Silicone sealant and its preparation method

A technology of silicone sealant and hydroxy polysiloxane, applied in the field of sealant, can solve problems such as carbon chain breakage, high viscosity peak, and slow rubber vulcanization speed

Inactive Publication Date: 2014-07-09
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the market prospect of construction sealants is booming, there are still many problems in the production and use of many sealant products, such as excessively high viscosity peaks during the production process; slow vulcanization of the rubber during use; and sealing Under hot and humid conditions, the glue may breed various molds
In order to improve the adaptability of the sealant under various environmental conditions, it is necessary to carry out anti-mold treatment on the sealant, otherwise it will cause biodegradation due to the erosion of mold and secretions, resulting in the breakage of the carbon chain in the molecular structure of the sealant. The performance is compromised, and even more harmful, which affects the production cost, threatens the quality of the sealant and brings losses to the construction project

Method used

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  • Silicone sealant and its preparation method
  • Silicone sealant and its preparation method
  • Silicone sealant and its preparation method

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preparation example Construction

[0036] The present invention also provides a preparation method of silicone sealant, comprising: mixing 20-70 parts by weight of matrix resin and 30-90 parts by weight of reinforcing agent, and stirring to obtain the base glue;

[0037] 0.1-20 parts by weight of silane coupling, 1-20 parts by weight of color paste, 0.001-10 parts by weight of catalyst, 0.1-10 parts by weight of cross-linking agent, 0.1-20 parts by weight of mineral oil, 1-10 parts by weight of One part antifungal agent is mixed with the base glue and stirred to obtain stone silicone sealant.

[0038] According to the present invention, in the process of preparing the silicone sealant, the preparation of the base glue is first carried out, and the base glue is the colloid obtained by mixing the matrix resin and the reinforcing agent. In order to make the performance of the silicone sealant better Excellent, as a preferred solution, the preparation method of the base glue is specifically:

[0039] Put 1 / 2~2 / 3 of ...

Embodiment 1

[0048] Preparation of base glue Start the kneader and pump in 25 parts by weight of α, ω-dihydroxy polysiloxane, feed while kneading, adjust the speed of the kneader to 50r / min; gradually put in 60 parts by weight of active nano-calcium carbonate and 10 parts by weight of heavy calcium carbonate, the rotating speed of the kneader is 50r / min, the temperature of the kneading material is 110°C, the rotating speed is 50r / min, when the kneading temperature rises to 110°C, the vacuum is pumped to -0.04~-0.1 After kneading for 4 hours at Mpa; then vacuumize the kneader, open the thinner valve, pump in the remaining 25 parts by weight of α, ω-dihydroxypolysiloxane, adjust the speed of the kneader to 50r / min, and wait until the base resin is completely pumped. After filling, close the suction valve, open the vacuum valve, evacuate to -0.04~-0.1Mpa, vacuumize and knead for 2 hours, remove the vacuum and turn on the circulation pump, and circulate for 10 minutes while stirring at a speed ...

Embodiment 2

[0052] Preparation of the base glue Start the kneader and pump in 10 parts by weight of α, ω-dihydroxypolysiloxane, feed while kneading, adjust the speed of the kneader to 50r / min, and gradually put in 70 parts by weight of active nano Calcium carbonate and 20 parts by weight of light calcium carbonate, the speed of the kneader is 50r / min, kneading until the temperature of the material rises to 110 ° C; Knead for 4 hours after Mpa, the speed of the kneader is 50r / min. Then the vacuum is released, the thinner valve is opened, and the remaining 10 parts by weight of α, ω-dihydroxypolysiloxane is sucked in. The rotating speed of the kneader is 50r / min. After the base resin is completely sucked in, the suction valve is closed. Open the vacuum valve, evacuate to -0.04~-0.1Mpa, evacuate and knead for 2 hours, remove the vacuum and turn on the circulation pump, and circulate for 10 minutes while stirring at a speed of 50r / min to obtain the base glue.

[0053] The preparation of colo...

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Abstract

The invention provides a silicone sealant, which comprises 20-70wt parts of matrix resin, 30-90wt parts of strengthening agent, 0.1-20 wt parts of silane coupling agent, 1-20wt parts of color paste, 0.001-10wt parts of catalyst, 0.1-10wt parts of cross-linking agent, 0.1-20wt parts of mineral oil and 1-10wt parts of mildew inhibitor. According to the invention, a mildew inhibitor with wide spectrum mildew resistance is introduced in the silicone sealant, an active function group in the cross-linking agent and matrix resin are subjected to crosslinking effect, so that the sealant is solidified, and the sealant has mildew resistance performance; additionally, the strengthening agent and the silane coupling agent are added for increasing the strength and cohesiveness of the silicone sealant.

Description

technical field [0001] The invention relates to the technical field of sealants, in particular to a silicone sealant and a preparation method thereof. Background technique [0002] Silicone sealant is a kind of sealant, which belongs to the same system as glass glue, that is, a substance formed of materials such as sodium silicate, silicone and silicone structural polymers. Silicone sealant has excellent resistance to weather, heat and humidity, ultraviolet rays and ozone aging performance, and is one of the preferred materials for building sealants. With the modernization of urban buildings, the progress of design and construction, the upgrading of decoration grades, and the continuous improvement of functional requirements for building energy saving, waterproof, heat insulation, sound insulation and comfort, the development of silicone sealants has a good market atmosphere. [0003] Although the market prospect of construction sealants is booming, there are still many pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J11/04C09K3/10
Inventor 董德文梁永久张勋
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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