Modified alkoxylation products having at least one non-terminal alkoxy silyl group, with increased storage stability and improved elongation, and polymers produced using said products

A technology of alkoxysilyl and alkoxylation, which is used in the field of adhesives and sealants containing alkoxysilyl, which can solve the problems of deprivation of freedom and achieve improved fluidity and good processability Sexual, high-strength effects

Inactive Publication Date: 2017-09-26
EVONIK DEGUSSA GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] However, this solution has gained only limited acceptance because the formulator who formulates the base polymer by having to add defined components intended to affect the viscosity of the formulation is deprived of an important degree of freedom – namely, according to his or Her will changes degrees of freedom for free preparation

Method used

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  • Modified alkoxylation products having at least one non-terminal alkoxy silyl group, with increased storage stability and improved elongation, and polymers produced using said products
  • Modified alkoxylation products having at least one non-terminal alkoxy silyl group, with increased storage stability and improved elongation, and polymers produced using said products
  • Modified alkoxylation products having at least one non-terminal alkoxy silyl group, with increased storage stability and improved elongation, and polymers produced using said products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0238] Embodiment 1 (the present invention):

[0239] Synthesis of PPG-based alkoxysilyl-functional polyethers:

[0240] A 5 liter autoclave was charged with 500 g of PPG 2000 and 150 ppm (based on total batch) of zinc hexacyanocobaltate-double metal cyanide catalyst was added. The reactor was inerted by filling with nitrogen to a pressure of 3 bar and then depressurizing to atmospheric pressure. This operation was repeated two more times. While stirring, the contents of the reactor were heated to 130°C and evacuated to about 20 mbar to remove volatile components. After 30 minutes, the catalyst was activated by metering 60 g of propylene oxide into the evacuated reactor. The internal pressure initially rises to about 0.9 bar. After about 9 minutes, the reaction started, which was seen by the drop in reactor pressure. Then, 1250 g of propylene oxide were metered in continuously over about 55 minutes. This was followed by a further reaction of one hour during which the tem...

Embodiment 2

[0241] Embodiment 2 (the present invention):

[0242] Synthesis of PPG-based alkoxysilyl-functional polyethers:

[0243] A 5 liter autoclave was charged with 333 g of PPG 2000 and 150 ppm (based on total batch) of zinc hexacyanocobaltate-double metal cyanide catalyst was added. The reactor was inerted by filling with nitrogen to a pressure of 3 bar and then depressurizing to atmospheric pressure. This operation was repeated two more times. While stirring, the contents of the reactor were heated to 130°C and evacuated to about 20 mbar to remove volatile components. After 30 minutes, the catalyst was activated by metering 50 g of propylene oxide into the evacuated reactor. The internal pressure initially rises to about 0.9 bar. After about 15 minutes, the reaction started, which was seen by the drop in reactor pressure. Then, 117 g of propylene oxide were metered in continuously over about 5 minutes. Thereafter a further reaction was carried out for 1 hour. A mixture of 5...

Embodiment 3

[0245] Embodiment 3 (comparative embodiment):

[0246] Capping of the polyether from example 1 with isophorone diisocyanate (process according to EP 2636696):

[0247] 750.8 g of the silylpolyether from Example 1 were first charged under nitrogen into a 1 l three-necked flask with a precision glass stirrer and heated to 70°C. Then 33.4 g of IPDI were added, the mixture was stirred for 5 minutes, and 0.05 ml of TIB Kat 216 (dioctyltin dilaurate) was added. The mixture was stirred for 45 minutes, and 67.8 g of the general formula C were added 4 h 9 O[CH 2 CH(CH 3 )O] 5.6 H polyethers. The mixture was then stirred for a further 5 hours at 70°C.

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Abstract

The present invention relates to special alkoxylation products, a method for the production thereof, compositions which contain said alkoxylation products, and to the use thereof.

Description

technical field [0001] The present invention relates to specific alkoxylation products, processes for their preparation, compositions comprising these alkoxylation products and their use more particularly as adhesives and sealants containing alkoxysilyl groups . Background technique [0002] The use of adhesives and adhesive sealants is playing an increasingly important role in numerous operating procedures and manufacturing processes, where the adhesive sealant additionally fulfills a sealing function. Compared to other joining processes, such as welding or riveting, for example, these processes offer advantages in terms of weight and cost, but also in terms of stress transfer between the joined components. [0003] Furthermore, compared to the joining of dissimilar materials, adhesive bonding has the advantage that it is able to compensate for differences in deformation behavior and thermal expansion coefficients between the materials, especially when elastic adhesives ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/22C08G65/332
CPCC08G65/22C08G65/3322C08G77/445C08G77/46
Inventor M·勒贝特A·莱温W·克诺特F·舒伯特M·费伦茨H·哈恩D·沃伊塔希克C·艾勒茨
Owner EVONIK DEGUSSA GMBH
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