Release agent composition and its use

Abstract

The present invention aims to provide a mold release agent composition that exhibits excellent release properties and can be uniformly applied, and a method for efficiently manufacturing polymer molded articles using this mold release agent composition. [Solution] A mold release agent composition comprising a silicone (A) and a nonionic surfactant (B) containing nitrogen atoms. Preferably, the surfactant (B) has oxyalkylene groups having 2 to 4 carbon atoms in its molecule, and preferably has an average of 1 to 20 such oxyalkylene groups. Preferably, the surfactant (B) has hydrocarbon groups having 7 to 24 carbon atoms in its molecule.

Claims

1. A mold release agent composition comprising silicone (A) and a nonionic surfactant (B) containing nitrogen atoms.

2. The mold release agent composition according to claim 1, wherein the surfactant (B) has an oxyalkylene group having 2 to 4 carbon atoms in its molecule, and the surfactant (B) has an average of 1 to 20 of the oxyalkylene groups.

3. The mold release agent composition according to claim 1 or 2, wherein the surfactant (B) has a hydrocarbon group having 7 to 24 carbon atoms in its molecule.

4. The mold release agent composition according to claim 1 or 2, wherein the surfactant (B) is at least one selected from the compound (B1) represented by the following general formula (1) and the compound (B2) represented by the following general formula (2). 【Chemistry 1】 (In the formula, R １ R is a monovalent hydrocarbon group having 7 to 24 carbon atoms. ２ and R ３ Each of these is independently a hydrogen atom or a monovalent hydrocarbon group having 1 to 12 carbon atoms, AO is an oxyalkylene group having 2 to 4 carbon atoms, and m and n represent the average number of moles of AO added, with m + n = 1 to 20. 【Chemistry 2】 (In the formula, R ４ R is a monovalent hydrocarbon group having 7 to 24 carbon atoms. ５ and R ６ Each of these is independently a hydrogen atom or a monovalent hydrocarbon group having 1 to 12 carbon atoms, AO is an oxyalkylene group having 2 to 4 carbon atoms, and p and q represent the average number of moles of AO added, with p + q = 1 to 20.

5. The mold release agent composition according to claim 1 or 2, wherein the silicone (A) comprises a silicone (A1) having a reactive functional group.

6. The mold release agent composition according to claim 5, wherein the reactive functional group is at least one selected from a group formed by the direct bonding of a silicon atom and a hydrogen atom, a hydroxyl group, an alkoxy group, a mercapto group, an amino group, a carboxyl group, and an epoxy group.

7. The mold release agent composition according to claim 1 or 2, wherein the amount of surfactant (B) is 20 to 80 parts by weight per 100 parts by weight of silicone (A).

8. The mold release agent composition according to claim 1 or 2, further comprising component (C), which is at least one selected from fatty acid esters, higher alcohols, fatty acids, and waxes.

9. A method for producing a polymer molded article comprising steps 1 and 2, Step 1 is a step of applying the release agent composition according to claim 1 or 2 to at least one location selected from the surface (i) of the raw material polymer, the surface (ii) of the fixed mold that comes into contact with the raw material polymer, and the surface (iii) of the movable mold that comes into contact with the raw material polymer. The method for manufacturing a polymer molded body, wherein step 2 is a step performed after step 1, in which raw material polymer is placed in the mold and molded while heating.

10. A method for producing a polymer molded article according to claim 9, wherein the raw material polymer is a raw material rubber, and the polymer molded article is a rubber molded article.

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