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Dealcoholization silicone weather-resistant sealant with low modulus and high displacement capability and preparation method of dealcoholization silicone weather-resistant sealant

A dealcohol-type, sealant technology, applied in the field of sealants, can solve environmental pollution, not enough environmental protection and other problems, and achieve the effect of convenient construction, long service life and wide application

Active Publication Date: 2018-06-19
GUANGZHOU BAIYUN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the small molecular substances released from the ketoxime type silicone sealant after curing are ketoxime compounds, which have certain environmental pollution and are not environmentally friendly.

Method used

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  • Dealcoholization silicone weather-resistant sealant with low modulus and high displacement capability and preparation method of dealcoholization silicone weather-resistant sealant
  • Dealcoholization silicone weather-resistant sealant with low modulus and high displacement capability and preparation method of dealcoholization silicone weather-resistant sealant
  • Dealcoholization silicone weather-resistant sealant with low modulus and high displacement capability and preparation method of dealcoholization silicone weather-resistant sealant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The dealcoholized silicone weather-resistant sealant with low modulus and high displacement capacity in this example is prepared by the following formula and method: Methyldimethoxy-terminated 107 glue (viscosity 50000cp, 25±0.1°C) 100 Parts, 20 parts of simethicone oil (viscosity of 100 cp, 25 ± 0.1 ° C), 25 parts of monohydroxy silicone oil (viscosity of 500 cp, 25 ± 0.1 ° C), 120 parts of nano-active calcium carbonate, added to the kneader, at temperature Dehydration and blending at 110°C and vacuum degree of 0.09MPa for 90 minutes, cooling to room temperature to obtain the base material; adding the above base material to a planetary mixer, and then adding 3 parts of dimethyldimethoxysilane, methyltriethyl 3 parts of oxysilane, 1.5 parts of γ-aminopropyltriethoxysilane, 0.25 parts of dibutyltin dilaurate, and carry out the chemical reaction for 90 minutes under the conditions of vacuum degree of 0.09MPa and rotation speed of 300rpm to obtain low-mode The dealcoholize...

Embodiment 2

[0041] The dealcoholized silicone weather-resistant sealant with low modulus and high displacement capacity in this example is prepared by the following formula and method: Methyldimethoxy-terminated 107 glue (viscosity 50000cp, 25±0.1°C) 100 Parts, 40 parts of simethicone oil (viscosity of 100cp, 25±0.1°C), 40 parts of monohydroxy silicone oil (viscosity of 500cp, 25±0.1°C), 200 parts of nano-active calcium carbonate, added to the kneader, at temperature Dehydration and blending for 90 minutes at 120°C and a vacuum of 0.09MPa, cooling to room temperature to obtain the base material; adding the above base material to a planetary mixer, adding 4.5 parts of dimethyldiethoxysilane, methyltrimethoxy 5.5 parts of base silane, 3 parts of γ-aminopropyltriethoxysilane, 0.5 part of dibutyltin dilaurate, and carry out the chemical reaction for 90 minutes under the condition of vacuum degree of 0.09MPa and rotation speed of 300rpm to obtain low modulus , Dealcoholized silicone weather-re...

Embodiment 3

[0043]The dealcoholized silicone weather-resistant sealant with low modulus and high displacement capacity in this example is prepared by the following formula and method: Methyldimethoxy-terminated 107 glue (viscosity 50000cp, 25±0.1°C) 100 Parts, 0 parts of dimethyl silicone oil (viscosity of 100cp, 25±0.1°C), 35 parts of monohydroxy silicone oil (viscosity of 500cp, 25±0.1°C), 80 parts of nano-active calcium carbonate, added to the kneader, at temperature Dehydration and blending at 130°C and vacuum degree of 0.09MPa for 90 minutes, cooling to room temperature to obtain the base material; adding the above base material to a planetary mixer, and then adding 1 part of dimethyldimethoxysilane, methyltrimethoxy 1 part of base silane, 0.5 part of γ-aminopropyltriethoxysilane, 0.05 part of dibutyltin dilaurate, and carry out chemical reaction for 90 minutes under the condition of vacuum degree of 0.09MPa and rotation speed of 300rpm, and the low modulus can be obtained , Dealcoho...

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Abstract

The invention relates to dealcoholization silicone weather-resistant sealant with low modulus and high displacement capability and a preparation method of dealcoholization silicone weather-resistant sealant. The silicone weather-resistant sealant is prepared from the following raw materials in parts by weight: 100 parts of methyldimethoxy-terminated 107 adhesive, 0 to 40 parts of dimethyl siliconeoil, 10 to 40 parts of monohydroxy silicone oil, 60 to 200 parts of inorganic filler, 2 to 10 parts of a compound cross-linking agent, 0.5 to 3 parts of a silane coupling agent, and 0.05 to 0.5 partof a catalyst; and the compound cross-linking agent is selected from at least two of methyltrimethoxysilane, methyl triethoxysilane, methyltri-n-propoxysilane, tetramethyl orthosilicate, tetraethoxysilane, isopropyl orthosilicate, dimethyl dimethoxy silicane, dimethyldiethoxysilane and dimethyl dipropylsilane. The silicone weather-resistant sealant has low modulus and high displacement capability,has small stress to a curtain wallboard, and has excellent weather resistance, good binding property and good water-resistant binding property.

Description

technical field [0001] The invention relates to the technical field of sealants, in particular to a dealcoholized weather-resistant sealant with low modulus and high displacement capacity and a preparation method thereof. Background technique [0002] Commonly known as silicone weather-resistant sealant refers to the silicone sealant used to seal the joints between building curtain wall panels. Silicone sealant has good UV resistance, displacement resistance, elastic recovery ability and excellent resistance to commonly used curtain wall materials. Excellent adhesion, becoming the preferred sealing material for building curtain walls. [0003] The difference between silicone weather-resistant sealant and ordinary silicone sealant is that it has higher elasticity after vulcanization, that is, the ability to resist high displacement, excellent adhesion and water-resistant adhesion, and excellent weather resistance. Compared with ordinary weather-resistant sealants, low-modulu...

Claims

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Application Information

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IPC IPC(8): C09J183/10C09J11/04C08G77/452C08G77/26C08G77/08
CPCC08G77/08C08G77/26C08G77/452C08K2003/265C08K2201/011C09J11/04C09J183/10
Inventor 陈文浩李向楠蒋金博曾容
Owner GUANGZHOU BAIYUN CHEM IND
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