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A kind of silyl-terminated polyether-polyacrylate type sealant and preparation method thereof

A technology of silane-terminated polyether and polyacrylate, applied in the field of sealant, can solve the problems of low bonding strength, large performance attenuation and poor water resistance of various substrates

Active Publication Date: 2021-03-02
HANGZHOU ZHIJIANG NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main chain of the traditional silyl-terminated polyether modified sealant is a -C-O-C-ether bond structure, which determines that the water resistance of this type of sealant is poor, and the performance decays greatly after high temperature resistance, and the bonding strength to various substrates not tall

Method used

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  • A kind of silyl-terminated polyether-polyacrylate type sealant and preparation method thereof
  • A kind of silyl-terminated polyether-polyacrylate type sealant and preparation method thereof

Examples

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preparation example Construction

[0042] The present invention provides a method for preparing a silyl-terminated polyether-polyacrylate type sealant described in the above technical solution, comprising the following steps:

[0043] Mix silyl-terminated polyether-polyacrylate, extending filler, reinforcing filler, colored filler, heat stabilizer, and UV absorber, stir for 25-35 minutes, and heat up to 100-110°C after the appearance of no particles. Continue stirring for 110-130 minutes under the conditions of vacuum degree greater than 0.09MPa and stirring speed greater than 25rpm, then cool down to below 40°C, add water remover and adhesion promoter, maintain vacuum degree and continue stirring for 15-25 minutes, open the kettle and add organic tin catalyst, and continue to stir for 8-12 minutes to obtain a silane-terminated polyether-polyacrylate type sealant.

[0044] The present invention adopts GB / T13477.5-2002 to test the dry time of the sealant; the present invention adopts GB / T7124-2008 to test the sh...

Embodiment 1

[0049] 52 parts of silyl-terminated polyether-polyacrylate prepared in the preliminary examples, 35 parts of light calcium carbonate with a particle size of 0.6 μm, 1.5 parts of hydrophobic fumed silica, and 2 parts of carbon with an oil absorption value greater than 100ml / 100g Black, 1 part of ultraviolet light absorber BASF's UV329, 1 part of heat stabilizer commercially available grade 1010, add to the double planetary stirring tank, stir for 30min, heat up to 100-110°C, when the vacuum degree is greater than 0.09MPa and the stirring speed is greater than After stirring for 2 hours at 25rpm, pass cooling water to cool down to below 40°C, add 3 parts of vinyltrimethoxysilane coupling agent, 3 parts of bisaminoalkoxysilane, maintain vacuum and continue stirring for 20 minutes, open the kettle and add 1 part organotin catalyst, continue to stir for 10 minutes, and discharge to obtain a silyl-terminated polyether-polyacrylate sealant.

Embodiment 2

[0051] 52 parts of silyl-terminated polyether-polyacrylate prepared in the preliminary examples, 35 parts of light calcium carbonate with a particle size of 0.6 μm, 1.5 parts of hydrophobic fumed silica, 2 parts of titanium dioxide, and 1 part of ultraviolet light absorbing BASF's UV326, 1 part of heat stabilizer commercially available grade 245, added to the double planetary stirred tank, stirred for 30 minutes, heated to 100-110 °C, and stirred for 2 hours under the conditions of vacuum degree greater than 0.09MPa and stirring speed greater than 25rpm , cool down to below 40°C with cooling water, add 3 parts of vinyltrimethoxysilane coupling agent, 3 parts of bisaminoalkoxysilane, maintain vacuum and continue stirring for 20 minutes, open the kettle and add 1 part of organotin catalyst, continue After stirring for 10 minutes, the material was discharged to obtain a silyl-terminated polyether-polyacrylate type sealant.

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Abstract

The invention provides a silane-terminated polyether-polyacrylate sealant and a preparation method thereof. The sealant comprises, by weight, 40-60 parts of a silane-terminated polyether-polyacrylatepolymer, 30-45 parts of an incremental filler, 1-5 parts of a reinforcing filler, 1-3 parts of a coloring filler, 1-2 parts of an ultraviolet absorber, 1-2 parts of a heat stabilizer, 1-5 parts of a water removal agent, 2-5 parts of an adhesion promoter and 0.5-2 parts of an organic tin catalyst; and the silane-terminated polyether-polyacrylate is prepared by the following steps: reacting methyl methacrylate, styrene, isobornyl methacrylate, allyl polyether and an initiator, then adding a functional monomer vinyltrimethoxysilane, and continuing to react. The sealant is a modified sealant withhigh bonding strength for metal and a plastic substrate. The sealant also has good heat-resistant stability and water resistance, the bonding strength attenuation is relatively small after the sealantis soaked in water, and the service life at 120 DEG C is long.

Description

technical field [0001] The invention belongs to the technical field of sealants, in particular to a silyl-terminated polyether-polyacrylate type sealant and a preparation method thereof. Background technique [0002] Silicone-terminated polyether-modified sealants: 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 Corporation of Japan. It combines the properties of silicone and polyurethane sealant, and has extensive adhesion to substrates, environmental friendliness, high resistance to def...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J151/00C09J11/04C09J11/06C08F283/06C08F220/14C08F212/08C08F220/18C08F230/08C08F285/00
CPCC08F283/065C08F285/00C08K2003/2241C08K2003/265C09J11/04C09J11/06C09J151/00C08F220/14C08F212/08C08F230/08C08K13/02C08K3/26C08K3/36C08K3/04C08K5/5425C08K5/544C08K5/3475C08K3/22
Inventor 刘壮壮刘伟明陈丹何永富陶小乐
Owner HANGZHOU ZHIJIANG NEW MATERIAL CO LTD