Back to results
US 10,876,019 B2Granted
Polyorganosiloxane compositions containing a 2-substituted-1-alkynyl-1-cyclohexanol useful as a hydrosilylation reaction inhibitor
AssigneeDow Silicones Corporation
InventorsZhanjie Li, Zhenbin Niu
Life of this patent
Estimating the term…
Abstract
A hydrosilylation curable composition includes a new 2-substituted-1-alkynyl-1-cyclohexanol as an inhibitor. The hydrosilylation curable composition is useful for preparing release coatings for packaging applications.
Claims18
A curable composition comprises:
- A) a polyorganosiloxane containing at least two silicon-bonded aliphatically unsaturated groups per molecule;
- B) a polyorganohydrogensiloxane having an average, per molecule, of at least 2 silicon bonded hydrogen atoms;
- with the provisos that
- when starting material A) has an average, per molecule, of 2 silicon aliphatically unsaturated groups, then starting material B) has an average, per molecule, of greater than 2 silicon bonded hydrogen atoms;
- and
- when starting material B) has an average, per molecule, of 2 silicon bonded hydrogen atoms, then starting material A) has an average, per molecule, of greater than 2 silicon bonded aliphatically unsaturated groups;
- C) a hydrosilylation-reaction catalyst;
- and
- D) a 2-substituted 1-alkynyl-1-cyclohexanol, where starting material D) has general formula
- where R3 is an alkynyl group having at least 2 carbon atoms, each R is methyl or isopropyl, subscript v is 0 to 2, subscript w is 0 to 2, subscript x is 0 to 2, subscript y is 0 to 2, subscript z is 0 to 2, with the provisos that a quantity (v+w+x+y+z)>1, and a quantity (y+z) is 1 to 4.
7 more elements
A method for forming a coating a substrate comprising:
- 1) applying to a substrate a curable composition comprising
- A) a polyorganosiloxane containing at least two silicon-bonded aliphatically unsaturated groups per molecule;
- B) a polyorganohydrogensiloxane having an average, per molecule, of at least 2 silicon bonded hydrogen atoms;
- with the provisos that
- when starting material A) has an average, per molecule, of 2 silicon aliphatically unsaturated groups, then starting material B) has an average, per molecule, of greater than 2 silicon bonded hydrogen atoms;
- and
- when starting material B) has an average, per molecule, of 2 silicon bonded hydrogen atoms, then starting material A) has an average, per molecule, of greater than 2 silicon bonded aliphatically unsaturated groups;
- C) a hydrosilylation-reaction catalyst;
- and
- D) a 2-substituted 1-alkynyl-1-cyclohexanol, where starting material D) has general formula
- where R3 is an alkynyl group having at least 2 carbon atoms, each R is methyl or isopropyl, subscript v is 0 to 2, subscript w is 0 to 2, subscript x is 0 to 2, subscript y is 0 to 2, subscript z is 0 to 2, with the provisos that a quantity (v+w+x+y+z)>1, and a quantity (y+z) is 1 to 4,
- optionally 2) treating the substrate before applying the composition, and 3) heating the composition, thereby curing composition to form the coating on the substrate.
9 more elements
Dependencies are inferred from the claim text.