Method for preparing resin for latently-curable polyurethane ink

A technology of resin and polyurethane ester for ink, applied in ink, application, household appliances, etc., can solve the problems of poor temperature resistance of ink, and achieve the effect of improving adhesion fastness, improving temperature resistance and ensuring storage life.

Active Publication Date: 2010-07-21
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 problems existing in the above-mentioned prior art, the embodiment of the present invention provides a method for preparing a polyurethane latent curing ink resin, which can overcome the poor temperature resistance of the ink made of the existing single-component volatilization and drying ink resin. question

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] The embodiment of the present invention provides a method for preparing polyurethane latent curing type ink resin, comprising:

[0028] Preparation of polyester diol:

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

[0030] 15-25% adipic acid, 15-25% terephthalic acid, 25-35% 1,3 butanediol and 20-30% 1,2 propanediol;

[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, then confirm that the esterific...

Embodiment 2

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

[0054] (1) prepare polyester diol, get and prepare each raw material of polyester diol as follows:

[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. Draw low vacuum to -0.04Mpa in the polyester synthesis kettle, pay attention to observe the water outlet 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 vacuum pipeline valve that connects realizes stopping to draw low vacuum in the polyester synthetic kettle), puts distillate;

[0059] c. Then co...

Embodiment 3

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

[0072] (1) prepare polyester diol, get and prepare each raw material of polyester diol as follows:

[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] The above-prepared polyester diol and isophorone diisocyanate (IPDI) were reacted at 110°C for 4 hours, and the obtained product was a prepolymer, and the -NCO% content of the prepolymer was 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 1200m...

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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 Applications(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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