Method for preparing resin for latently-curable polyurethane ink

A resin for ink and latent curing technology, which is applied in the field of preparation of resin for polyurethane latent curing ink, can solve the problems of poor temperature resistance of ink, achieve the effects of improving adhesion fastness, ensuring storage life, and improving temperature resistance
CN101781453BActive Publication Date: 2013-04-03BEIJING COMENS NEW MATERIALS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING COMENS NEW MATERIALS
Publication Date
2013-04-03

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Abstract

The invention discloses a method for preparing resin for latently-curable polyurethane ink. The method for preparing the resin comprises the following steps of: preparing polyesterglycol: adding adipic acid, terephthalic acid, 1,3-butanediol and 1,2-propylene glycol into a polyester synthesis kettle, heating the mixture to 200 to 240 DEG C to perform esterification for 5 to 6 hours and generatinglow vacuum, high vacuum and long vacuum in the polyester synthesis kettle to obtain the polyesterglycol by polycondensation; preparing prepolymers: performing a reaction of the prepared polyesterglycol and diisocyanate to obtain a product, of which the isocyanic acid group content is 3 to 4 percent and which is the prepolymer; preparing the resin A: adding an organic solvent into the prepared prepolymer, uniformly stirring, adding the mixture into a polyamine chain extender and an organic solvent to perform an reaction for 2 to 3 hours at the temperature of between 70 and 80 DEG C to obtain the resin A; and mixing: mixing the prepared resin A and the latent-curing agent, stirring the mixture for 0.5 to 1 hour to obtain the resin for the latently-curable polyurethane ink. The resin has theadvantages of good ink-preparing performance and high temperature resistance.
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Description

technical field

[0001] The invention relates to a preparation method of a resin for ink, in particular to a preparation method of a polyurethane latent curing resin for ink. Background technique

[0002] Ink binder is one of the key materials for ink preparation. The various properties of the ink binder determine the various adaptability of the printing ink. The resins used for plastic gravure printing inks generally include chlorinated polypropylene, polyamide, polyurethane, etc. For a long time, chlorinated polypropylene has occupied most of the resin market for gravure composite back printing ink due to its low price and excellent adhesion to OPP. Solvents such as esters and alcohols have no effect on it. Solvent-based polyurethane ink binder has the advantages of easy use, stable performance, strong adhesion, excellent gloss, and good heat resistance. It can meet the requirements of various printing methods, especially for screen printing, plastic packaging and composi...

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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