Water-based cationic polyurethane bridging agent

A cationic, polyurethane technology, applied in the field of chemistry, can solve the problems of difficulty in direct emulsification or dispersion, severe, shrinkage on the surface of the fabric, etc., and achieve the effects of improving environmental protection, stable storage and reducing content
CN102391467AInactive Publication Date: 2012-03-28WUJIANG BEISHE SHENGYUAN TEXTILE PROD AUXILIARIES PLANT
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUJIANG BEISHE SHENGYUAN TEXTILE PROD AUXILIARIES PLANT
Publication Date
2012-03-28
Estimated Expiration
Not applicable · inactive patent
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Abstract

The invention discloses a water-based cationic polyurethane bridging agent. The water-based cationic polyurethane bridging agent is prepared by the following technological steps of: a, adding an N-methylpyrrolidone solvent, diphenylmethanediisocyanate (MDI) and a composite catalyst sequentially into a reactor and heating to 40 DEG C to dissolve the materials completely; b, adding trimethoprim (TMP) slowly in 0.5 to 2 hours, and heating to the temperature of between 30 and 70 DEG C to dissolve the TMP with stirring; and c, adding a cationic hydrophilic agent of diethanol amine, heating to the temperature of between 60 and 100 DEG C, reacting for 1 to 4 hours, cooling to the temperature of below 60 DEG C, adding a small amount of N,N-dimethylethanolamine for neutralization, stirring for 30 MDIn, adding deionized water, and stirring uniformly to obtain faint yellow transparent liquid. The water-based cationic polyurethane bridging agent reduces toxicity, improves water dispersibility of prepolymer, excellent heat treatment performance and storage stability, is suitable for industrialized production, can be widely applicable to crosslinking bridging agents of water-based coatings and dyes, and can also serve as a non-shrinking finishing agent for silk and wool.
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Description

technical field

[0001] The invention belongs to the field of chemistry, in particular to the preparation of modified polyurethane materials. Background technique

[0002] The use of polyurethane prepolymers with NCO end groups as cross-linking bridging agents for textile printing and dyeing fabrics requires excellent adhesion, abrasion resistance, good toughness, and good water resistance. Water-based polyurethane has the above advantages, and there are many studies on water-based polyurethane to increase water resistance. Traditional polyurethane bridging agents are difficult to directly emulsify or disperse in water, and the surface of the fabric obtained during textile printing and dyeing will shrink greatly. Contents of the invention

[0003] The purpose of the present invention is to provide a low content of free TDI, a novel water-based cationic polyurethane bridging agent, which is stable in storage, excellent in heat treatment performance, and suitable for industr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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