A kind of alkoxy-terminated 107 glue and its preparation method and use

An alkoxy-terminated, oxygen-based technology, applied in the field of alkoxy-terminated 107 glue and its preparation, can solve the problems of complex process, poor storage stability, high cost, etc., achieve mild reaction conditions and improve storage stability , High sealing efficiency

Active Publication Date: 2017-04-12
兆舜科技(广东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of high activity and poor storage stability of the 107 glue prepared from the above-mentioned hydroxyl-terminated siloxane, as well as the problems of complex process, high requirements for process conditions and high cost in the prior art, the invention provides an alkoxy Base-capped 107 glue and preparation method thereof, the preparation method has simple process and low cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh dihydroxypolydimethylsiloxane and dimethyldichlorosilane in a molar ratio of 1:2 and add them to the reaction kettle to react for 30 minutes at 10°C. Add the acid-binding agent potassium carbonate, which is mixed with the generated hydrogen chloride mole Ratio 1.1:1, then add capping additive R' a SiOR” (4-a) , where a=0, R' is C 1 Hydrocarbon group, R" is C 1 Hydrocarbon group, R' a The molar ratio of SiOR” to dihydroxy polydimethylsiloxane is 1:2, react at 70°C for 2h, then raise the temperature to 100°C and keep it warm for 2h to remove the generated R”OCl, and the product alkoxyl Capping 107 glue.

[0034] The prepared alkoxy-capped 107 glue was detected, and 2% tetraisopropyl titanate was added to the product. It was measured that the product had no viscosity peak within 4 seconds, and was surface-dry in 10 minutes, and the surface capping reaction reached a very high level. Good results.

Embodiment 2

[0036] Weigh dihydroxypolydimethylsiloxane and dimethyldichlorosilane in a molar ratio of 1:1.5 and add them to the reaction kettle to react for 40 minutes at 8°C. Add the acid-binding agent sodium hydroxide, which will react with the generated hydrogen chloride The molar ratio is 1:1, then add the capping additive R' a SiOR”(4-a) , where a=1, R' is C 3 Hydrocarbon group, R" is C 3 Hydrocarbon group, R' a The molar ratio of SiOR” to dihydroxypolydimethylsiloxane is 1:1.5, react at 80°C for 1.5h, then raise the temperature to 90°C and keep it warm for 3h to remove the generated R”OCl, and the product alkoxy Base-capped 107 glue.

Embodiment 3

[0038] Weigh dihydroxypolydimethylsiloxane and dimethyldichlorosilane in a molar ratio of 1:2.5 and add them to the reaction kettle to react for 40 minutes at 15°C, and add the acid-binding agent sodium carbonate, which is mixed with the generated hydrogen chloride mole Ratio 1.5:1, then add capping additive R' a SiOR” (4-a) , where a=2, R' is C 20 Hydrocarbon group, R" is C 20 Hydrocarbon group, R' a The molar ratio of SiOR” to dihydroxypolydimethylsiloxane is 1:2.5, react at 60°C for 3h, then raise the temperature to 110°C and keep it warm for 1.5h to remove the generated R”OCl, and the product alkoxy Base-capped 107 glue.

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Abstract

The invention provides an alkoxy-terminated 107 adhesive and a preparation method thereof. The terminal group of the 107 adhesive is terminated by R'aSiOR''(4-a). The preparation method comprises the following steps: (1) adding dihydroxy polydimethylsiloxane and dimethyl dichlorosilane into a reaction kettle, reacting at 8-15 DEG C, and adding an acid-binding agent; (2) after the reaction in the step (1) finishes, continuing adding the R'aSiOR''(4-a), reacting at 60-80 DEG C, and after the reaction finishes, continuing heating to 90-110 DEG C, thereby preparing the product alkoxy-terminated 107 adhesive. When the alkoxy-terminated 107 adhesive is tested by a conventional detection method, the result proves that the termination reaction achieves favorable effect, has the advantages of mild conditions and high termination efficiency and can implement continuous production.

Description

technical field [0001] The invention belongs to the field of organosilicon, and in particular relates to an alkoxy-terminated 107 glue, a preparation method and application thereof. Background technique [0002] 107 is the basic rubber used in most varieties of room temperature vulcanized silicone rubber. It is an adhesive formed from a solution or emulsion with water as the medium. Because 107 glue has the characteristics of non-combustibility, low price, and convenient use, it is widely used in construction projects, and can be used as a base material for construction adhesives, various interior and exterior wall coatings, and floor coatings. [0003] The existing 107 glue is deacidified type, dealcoholized type and deketoxime type. Among them, the dealcoholized 107 glue has neutral properties, clean, non-toxic, non-corrosive, low cost and price, and sticks to glass and metal and other materials. Good connection performance and other advantages. However, most of the deal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/38C09J183/06C09D183/06
Inventor 黄永军蓝春霞尹邦志张斌
Owner 兆舜科技(广东)有限公司
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