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Low-modulus elastic sealant and preparation method thereof

An elastic sealing, low modulus technology, used in adhesives, adhesive types, polyether adhesives, etc., to solve problems such as poor overall performance

Active Publication Date: 2019-01-04
贵阳银镒新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silane-modified sealants have been greatly developed recently, but the overall performance of existing silane-modified sealants is poor

Method used

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  • Low-modulus elastic sealant and preparation method thereof

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preparation example Construction

[0023] Some embodiments of the present invention also provide a preparation method of the above-mentioned low modulus elastic sealant, which includes:

[0024] S1. Stir the plasticizer, calcium carbonate and activated calcium carbonate and remove moisture and air bubbles in a vacuum to obtain the first product.

[0025] Specifically, the plasticizer, calcium carbonate and activated calcium carbonate are stirred at a rotating speed of 950 to 1150rpm, and the above-mentioned raw materials can be fully mixed evenly through high-speed stirring, and the air bubbles between the raw materials are also easily removed. The process of stirring and vacuum removing moisture and air bubbles is carried out at a temperature of 85-95°C. At this temperature, moisture and air bubbles can easily escape from the raw materials and be effectively removed, which is beneficial to the subsequent reaction. Reaction effect. Wherein, the degree of vacuum for vacuum removal is 0.05-0.08Mpa.

[0026] S2....

Embodiment 1

[0032] The low modulus elastic sealant of the present embodiment, in parts by weight, its raw materials include: 20 parts of German Wacker E35.xm25, 10 parts of butyl benzyl phthalate, 20 parts of calcium carbonate, 20 parts of activated calcium carbonate , 1 part of fumed silica, 1 part of silane coupling agent a171, 0.5 part of silane coupling agent kh550, 0.5 part of light stabilizer Tinuvin 765, 0.5 part of antioxidant and 0.2 part of catalyst TBTDL.

[0033] The preparation method of this low modulus elastic sealant is:

[0034] First, the plasticizer, calcium carbonate and activated calcium carbonate were stirred and mixed at a rotational speed of 950 rpm, and moisture and air bubbles were removed in a vacuum at a temperature of 85° C. at a vacuum degree of 0.05 MPa.

[0035] Next, at a temperature of 60° C., continue to maintain the rotation speed, add fumed silica, silane-modified polyether, and a water-removing agent for mixing, and react for 25 minutes.

[0036] The...

Embodiment 2

[0038] The low-modulus elastic sealant of the present embodiment, in parts by weight, its raw materials include: 25 parts of German Wacker E35.xm25, 20 parts of butyl benzyl phthalate, 30 parts of calcium carbonate, 40 parts of activated calcium carbonate , 5 parts of fumed silica, 2 parts of silane coupling agent a171, 1 part of silane coupling agent kh550, 1.5 parts of light stabilizer Tinuvin 765, 1.5 parts of antioxidant and 0.3 parts of catalyst TBTDL.

[0039] The preparation method of this low modulus elastic sealant is:

[0040] First, the plasticizer, calcium carbonate and activated calcium carbonate were stirred and mixed at a rotation speed of 1150 rpm, and moisture and air bubbles were removed in a vacuum at a temperature of 95° C. at a vacuum degree of 0.08 MPa.

[0041] Secondly, at a temperature of 90° C., while continuing to maintain the rotational speed, add fumed silica, silane-modified polyether, and a water-removing agent for mixing, and react for 35 minutes....

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Abstract

The invention discloses low-modulus elastic sealant and a preparation method thereof. The low-modulus elastic sealant is made from, by weight, 20-25 parts of trimethoxysilylpropylaminocarbamate-terminated polyether, 10-20 parts of a plasticizer, 20-30 parts of calcium carbonate, 20-40 parts of active calcium carbonate, 1-5 parts of fumed silica, 1-2 parts of silane coupling agent a171, 0.5-1 partof silane coupling agent kh550, 0.5-1.5 parts of a photostabilizer, 0.5-1.5 parts of an antioxidant, and 0.2-0.3 part of a catalyst. The preparation method includes: stirring the plasticizer, calciumcarbonate and active calcium carbonate, removing water and foam in vacuum, mixing with fumed silica, silane-modified polyether and a water remover, and allowing reacting; mixing with a catalyst, an adhesion enhancer and an antioxidant at the temperature of less than 40 DEG C, allowing reacting, and defoaming in vacuum so as to obtain the sealant having excellent overall performance.

Description

technical field [0001] The invention relates to the technical field of chemical materials, in particular to a low-modulus elastic sealant and a preparation method thereof. Background technique [0002] Sealants are usually used for caulking and connection sealing of constructions, roads, bridges, airstrips, etc., which have expansion joints. In the field of construction, it is especially required that the sealant has the characteristics of low modulus and high elastic recovery rate, which can effectively absorb and compensate dynamic load, transmit force evenly, and prevent the occurrence of bond failure during long-term dynamic displacement and deformation. Modern society has increasingly stringent requirements for environmental sanitation and safety, and the rapid development of large-scale, diversified, high-rise and long-lived buildings has put forward higher requirements for the performance of building sealants. Silane-modified sealants have been greatly developed rece...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J171/00C09J11/04C09J11/06C08G65/336C08G65/48
CPCC08G65/336C08G65/48C08K2003/265C08K2201/014C09J11/04C09J11/06C09J171/00C08K13/02C08K5/12C08K3/26C08K3/36
Inventor 舒凯
Owner 贵阳银镒新材料科技有限公司
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