A cross-linking curing agent for improving the washing resistance of fabric three-proof finishing agent
A technology of three-proof finishing agent and cross-linking curing agent, which is applied in the preparation of organic compounds, organic chemistry, plant fibers, etc., can solve the problems of low electronegativity, low reactivity of BH and NCO groups, etc., and achieve improved durability The effect of washing
Active Publication Date: 2016-05-18
湖北美畅环保科技有限公司
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Problems solved by technology
[0006] The blocking agent is also a compound containing active hydrogen, but the activity of the hydrogen atom is small. Generally, in BH, B is an electron-withdrawing group with low electronegativity, so the reactivity of BH and NCO groups is also low.
Method used
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Experimental program
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Effect test
Embodiment 1
[0025] Bishydroxyfluoroalcohol (HO-R f -OH) After dehydration treatment, take 100 parts into the reactor, then add 30 parts of trifluoromethyl isophorone diisocyanate, 35 parts of toluene, react at 100~120℃ for 1~2h, then add 15 parts of methyl ethyl ketone The oxime was reacted at 100°C for 5h to prepare the crosslinking agent.
Embodiment 2
[0027] Bishydroxyfluoroalcohol (HO-R f -OH) After dehydration treatment, take 100 parts into the reactor, then add 30 parts of toluene diisocyanate and 35 parts of toluene, react at 100~120℃ for 1~2h, then add 15 parts of aziridine, react at 100℃ for 5h , The crosslinking agent was obtained.
Embodiment 3
[0029] Bishydroxyfluoroalcohol (HO-R f -OH) After dehydration treatment, take 100 parts into the reactor, then add 50 parts of hexamethylene diisocyanate, 35 parts of toluene, react at 100~120℃ for 1~2h, then add 15 parts of acetoxime, at 100℃ After reacting for 5 hours, the cross-linking agent was prepared.
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The invention discloses a preparation method and application of a crosslinked curing agent for improving the washing resistance of a three-proofing finishing agent of a fabric. The curing agent is a fluorine-containing polyurethane prepolymer and contains closed residual isocyanate and is stable at normal temperature; the curing agent can be stored for a long time after being added into soluble or water-based fluorocarbon resin; the curing agent can generate a crosslinking reaction within 30 seconds after being heated to 130 DEG C. The crosslinked curing agent is matched with a water-based single-component fabric three-proofing finishing agent prepared from perfluoroacrylate or fluorinated polyurethane; by adding 0.5 part of crosslinked curing agent, the washing resistance of the finishing agent can exceed 20 times. The crosslinked curing agent has the advantages that the crosslinked curing agent is a fluorine-containing polyurethane prepolymer and contains closed residual isocyanate; the crosslinked curing agent does not react with active groups such as -OH and -COOH at room temperature; the crosslinked curing agent can be decomposed at 110-130 DEG C to release active isocyanate groups so as to generate a crosslinking reaction; the crosslinked curing agent can be dispersed in water and is stable while the number of fluorine-containing carbon chains is less than or equal to 6, and the crosslinked curing agent belongs to an environment-friendly fluorine-containing compound.
Description
Technical field [0001] The invention relates to a preparation method and application of a crosslinking curing agent for improving the washing resistance of a fabric three-proof finishing agent. Background technique [0002] Fluorine-containing fabric three-proof finishing agent is an important finishing agent for textile finishing. The fabric finished with fluorine-containing fabric finishing agent can show the characteristics that ordinary hydrocarbon or silicone resin finishing agent can not reach, namely, oil repellent, Water and dirt repellency. When water droplets or oil are spilled on the fabric, they cannot penetrate into the fabric immediately, but will roll freely on the surface of the fabric as beads, forming good water and oil repellency. [0003] The key to the development of fluorine-containing fabric three-proof finishing agent lies in the development of fluorocarbon resin coating. As people's awareness of environmental protection has increased, the demand for the d...
Claims
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IPC IPC(8): C07C269/02C07D203/04D06M13/428D06M13/236D06M15/576D06M101/06
Inventor 程时远黄澄华金广泉陈雪娟叶旭
Owner 湖北美畅环保科技有限公司