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Cross-linkable masses based on organosilicon compounds

A technology of organosilicon compounds and compositions, applied in the field of cross-linkable compositions, can solve the problems of ineffectiveness and instability in construction use

Active Publication Date: 2011-11-23
WACKER CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the compositions described therein using alkoxy-functional silanes are unstable on storage but cure in a relatively short period of time when the polymer component is mixed with a crosslinker
Such a composition is not good for construction purposes

Method used

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  • Cross-linkable masses based on organosilicon compounds
  • Cross-linkable masses based on organosilicon compounds
  • Cross-linkable masses based on organosilicon compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0175] 350g viscosity is 8000mPas α, ω-dihydroxy polydimethylsiloxane, 150g viscosity is 1000mPas α, ω-trimethylsiloxypropyl polydimethylsiloxane, 13.6g 4-( Triethoxysilylmethyl)-tetrahydro-1,4-oxazine, 20.0g of vinyltriethoxysilane; 12.0g of tetraethoxysilane, 4.43g of 1,3,5- Three (3-trimethoxysilylpropyl) isocyanurate, 1 part by weight of 4.43 g of methyltriethoxysilane hydrolysis oligomer with an average of 10 Si atoms per molecule and 1 part by weight A mixture of 3-aminopropyltriethoxysilane and 4.43 g of 3-glycidoxypropyltrimethoxysilane were thoroughly mixed with each other in a planetary dissolver for 15 minutes. After that, add 45.0g of BET with a surface area of ​​150m 2 / g of hydrophilic fumed silica (purchased from Munich, Germany Wacker Chemie AG. company, the name is V15), and continue mixing for 15 minutes. Subsequently, mixing was completed by adding a mixture of 0.36 g of zinc bis(2-ethylhexanoate) and 0.24 g of bis(2-ethylhexanoate-O)-μ-zinc oxide. For ...

Embodiment 2

[0180] 350g of α with a viscosity of 80000mPas, ω-dihydroxypolydimethylsiloxane, 200g of α with a viscosity of 1000mPas, ω-trimethylsiloxypolydimethylsiloxane, 22.0g of 4-(triethyl Oxysilylmethyl)-tetrahydro-1,4-oxazine, 15g of vinyltriethoxysilane, 10.0g of 1,3,5-tris(3-trimethoxysilylpropyl ) isocyanurate, and 11.0 g of 3-glycidoxypropyltrimethoxysilane were thoroughly mixed with each other in a planetary mixer for 15 minutes. Subsequent addition of 36g of BET has a surface area of ​​150m 2 / g of hydrophilic fumed silica (purchased from Wacker Chemie AG company in Munich, Germany, the name is V15) and 616 g of finely ground marble coated with stearic acid and having an average particle size (D50%) of about 5.0 μm (obtained from OMYA, Cologne, Germany, under the name "OMYABOND 520FL"), the mixing was continued for 20 minutes. Then by adding 0.46 g of dioctyltin oxide in tetraisopropoxysilane (available from TIB Chemicals AG, Mannheim, Germany, under the name "TK217") and 3...

Embodiment 3

[0183] 350g of α with a viscosity of 80000mPas, ω-dihydroxypolydimethylsiloxane, 200g of α with a viscosity of 1000mPas, ω-trimethylsiloxypolydimethylsiloxane, 22.0g of 4-(triethyl oxysilylmethyl)-tetrahydro-1,4-oxazine, 15g of vinyltriethoxysilane, and 11.0g of 1,3,5-tris(3-trimethoxysilylpropane base) isocyanurates were thoroughly mixed with each other in a planetary mixer for 15 minutes. Then add 45g of BET with a surface area of ​​150m 2 / g of hydrophilic fumed silica (purchased from Wacker Chemie AG company in Munich, Germany, trade name is V15) and 616 g of finely ground limestone (obtained from OMYA, Cologne, Germany under the name "OMYA BLR 3") coated with stearic acid and having an average particle size (D50%) of about 5.0 μm, and mixing was continued for 20 minutes. Then by adding 0.46 g of dioctyltin oxide in tetraisopropoxysilane (purchased from TIB Chemicals AG company in Mannheim, Germany, named "TK217") and 3.0 g of 50 wt% concentration in methyl A mixture o...

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Abstract

The invention relates to masses that can be cross-linked through a condensation reaction and that can be produced using (A) organosilicon compounds comprising at least two condensable groups, (B) organosilicon compounds of the formula (R3O)3-nSiR2 n- (CR1 2)m-NR7-CO-R8 (I) and / or partial hydrolyzates thereof, (C) heterocyclic compounds of the formula A[CR4 2SiR5 a(OR6)3-a]x (V) and / or partial hydrolyzates thereof, possibly (D) epoxy-functional organosilicon compounds, and possibly (E) calcium carbonate coated with stearic acid, wherein all groups and indices have the meaning indicated in claim 1.

Description

technical field [0001] The present invention relates to crosslinkable compositions based on organosilicon compounds comprising heterocyclic substituents, a process for their preparation and their use. Background technique [0002] One-component sealants are already known which can be stored in the absence of water and which can be cured to elastomers (RTV-1 compositions) by the addition of water at room temperature. For example, these products are used extensively in the construction industry. The basis of these mixtures are polymers terminated by silyl groups carrying reactive substituents such as OH groups or hydrolysable groups such as alkoxy groups. Of particular importance for professional applications are neutral crosslinking sealants with high filler content, since such compositions have particularly good processability. Of particular interest for this use are the so-called alkoxy-crosslinking sealants, since during curing they do not release unpleasant elimination ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/26
CPCC08K5/548C08K5/5442C08K5/5455C08G77/26C08G77/16C08L83/04C08K5/5477C08G77/04C08K3/26C08K9/04
Inventor 乌韦·施姆德特勒夫·奥斯藤多尔夫
Owner WACKER CHEM GMBH