The invention relates to a process for the manufacture of hybrid products comprising at least two different elastomer materials bonded to each other, said at least two different elastomer materials being based on at least one rubber of the ethylene propylene diene monomer (EPDM) type and at least one rubber of the silicone type wherein the silicone rubber comprises alkenyl functionalized polydialkylsiloxanes. The inventive process is particularly useful for the manufacture of EPDM-silicone hybrid sealing profiles.

A cushioning and impact absorbing pad with a surface layer of thickness t, and an elastomeric sub-surface-structure of height h. The sub-surface structure comprises an array of elastomeric columns wherein each column has a frustoconical column wall surrounding a central void. The frustoconical column walls have a zone that is a more compressible, relatively collapsible zone in a region at an end of the column opposite the surface layer and a zone that is a relatively less compressible zone in a region at the end of the column abutting the surface layer. Column walls are tapered with draft angles in the range of greater than 6 degrees and less than 10 degrees.

An elastomeric laminate is provided. The elastomeric laminate comprises a layer A consisting of a diene rubber composition, a layer B comprising a highly unsaturated diene elastomer B, n layers Ci arranged between the layer A and the layer B, n being an integer≧2, i being an integer ranging from 1 to n, the layer C1 being arranged between the layer A and the layer C2, the layer Cn being arranged between the layer B and the layer Cn−1, the layer Ci being arranged between the layer Ci−1 and the layer Ci+1 for values of i ranging from 2 to n−1 when n>2. Such a laminate has good resistance to separation of the layers which constitute it.

A silicone bond coat composition having a viscosity of less than 1,600 centistokes is applied to substantially all external surfaces of the article and then cured. A liquid silicone elastomer outer coat composition comprising a high viscosity first liquid silicone elastomer formulation and a low viscosity second liquid silicone elastomer formulation is then applied and cured to provide a protected article having a complex shape. Optimal coatings result from a careful balancing of component viscosities. In an embodiment, the first formulation has a viscosity greater than 300,000 centistokes, and the second formulation has a viscosity less than 6,000 centistokes, and the liquid silicone elastomer outer coat composition comprises from about 60 to about 40 percent by weight of the first formulation and from about 40 to about 60 percent by weight of the second liquid silicone elastomer formulation.

The invention relates to a pipe for conveying a fluid, in particular a coolant, for a vehicle, the pipe having a multi-layer structure and comprising: an inner layer defining an inner passage for fluid circulation, the inner layer being formed of a first material comprising an elastomer selected from the ethylene-propylene copolymers, an outer layer formed of a second material comprising: an elastomer selected from ethylene-vinyl acetate copolymers in a proportion of at least 50 phr, and a flame retardant according to a proportion of at least 50 phr, and an intermediate bonding layer arranged between the inner layer and the outer layer and comprising a mixture of an ethylene-propylene copolymer with an ethylene-vinyl acetate copolymer or a polyacrylate or an ethylene acrylate copolymer.

A roofing membrane comprising an olefinic rubber; and from about 20 to about 250 parts by weight of a silica filler per 100 parts by weight rubber; wherein the silica filler is chemically coupled to the olefinic rubber; and wherein the roofing membrane is non-black.

Reinforcing layers each have a cord angle set to 25° or greater and 45° or less when a body is in a neutral state. When the body is loaded with a specified internal pressure, intermediate rubber layers disposed between adjacent sets in which cords of the reinforcing layers extend in an intersecting direction are shear-deformed, the cord angle increases approximately to a stable angle of repose, and the expanded body maintains a predetermined shape. In each of the sets being formed of two reinforcing layers layered adjacently, the cords of the reinforcing layers extend in an identical direction at the predetermined cord angle. Since substantially no shear force acts on the intermediate rubber layers disposed between the reinforcing layers, the resistance when expanding the body decreases. This provides a pneumatic fender that expands more smoothly and ensures a predetermined shape when a body is loaded with a specified internal pressure.

An impact-resistant film comprises at least one layer of an elastomeric polymer material and an adhesive layer.

An elastomer laminate comprising three layers is provided. The first layer consists of a diene rubber composition comprising a first elastomer matrix. The second layer consists of a diene rubber composition comprising a second elastomer matrix, which second elastomer matrix comprises a second terpolymeric elastomer of ethylene, of an α-olefin and of a non-conjugated diene and contains more than 10% by weight of diene units. The third layer consists of a diene rubber composition comprising a third diene elastomer having a content by weight of diene units of greater than 50%. The second layer is arranged between the first layer and the third layer. Such a laminate has good resistance to separation of the layers which constitute it.

An elastomer laminate comprising three layers is provided. The first layer consists of a diene rubber composition comprising a first elastomer matrix, the second layer consists of a diene rubber composition comprising a second elastomer matrix, which second elastomer matrix comprises a second elastomer comprising ethylene units and diene units comprising a carbon-carbon double bond, which units are randomly distributed within the second elastomer, and the third layer consists of a diene rubber composition comprising a third diene elastomer having a content by weight of diene units of greater than 50% The second layer is arranged between the first layer and the third layer. Such a laminate has good resistance to separation of the layers which constitute it.