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Modified waterborne polyurethane and preparation method thereof and application of modified waterborne polyurethane serving as wet rubbing fastness improver

A water-based polyurethane, modified technology, used in textiles and papermaking, fiber processing, plant fibers, etc., can solve the problem of limited improvement in wet rubbing fastness, achieve good compactness and continuity, increase color yield, and film formation. high intensity effect

Active Publication Date: 2016-04-20
SHANGHAI ARGUS NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, Chinese patent CN102432801A discloses a durable wet rubbing fastness improving agent and its preparation method. The invention actually produces cationic reactive water-based polyurethane, which is baked at high temperature to form a polymer network film on the surface of the fabric to improve Wet rubbing fastness, but the disadvantage is that when used alone, the improvement of wet rubbing fastness is limited, and softeners need to be added to assist

Method used

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  • Modified waterborne polyurethane and preparation method thereof and application of modified waterborne polyurethane serving as wet rubbing fastness improver
  • Modified waterborne polyurethane and preparation method thereof and application of modified waterborne polyurethane serving as wet rubbing fastness improver
  • Modified waterborne polyurethane and preparation method thereof and application of modified waterborne polyurethane serving as wet rubbing fastness improver

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preparation example Construction

[0041] In a preferred embodiment, the present invention provides a kind of preparation method of above-mentioned modified waterborne polyurethane, it comprises the steps:

[0042] 1) Add (meth)acrylic acid C to the water-based polyurethane prepolymer containing -NCO groups at a temperature of 50-60°C 2－3 Hydroxyalkyl Ester, C 1-6 Alkyl alcohol, reacts under the condition that catalyst exists, forms the waterborne polyurethane prepolymer of the double bond single end capping of formula IV representation:

[0043]

[0044] In Formula IV, R 1 for H or CH 3 , n is 2 or 3, k is an integer of 1-5, and PU is a waterborne polyurethane prepolymer residue;

[0045] 2) Add the (meth)acrylate represented by formula V and the perfluoroalkyl (meth)acrylate represented by formula VI to the reaction mixture formed in step 1), stir and swell at a temperature of 60-80°C :

[0046]

[0047] In formula V or VI:

[0048] R 1 for H or CH 3 ;

[0049] R 2 for C 12-20 alkyl;

[0050...

Embodiment 1

[0071] Add water-based polyurethane prepolymer EC-605 (purchased from Shanghai Sisheng Polymer Material Co., Ltd., weight average molecular weight 2100) 100g (0.0476mol) in the four-necked flask equipped with stirrer, thermometer, and reflux condenser, and heat up to At 55°C, add 5.5g (0.0476mol) hydroxyethyl acrylate, 3.9g (0.0524mol) n-butanol, add 0.1% dibutyltin dilaurate, keep warm for 1.5h, and then add 20g (0.0832mol) dodecyl acrylate Alkyl ester, 5g (0.0298mol) 2,2,2-trifluoroethyl methacrylate, 5% N-methylpyrrolidone, stir to make it swell, heat up to 80°C, drop 1% 2 within 2-3h, 2′-Azo(2-methylpropylamidine) dihydrochloride, heat preservation for 3h, to obtain modified water-based polyurethane 1, set aside. The weight average molecular weight of the modified waterborne polyurethane 1 is 67000.

Embodiment 2

[0073] Add water-based polyurethane prepolymer EC-600 (Shanghai Sisheng Polymer Material Co., Ltd., weight average molecular weight 1600) 100g (0.0625mol) into a four-necked flask equipped with a stirrer, a thermometer, and a reflux condenser, and heat up to 58°C , add 7.3g (0.0625mol) hydroxyethyl acrylate, 5.1g (0.0688mol) n-butanol at the same time, add 0.1% dibutyltin dilaurate, keep warm for 2h, then add 12g octadecyl acrylate (0.0370mol), 3g (0.0072mol) perfluorohexyl ethyl acrylate, 6% N-methylpyrrolidone, stir to make it swell, heat up to 85°C, drop 1% 2,2′-azo(2-methylpyrrolidone) within 2-3h Propylamidine) dihydrochloride, heat preservation 4h, get modified waterborne polyurethane 2, stand-by. The weight average molecular weight of the modified waterborne polyurethane 2 is 79000.

[0074] The application effect of each embodiment is compared with the commercially available wet rubbing fastness enhancer: Shanghai Sisheng Polymer Material Co., Ltd. waterborne polyuret...

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Abstract

The invention discloses modified waterborne polyurethane containing copolymerization units expressed in an x mol formula (I), a y mol formula (II) and a z mol formula (III) and a preparation method thereof and application of the modified waterborne polyurethane serving as a wet rubbing fastness improver. The prepared modified waterborne polyurethane wet rubbing fastness improver is high in film formation strength and good in compactness and continuity and has no preference on dye and fabrics in fabric finishing, the finished fabrics are not sticky, a roller is not stuck in the application process, the wet rubbing fastness improving effect is obvious, and the color yield of the finished fabrics is increased.

Description

technical field [0001] The invention relates to a wet rubbing fastness improving agent used in the textile industry and a preparation method thereof, in particular to polyurethane, a preparation method thereof and an application as a wet rubbing fastness improving agent. Background technique [0002] Polyurethane (referred to as PU), that is, polyurethane, is a polymer compound containing -NHCOO- unit structure. In 1937, German chemist Otto Bayer prepared polyurethane by the addition of isocyanate and active hydrogen compound, thus laying the foundation of polyurethane chemistry. In the 1950s, solvent-based polyurethane coatings were first applied in the dyeing and finishing industry in Europe. With the enhancement of people's awareness of environmental protection, water-based polyurethane has gradually replaced solvent-based polyurethane in recent years, and has developed rapidly in various industries. In the textile industry, water-based polyurethane can be used in water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F220/18C08F220/22C08F220/24C08G18/67C08G18/10D06M15/277D06M101/06
CPCC08F283/008C08G18/672D06M15/277D06M2101/06C08F220/1812
Inventor 党婉蓉李正雄
Owner SHANGHAI ARGUS NEW MATERIAL CO LTD