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US 2004/0071901 A1Published application
Method of making a material
AssigneeEastman Kodak Company
InventorsJulie Baker, Alan R. Pitt
Life of this patent
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Abstract
The invention provides a method of making a material comprising the steps of: coating a support with a solution comprising a polymer, a blowing agent and a surfactant. Either prior to or after the step of coating the support, the solution is interacted with to cause the blowing agent to generate bubbles within the solution causing foaming of the polymer. The surfactant is selected in dependence on whether or not it satisfies one or more predetermined criteria, to control the size of the bubbles.
Claims14
A method of making a material comprising the steps of:
- coating a support with a solution comprising a polymer, a blowing agent and a surfactant;
- and
- either prior to or after the step of coating said support, interacting with said solution to cause said blowing agent to generate bubbles within the solution causing foaming of the polymer, the surfactant being selected in dependence on whether or not it satisfies one or more predetermined criteria, to control the size of the bubbles.
Dependencies are inferred from the claim text.