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Mildew-proof dealcoholization type organic silicon sealant and preparation method thereof

A dealcohol-type, silicone-based technology, which is applied in chemical instruments and methods, adhesives, and other chemical processes, can solve the problems of large equipment damage, yellowing and yellowing of thiazole preservatives, and achieve good mechanical properties. Yellowing phenomenon, undemanding effects

Inactive Publication Date: 2016-04-20
西卡(江苏)工业材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, dealcohol-type silicone sealants generally have a disadvantage, such as black spots and yellowing, which are prone to appear after curing for a period of time. Dealcohol-type silicone sealants are disclosed in published patent documents, such as patent application number 201010574200.X. A mildew-resistant silicone sealant is developed, which is based on 107 glue with titanium catalyst and thiazole preservatives, but thiazole preservatives are easy to cause yellowing
For example, a "moisture-resistant, storage-stable dealcoholized silicone sealant" recommended by patent application number CN101768420B, due to the direct use of α, ω-dihydroxypolydimethylsiloxane as a polymer, the production process There is a viscosity peak, the production process is complicated, and the damage to the equipment is greater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A. Put 100 parts of double-terminated hydroxyl polydimethylsiloxane and 5 parts of methyltrimethoxysilane weighed in parts by weight and have a viscosity of 5000CP into the reactor, and react at 80°C under stirring 120min, after the reaction is completed, the temperature is raised to 140°C and vacuumized to -0.1MPa, and the vacuum stirring time is 60min to extract the unreacted cross-linking agent, that is, to remove the unreacted methyltrimethoxysilane. Cool to room temperature under the protection of nitrogen to obtain 107 blocked silicone oil.

[0017] B. Prepare the finished product, mix the 107 end-capped silicone oils obtained by step A with 10 parts of calcium carbonate with a particle size of 5000 mesh and water content, that is, a water content less than 0.1% in parts by weight, and then carry out vacuum stirring, that is, Stir under vacuum, the vacuum degree of vacuuming is -0.1MPa, stir for 20min, then add 0.5 part of anthranilic acid arsenic acid and dibutyl...

Embodiment 2

[0019] A. Put 100 parts of double-terminated hydroxyl polydimethylsiloxane and 7 parts of methyltrimethoxysilane weighed in parts by weight and have a viscosity of 5000CP into the reactor, and react at 75°C under stirring React at high temperature for 130min. After the reaction, raise the temperature to 135°C and vacuum the air until the vacuum degree is lower than -0.1MPa. Trimethoxysilane was vacuumized and cooled to room temperature under the protection of nitrogen to obtain 107 blocked silicone oil.

[0020] B. Prepare the finished product, mix the 107 end-capped silicone oils obtained by step A with 100 parts of calcium carbonate with a particle size of 3000 mesh and water content, that is, a water content less than 0.1% in parts by weight, and then carry out vacuum stirring, that is, Stir in a vacuum state, the positive space of the vacuum is -0.1MPa, stir for 18min, then add 0.3 parts of aminobenzene arsenic acid and dibutyl dibutyl arsenic acid obtained by weight parts...

Embodiment 3

[0022] Change the viscosity of the double-terminated hydroxyl polydimethylsiloxane in step A to 2000CP, change the crosslinking agent to 5.5 parts by weight of vinyltrimethoxysilane, and change the reaction temperature and time to 85 ℃ and 110min, change the heating temperature after the reaction to 145 ℃, and change the vacuuming time to 55min; change the reinforcing filler in step B to silicon dioxide synthesized by gas phase method and with a moisture content less than 0.6%, The parts by weight of this silicon dioxide are 150 parts, the time of vacuum stirring is changed to 22min, and the silane coupling agent is changed to a combination of KH330 and KH570, wherein, the parts by weight of KH330 is 0.3 parts, and the weight of KH570 The parts are 0.4 parts, the parts by weight of the catalyst dibutyltin diacetate are changed to 0.02 parts, and the antifungal agent is changed to 0.2 parts of zinc methyl arsenate with polyether polyol as the carrier. Change the time of continu...

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Abstract

The invention discloses a mildew-proof dealcoholization type organic silicon sealant. The mildew-proof dealcoholization type organic silicon sealant is prepared from the following components in parts by weight: 100 parts of 107 silicone oil, 10 to 150 parts of reinforcing filler, 0.3 to 1 parts of silane coupling agent, 0.01 to 0.5 part of catalyst, 5 to 7 parts of crosslinking agent, and 0.1 to 0.5 part of mildew-proof agent, wherein the mildew-proof agent is o-Arsanilic acid or methyl arsenic acid zinc using polyether glycol as a carrier. The mildew-proof dealcoholization type organic silicon sealant has the advantages that the mildew-proof effect is realized, and the anti-yellowing property is achieved.

Description

technical field [0001] The invention relates to a silicone sealant and a preparation method thereof, in particular to a mildew-proof dealcoholization silicone sealant and a preparation method thereof. Background technique [0002] Silicone sealants are widely used in construction, electronic appliances, building new energy and other industries due to their excellent high and low temperature resistance, excellent UV resistance and weather aging resistance. However, dealcohol-type silicone sealants generally have a disadvantage, such as black spots and yellowing, which are prone to appear after curing for a period of time. Dealcohol-type silicone sealants are disclosed in published patent documents, such as patent application number 201010574200.X. A mildew-resistant silicone sealant is developed, which is based on 107 glue with titanium catalyst and thiazole preservatives, but thiazole preservatives are easy to cause yellowing. For example, a "moisture-resistant, storage-sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J183/07C09J11/04C09J11/06C09K3/10
CPCC09J183/06C09J11/04C09J11/06C09J183/04C09K3/10C08L71/02C08K2003/265C08K5/59C08K3/36
Inventor 李军明陈刚
Owner 西卡(江苏)工业材料有限公司
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