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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

Active Publication Date: 2013-04-03
BEIJING COMENS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on the above-mentioned problems in the prior art, the embodiment of the present invention provides a method for preparing a resin for polyurethane latent curing ink, which can overcome the problem of poor temperature resistance of the ink made of resin for the existing single-component volatilization and drying ink

Method used

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  • Method for preparing resin for latently-curable polyurethane ink
  • Method for preparing resin for latently-curable polyurethane ink
  • Method for preparing resin for latently-curable polyurethane ink

Examples

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Embodiment 1

[0027] An embodiment of the present invention provides a method for preparing a polyurethane latent-curable ink resin, comprising:

[0028] Preparation of polyester diol:

[0029] Get each raw material of preparing polyester diol by following mass percentage:

[0030] Adipic acid 15-25%, terephthalic acid 15-25%, 1,3 butanediol 25-35% and 1,2 propylene glycol 20-30%;

[0031] Add adipic acid, terephthalic acid, 1,3 butanediol and 1,2 propylene glycol into the polyester synthesis kettle, raise the temperature to 200-240°C for esterification reaction, and react for 5-6 hours; keep the polyester synthesis kettle The water yield is stable at 2-4% / hour of the total mass of the raw materials used to prepare the polyester diol.

[0032] After the esterification reaction is completed, you can also confirm whether the esterification reaction is qualified by measuring the acid value of the product. If the acid value of the measured product is ≦20mgKOH / g, it is confirmed that the ester...

Embodiment 2

[0053] The present embodiment 2 provides a kind of preparation method of resin for polyurethane latent curing type ink, specifically comprises:

[0054] (1) To prepare polyester diol, take the following table to prepare the raw materials for polyester diol:

[0055]

[0056] The method for preparing polyester diol is:

[0057] a. Add adipic acid, terephthalic acid, 1,3 butanediol, 30 and 1,2 propanediol into the polyester synthesis kettle, raise the temperature to 240°C, and react for 5 hours. After the esterification reaction is completed, measure the acid value: 18mgKOH / g;

[0058] b. Vacuum down the inside of the polyester synthesis kettle to -0.04Mpa, pay attention to observe the water output of the polyester synthesis kettle, keep the water output stable at 15kg / hour, and stop the low vacuum after 1.5 hours of low vacuum (can be cut off and The connected vacuum pipeline valve realizes stopping the low vacuum in the polyester synthesis kettle), and puts the distillate...

Embodiment 3

[0071] The present embodiment 3 provides a kind of preparation method of resin for polyurethane latent curing type ink, specifically comprises:

[0072] (1) To prepare polyester diol, take the following table to prepare the raw materials for polyester diol:

[0073]

[0074] The method for preparing polyester diol is substantially the same as in Example 2, see Example 2, and will not be repeated here.

[0075] (2) Preparation of prepolymer:

[0076]

[0077] React the above-prepared polyester diol with isophorone diisocyanate (IPDI) at 110°C for 4 hours, and the obtained product is a prepolymer. The -NCO% content of the prepolymer is measured to be 6.9%;

[0078] (3) Preparation of resin A:

[0079]

[0080] Add toluene to the above-prepared prepolymer, stir evenly, and gradually add ethylenediamine chain extender and butanone, the temperature of the mixed liquid is controlled at 80°C, and the product obtained after 2 hours of reaction is resin A. Test viscosity 12...

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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.

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

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/06C08K5/3492C08G18/66C08G18/42C08G18/10C08G63/183C09D11/10C09D11/102
Inventor 赫长生沈峰邓煜东
Owner BEIJING COMENS NEW MATERIALS
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