Water-based non-skinning sealant and method of making the same
AssigneeTremco Cpg Inc.
InventorsLouis FERRI, Maneesh BAHADUR
Life of this patent
Estimating the term…
Abstract
A non-curing sealant comprises a mixture of (i) an aqueous emulsion comprising a modified butyl rubber and a plasticizer and (ii) at least one additive selected from the group consisting of a corrosion inhibitor, an anti-foamer, a stabilizer, an anti-microbial agent, a filler, a rheology modifier, and combinations thereof. The plasticizer is present in an amount (wt. % of solids) greater than or equal to an amount of butyl rubber in the non-curing sealant. The modified butyl rubber is modified by having a reduced molecular weight and, optionally, having a free-radically reactive silane, acrylic acid, acrylic ester, or maleic anhydride moiety grafted thereon.
Claims19
A non-curing sealant comprising a mixture of:
- an aqueous emulsion comprising a modified butyl rubber and a plasticizer, wherein the plasticizer is present in an amount (wt. % solids) greater than or equal to an amount (wt. % of solids) of butyl rubber in the non-curing sealant;
- and
- at least one additive selected from the group consisting of a corrosion inhibitor, an anti-foamer, a stabilizer, an anti-microbial agent, a filler, a rheology modifier, and combinations thereof.
A method of making a non-curing sealant comprising:
- preparing a modified butyl rubber;
- emulsifying the modified butyl rubber and a plasticizer in water, thereby forming an aqueous emulsion;
- and
- compounding the aqueous emulsion into the non-curing sealant by adding at least one additive to the aqueous emulsion, wherein the at least one additive is selected from the group consisting of a corrosion inhibitor, an anti-foamer, a stabilizer, an anti-microbial agent, a filler, a rheology modifier, and combinations thereof.
Dependencies are inferred from the claim text.