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Preparation method of adhesive for table printing ink

An adhesive and ink technology, applied in ink, application, household appliances, etc., can solve the problems of high odor, poor water resistance, intolerance to grease and freezing of surface printing ink, and achieve good environmental protection, low odor, improved Wetting and dispersing effects

Active Publication Date: 2014-07-09
NANTONG GAOMENG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for preparing an adhesive for surface printing inks, which can overcome the deficiencies of existing polyamide surface printing inks and meet the performance requirements for liquid packaging, thereby solving the problem of existing polyamide surface printing inks. Amide-based surface printing inks have strong odor, poor water resistance, and are not resistant to grease and freezing

Method used

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  • Preparation method of adhesive for table printing ink
  • Preparation method of adhesive for table printing ink
  • Preparation method of adhesive for table printing ink

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preparation example Construction

[0013] The embodiment of the present invention provides a method for preparing an adhesive for surface printing ink, which is an alcohol-soluble polyurethane resin adhesive, and the method comprises the following steps:

[0014] Preparation of NCO-terminated prepolymers:

[0015] Mix 42-73 parts by mass of polyether diol, 4-19 parts by mass of aldehyde and ketone resin, 0.05-0.1 part by mass of catalyst, and 23-39 parts by mass of diisocyanate, then react at 70-120°C The reaction product obtained after 2 to 4 hours is the NCO-terminated prepolymer, and the structure of the NCO-terminated prepolymer is: OCN-B-(-NH-CO-O-R 1 -O-CO-NH-) m -B-NCO; where, R 1 Is a methyl group, methylene group, ether group, cyclohexyl group or aromatic hydrocarbon group, B is a methyl group, methylene group, aromatic hydrocarbon group or alicyclic hydrocarbon group;

[0016] Chain extension synthesis:

[0017] Mix 1.2 to 6 parts by mass of amine chain extenders, 26 to 38 parts by mass of ester s...

Embodiment 1

[0031] (1) Preparation of NCO-terminated prepolymer:

[0032]

[0033] Mix 73 parts by mass of PPG2000, 4 parts by mass of aldehyde and ketone resin, 0.05 parts by mass of catalyst, and 23 parts by mass of MDI, and react at 70°C for 4 hours to obtain a prepolymer with an NCO of 1.97%;

[0034] (2) Chain extension synthesis:

[0035]

[0036] Prepare another flask, add 1.2 parts by mass of ethylenediamine, 26 parts by mass of n-propyl acetate, and 31 parts by mass of ethanol, stir evenly to form a mixed solution, and place 41.8 parts by mass of the prepolymer prepared in step (1) in Put it into the above mixed solution for chain extension reaction within 5 minutes. The reaction temperature is controlled at 30°C. After 2.5 hours of reaction, the polyurethane resin is obtained, which is the adhesive for surface printing ink.

Embodiment 2

[0038] (1) Preparation of NCO-terminated prepolymer:

[0039]

[0040]

[0041] Mix 63 parts by mass of PEG2000, 13 parts by mass of aldehyde and ketone CA, 0.1 part by mass of catalyst, and 24 parts by mass of TDI, and react at 90°C for 3 hours to obtain a prepolymer with an NCO of 2.88%;

[0042] (2) Chain extension synthesis:

[0043]

[0044] Prepare another flask, add 3.2 parts by mass of 1,6-hexamethylenediamine, 38 parts by mass of butyl acetate, and 19 parts by mass of isopropanol, stir evenly to form a mixed solution, and prepare 40 parts by mass of The obtained prepolymer is put into the above mixed solution for chain extension reaction within 30 minutes, the reaction temperature is controlled at 40° C., and the polyurethane resin is obtained after 2 hours of reaction, which is the adhesive for surface printing ink.

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Abstract

The invention discloses a preparation method of an adhesive for table printing ink, belonging to the field of preparation of adhesives for ink. The preparation method disclosed by the invention comprises the following steps of firstly, reacting diisocyanate and high-molecular polyhydric alcohol with keto-aldehyde resin to generate a prepolymer, the terminal group of which is NCO, and then, adding the prepolymer into a solution containing an amine chain extender, thereby obtaining polyurethane resin for table printing ink. The adhesive is alcohol-ester soluble polyurethane resin free of a free isocyanate group; keto-aldehyde resin is subjected to grafting reaction in the resin, so that the table printing ink prepared from the resin has excellent luster and good adhesive force; the table printing ink prepared by utilizing the adhesive is high in glossiness; in addition, the binding strength among the table printing ink and various printing substances is high.

Description

technical field [0001] The invention relates to the field of preparation of adhesives for inks, in particular to a method for preparing adhesives for high-gloss surface printing inks with good plastic adhesion. Background technique [0002] At present, surface printing inks are widely used in the field of liquid packaging such as juice, milk, sweet noodle sauce, etc. [0003] The surface printing ink currently used in the domestic printing industry is generally made of polyamide resin. Polyamide surface printing ink is the earliest surface printing ink developed in my country, and the production process is relatively mature. This type of ink is suitable for polyethylene film, and the ink layer has good adhesion fastness and good gloss. [0004] However, polyamide-based surface printing inks generally have performance defects such as strong odor, poor water resistance, oil resistance, and freezing resistance. In particular, when polyamide surface printing inks are used in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/54C08G18/12C09D11/102
CPCC08G18/12C08G18/4027C08G18/548C08G18/6685C09D11/102C08G18/3228C08G18/3234
Inventor 王登科沈峰王宏伟
Owner NANTONG GAOMENG NEW MATERIAL
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