Organosilicon compounds
Transesterified organosilicon compounds, including ionic organosilicon compounds and coupling agents, and aqueous-based compositions including transesterified organosilicon compounds are provided. Compositions comprising at least one transesterified organosilicon are suitable for application to various inorganic, organic and cullulosic surfaces for imparting water repellency and improved wetting. Compositions comprising transesterified organosilicon compounds exhibit reduced flammability, improved hydrolytic stability, reduced gloss and improved water repellency while maintaining reactivity with various substrates.
1. A transesterified ionic organosilicon compound selected from the group consisting of:
where in each formula:
Y is (OCH 2 CH 2 ) n OH radical where n has a value of one through ten, or [OC 3 H 6 ] n OH (propylene glycol) radical where n has a value of one through ten, or [C 3 H 7 O 3 ], (glycerol) radical;
R′ is an alkyl radical including one to three carbons, or (OCH 2 CH 2 ) n OH radical where n has a value of one through ten, or [OC 3 H 5 ] n OH (propylene glycol) radical where n has a value of one through ten, or [C 3 H 7 O 3 ] (glycerol) radical, or [O(CH 2 ) m CH 3 ] radical where m has a value of 0, 1, 2 or 3, or (CH 3 OCH 2 CH 2 O) radical, or (CH 3 CH 2 OCH 2 CH 2 O) radical; R″ is an alkyl radical including one to three carbons, or [O(CH 2 ) m CH 3 ] radical where m has value 0, 1, 2 or 3 or (CH 3 OCH 2 CH 2 O) radical, or (CH 3 CH 2 OCH 2 CH 2 O) radical; R′″ is an alkylene group including one to four carbon atoms; R iv , R v and R vi are alkyl groups including one to twenty two carbon atoms wherein at least one such group is larger than eight carbon atoms, —CH 2 C 6 H 5 , —CH 2 CH 2 OH, —CH 2 OH, and=(CH 2 ) x NHC(O)R vii wherein x has a value of from two to ten and R vii is a perfluoroalkyl radical having one to twelve carbon atoms; X is chloride, bromide, fluoride, iodide, acetate or tosylate; and Z is a positively charged aromatic pyridinium ring of formula C 5 H 5 N + .
2. A transesterified ionic organosilicon according to claim 1 , wherein the ionic organosilicon compound is selected from the group consisting of:
(i) 3-[(2-hydroxyethoxy)dimethoxysilyl]2-methylpropyldimethyloctadecyl ammonium chloride;
(ii) 3-[di(2-hydroxyethoxy)methoxysilyl]2-methylpropyldimethyloctadecyl ammonium chloride
(iii) 3-[(2-hydroxyethoxy)diethoxysilyl]2-methylpropyldimethyloctadecyl ammonium chloride; and (viii) 3-[di(2-hydroxyethoxy)ethoxysilyl]2-methylpropyldimethyloctadecyl ammonium chloride.
3. An aqueous-based composition consisting essentially of at least one transesterified ionic organo silicon compound of claim 1 .
4. The aqueous-based composition of claim 3 , wherein said composition comprises only one transesterified ionic organosilicon compound.
5. The aqueous-based composition of claim 4 , wherein said transesterified ionic organosilicon compound is 3-[(2-hydroxyethoxy)dimethoxysilyl]2-methylpropyldimethyloctadecyl ammonium chloride.
6. The aqueous-based composition of claim 4 , wherein said transesterified ionic organosilicon compound is 3-[di(2-hydroxyethoxy)methoxysilyl]2-methylpropyldimethyloctadecyl ammonium chloride.
7. The aqueous-based composition of claim 4 , wherein said transesterified ionic organosilicon compound is 3-[(2-hydroxyethoxy)diethoxysilyl]2-methylpropyldimethyloctadecyl ammonium chloride.
8. The aqueous-based composition of claim 4 , wherein said transesterified ionic organosilicon compound is 3-[di(2-hydroxyethoxy)ethoxysilyl]2-methylpropyldimethyloctadecyl ammonium chloride.
9. The aqueous-based composition of claim 4 , wherein said one transesterified ionic organosilicon compound comprises between about 0.1 to about 10 weight percent of said aqueous-based composition.