Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for producing phosphonate-modified silicones

A phosphonate and organosiloxane technology, applied in the field of organosilicon compounds, can solve the problems of reduced reactive group concentration, slow reaction, undesired by-products of yield loss and the like

Inactive Publication Date: 2006-08-23
WACKER CHEM GMBH
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, this reaction requires long reaction times and high temperatures, which lead to rearrangement in the product and thus to loss of yield and undesired by-products
[0004] The reaction of trialkylphosphites with chloropropyl-modified siloxanes, as described in US Pat. High and difficult to distill and purify
However, the reaction proceeds slowly because the concentration of the reactive groups is greatly reduced by the dilution effect of the non-reactive dimethylsiloxy units, resulting in a reaction time in the range of several hours

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Embodiment 1 (not the present invention):

[0063] In a 250 ml three-necked pouring flask with a dropping funnel and a reflux condenser, precharge 99.7 g (0.6 mol) of triethyl phosphite (P(OEt) 3 , Aldrich, GC 98%). After heating to 140° C., 46.4 g (0.3 mol) of chloromethyldimethoxymethylsilane (Wacker Chemie GmbH, Munich) were slowly added dropwise within 3 hours under vigorous stirring. Subsequently, the reaction mixture was continued to be heated to 170° C. for 30 minutes. After removing the excess triethyl phosphite in vacuo, 58.6 g of phosphodiethoxycarboethoxymethyldimethoxymethylsilane (0.23 mol , GC 98%, yield: 76% of theory).

Embodiment 2

[0064] Embodiment 2 (not the present invention):

[0065] In a 250 ml three-necked pouring flask with a dropping funnel and a reflux condenser, precharge 124.5 g (0.75 moles) of triethyl phosphite (P(OEt) 3 , Aldrich, GC 98%). After heating to 140° C., 69.3 g (0.5 mol) of chloromethyldimethylmethoxysilane (Wacker Chemie GmbH, Munich) were slowly added dropwise over 2.5 hours with vigorous stirring. Subsequently, the reaction mixture was continued to be heated to 170° C. for 30 minutes. After removal of excess triethyl phosphite in vacuo, 100.4 g of phosphodiethoxycarboethoxymethyldimethylmethoxysilane ( 0.42 mol, GC 98.2%, yield: 83.6% of theory).

Embodiment 3

[0066] Embodiment 3 (not the present invention):

[0067] In a 250 ml three-necked pouring flask with a dropping funnel and a reflux condenser, precharge 112.2 g (0.675 moles) of triethyl phosphite (P(OEt) 3 , Aldrich, GC98%). After heating to 140° C., 76.8 g (0.45 mol) of chloromethyltrimethoxysilane (Wacker Chemie GmbH, Munich) were slowly added dropwise over 2.5 hours with vigorous stirring. Subsequently, the reaction mixture was continued to be heated to 170° C. for 30 minutes. After removal of excess triethyl phosphite in vacuo, 105.6 g of phosphodiethoxycarboethoxymethyltrimethoxysilane (0.39 mol, GC 97.4%, yield: 86.2% of theory).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Molecular weightaaaaaaaaaa
Average molecular weightaaaaaaaaaa
Average molecular weightaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for producing phosphonate-modified organosilicon compounds by reacting silanes containing phosphonate groups with reactive silicon compounds.

Description

technical field [0001] The present invention relates to a process for the production of organosilicon compounds modified with phosphonate esters by reaction of silanes containing phosphonate groups with reactive silicon compounds. Background technique [0002] Polysiloxanes modified with phosphonates are of great economic interest in many fields. They are used, for example, as lubricants on metals and textiles, flame retardant additives, adhesion promoters, cosmetic or detergent additives, defoamers, mold release agents, damping liquids, heat transfer fluids, antistatic agents or in Polishes and coatings. [0003] Phosphorus-modified polysiloxanes are usually carried out by reaction of trialkylphosphites with chloropropyl-modified siloxanes, as in Gallagher et al. J. Polym. Sci. A, Vol. 41 , pp. 48-59 (2003). Unfortunately, this reaction requires long reaction times and high temperatures, which lead to rearrangements in the products and thus to loss of yield and undesired...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08G77/395C07F9/40C08G77/30
CPCC07F9/4012C08G77/30C08G77/395
Inventor 奥利弗·舍费尔汉斯-约阿希姆·卢卡斯桑德拉·拉克尔
Owner WACKER CHEM GMBH