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Cross-linkable products based on organosilicon compounds

A technology of organosilicon compound and cross-linking composition, which is applied in the direction of filling slurry, etc., and can solve the problems of short biocide activity time, discoloration, chemical instability, etc.

Inactive Publication Date: 2007-01-17
WACKER CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these effective substances have certain disadvantages, such as the presence of toxic heavy metals, the chemical instability of certain sealing material formulations, or the tendency to discolor
Other disadvantages of this biocide are that it must have some water solubility to be active
So the activity time of these biocides is very short

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0168] Manufacture of polyquaternary polysiloxanes:

[0169] Dissolve 286.4 g of dimethylammonium chloride in 1000 ml of water, add 1200 g of 1,3-bis(3-glycidoxypropyl)-1,1,3,3-tetramethyldisiloxane , and the mixture was refluxed with vigorous stirring. The reaction mixture was stirred at 105 to 110°C for 2 hours, where the batch changed from colorless turbidity to clear yellow. The solvent was removed in vacuo at 120°C. The reaction product is a viscosity of about 16×10 6 A dark yellow, highly viscous oil in mPa·s. 1 H-NMR spectral analysis indicated the formation of polyquaternary polysiloxanes having an average of 18 to 20 repeating units corresponding to the formula below.

[0170]

[0171] In a planetary mixer with vacuum equipment, under anhydrous conditions, 1400 grams of -OSi(OCH 3 ) 2 (CH 3 ) terminal group, polydimethylsiloxane with a viscosity of 80,000 mPa·s and 600 grams of -OSi(CH 3 ) 3 Polydimethylsiloxane terminated with a viscosity of 100 mPa·s, 12...

Embodiment 2

[0177] 1400 g of α,ω-dihydroxypolydimethylsiloxane with a viscosity of 80,000 mPa·s, 12 g of polyquaternary polysiloxane produced as described in Example 1 were mixed under vacuum in a planetary mixer. Oxane, 300 grams have -OSi (CH 3 ) 3Polydimethylsiloxane with a terminal group and a viscosity of 100 mPa·s, a dynamic viscosity of 6.2 mm2 / s (at 40°C) for 300 g, a viscosity density constant (VDK) of 0.79, and a boiling range of 300°C to 370°C (carbon distribution: 62% paraffin carbon atoms, 38% cycloalkane carbon atoms and 0.03% aromatic hydrocarbon carbon atoms) hydrocarbon mixture, 90 grams of ethyl triacetoxysilane and 190 grams of specific surface area of ​​150 square meters / grams of fumed hydrophilic silica to be uniformly mixed. Then 0.5 g of dibutyltin diacetate were added and homogenization was carried out for a further 5 minutes.

[0178] Test specimens as described in Example 1 were prepared from the compositions thus obtained and tested according to DIN ENI ISO...

Embodiment 3

[0181] The procedure described in Example 1 was repeated except that the amount of polyquaternary polysiloxane was doubled.

[0182] Test specimens as described in Example 1 were prepared from the compositions thus obtained and tested according to DIN ENI ISO 846. The obtained results are shown in Table 1.

[0183] To determine storage stability, the samples were stored at 100° C. for 3 days in air-moisture-tight containers. There was no change in the curing characteristics or appearance of the samples, which indicates outstanding storage stability and resistance to yellowing.

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Abstract

The invention relates to cross-linkable products based on organosilicon compounds and exhibiting biostatic properties and to a method for the production and use thereof, wherein the inventive cross-linkable products contain organosilicon compounds of quaternary ammonium groups.

Description

technical field [0001] The present invention relates to a cross-linkable composition with bioinhibitory properties, its production method and its use, which mainly consist of organosilicon compound. Background technique [0002] One-component sealant compositions which vulcanize on contact with water to elastomers at room temperature are known which are storable under anhydrous conditions. The product is used extensively, for example in the construction industry. Especially in environments with high air humidity, such as bathrooms, kitchens and tropical regions, organisms such as fungi and algae tend to grow on the surface of the sealant composition. In order to prevent such a situation, biocides, such as fungicides, are usually added to the sealant composition to prevent the growth of microorganisms. Examples of fungicides used in the sealant composition are: methylbenzimidazol-2-yl carbamate (Carbendazim, Carbendazim), 10,10'-oxybisphenoxopyr, 2- (4-thiazolyl)benzimidaz...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08G77/26C08L83/08C08G77/452C09D5/34
CPCC08G77/14C08G77/26C08L83/04C08L83/08C08G77/18C09D5/34C08G77/452C08G77/16C08G77/24C08L83/00C08L2666/44C08L2666/66
Inventor 乌韦·谢姆克里斯蒂安·奥克斯加布里埃莱·迪奈格
Owner WACKER CHEM GMBH
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