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Agent and method for suppressing dehydration condensation of silanol group, and method for manufacturing silanol-group-containing polyorganosiloxane, and composition for same

A technology of polyorganosiloxane and reaction inhibitor, which is applied in the field of manufacturing method of silanol group-containing polyorganosiloxane and its composition, can solve problems such as changes in physical properties, storage stability and the like

Pending Publication Date: 2021-11-09
KANEKA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the polyorganosiloxane obtained by the above method retains the silanol group which is a functional group exhibiting condensability, and also contains residual moisture, so the condensation reaction of the silanol group tends to proceed over time, resulting in a change in physical properties. , so storage stability becomes an issue

Method used

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  • Agent and method for suppressing dehydration condensation of silanol group, and method for manufacturing silanol-group-containing polyorganosiloxane, and composition for same
  • Agent and method for suppressing dehydration condensation of silanol group, and method for manufacturing silanol-group-containing polyorganosiloxane, and composition for same
  • Agent and method for suppressing dehydration condensation of silanol group, and method for manufacturing silanol-group-containing polyorganosiloxane, and composition for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0133] (Example 1) Synthesis of polyorganosiloxane

[0134] Add 20.3g of methyltrimethoxysilane, 127.1g of 3-glycidoxypropyltrimethoxysilane, 0.020g of dibutyl phosphate, and 18.5g of pure water to a 300ml four-necked flask, and set the temperature at 90°C heated in an oil bath and reacted for 4 hours. Then, use an evaporator and an oil bath set at 105°C to remove the generated methanol and residual water, then add 3.0 g of toluenesulfonyl isocyanate as a reaction inhibitor, stir until it becomes uniform, and obtain a silane Alcohol-based polyorganosiloxane solution 109.9 g. The NV of the obtained polyorganosiloxane was measured to be 88%, the weight average molecular weight was 3200, and the condensation rate was 50%.

Embodiment 2～13 and comparative example 1～8

[0136] A polyorganosiloxane solution was obtained in the same manner as in Example 1 except that the amount of raw materials used and the reaction conditions were set in accordance with the descriptions in the tables. In addition, in each table|surface, the unit of the compounding quantity of each component is gram (g).

[0137] (weight average molecular weight)

[0138] The weight average molecular weight of the polyorganosiloxane was determined by GPC. GPC was performed using HLC-8320GPC manufactured by Tosoh Corporation as a liquid delivery system, TSK-GEL type manufactured by Tosoh Corporation as a column, THF as a solvent, and the weight average molecular weight was calculated in terms of polystyrene.

[0139] ( 29 Si-NMR)

[0140] Structural units derived from monoorganotrialkoxysilanes are classified into structural units T1 forming one siloxane bond, structural units T2 forming two siloxane bonds, and structural units forming three siloxane bonds T3. Using AVANCEI...

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Abstract

The present invention provides an agent for suppressing dehydration condensation of a silanol group, comprising a beta-dicarbonyl compound and / or a sulfonyl isocyanate compound. The present invention provides a method for suppressing the progress of the aforementioned silanol group dehydration condensation reaction, by adding a beta-dicarbonyl compound and / or a sulfonyl isocyanate compound to a system including a compound having a silanol group. In the present invention, an alkoxysilane component containing a monoorgano-trialkoxysilane and / or a diorgano-dialkoxysilane is caused to undergo hydrolysis or dehydration condensation in the presence of water to form a polyorganosiloxane having a silanol group, a beta-dicarbonyl compound and / or a sulfonyl isocyanate compound as an agent for suppressing dehydration condensation of a silanol group is added to the polyorganosiloxane, and a polyorganosiloxane having a silanol group is produced.

Description

technical field [0001] The present invention relates to a silanol group-containing dehydration condensation reaction inhibitor, a method for inhibiting it, a method for producing a silanol group-containing polyorganosiloxane, and a composition thereof. Background technique [0002] In recent years, the demand for higher performance of organic resins has increased, and research has been actively underway to put polyorganosiloxanes into practical use as additives for improving the weather resistance, scratch resistance, and the like of organic resins. [0003] As a method for synthesizing a polyorganosiloxane, from the viewpoint of cost and handling properties, the method of hydrolyzing / dehydratingly condensing an organoalkoxysilane as a starting material in the presence of water is the most common. In general, polyorganosiloxane synthesized from organotrialkoxysilane as a main raw material can be suitably used in consideration of compatibility and reactivity with organic resi...

Claims

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Application Information

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IPC IPC(8): C08G77/08C08G77/16
CPCC08G77/08C08G77/16
Inventor 深海洋树松尾阳一键谷信二
Owner KANEKA CORP
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