Heat-resistant silane crosslinked resin molded body and method of producing the same, heat-resistant silane crosslinkable resin composition and method of producing the same, silane master batch, and heat-resistant product using heat-resistant silane crosslinked resin molded body

1. A method of producing a heat-resistant silane crosslinked resin molded body, comprising:

(a) a step of obtaining a mixture by melt-mixing, to 100 parts by mass of a base resin (R B ) containing a non-aromatic organic oil of from 5 to 40 mass %, an organic peroxide of from 0.01 to 0.6 parts by mass, an inorganic filler of from 10 to 400 parts by mass, a silane coupling agent of from more than 4 parts by mass to 15.0 parts by mass, and a silanol condensation catalyst,

(b) a step of obtaining a molded body by molding the mixture, and

(c) a step of obtaining a heat-resistant silane crosslinked resin molded body by contacting the molded body with water,

wherein the step (a) has a step (1) and a step (3) below, and when part of the base resin (R B ) is melt-mixed in the step (1), the step (a) has the step (1), a step (2), and the step (3) below:

Step (1): a step of melt-mixing all or part of the base resin (R B ), the organic peroxide, the inorganic filler, and the silane coupling agent, at a temperature equal to or higher than the decomposition temperature of the organic peroxide, to prepare a silane master batch,

Step (2): a step of melt-mixing a remainder of the base resin (R B ) and the silanol condensation catalyst, to prepare a catalyst master batch, and

Step (3): a step of mixing the silane master batch and either the silanol condensation catalyst or the catalyst master batch, and

wherein the base resin (R B ) contains an ethylene-propylene-unconjugated diene rubber.

2. The method of producing a heat-resistant silane crosslinked resin molded body according to claim 1 , wherein the base resin (R B ) contains 5 to 40 mass % of a styrene-based elastomer, and a mass ratio of the content of the non-aromatic organic oil to the content of the styrene-based elastomer is from 1:5 to 2:1.

3. A heat-resistant silane crosslinked resin molded body produced by the method according to claim 1 .

4. A heat-resistant product having the heat-resistant silane crosslinked resin molded body according to claim 3 .

5. The heat-resistant product according to claim 4 , wherein the heat-resistant silane crosslinked resin molded body is provided as a coating for an electric wire or an optical fiber cable.

6. A method of producing a heat-resistant silane crosslinkable resin composition, comprising:

(a) a step of obtaining a mixture by melt-mixing, to 100 parts by mass of a base resin (R B ) containing a non-aromatic organic oil of from 5 to 40 mass %, an organic peroxide of from 0.01 to 0.6 parts by mass, an inorganic filler of from 10 to 400 parts by mass, a silane coupling agent of from more than 4 parts by mass to 15.0 parts by mass, and a silanol condensation catalyst,

wherein the step (a) has a step (1) and a step (3) below, and when part of the base resin (R B ) is melt-mixed in the step (1), the step (a) has the step (1), a step (2), and the step (3) below:

Step (1): a step of melt-mixing all or part of the base resin (R B ), the organic peroxide, the inorganic filler, and the silane coupling agent, at a temperature equal to or higher than the decomposition temperature of the organic peroxide, to prepare a silane master batch,

Step (2); a step of melt-mixing a remainder of the base resin (R B ) and the silanol condensation catalyst, to prepare a catalyst master batch, and

Step (3): a step of mixing the silane master batch and either the silanol condensation catalyst or the catalyst master batch, and

wherein the base resin (R B ) contains an ethylene-propylene-unconjugated diene rubber.

7. The method of producing a heat-resistant silane crosslinkable resin composition according to claim 6 , wherein the amount of the silanol condensation catalyst is from 0.05 to 0.5 parts by mass, with respect to 100 parts by mass of the base resin (R B ).

8. A heat-resistant silane crosslinkable resin composition produced by the method according to claim 6 .

9. A silane master batch, for use in a production of a heat-resistant silane crosslinkable resin composition formed by melt-mixing, to 100 parts by mass of a base resin (R B ) containing a non-aromatic organic oil of from 5 to 40 mass %, an organic peroxide of from 0.01 to 0.6 parts by mass, an inorganic filler of from 10 to 400 parts by mass, a silane coupling agent of from more than 4 parts by mass to 15.0 parts by mass, and a silanol condensation catalyst,

wherein all or part of the base resin (R B ), the organic peroxide, the inorganic filler, and the silane coupling agent are melt-mixed, at a temperature equal to or higher than the decomposition temperature of the organic peroxide, and

wherein the base resin (R B ) contains an ethylene-propylene-unconjugated diene rubber.