Production process for silicone polymer
AssigneeToray Fine Chemicals Co., Ltd.
InventorsMasayuki Mizuta, Hiroyasu Seki, Hisatake Kobayashi, Hidetoshi Kato
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Abstract
A process of producing a silicone polymer includes hydrolyzing/condensating one or more compound in the presence of a base, thereby producing a silicone polymer that has an organic acid content of 0.0001 to 0.03 parts by weight with respect to 100 parts by weight of the silicone polymer. The process for producing a silicone polymer makes it possible to inhibit an increase in the molecular weight of a silicone polymer during high-temperature concentration in the steps of producing a silicone polymer.
Claims16
A process of producing a silicone polymer comprising:
- hydrolyzing/condensating one or more compound(s) in the presence of a base,
- a first acid addition step of adding an acid for neutralization,
- adding water followed by separation,
- subsequent to separation, a second acid addition step of further adding an organic acid,
- adjusting the organic acid content of 0.0001 to 0.03 parts by weight with respect to 100 parts by weight of the compound(s), and
- concentrating the silicone polymer from a solution containing the organic acid and the compound(s),
- wherein the compound(s) is selected from the group consisting of:
- a compound represented by Formula (1):
- R1R2Si(OR3)2 (1)
- where R1 and R2 each represent a hydrocarbon group, a glycidyl group, or a methacryloyl group, R1 and R2 may be the same or different, and R3 represents a hydrocarbon group;
- a compound represented by Formula (2):
- R4Si(OR5)3 (2)
- where R4 represents a hydrocarbon group, a glycidyl group, or a methacryloyl group, and R5 represents a hydrocarbon group;
- and
- a compound represented by Formula (3):
- Si(OR6)4 (3)
- where R6 represents a hydrocarbon group.
A process of producing a silicone polymer comprising:
- hydrolyzing/condensating one or more compound(s) in the presence of a base,
- adding an acid for neutralization,
- adding water followed by separation,
- further adding a divalent or higher valent organic acid,
- adjusting the organic acid content of 0.0001 to 0.03 parts by weight with respect to 100 parts by weight of the compound(s), and
- concentrating the silicone polymer from a solution containing the organic acid and the compound(s),
- wherein the compound(s) is selected from the group consisting of:
- a compound represented by Formula (1):
- R1R2Si(OR3)2 (1)
- where R1 and R2 each represent a hydrocarbon group, a glycidyl group, or a methacryloyl group, R1 and R2 may be the same or different, and R3 represents a hydrocarbon group;
- a compound represented by Formula (2):
- R4Si(OR5)3 (2)
- where R4 represents a hydrocarbon group, a glycidyl group, or a methacryloyl group, and R5 represents a hydrocarbon group;
- and
- a compound represented by Formula (3):
- Si(OR6)4 (3)
- where R6 represents a hydrocarbon group.
A process of producing a silicone polymer comprising:
- hydrolyzing/condensating one or more compound(s) in the presence of a base,
- adding an acid for neutralization,
- adding water followed by separation,
- further adding at least one of oxalic acid, maleic acid, malonic acid, phthalic acid, fumaric acid or citric acid as an organic acid,
- adjusting the organic acid content of 0.0001 to 0.03 parts by weight with respect to 100 parts by weight of the compound(s), and
- concentrating the silicone polymer from a solution containing the organic acid and the compound(s),
- wherein the compound(s) is selected from the group consisting of:
- a compound represented by Formula (1):
- R1R2Si(OR3)2 (1)
- where R1 and R2 each represent a hydrocarbon group, a glycidyl group, or a methacryloyl group, R1 and R2 may be the same or different, and R3 represents a hydrocarbon group;
- a compound represented by Formula (2):
- R4Si(OR5)3 (2)
- where R4 represents a hydrocarbon group, a glycidyl group, or a methacryloyl group, and R5 represents a hydrocarbon group;
- and
- a compound represented by Formula (3):
- Si(OR6)4 (3)
- where R6 represents a hydrocarbon group.
Dependencies are inferred from the claim text.