A formed body including: a polytetrafluoroethylene or a modified polytetrafluoroethylene; and an unmodified polymerization inhibitor, the content of the unmodified polymerization inhibitor being 0.02 to 15 wt %.

Disclosed is a lip seal for water pump made of a rubber-like elastic material, fixed to a housing as a fixed side and in sliding contact with a shaft rotating relative to the housing; the lip seal having sliding surface with a surface roughness Ra (according to JIS B0601 corresponding to ISO 4287) of 1 to 30 m, being obtained by vulcanization-molding of a rubber composition comprising 100 parts by weight of the rubber-like elastic material, 1 to 150 parts by weight of a reinforcing filler, 5 to 90 parts by weight of a non-reinforcing filler having an average particle diameter of 1 m or more, 0.1 to 5 parts by weight of a coupling agent, 1 to 15 parts by weight of a co-crosslinking agent, and 0.5 to 10 parts by weight of an organic peroxide. The lip seal effects to prevent softening and volume swelling of the rubber-like elastic material and furthermore the generation of deposits in the rotating shaft, which are problematic for rotation torque and LLC resistance.

The present invention provides a seal comprising an elastomeric composite, said composite comprising an elastomeric polymer and a negative thermal expansion (NTE) filler, the NTE filler has a coefficient of thermal expansion (CTE) lower than ?6?10-6 K-1 within a temperature range of 220-293 K and is present in an amount of 0.01-50 volume % based on the total volume of the elastomeric composite at 20? C.

A putty composition comprising an organic binder, which further comprises a silicone fluid, an anti-blocking agent, and a rheological additive. The putty also contains a filler. The non-staining putty composition meets the ASTM-D2203 standard test method for staining sealants.

Provided are a surface-treated calcium carbonate filler useful in a curable resin, for imparting performance having excellent heat resistance, color fastness, strength and elongation, and a curable resin containing the filler.

A surface-treated calcium carbonate filler for a curable resin composition, in which calcium carbonate synthesized using compact limestone is treated by a surface treatment agent, the surface-treated calcium carbonate filler satisfying the following formulae (1) to (4):

0Mg2000,(1)

0Fe200,(2)

70SFa100, and(3)

0Ufa30,(4)

Mg: a proportion [ppm] of magnesium contained in surface-treated calcium carbonate, Fe: a proportion [ppm] of iron contained in surface-treated calcium carbonate, SFa: a proportion [wt %] of saturated fatty acid in the surface treatment agent comprising a water-soluble monovalent salt of a fatty acid, and UFa: a proportion [wt %] of unsaturated fatty acid in the surface treatment agent comprising a water-soluble monovalent salt of a fatty acid.

A putty composition comprising an organic binder, which further comprises a silicone fluid, an anti-blocking agent, and a rheological additive. The putty also contains a filler. The non-staining putty composition meets the ASTM-D2203 standard test method for staining sealants.

A formed body including: a polytetrafluoroethylene or a modified polytetrafluoroethylene; and an unmodified polymerization inhibitor, the content of the unmodified polymerization inhibitor being 0.02 to 15 wt %.

Provided is a flame-retardant rubber composition including an ethylene--olefin-non-conjugated diene copolymer, aluminum hydroxide, an alkyl-modified silane coupling agent, and a hydrocarbon-based plasticizer. An amount of the aluminum hydroxide is 60 mass % or more of the flame-retardant rubber composition, a total amount of the alkyl-modified silane coupling agent and the hydrocarbon-based plasticizer is 8 mass % or less of the flame-retardant rubber composition, and an amount of the alkyl-modified silane coupling agent is 5 mass % or more of the aluminum hydroxide. The flame-retardant rubber composition has excellent flame retardancy, physical properties suitable as a sealing material, and low environmental impact.

The present invention relates to composite sealing materials for a gasket. The gaskets are useful in solid oxide fuel/electrolyser cells (SOFC and SOEC). The fuel cell gaskets contain sealing material based upon chemically exfoliated vermiculite that has improved corrosion resistance. The sealing material comprises chemically exfoliated vermiculite; filler; and insoluble carbonate.

Receptacle closure made of metal, with a sealing insert that is arranged in the receptacle closure in such a way that it comes into contact with the mouth of the receptacle when the receptacle closure is positioned on the receptacle, wherein the sealing insert contains or is made from a sealing compound that includes at least 10% by weight, preferably at least 40% by weight LDPE relative to the total weight of the sealing compound, in particular with butene, hexene or octene as comonomer besides contents of LLDPE and/or OBC and a content of more than 2% by weight of at least one oxygen-absorbing compound, preferably sodium sulfite.