Heat-resistant crosslinked resin formed body and method for producing the same, silane master batch, master batch mixture and formed body thereof, and heat-resistant product

1. A method for producing a heat-resistant crosslinked resin formed body, comprising:

(a) melt-kneading 0.003 to 0.3 part by mass of an organic peroxide, 0.5 to 400 parts by mass of an inorganic filler, and more than 2 parts by mass and 15.0 parts by mass or less of a silane coupling agent, with respect to 100 parts by mass of a resin containing a halogen-containing resin, at a temperature equal to or higher than a decomposition temperature of the organic peroxide, to prepare a silane master batch;

(b) mixing the silane master batch obtained in the step (a) with a silanol condensation catalyst, and then forming the resultant mixture; and

(c) bringing the formed body obtained in the step (b) into contact with moisture, to cause crosslinking.

2. The method for producing the heat-resistant crosslinked resin formed body described in claim 1 , wherein a content of the organic peroxide is 0.005 to 0.1 part by mass.

3. The method for producing the heat-resistant crosslinked resin formed body described in claim 1 , wherein a content of the silane coupling agent is 3 to 12.0 parts by mass.

4. The method for producing the heat-resistant crosslinked resin formed body described claim 1 , wherein a content of the silane coupling agent is 4 to 12.0 parts by mass.

5. The method for producing the heat-resistant crosslinked resin formed body described in claim 1 , wherein the silane coupling agent is vinyltrimethoxysilane or vinyltriethoxysilane.

6. The method for producing the heat-resistant crosslinked resin formed body described in claim 1 , wherein the inorganic filler is silica, aluminum hydroxide, magnesium hydroxide, calcium carbonate or antimony trioxide, or any combination of these.

7. The method for producing the heat-resistant crosslinked resin formed body described in claim 1 , wherein melt-kneading in the step (a) is performed by using an enclosed mixer.

8. A silane master batch for use in producing a master batch mixture prepared by mixing 0.003 to 0.3 part by mass of an organic peroxide, 0.5 to 400 parts by mass of an inorganic filler, and more than 2 parts by mass and 15.0 parts by mass or less of a silane coupling agent, with respect to 100 parts by mass of a resin containing a halogen-containing resin, and a silanol condensation catalyst,

wherein the silane master batch is obtained by melt-kneading all or part of the resin; the organic peroxide, the inorganic filler and the silane coupling agent, at a temperature equal to or higher than a decomposition temperature of the organic peroxide.

9. A master batch mixture, comprising the silane master batch described in claim 8 and a silanol condensation catalyst.

10. A formed body, formed by introducing the master batch mixture obtained by dry-blending the silane master batch described in claim 8 and a silanol condensation catalyst, into a forming machine.

11. A heat-resistant crosslinked resin formed body, produced according to the method for producing the heat-resistant crosslinked resin formed body described in claim 1 .

12. The heat-resistant crosslinked resin formed body described in claim 11 , formed by crosslinking the halogen-containing resin with the inorganic filler through a silanol bond.

13. A heat-resistant product, comprising the heat-resistant crosslinked resin formed body described in claim 11 .

14. The heat-resistant product described in claim 13 , wherein the heat-resistant crosslinked resin formed body is a coating of an electric wire or an optical fiber cable.