Siloxane compositions comprising an alkylated cyclosiloxane and linear alkylated siloxane mixture
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorEl Sayed Arafat
Life of this patent
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Abstract
The present invention relates to siloxane compositions having a VOC of about 19 g/l, a flash point above 140° F., and a vapor pressure of less than seven millimeters of mercury (7 mm Hg). The siloxane compositions consist essentially of unsubstituted and/or alkylated cyclicsiloxanes having 5 or 6 silicon atoms, an alkylated cyclicsiloxane having 3 or 4 silicon atoms, a linear alkylated siloxane fluid, at least one alkylene glycol alkylether and an alkylene glycol having at least six carbon atoms.
Claims19
A siloxane composition having a low VOC, a flash point above 140° F., and a vapor pressure of less than 7.00 millimeters of mercury (7 mm Hg) consisting essentially of:
- a) about 40 to 80 parts by weight of at least one alkylated cyclosiloxane having 5 or 6 silicon atoms;
- b) about 20 to 50 parts by weight of at least one alkylated cyclosiloxane having 3 or 4 silicon atoms;
- c) about 1.0 to 10 parts by weight of a linear alkylated siloxane having 3 to 8 silicon atoms;
- d) about 1.0 to 5.0 parts by weight of at least one alkylene glycol alkylether;
- and
- e) about 0.1 to 2.0 parts by weight of an alkylene glycol.
A siloxane composition having a low VOC, a flash point above 140° F., and a vapor pressure of less than 7.0 millimeters of mercury (7 mm Hg) consisting essentially of:
- a) about 60 to 70 parts by weight of an alkylated cyclosiloxane having 5 silicone atoms wherein the alkyl substituent of the siloxane has 10 carbon atoms;
- b) about 25 to 40 parts by weight of an alkylated cyclosiloxane having 4 silicon atoms wherein the alkyl substituent of the siloxane has 8 carbon atoms;
- c) about 4 to 8 parts by weight of a linear alkylated siloxane having 4 silicon atoms;
- d) about 1.0 to 3.0 parts by weight of at least one alkylene glycol alkylether wherein said alkyl substituents have from 1 to 4 carbon atoms;
- and
- e) from about 0.1 to 1.0 parts by weight of an alkylene glycol having at least 6 carbons.
A siloxane composition having a low VOC, a flash point above 140° F., and a vapor pressure of less than seven millimeters of mercury (7 mm Hg) consisting essentially of:
- a) about 53.4 parts by weight of an alkylated cyclosiloxane having 5 silicon atoms wherein the alkylated substituents of the siloxane has 10 carbon atoms;
- b) about 38 parts by weight of at least one alkylated cyclosiloxane having 4 silicon atoms wherein the alkylated substituents of the siloxane has 8 carbon atoms;
- c) about 5.7 parts by weight of a linear decamethyltetrasiloxane;
- d) about 2.5 parts by weight of dipropylene glycol butyl ether;
- and
- e) 0.4 parts by weight of hexyleneglycol.
Dependencies are inferred from the claim text.