Preparation and use of cation aqueous polyurethane emulsion

A water-based polyurethane, cationic technology, applied in the direction of water repellent addition, pulp raw material addition process, textiles and papermaking, etc., can solve the problems of limiting the application of cationic polymers, and achieve good sizing effect, related performance improvement, and energy saving. Effect
CN101440152AInactive Publication Date: 2009-05-27TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Publication Date
2009-05-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for preparing cationic waterborne polyurethane surface sizing agent capable of being used as paper and paperboard surface sizing agent. Toluene di-isocyanate (TDI), polyester dibastic alcohol, polyethylene glycol, 1,4-butanediol and N-methyldiethanolamine as a hydrophilic chain extender are selected to synthesize a cationic waterborne polyurethane emulsion by an internal emulsification method. The prepared polyurethane emulsion can be well used in cooperation with aluminum sulfate, poly aluminum and other aluminum salts. When the prepared polyurethane emulsion is used in cooperation with starch, aluminum salts and the like for the surface sizing of paper and paperboards, good sizing effects can be obtained, and the correlation of the paper and the paperboards can be greatly improved.
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Description

technical field

[0001] The invention relates to a preparation method of a cationic water-based polyurethane emulsion, in particular to a preparation method of a cationic water-based polyurethane surface sizing agent which can be used as a paper surface sizing agent. Background technique

[0002] Known polyurethane is the product of the addition polymerization reaction of diisocyanate and polyol. With its non-toxic, non-flammable, oil resistance, high strength and film-forming properties, it is widely used in plastics, coatings, It has been widely used in many fields such as pigments and architecture, which has attracted the attention of the paper industry.

[0003] At present, the known water-based polyurethane (WPU) is a water-based polyurethane dispersion system, and its water-based transformation can be mainly realized by two methods: forced emulsification and self-emulsification. The self-emulsification method is to introduce a hydrophilic group into the polyurethane pr...

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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