Aqueous dispersion for treatment of fibers

A technology of fiber treatment and dispersion, applied in the direction of fiber treatment, carbon fiber, fiber type, etc., to achieve the effects of excellent adhesion, excellent softness, and excellent mechanical strength

Active Publication Date: 2011-11-23
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above publications include a heat treatment step, which sometimes limits the resin used

Method used

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  • Aqueous dispersion for treatment of fibers
  • Aqueous dispersion for treatment of fibers
  • Aqueous dispersion for treatment of fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0136] (1) Preparation of water dispersion

[0137] 91 parts by weight of propylene-butene-ethylene copolymer (A-1) (structural unit derived from propylene (hereinafter also referred to as "C3") = 66 mol %, weight average molecular weight ( hereinafter also referred to as "Mw") = 90,000, MI (melt index: 230° C.) (hereinafter also abbreviated as "MI") = 700), 9 parts by weight of maleic anhydride as a raw material of the propylene resin (B) A modified propylene / ethylene copolymer (C3 = 98 mol%, Mw = 25,000, acid content = 0.81 mmol) and 3 parts by weight of potassium oleate as a surfactant (C) were mixed. The above-mentioned mixture was put into a pressurized kneader, and melt-kneaded at 180° C. for 30 minutes. A 20% potassium hydroxide aqueous solution in an amount necessary to neutralize all the carboxylic acids was poured into the kneader, and kneaded for 30 minutes. This was taken out, poured into hot water, and fully stirred to obtain an aqueous dispersion. The obtained...

Embodiment 2

[0150] (1) Preparation of water dispersion

[0151] 91 parts by weight of propylene-butylene-ethylene copolymer (A-1) (C3=66 mol%, Mw=90,000, MI=700) as propylene-based resin (A), 9 parts by weight as propylene-based resin ( A maleic anhydride-modified propylene-ethylene copolymer (C3 = 98 mol%, Mw = 25,000, acid content = 0.81 mmol) and 3 parts by weight of potassium oleate as a surfactant (C) were mixed. . The above-mentioned mixture was supplied at a rate of 3,000 g / hour from the feed hopper of a twin-screw extruder (manufactured by Ikegai Iron Works Co., Ltd., PCM-30, L / D=40). A 20% aqueous solution of potassium hydroxide was continuously supplied at a rate of 90 g / hour from the supply port of the part, and extrusion was performed continuously at a heating temperature of 210°C. The extruded resin mixture was cooled to 110° C. in a jacketed static mixer installed at the same extruder port, and then poured into 80° C. hot water to obtain an aqueous dispersion. The yield o...

Embodiment 3

[0156] An aqueous dispersion was obtained in the same manner as in Example 2, except that a propylene-ethylene copolymer (C3=70 mol%, Mw=130,000, MI=80) was used as the propylene-based resin (A-1). The yield of the obtained aqueous dispersion was 99%, the solid content concentration was 45%, the pH was 12, and the average particle diameter was 0.4 μm (measured by a microtrac particle size analyzer).

[0157] Using the obtained aqueous dispersion, a test piece was prepared by the method described in (2) of Example 1, and evaluated by the method described in [1. Evaluation method of carbon fiber treated material]. The results are shown in Table 1.

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Abstract

Disclosed is an aqueous dispersion for treating fibers, which has excellent fiber sizing properties and can improve the adhesion between fibers and a matrix resin. Specifically disclosed is an aqueous dispersion for treating carbon fibers, which is characterized by comprising a specific first propylene resin (A), a specific second propylene resin (B), an anionic and / or nonionic surfactant (C) andwater (D) at a specified content ratio, wherein solid resin materials respectively derived from the components (A) and (B) are dispersed in water, the weight average molecular weight (Mw (a)) of the component (A) and the weight average molecular weight ((Mw) (b)) of the component (B) are different from each other, the Mw (a) is larger than the Mw (b), and the average particle diameter of the solid resin materials is 0.03 to 3 [mu]m.

Description

technical field [0001] The invention relates to a water dispersion for fiber treatment. In detail, the present invention relates to aqueous dispersions for treating fibers such as glass fibers, carbon fibers, alumina fibers, ceramic fibers or boron fibers, or for treating fibers such as polyolefin fibers, ABS fibers, nylon fibers, polyester fibers water dispersion. Background technique [0002] All along, after the fibers are melt spun, they are treated with a sizing agent to form fiber bundles. As commonly used sizing agents, emulsions such as starch aqueous solution, paraffin, and vegetable oil are used. In addition, when fibers are used for resin reinforcement, the fibers are treated with silane coupling agents, polyurethanes, epoxy resins, acrylic emulsions, etc. in order to improve the adhesion between the matrix resin and the fibers. [0003] However, especially when the matrix resin is polyolefin, the adhesion between the fibers treated with the above-mentioned emu...

Claims

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Application Information

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IPC IPC(8): D06M15/227C08L23/10C08L27/22D06M101/00D06M101/20D06M101/40
CPCC08J2323/10C08L23/142D01F11/14D06M15/263D06M15/227C08J3/05C08L23/10C08L2205/02D06M2101/40C08L2666/02C08L2666/06C08L27/22D06M2101/00
Inventor 浅见启一本间雅登土谷敦岐
Owner MITSUI CHEM INC
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