Cylinder head gasket
AssigneeElring Dichtungswerke GmbH
InventorsRudolf Bindel, Eugen Ruoff
Life of this patent
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Abstract
A cylinder head gasket having at least one plate of soft material and at least one combustion chamber opening, said soft material including predominantly inorganic fibers and/or filling materials connected by binding means and including free OH groups, the soft material is mixed with a first impregnating material comprising a polysiloxane containing reactive hydrogen groups for reaction with the free OH groups of the fibers or filling materials and a second impregnating material which consists of a second polysiloxane of a higher degree of polymerization than the first polysiloxane and which polymerizes with itself as well as with the reactive hydrogen groups of the first polysiloxane, said second polysiloxane forming a stable siloxane structure having more branches than the first polysiloxane.
Claims20
A cylinder head gasket having at least one plate of soft material and at least one combustion chamber opening:
- said plate of soft material consisting predominantly of inorganic fibers connected by binding means and including free OH groups, wherein part of the fibers or filling materials extend up to the surface of the plate of soft material, said plate of soft material being mixed with polymer impregnation means;
- said polymer impregnation means including a first impregnating material application of a first polysiloxane containing reactive hydrogen groups for reaction with the free OH groups of the fibers and filling materials and a second impregnating material application of a second polysiloxane of a higher degree of polymerization which polymerizes with itself as well as with the reactive hydrogen groups of the polysiloxane of the first impregnating material, the second polysiloxane forming a stable siloxane structure having mre branches than the first polysiloxane.
Dependencies are inferred from the claim text.