Oil agent composition for acrylic precursor fibers for carbon fibers, acrylic precursor fiber bundle for carbon fibers, and method for producing the same
View Patent ↗An object of the present invention is to provide an oil agent composition which can improve the reduction in operability occurring when an oil agent composition containing a silicone compound is used as the main component and the reduction in the physical properties of the carbon fiber bundle occurring when a non-silicone-based oil agent composition is used. The oil agent composition for acrylic precursor fibers for carbon fibers of the present invention contains 1 to 10 wt % of a modified polydimethylsiloxane including a unit having a specific alkyl chain, at least one unit selected from the group consisting of a unit having a specific polyethylene oxide chain, a unit having a specific polyglycerin chain, and a unit having a specific polyether chain, and optionally a unit having a specific polydimethylsiloxyalkyl chain.
1. A composition comprising 1 to 10 wt % of a modified polydimethylsiloxane, 30 to 70 wt % of an aromatic ester, 10 to 50 wt % of an amino-modified silicone, and 10 to 40 wt % of a nonionic emulsifier, wherein said modified polydimethylsiloxane comprises:
units represented by each of the formulas (1), (3) and (5) below in an amount of 1 to 20 and has a kinematic viscosity at 25° C. of 3000 to 5000 mm 2 /s; or
units represented by each of the formulas (1) and (4) below in an amount of 1 to 20 and has a kinematic viscosity at 25° C. of 500 to 1500 mm 2 /s:
wherein x is 7 to 15,
wherein mb is 0 to 3; and yb is 1 to 5,
wherein yc +yd is 5 to 15; ethylene oxide and propylene oxide each is a block copolymer or a random copolymer; and mc is 0 to 3,
wherein n is 1 to 5; and z is 3 to 60.
2. The composition according to claim 1 , wherein the modified polydimethylsiloxane comprises units represented by each of the formulas (1), (3) and (5) in an amount of 1 to 20 and has a kinematic viscosity at 25° C. of 3000 to 5000 mm 2 /s.
3. The composition according to claim 2 , comprising 3 to 5 wt % of said modified polydimethylsiloxane, 30 to 40 wt % of said aromatic ester, 30 to 40 wt % of said amino-modified silicone, and 10 to 20 wt % of said nonionic emulsifier.
4. An acrylic precursor fiber bundle having, thereon, the composition according to claim 3 in an amount of 0.1 to 2.0 wt % based on the mass of dry fiber.
5. The composition according to claim 1 , wherein the modified polydimethylsiloxane comprises units represented by each of the formulas (1) and (4) in an amount of 1 to 20 and has a kinematic viscosity at 25° C. of 500 to 1500 mm2/s.
6. The composition according to claim 5 , comprising 3 to 5 wt % of said modified polydimethylsiloxane, 30 to 40 wt % of said aromatic ester, 30 to 40 wt % of said amino-modified silicone, and 10 to 20 wt % of said nonionic emulsifier.
7. An acrylic precursor fiber bundle having, thereon, the composition according to claim 6 in an amount of 0.1 to 2.0 wt % based on the mass of dry fiber.
8. The composition according to claim 1 , comprising 30 to 40 wt % of an aromatic ester and 30 to 40 wt % of an amino-modified silicone.
9. The composition according to claim 1 , comprising 10 to 20 wt % of a nonionic emulsifier.
10. An oil agent prepared by dispersing the composition according to claim 1 in water.
11. An acrylic precursor fiber bundle having, thereon, an oil agent according to claim 10 in an amount of 0.1 to 2.0 wt % based on the mass of dry fiber.
12. An acrylic precursor fiber bundle having, thereon, the composition according to claim 1 in an amount of 0.1 to 2.0 wt % based on the mass of dry fiber.
13. The composition according to clam 1, wherein said composition is located on an acrylic precursor fiber.
14. The composition according to claim 1 , comprising 3 to 5 wt % of said modified polydimethylsiloxane, 30 to 40 wt % of said aromatic ester, 30 to 40 wt % of said amino-modified silicone, and 10 to 20 wt % of said nonionic emulsifier.
15. An acrylic precursor fiber bundle having, thereon, the composition according to claim 14 in an amount of 0.1 to 2.0 wt % based on the mass of dry fiber.
16. A composition comprising 1 to 10 wt % of a modified polydimethylsiloxane, 30 to 70 wt % of an aromatic ester, 10 to 50 wt % of an amino-modified silicone, and 10 to 40 wt % of a nonionic emulsifier, wherein the modified polydimethylsiloxane comprises units represented by each of formulas (1), (2) and (5) below in an amount of one or more and has a kinematic viscosity at 25° C. of 500 to 1000 mm 2 /s:
wherein x is 7 to 15,
wherein ma is 0; and ya is 1 to 15,
wherein n is 1 to 5; and z is 3 to 60.
17. The composition according to claim 16 , comprising 3 to 5 wt % of said modified polydimethylsiloxane, 30 to 40 wt % of said aromatic ester, 30 to 40 wt % of said amino-modified silicone, and 10 to 20 wt % of said nonionic emulsifier.
18. An acrylic precursor fiber bundle having, thereon, the composition according to claim 17 in an amount of 0.1 to 2.0 wt % based on the mass of dry fiber.