Aldehyde-modified silicone and method for producing same
AssigneeShin-Etsu Chemical Co., Ltd.
InventorShoji FUJITA
Life of this patent
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Abstract
Provided are a high-purity aldehyde-modified silicone and a method for producing the aldehyde-modified silicone in which a competitive reaction in which a hydrosilyl group is added to a carbonyl group of an aldehyde does not proceed. An aldehyde-modified silicone having one or two aldehyde groups per molecule is represented by the following formula (1): wherein A is a linear or branched alkylene group (—R—) or alkyleneoxyalkylene group (—R—O—R—) and is an organic group having one or two aldehyde groups at an end thereof, R1 is independently an alkyl group or the like, a is 0<a≤3, b is 0<b≤200, c is 0≤c≤1, and dis 0≤d≤1, provided that 1≤a+b+c+d≤200.
Claims7
An aldehyde-modified silicone having one or two aldehyde groups per molecule, the aldehyde-modified silicone being represented by the following formula (1):
- wherein A is a linear or branched alkylene group (—R—) or alkyleneoxyalkylene group (—R—O—R—) having 2 to 20 carbon atoms and is an organic group having one or two aldehyde groups at an end thereof, R1 is independently a group selected from an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, and an aralkyl group having 7 to 10 carbon atoms, a is 0<a≤3, bis 0<b≤200, c is 0≤c≤1, and dis 0≤d≤1, provided that 1≤a+b+c+d≤200.
A method for producing an aldehyde-modified silicone represented by the following formula (1):
- wherein A is a linear or branched alkylene group (—R—) or alkyleneoxyalkylene group (—R—O—R—) having 2 to 20 carbon atoms and is an organic group having one or two aldehyde groups at an end thereof, R1 is independently a group selected from an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, and an aralkyl group having 7 to 10 carbon atoms, a is 0<a≤3, bis 0<b≤200, c is 0≤c≤1, and dis 0≤d≤1, provided that 1≤a+b+c+d≤200,
- the method comprising oxidizing a hydroxymethyl group of a carbinol-modified silicone to produce the aldehyde-modified silicone, said carbinol-modified silicone being represented by the following formula (7):
- wherein A′ is a linear or branched alkylene group (—R—) or alkyleneoxyalkylene group (—R—O—R—) having 2 to 20 carbon atoms and is an organic group having one or two hydroxymethyl groups at an end thereof, R1 is independently a group selected from an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, and an aralkyl group having 7 to 10 carbon atoms, a is 0<a≤3, b is 0<b≤200, c is 0≤c≤1, and d is 0≤d≤1, provided that 1≤a+b+c+d≤200.
Dependencies are inferred from the claim text.