US 7,321,009 B2
Process for the production of vermiculite foil
John Robert Hoyes, Littleborough (United Kingdom); and Stephen Woolfenden, Rochdale (United Kingdom)
Assigned to Flexitallic Investments Incorporated, Houston, Tex. (US)
Appl. No. 10/482,656
PCT Filed Jul. 03, 2002, PCT No. PCT/GB02/03062
§ 371(c)(1), (2), (4) Date Jun. 16, 2004,
PCT Pub. No. WO03/004578, PCT Pub. Date Jan. 16, 2003.
Claims priority of application No. 0116441.7 (GB), filed on Jul. 05, 2001.
Prior Publication US 2004/0214032 A1, Oct. 28, 2004
Int. Cl. C08K 3/34 (2006.01)
U.S. Cl. 524—442  [524/444; 524/445; 524/448; 524/450] 21 Claims
 
1. A method of producing a sealing foil for gaskets comprising the steps of:
(a) the application of a wet sealing foil material to a forming sheet to form a layer;
(b) partially drying the said wet sealing foil layer on the forming sheet;
(c) removing the said layer from the forming sheet to form a core free gasket sealing foil; and
(d) forming, preferably cutting the layer into at least one suitable shape for use in the formation of a gasket; the sealing foil comprising a resilient material, the resilient material comprising a CEV component in a proportion of at least 25% w/w of the sealing foil, the said CEV component being at least partially derived from dry CEV.