Stable, foamed caulk and sealant compounds and methods of use thereof
AssigneeDAP Products Inc.
InventorsPatrick J. Lucas, Anthony J. Taylor
Life of this patent
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Abstract
Stable foam caulk, sealant and insulation compositions are disclosed. The compositions comprise solid, waxy non-ionic lipophilic surfactants having low HLB values. These surfactants, upon foamed dispensing of the composition, provide stable support for bubbles formed from drying of a latex emulsion of a film forming polymer and a volatile liquid hydrocarbon propellant. In addition to use in caulking, sealant or insulation methods, the composition can be used to form artificial terrains and other hardenable structural surfaces as backgrounds or support means for hobbies, crafts, and the like.
Claims28
Foamable caulk or insulating composition adapted for storage in a pressurized aerosol container having a valve associated therewith for dispensing the contents of said container in the form of a stable foam, said composition comprising
- (a) an aqueous emulsion comprising a film forming polymer
- (b) a liquid propellant;
- and
- (c) a solid, lipophilic non-ionic surfactant having an HLB value of about 3-8, said composition exhibiting a volumetric expansion about 18-24 hours after said dispensing of about 0.45 and greater.
Foamable caulk or insulating composition for storage under pressure inside a dispenser, said dispenser adapted for release of a foamed bead or strand of said caulk or insulating composition, said composition comprising
- (a) an aqueous emulsion comprising a film forming polymer
- (b) a solid, water insoluble lipophilic surfactant having an HLB value of about 3-about 8;
- and
- (c) a liquid propellant wherein said water insoluble lipophilic surfactant is present in an amount of about 1-10 wt % based upon the total weight of (a) and (b), said composition, after foamed release from said dispenser, exhibiting a percentage volumetric expansion about 18-24 hours after said release, of about 0.6 and greater.
Method of filling joints, cracks or spaces existing between adjacent structural units comprising applying to said joint, crack or space a sufficient filling amount of a foamable composition comprising:
- (a) an aqueous emulsion comprising a film forming polymer
- (b) a liquid propellant;
- and
- (c) a solid, lipophilic non-ionic surfactant having an HLB value of about 3-8, said composition exhibiting a volumetric expansion about 18-24 hours after said dispensing of about 0.45 and greater.
Dependencies are inferred from the claim text.