Sealant with neutral and transparent silicone structure

A sealant and transparent technology, applied in the direction of adhesives, other chemical processes, chemical instruments and methods, etc., can solve the problems of poor bonding performance of substrates, low strength, low hardness, and inability to use, so as to ensure long-term safety. Effects of improving strength and hardness and increasing filling amount

Active Publication Date: 2012-07-25
ZHENGZHOU ZHONGYUAN SILANDE HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, for example, Chinese patent CN1482200A discloses an optically transparent room-temperature-curing silicone sealing compound and its preparation method. Because the added silica has a large surface area and less filling amount, its strength and hardness are relatively low; Moreover, the bonding performance to the base material is not good, and it only plays a sealing role on the building joints. It cannot be used in building curtain walls and lighting roofs that need to bear structural strength.
Other silicone structural sealants, because of the addition of silicate, calcium carbonate, carbon black and other filler materials, the strength, hardness and UV aging resistance of silicone structural sealants are significantly improved, but due to the inherent properties of fillers, Make them all have specific colors, such as CN1282773A, CN1110299A, which cannot be used when there are higher requirements for appearance and overall effect

Method used

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  • Sealant with neutral and transparent silicone structure
  • Sealant with neutral and transparent silicone structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The neutral transparent silicone structural sealant of the present invention is composed of the following components by weight:

[0035] Hydroxy-terminated polydimethylsiloxane:

[0036] 10000cp 10

[0037] 300000cp 70

[0038] Plasticizer: methyl silicone oil 20

[0039] Crosslinking agent:

[0040] Methyltributanoximinosilane 2.0

[0041] Vinyl tributylketoxime silane 3.6

[0042] Coupling agent: Aminopropyltrimethoxysilane 0.48

[0043] Catalyst: Dibutyltin diacetate 0.006

[0044] Fumed silica:

[0045] 60m 2 / g 15

[0046] 190m 2 / g 15

[0047] UV absorber: 2,4,6-tris(2'-butoxyphenyl)-1,3,5-triazine 0.05

[0048] Mix the above raw materials uniformly according to the conventional method to obtain a neutral transparent silicone structural sealant.

Embodiment 2

[0050] Transparent silicone structural sealant of the present invention, it is made up of following components by weight:

[0051] Hydroxy-terminated polydimethylsiloxane:

[0052]5000cp 30

[0053] 500000 cp 70

[0054] Plasticizer: ethyl silicone oil 50

[0055] Crosslinking agent:

[0056] Methyltributanoximinosilane 5.0

[0057] Dimethyldibutylketoximosilane 5.0

[0058] Coupling agent: mercaptopropyltriethyl / methoxysilane 3.0

[0059] Catalyst: Dibutyltin diacetate 0.5

[0060] Fumed silica:

[0061] 150m 2 / g 23.6

[0062] 170m 2 / g 16.4

[0063] Light stabilizer: 4-benzoyloxy-2,2,6,6-tetramethylpiperidine 0.2

[0064] Mix the above raw materials uniformly according to the conventional method to obtain a neutral transparent silicone structural sealant.

Embodiment 3

[0066] Transparent silicone structural sealant of the present invention, it is made up of following components by weight:

[0067] Hydroxy-terminated polydimethylsiloxane:

[0068] 20000cp 90

[0069] 200000 cp 10

[0070] Plasticizer: phenyl silicone oil 70

[0071] Crosslinking agent:

[0072] Vinyltributanoximinosilane 3.0

[0073] Dimethyldibutylketoximosilane 7.0

[0074] Coupling agent:

[0075] Mercaptopropyltriethyl / Methoxysilane 1.0

[0076] γ-(2.3 Glycidoxy)propyltrimethoxysilane 1.0

[0077] γ-(Methacryloyloxy)propyltrimethoxysilane 1.0

[0078] Catalyst: Dibutyltin dilaurate 0.08

[0079] Precipitated silica 50

[0080] Light stabilizer: hexamethylphosphoric triamide, tris(1,2,2,6,6-pentamethylpiperidinyl) phosphite 5.0

[0081] Mix the above raw materials uniformly according to the conventional method to obtain a neutral transparent silicone structural sealant.

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Abstract

The invention relates to a sealant with a neutral and transparent silicone structure, which comprises the following components in part by weight: 80 to 120 parts of hydroxyl-terminated polydimethylsiloxane, 10 to 80 parts of plasticizer, 5 to 15 parts of cross-linking agent, 0.3 to 5 parts of coupling agent, 0.05 to 0.1 part of catalyst, 30 to 100 parts of silicon dioxide and 0.01 to 10 parts of anti-yellowing agent. The sealant is mainly used for assembling, bonding and sealing structures such as glass lighting tops, point supported type curtain walls, suspended glass walls, hidden frame glass curtain walls and hollow glass thereof. The sealant has the advantages of yellowing resistance, aging resistance, no corrosion to base materials, high mechanical property, excellent performance of immergence resistance and water-ultraviolet irradiation resistance, and the like.

Description

technical field [0001] The invention belongs to the field of silicone structural sealant preparation, in particular to a neutral transparent silicone structural sealant. Background technique [0002] Modern architects have placed the communication between man and nature and the human visual effect in a very important position in the process of architectural design. Glass curtain walls and lighting roofs have become modern architectural features because of their "light, thin, and transparent" characteristics. an important part of . Most of the lighting roofs and point-supported curtain walls are made of transparent white glass and silver aluminum alloy profiles. If colored sealants are used together, it will affect the overall effect of the curtain wall and the visual appearance of people. The neutral transparent sealant can just make up for it. Its insufficient. [0003] Because silica is a reinforcing material and a good viscosity-increasing filler, the sealant must be re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J183/06C09J9/00C09K3/10
Inventor 张德恒张燕红张燕青安静
Owner ZHENGZHOU ZHONGYUAN SILANDE HIGH TECH CO LTD
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