Back to results
US 8,568,850 B2Granted
Frozen, lightweight curable sealant
Assignee3M Innovative Properties Company
InventorsJonathan Zook, Dewey L. Mullins, Stephane Pyrek, David W. Jordan
Life of this patent
Estimating the term…
Abstract
A uniformly premixed sealant is extruded into a packaging form and allowed to pressure equilibrate prior to freezing. Upon warming the sealant begins to cure. The storage of the preformed sealant formulation under cold conditions arrests the activity of cure catalysts and accelerators mixed therethrough. The sealant is readily extruded into a preform shape containing a lightweight filler. A release film is provided to avoid contact with the sealant preformed in a shape during application to a substrate.
Claims10
A process for preparing a premixed frozen sealant comprising:
- mixing sealant components comprising a curable prepolymer and a curing agent to form a premix curable to a polymer;
- extruding said premix into a packaging form;
- allowing a time of at least two minutes for said premix to undergo pressure equilibration;
- and
- freezing said premix.
2 more elements
Dependencies are inferred from the claim text.