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A kind of two-component terminal silyl group polyether modified sealant and its preparation method

A silyl-terminated polyether and sealant technology, which is applied in the field of sealants, can solve the problems of poor storage stability of sealants, weak shear strength of substrates, and slow curing in deep layers, and achieve short positioning time, fast curing, and long shelf life Effect

Active Publication Date: 2020-10-16
HANGZHOU ZHIJIANG NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the more commonly used silyl-terminated polyether modified sealant is a one-component silyl-terminated sealant. Since the curing method of this sealant is moisture curing, the surface cured layer prevents water vapor from penetrating into the interior, resulting in slow curing in the deep layer. It takes 7d or more to reach the final strength. For this reason, CN105219337B discloses a two-component silane-modified polyether sealing material and its preparation method. The catalyst and the polymer are placed in the two components A and B respectively, and they are stirred and mixed at room temperature , due to the presence of moisture in the components, the inside and outside are cured at the same time after mixing, and the curing speed is significantly improved; but the storage stability of the sealant obtained by this method is poor, and the shear strength to the substrate is still weak

Method used

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  • A kind of two-component terminal silyl group polyether modified sealant and its preparation method
  • A kind of two-component terminal silyl group polyether modified sealant and its preparation method
  • A kind of two-component terminal silyl group polyether modified sealant and its preparation method

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preparation example Construction

[0043] The present invention also provides a preparation method of a two-component silyl-terminated polyether modified sealant, comprising:

[0044] Component A is obtained by mixing 30-50 parts by weight of a silyl-terminated polyether-modified polymer, 15-25 parts by weight of a plasticizer A, 40-50 parts by weight of a filler A, and 4-10 parts by weight of an auxiliary material A;

[0045] 40-60 parts by weight of filler B, 10-25 parts by weight of plasticizer B, 0.5-2 parts by weight of stabilizer, 5-15 parts by weight of terminal silane-based polyurethane resin, 5-15 parts by weight of water-removing agent, 10-20 parts by weight The adhesion promoter and 3-15 weight parts of the catalyst are mixed and stirred to obtain the component B.

[0046] According to the present invention, the present invention mixes and stirs 30-50 parts by weight of terminal silane-based polyether modified polymer, 15-25 parts by weight of plasticizer A, 40-50 parts by weight of filler A, and 4-1...

Embodiment 1

[0051] Component A: 40 parts of silyl-terminated polyether modified polymer 1 (25 parts of S303H of Zhongyuan Chemical, 15 parts of SAT720), 20 parts of plasticizer DIDP, 45 parts of filler A (light 40 parts of high quality calcium carbonate, 5 parts of heavy calcium carbonate), 2.5 parts of reinforcing filler (hydrophilic fumed silica), 2 parts of colored filler (carbon black), 1.5 parts of ultraviolet light absorber (BASF's 329) added Put it into a double-planetary stirred tank, stir for 1 hour under the conditions of a vacuum greater than 0.09MPa and a stirring speed greater than 25rpm / min, control the water content within the range of 1000-2000ppm, and put the material into a 300ml A tube to prepare the A component.

[0052] Component B: Add 50 parts of filler B (40 parts of 0.6μm light calcium carbonate, 10 parts of heavy calcium carbonate), 15 parts of plasticizer DIDP, and 1 part of heat stabilizer (BASF 1010) into the double planetary stirring tank , dehydration for 2 ...

Embodiment 2

[0055] Component A: 40 parts of terminal silyl polyether modified polymer 1 (40 parts of SAX400 of Zhongyuan Chemical), 20 parts of plasticizer DIDP, 45 parts of filler A (light calcium carbonate 40 parts of 0.6 μm particle size Parts, 5 parts of heavy calcium carbonate), 2.5 parts of reinforcing filler (hydrophilic fumed silica), 2 parts of colored filler (carbon black), 1.5 parts of ultraviolet light absorber (BASF's 329) are added to the double planetary stirring In the kettle, stir for 1 hour under the conditions of a vacuum degree greater than 0.09MPa and a stirring speed greater than 25rpm / min, control the water content within the range of 1000-2000ppm, and put the material into a 300ml A tube to prepare the A component

[0056] Component B: Add 50 parts of filler B (40 parts of 0.6μm light calcium carbonate, 10 parts of heavy calcium carbonate), 15 parts of plasticizer DIDP, and 1 part of heat stabilizer (BASF 1010) into the double planetary stirring tank , dehydration ...

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Abstract

The invention provides a two-component silane-terminated polyether modified sealant and a preparation method thereof. The modified sealant provided by the invention is composed of a component A and acomponent B, wherein the component A comprises 30-50 parts by weight of a silane-terminated polyether modified polymer, 15-25 parts by weight of a plasticizer A, 40-50 parts by weight of a filler A and 4-10 parts by weight of an auxiliary material A; and the component B comprises 40-60 parts by weight of a filler B, 10-25 parts by weight of a plasticizer B, 0.5-2 parts by weight of a stabilizer, 5-15 parts by weight of silane-terminated polyurethane resin, 5-15 parts by weight of a water removal agent, 10-20 parts by weight of an adhesion promoter and 3-15 parts by weight of a catalyst. The silane-terminated polyether modified sealant can be quickly cured, and is short in positioning time and high in bonding strength; the bonding strength of the sealant to metal can be greater than 2.0 MPa; and the storage time of the sealant can reach 12 months, so the shelf life of the sealant is long.

Description

technical field [0001] The invention relates to the field of sealants, in particular to a two-component terminal silyl group polyether modified sealant and a preparation method thereof. Background technique [0002] At present, the sealants used in the construction and industrial markets are mainly silicone and polyurethane. Silicone sealant has excellent aging resistance, but its anti-pollution property is poor, and its bonding strength to the base material is low; although polyurethane sealant has high strength, it contains free isocyanate, which is easy to form bubbles during curing and has poor aging resistance. And often need to be used in conjunction with primer. The silicone-terminated polyether-modified sealant was first developed by Kaneka Company in Japan. It combines the properties of silicone and polyurethane sealants, and has a wide range of adhesion to substrates, environmental friendliness, high resistance to deformation and displacement, and low Pollution a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J171/00C09J175/04C09J11/04C09J11/06C09K3/10
CPCC08K2003/265C08K2201/014C09J11/04C09J11/06C09J171/00C09K3/10C08L75/04C08K13/02C08K5/12C08K3/36C08K3/26C08K5/134
Inventor 刘伟明陈丹刘壮壮陶小乐何永富
Owner HANGZHOU ZHIJIANG NEW MATERIAL CO LTD
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