Abstract: There is provided a magnetic rubber composition comprising a rubber (A), a thermosetting resin (B) and a magnetic powder (C), wherein a mass ratio (A/B) of the rubber (A) to the thermosetting resin (B) is 0.2 to 5, and a mass ratio [C/(A+B)] of the magnetic powder (C) to the total mass of the rubber (A) and the thermosetting resin (B) is 0.5 to 20. It gives a magnetic rubber molded article excellent in flexibility and abrasion resistance, and a magnetic encoder produced therewith.

Abstract: There is provided a magnetic rubber composition comprising a rubber (A), a thermosetting resin (B) and a magnetic powder (C), wherein a mass ratio (A/B) of the rubber (A) to the thermosetting resin (B) is 0.2 to 5, and a mass ratio [C/(A+B)] of the magnetic powder (C) to the total mass of the rubber (A) and the thermosetting resin (B) is 0.5 to 20. It gives a magnetic rubber molded article excellent in flexibility and abrasion resistance, and a magnetic encoder produced therewith.

Abstract: There are provided a polyol curable fluororubber composition using a fluororubber of general use, a cured fluororubber formed article used as a grommet, a seal packing and the like for a gas sensor which can be used under high temperature circumstances using this, and a method of producing the same. A polyol curable fluororubber composition, which comprises 100 parts by weight of a fluororubber, 6 to 15 parts by weight of magnesium oxide, 0.5 to 5 parts by weight of a hydrotalcite group compound and 20 to 55 parts by weight of a mixture of thermal black and a bituminous coal filler. A cured fluororubber formed article which is produced by forming and curing the fluororubber composition in the presence of a polyol curing agent, and then subjecting the cured formed product to a stepwise temperature elevation treatment in a temperature range of 100° C. to 300° C.

Abstract: There are provided a polyol curable fluororubber composition using a fluororubber of general use, a cured fluororubber formed article used as a grommet, a seal packing and the like for a gas sensor which can be used under high temperature circumstances using this, and a method of producing the same. A polyol curable fluororubber composition, which comprises 100 parts by weight of a fluororubber, 6 to 15 parts by weight of magnesium oxide, 0.5 to 5 parts by weight of a hydrotalcite group compound and 20 to 55 parts by weight of a mixture of thermal black and a bituminous coal filler. A cured fluororubber formed article which is produced by forming and curing the fluororubber composition in the presence of a polyol curing agent, and then subjecting the cured formed product to a stepwise temperature elevation treatment in a temperature range of 100° C. to 300° C.

Abstract: There are provided a polyol curable fluororubber composition using a fluororubber of general use, a cured fluororubber formed article used as a grommet, a seal packing and the like for a gas sensor which can be used under high temperature circumstances using this, and a method of producing the same. A polyol curable fluororubber composition, which comprises 100 parts by weight of a fluororubber, 6 to 15 parts by weight of magnesium oxide, 0.5 to 5 parts by weight of a hydrotalcite group compound and 20 to 55 parts by weight of a mixture of thermal black and a bituminous coal filler. A cured fluororubber formed article which is produced by forming and curing the fluororubber composition in the presence of a polyol curing agent, and then subjecting the cured formed product to a stepwise temperature elevation treatment in a temperature range of 100° C. to 300° C.

Abstract: There are provided a polyol curable fluororubber composition using a fluororubber of general use, a cured fluororubber formed article used as a grommet, a seal packing and the like for a gas sensor which can be used under high temperature circumstances using this, and a method of producing the same. A polyol curable fluororubber composition, which comprises 100 parts by weight of a fluororubber, 6 to 15 parts by weight of magnesium oxide, 0.5 to 5 parts by weight of a hydrotalcite group compound and 20 to 55 parts by weight of a mixture of thermal black and a bituminous coal filler. A cured fluororubber formed article which is produced by forming and curing the fluororubber composition in the presence of a polyol curing agent, and then subjecting the cured formed product to a stepwise temperature elevation treatment in a temperature range of 100° C. to 300° C.

Abstract: There are provided a polyol curable fluororubber composition using a fluororubber of general use, a cured fluororubber formed article used as a grommet, a seal packing and the like for a gas sensor which can be used under high temperature circumstances using this, and a method of producing the same. A polyol curable fluororubber composition, which comprises 100 parts by weight of a fluororubber, 6 to 15 parts by weight of magnesium oxide, 0.5 to 5 parts by weight of a hydrotalcite group compound and 20 to 55 parts by weight of a mixture of thermal black and a bituminous coal filler. A cured fluororubber formed article which is produced by forming and curing the fluororubber composition in the presence of a polyol curing agent, and then subjecting the cured formed product to a stepwise temperature elevation treatment in a temperature range of 100° C. to 300° C.