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A kind of high-strength silane-modified polyether sealant and preparation method thereof

A technology of silane-modified polyether and sealant, which is applied in the field of sealant and can solve problems such as high cost and complicated operation process

Active Publication Date: 2021-05-11
SHANGHAI DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The fillers used in most of the existing silane-modified polyether sealants are heavy calcium carbonate calcium, nano-calcium carbonate, and gas silicon, and the cost is relatively high, especially represented by nano-calcium carbonate, and the operation process is relatively complicated.

Method used

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  • A kind of high-strength silane-modified polyether sealant and preparation method thereof
  • A kind of high-strength silane-modified polyether sealant and preparation method thereof
  • A kind of high-strength silane-modified polyether sealant and preparation method thereof

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preparation example Construction

[0049] In a specific embodiment, the application provides a method for preparing a high-strength one-component silane-modified polyether sealant, which includes the following steps: silane-modified polyether resin, ground calcium carbonate, kaolin (Souli International Trading Co., Ltd. 291, Vm), plasticizer and dewatering agent, stir evenly, vacuumize and defoam; after cooling down to 50°C, add coupling agent and catalyst and stir evenly; finally negative pressure defoam The glue is produced to obtain a high-strength one-component silane-modified polyether sealant; the plasticizer is DINP (diisononyl phthalate).

[0050] In a specific embodiment, the silane-modified polyether resin can be a conventional resin in this field, and the preferred performance parameter is viscosity: 8000mpa.s-10000mpa.s (cone and plate viscometer, 25°C), without Silane-modified polyether resin of NCO. The amount of said silane-modified polyether resin can be the conventional amount of this type of ...

Embodiment

[0071] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. All reagents and raw materials used were purchased commercially unless otherwise specified. For the experimental methods that do not specify specific conditions in the following examples, select according to conventional methods and conditions, or according to the product instructions.

[0072] In the following examples, the preparation method of silane-modified polyether sealant is as follows:

[0073] (1) Prepare materials: prepare materials according to the mass percentage of silane-modified polyether sealant;

[0074] (2) Use a double planetary mixer for mixed production: put heavy calcium carbonate, kaolin, fumed silicon, silane-modified polyether resin, plasticizer and water remover into the stirring pot, stir until uniformly dispersed, and no particles;

[0075] (4) heat up to 100-150°C, vacuumize and keep...

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Abstract

The application relates to a high-strength silane-modified polyether sealant. The present application also relates to a method for preparing high-strength silane-modified polyether sealant, which includes mixing silane-modified polyether resin, heavy calcium carbonate, kaolin, fumed silica, plasticizer and water remover to obtain the first Mixture; at a temperature of 100-150°C, the first mixture is stirred and mixed and then subjected to negative pressure defoaming treatment to obtain a second mixture; the temperature is lowered to below 50°C, and a coupling agent is added to the first mixture and catalyst, after stirring evenly, further degassing and gelling under negative pressure to obtain the high-strength silane-modified polyether sealant. The application also provides the application of a high-strength silane-modified polyether sealant on building joints or in door and window sealing joints.

Description

technical field [0001] The application relates to the technical field of sealants, in particular to a high-strength silane-modified polyether sealant and a preparation method thereof. Background technique [0002] The curing mechanism of silane-modified polyether sealant is that after the modified silane glue (MS) is in contact with water in the air, it is first hydrolyzed into silanol groups (Si—OH); Condensation to precipitate water, or Si—OH and Si—OCH 3 Methanol is condensed and precipitated to form Si—O—Si bonds; finally crosslinked into a body-shaped structure elastomer with Si—O—Si bonds as network crosslinking points, and flexible polyether chains between crosslinking points to achieve adhesion and sealing effect. The main chain of silane-modified polyether sealant is polyether structure similar to polyurethane glue, and the end group is silyl group similar to silicone glue, so it combines the advantages of both in performance, such as: excellent weather resistance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J171/00C09J11/04C09J11/06
CPCC08K2003/265C08K2201/011C09J11/04C09J11/06C09J171/00C08K13/02C08K3/26C08K3/346C08K3/36C08K5/5425C08K5/544C08K5/12
Inventor 王振波谢琼春李欣怡黄斌
Owner SHANGHAI DONGDA CHEM
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