition, although silane-modified polyether sealant has some properties of silicone sealant, it is not as good as silicone in terms of weather resistance, and it will appear pulverization and surface cracks when used outdoors for a long time
Finally, the problem of poor recovery rate after curing of low modulus one-component silane-modified polyether sealants is common.

Method used

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  • One-component silane-modified polyether sealant composition, sealant and preparation method thereof

Examples

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preparation example Construction

[0041] The present invention also provides a method for preparing a one-component silane-modified polyether sealant, wherein the method includes the step of mixing the components of the one-component silane-modified polyether sealant of the present invention.

[0042] According to the invention, preferably, said mixing is carried out by,

[0043] 1) 30-60% by weight of silane-modified polyether resin and 30-60% by weight of alkoxy-terminated polydimethylsiloxane are first mixed to obtain a first blend, and the first performing a second mixing of the blend with plasticizer, reinforcing filler, UV absorber, light stabilizer and optionally pigment to obtain a mixed material;

[0044] 2) Disperse the mixed material under the conditions of vacuum degree of 0.085-0.095Mpa and temperature of 110-130°C, and when the water content is less than 500ppm, lower the temperature to 20-50°C to obtain a dry mixed material;

[0045] 3) The remaining silane-modified polyether resin and the rema...

Embodiment 1

[0055] This example is used to illustrate the preparation of the high-performance low-modulus one-component silane-modified polyether sealant (hereinafter referred to as sealant) of the present invention

[0056] Stir 50% by weight of silane-modified polyether resin and 50% by weight of alkoxy-terminated polydimethylsiloxane at 25°C for 15 minutes to mix them uniformly to obtain 50% by weight of silane-modified polydimethylsiloxane. A blend of ether resin and 50% by weight of alkoxy-terminated polydimethylsiloxane; add the blend, plasticizer, nano-calcium carbonate, ultraviolet The absorbent and the light stabilizer were stirred for 15 minutes to make it evenly mixed to obtain a mixed material; the mixed material was evacuated at 105°C to a vacuum degree of 0.095Mpa, and dispersed at a high speed of 1000rpm for 3 hours ( The water content is reduced to less than 500ppm), and the temperature is lowered to 50°C to obtain a dry mixed material; then the other half of the blend of ...

Embodiment 2

[0062] This example is used to illustrate the preparation of the high-performance low-modulus one-component silane-modified polyether sealant of the present invention

[0063] Stir 50% by weight of silane-modified polyether resin and 50% by weight of alkoxy-terminated polydimethylsiloxane at 25°C for 15 minutes to mix them uniformly to obtain 50% by weight of silane-modified polydimethylsiloxane. A blend of ether resin and 50% by weight of alkoxy-terminated polydimethylsiloxane; add the blend, plasticizer, nano-calcium carbonate, ultraviolet The absorbent and the light stabilizer were stirred for 15 minutes to make it evenly mixed to obtain a mixed material; the mixed material was evacuated at 105°C to a vacuum degree of 0.095Mpa, and dispersed at a high speed of 1000rpm for 3 hours ( The water content is reduced to less than 500ppm), and the temperature is lowered to 50°C to obtain a dry mixed material; then the other half of the blend of silane-modified polyether resin and a...

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Abstract

The invention relates to the field of high molecular sealing materials and discloses a single-component silane modified polyether sealant composition and a sealant prepared from the single-component silane modified polyether sealant composition. The single-component silane modified polyether sealant composition disclosed by the invention is prepared from silane modified polyether resin, alkoxy terminated polydimethylsiloxane, a plasticizing agent, reinforcing filler, a water removal agent, a light stabilizing agent, an ultraviolet absorbent, a coupling agent and a catalyst. The sealant disclosed by the invention has the advantages of good smell, good ageing resistance, high recovery rate and the like.

Description

technical field [0001] The invention relates to the field of polymer sealing materials, in particular to a one-component silane-modified polyether sealant composition and a sealant prepared from the one-component silane-modified polyether sealant composition. Background technique [0002] Since the Ministry of Housing and Urban-Rural Development launched the "Industrialized Building Evaluation Standards" in 2015 and decided to fully promote prefabricated buildings nationwide in 2016, the prefabricated construction industry has achieved considerable development. Whether it is the State Council or the local government, they are escorting the development of prefabricated buildings, and have put forward some rigid indicators for the proportion of prefabricated buildings in new real estate projects. At present, more than 30 cities across the country have been identified as prefabricated building demonstration cities, and a large number of prefabricated construction industry bases...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J171/00C09J183/04C09J11/04C09J11/06
CPCC08K2003/265C08K2201/011C09J11/04C09J11/06C09J171/00C08L83/04C08K13/02C08K3/26C08K5/12
Inventor 朱雪锋杨庆红张洪涛林茜田春刘朝辉王鑫鑫陈荣雄
Owner 浙江中天东方氟硅材料股份有限公司
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