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Room-temperature curing ethyl lactate removal type silicone sealant

A silicone sealant, ethyl lactate technology, used in adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problems of pungent, corrosive odor of cement substrates, and slow deep curing. , to achieve the effect of moderate curing speed and simple production process

Inactive Publication Date: 2017-12-29
山东三泽硅胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above types have the following problems respectively: 1. The acetic acid released by the deacetate type during the curing process has a corrosive effect on metal and cement substrates and has a pungent smell; 2. The butanone oxime type releases butanone oxime during the curing process , butanone oxime has been included in the list of potential carcinogen chemicals by the European Union; 3. The dealcoholization type releases methanol / ethanol during the curing process, but the hydroxyl-terminated polydimethylsiloxane is prone to condensation reaction with the catalyst to produce a viscosity peak , the deep curing speed is slow

Method used

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  • Room-temperature curing ethyl lactate removal type silicone sealant
  • Room-temperature curing ethyl lactate removal type silicone sealant
  • Room-temperature curing ethyl lactate removal type silicone sealant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 40 parts of α,ω-dihydroxy polydimethylsiloxane with a viscosity of 20000mPa.s at 25°C and 60 parts of methyl polydimethylsiloxane with a viscosity of 350mPa.s at 25°C are pre-dried Add 170 parts of active nano-calcium carbonate into the kneader and heat up to 110°C to 120°C, knead for 1.5 hours under the condition of vacuum degree of -0.09MPa, then cool down to room temperature, transfer the above materials to the planetary mixer, and then add methyl 13 parts of ethyl trilactate silane, 5 parts of 3-aminopropyltriethoxysilane, 0.3 part of dibutyltin dilaurate, mixed for 40 minutes at a vacuum degree of -0.09MPa and a speed of 35rpm to obtain a room temperature curing Ethyl lactate type silicone sealant (see Table 1 for performance test results).

Embodiment 2

[0026] 60 parts of α, ω-dihydroxy polydimethylsiloxane with a viscosity of 80000mPa.s at 25°C and 55 parts of methyl polydimethylsiloxane with a viscosity of 100mPa.s at 25°C are pre-dried Add 98 parts of active nano-calcium carbonate into the kneader and raise the temperature to 110°C~120°C, knead for 1.5 hours under the condition of vacuum degree of -0.09MPa, then cool down to room temperature, transfer the above materials to the planetary mixer, and then add vinyl 15 parts of ethyl trilactate silane, 7 parts of 3-aminopropyltriethoxysilane, 0.5 part of dibutyltin dilaurate, mixed for 40 minutes at a vacuum degree of -0.09MPa and a speed of 35rpm to prepare a room temperature curing Ethyl lactate type silicone sealant (see Table 1 for performance test results).

Embodiment 3

[0028] 40 parts of α, ω-dihydroxy polydimethylsiloxane with a viscosity of 20000mPa.s at 25°C and 60 parts of methyl polydimethylsiloxane with a viscosity of 100mPa.s at 25°C are pre-dried Add 170 parts of active nano-calcium carbonate into the kneader and heat up to 110°C to 120°C, knead for 1.5 hours under the condition of vacuum degree of -0.09MPa, then cool down to room temperature, transfer the above materials to the planetary mixer, add methyl 8 parts of ethyl trilactate silane, 5 parts of vinyl trilactate ethyl silane, 5 parts of 3-aminopropyltriethoxysilane, 0.3 part of dibutyltin dilaurate, at a vacuum degree of -0.09MPa, at a speed of 35rpm After mixing for 40 minutes under the same conditions, a room temperature curing delactate type silicone sealant was prepared (see Table 1 for performance test results).

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Abstract

The invention discloses a room-temperature curing ethyl lactate removal type silicone sealant which comprises the following components in parts by weight: 10-60 parts of alpha-omega-dyhydroxy polydimethylsiloxane, 30-150 part of methyl polydimethylsiloxane, 80-200 parts of active nano calcium carbonate, 5-20 parts of an ethyl lactate cross-linking agent, 0.5-10 parts of a saline coupling agent and 0.1-5 parts of a catalyst. Due to adoption of the ethyl lactate cross-linking agent, environmental-friendly ethyl lactate micromolecule substances can be released in the curing process, a substrate is not corroded, a moderate deep layer curing speed is achieved, the sealant is adopted for adhering and sealing various products, has the advantages of environmental-friendliness and no corrosion, and is simple in production process and applicable to large-scale industrial production.

Description

technical field [0001] The invention relates to the field of polymer material manufacturing, in particular to a room-temperature curing delactated ethyl ester type silicone sealant. Background technique [0002] At present, according to the curing system, there are three types of silicone sealants: deacetate type, deketoxime type, and dealcoholized type, which release acetic acid, butanone oxime, and methanol / ethanol during the curing process. The above types have the following problems respectively: 1. The acetic acid released by the deacetate type during the curing process has a corrosive effect on metal and cement substrates and has a pungent smell; 2. The butanone oxime type releases butanone oxime during the curing process , butanone oxime has been included in the list of potential carcinogen chemicals by the European Union; 3. The dealcoholization type releases methanol / ethanol during the curing process, but the hydroxyl-terminated polydimethylsiloxane is prone to cond...

Claims

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Application Information

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IPC IPC(8): C09J183/04C09J183/06C09J11/04C09J11/06
CPCC08K2201/011C08L2205/02C08L2312/08C09J11/04C09J11/06C09J183/04C09J183/06C08L83/06C08K9/04C08K3/26C08K5/544C08K5/5425C08K5/5419C08L83/04
Inventor 冀福全
Owner 山东三泽硅胶有限公司
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