C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
18/1021, 154/105
C04B 41/48 (2006.01) B29C 37/00 (2006.01) B29C 63/02 (2006.01) B32B 19/02 (2006.01) B32B 25/04 (2006.01)
Patent
CA 1258615
ABSTRACT OF THE DISCLOSURE A process is provided herein for coating a preformed, porous base material comprising a mineral fibrous or particulate material or an organic fibrous or particulate material or mixtures thereof. The process comprises applying, at atmospheric pressure, a coating of a vulcanizable elastomeric material in unvulcanized form to a porous surface of such preformed, porous base material. The elastomeric material is permanently adhered to the preformed porous base material by a hot press, hot vulcanizable step. In this way the elastomeric material is substantially simultaneously both adhered securely to one outer surface of the base material and is penetrated into and is impregnated below and into the same surface of the base material to be within the porous structure of the base material, and is vulcanized therein in situ at a high pressure of 50 to 500 Newton/cm2 and a temperature of 120°C. - 300°C.
477622
Hering Reinhard F.
Mcfadden Fincham
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