High temperature resistant compressible sheet material for gasketing and the like
AssigneeTexon LP
InventorsWarren J. Bodendorf, Thomas A. Podach
Life of this patent
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Abstract
A high temperature resistant compressible sheet material has a thickness of 0.001 to 1 inch and includes a crosslinked elastomer as a binder and high temperature staple fibers. A major amount of a particulate filler which has been chemically modified to coreact with the crosslinked elastomer is incorporated into the sheet material. The binder preferably has incorporated therein an addition polymerized silane coupling agent. The sheet material is fabricated according to papermaking techniques. The sheet material is useful in the fabrication of gasketing and in heat shields.
Claims23
A high temperature resistant compressible water laid sheet material having a fibrous constituent and a thickness of 0.001 to 1 inch comprising:
- (a) 8 to 65 percent by weight of a binder including a crosslinkable elastomer and a silane coupling agent copolymerized within said binder at a level of at least about 2 percent by weight;
- (b) a crosslinking agent for said elastomer;
- (c) 15 to 70 percent by weight of a inorganic particulate filler which has been chemically modified to coreact with the crosslinked elastomer;
- and
- (d) 15 to 50 percent by weight of high temperature nonasbestos staple fibers;
- said material capable of withstanding service temperatures of 500.degree. F. and being oil and water resistant.
A high temperature resistant compressible water laid sheet material having a thickness of 0.001 to 1 inch comprising:
- 20 to 30 percent by weight of inorganic nonasbestos staple fibers having a service temperature in excess of 1500.degree. F.;
- up to 8 percent by weight of inorganic staple fibers having a service temperature greater than 900.degree. F. but not in excess of 1500.degree. F.;
- 20to 30 percent by weight of a crosslinked elastomeric binder having a silane coupling agent polymerized therein at a level of at least about 2 percent by weight;
- and
- 40 to 50 percent by weight of an inorganic filler which has been modified to coreact with said elastomeric binder;
- said material capable of withstanding continuous service temperatures in excess of 500.degree. F. and being oil and water resistant.
Dependencies are inferred from the claim text.