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AssigneeDaikin Industries, Ltd.
InventorsKazuyoshi Kawasaki, Tsuyoshi Itagaki, Katsuhiko Iseki, Takafumi Yamato, Tsuyoshi Noguchi
Estimating the term…
A crosslinkable elastomer composition which provides a crosslinked product with improved mechanical strength and heat resistance, comprising, (A) a compound having at least two crosslinkable groups represented by the formula (I): 1 and (B) an elastomer which contains a crosslinking site capable of reacting with the crosslinkable group (I) is prepared.
A crosslinkable elastomer composition comprising,
A crosslinking agent comprising,
A compound represented by the formula (IV):
Dependencies are inferred from the claim text.
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Amines; Quaternary ammonium compounds: with aromatically bound amino groups
Having amino groups bound to two or three six-membered aromatic rings: the carbon skeleton being further substituted by halogen atoms or by nitro…
Use of inorganic or non-macromolecular organic substances as compounding ingredients
Acyclic or carbocyclic compounds
Term end not estimated
The present invention relates to a crosslinkable elastomer composition, particularly a flourine-containing crosslinkable elastomer composition which can provide a molded article of a crosslinked rubber with superior sealing property, mechanical strength and heat resistance at a high temperature.
Because flourine-containing elastomer, especially perfluoro elasotmer which is composed mainly of tetrafluoroethylene (TFE) units, demonstrates excellent chemical resistance, solvent resistance and heat resistance, it is widely used as a sealing material and the like under harsh circumstances.
However, the characteristics in demand have become more severe as technology advances, and in the fields of aerospace, semiconductor manufacturing devices and chemical plant, sealing property under high temperature circumstances of at least 300° C. is desired.
FIG. 1 is a chart of the infrared spectroscopic analysis of the fluorine-containing elastomer having a CN group, obtained in Preparation Example 1.
The crosslinking system made when the crosslinkable elastomer composition of the present invention is crosslinked is similar to an imidazole crosslinking system. A conventional imidazole crosslinking forms a crosslinking structure, for example, such as 8
On the other hand, in the present invention, as shown in 9
it is presumed that the benzimidazole ring formation without a H—N bond contributes greatly to the improvement of heat resistance. Consequently, compound (A), which functions as a crosslinking agent, is an important factor of the present invention. The following is a description of compound (A).