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High-temperature-resistant polyurethane ink binder as well as preparation method and application thereof

An ink binder, polyurethane technology, applied in the field of ink printing, can solve the problems of poor printing of active particles, long unsealing time, reduced polyurethane solubility, etc., to achieve excellent printing adaptability, weaken interaction, and improve heat resistance. Effect

Inactive Publication Date: 2020-03-31
HUANGSHAN ZHONGZE NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the polyurethanes known and reported in the prior art are prepolymerized by isocyanate and macromolecular polyester polyol or polyether polyol, and then obtained by chain extension of small molecular alcohol or amine. Flexibility and high temperature resistance requirements
In order to improve the high temperature resistance performance of polyurethane ink binder, Chinese patent CN102344540A discloses a resin for temperature resistant ink, which introduces a temperature resistant segment and a crystalline segment into polyester polyols, but the flexibility of the polyurethane prepared by this method Insufficient, poor printing adaptability
Another example is the flexible packaging high-barrier heat-sealing layer polyurethane polyurea ink binder disclosed in Chinese patent CN105754065A, which improves the temperature resistance and retort resistance of polyurethane by introducing the allophanate structure and improving the hardness of polyurethane; but the allophanate The introduction of polyurethane increases the microphase separation structure of polyurethane, reduces the solubility of polyurethane, and active particles are prone to appear during the printing process, resulting in poor printing
Another example is the resin for polyurethane ester latent curing ink of Chinese patent CN101781453A. By introducing a latent curing agent into the ink formula, and then deblocking and crosslinking at high temperature to improve the heat resistance of the ink; the latent curing agent has a deblocking temperature High, long unsealing time, it is difficult to obtain excellent high temperature resistance

Method used

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  • High-temperature-resistant polyurethane ink binder as well as preparation method and application thereof
  • High-temperature-resistant polyurethane ink binder as well as preparation method and application thereof
  • High-temperature-resistant polyurethane ink binder as well as preparation method and application thereof

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Effect test

Embodiment 1

[0041] The high-temperature-resistant polyurethane ink binder described in this embodiment includes the following composition in terms of the total amount of raw materials for its preparation:

[0042] 29.5wt% of raw materials for preparing the polyurethane;

[0043] Ethyl acetate 42.1wt%;

[0044] Isopropanol 28.4 wt%.

[0045] The preparation method of high temperature resistant polyurethane ink binder described in the present embodiment comprises the following steps:

[0046] (1) Mix 100 g of the polymer diol containing a carbamate structure, 8 g of diisocyanate, and 15 g of ethyl acetate uniformly in container 1, heat up to 110° C. and react for 2 hours to obtain a prepolymer; and add 60g ethyl acetate, stir 20min, obtain prepolymer dilution;

[0047](2) Add 5g of diamine chain extender, 0.4g of molecular weight modifier, 60g of ethyl acetate and 60g of isopropanol into container 2 and mix evenly to obtain a mixed solution, which is kept at 40°C;

[0048] (3) Pass N 2...

Embodiment 2

[0052] The high-temperature-resistant polyurethane ink binder described in this embodiment includes the following composition in terms of the total amount of raw materials for its preparation:

[0053] 32.3wt% of raw materials for preparing the polyurethane;

[0054] Ethyl acetate 67.7wt%.

[0055] The preparation method of high temperature resistant polyurethane ink binder described in the present embodiment comprises the following steps:

[0056] (1) Mix 200g of polymer diol containing urethane structure, 200g of polyester diol (molecular weight: 4000), 40g of diisocyanate, and 60g of ethyl acetate in container 1, and heat up to 110°C for reaction 2h to obtain a prepolymer; and add 350g of ethyl acetate and stir for 40min to obtain a prepolymer dilution;

[0057] (2) Add 24g of diamine chain extender, 2g of molecular weight regulator, and 500g of ethyl acetate into container 2, mix well, and keep warm at 55°C;

[0058] (3) Pass N 2 Transfer the prepolymer dilution from c...

Embodiment 3

[0062] The high-temperature-resistant polyurethane ink binder described in this embodiment includes the following composition in terms of the total amount of raw materials for its preparation:

[0063] 30wt% of raw materials for preparing the polyurethane;

[0064] Ethyl acetate 50wt%;

[0065] Isopropanol 20wt%.

[0066] The preparation method of high temperature resistant polyurethane ink binder described in the present embodiment comprises the following steps:

[0067] (1) Mix 200g of polymer diol containing urethane structure, 200g of polyester diol (molecular weight 4000), 25g of diisocyanate, and 60g of ethyl acetate in container 1, and heat up to 90°C for 3 hours , to obtain a prepolymer; and add 200g ethyl acetate, stir for 40min, to obtain a prepolymer dilution;

[0068] (2) Add 12g of diamine chain extender, 0.8g of molecular weight modifier, 400g of ethyl acetate and 200g of isopropanol into container 2, mix evenly, and keep warm at 40°C;

[0069] (3) Pass N 2 ...

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Abstract

The invention belongs to the technical field of ink printing, particularly relates to a high-temperature-resistant polyurethane ink binder, particularly relates to an intaglio printing polyurethane ink binder with excellent high-temperature resistance, heat sealing and pressing resistance and steaming and boiling resistance for food flexible packaging, and further discloses a preparation method ofthe polyurethane ink binder. The high-temperature-resistant polyurethane ink binder is a polyurethane polymer obtained by taking a polymer dihydric alcohol containing a carbamate structure, a polyester dihydric alcohol, a diisocyanate, a diamine chain extender, a molecular weight regulator and an epoxy cross-linking agent as raw materials and carrying out polymerization reaction. The polyurethaneink binder disclosed in the invention possesses the beneficial effects of the carbamate structure in the polymer dihydric alcohol, a thioether structure in the diamine chain extender and a rigid cross-linked structure of triepoxypropyl isocyanurate, so that the prepared ink has high temperature resistance, heat sealing and pressing resistance and steaming and boiling resistance, and excellent printing adaptability of the ink is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of ink printing, and in particular relates to a high-temperature-resistant polyurethane ink binder, in particular to a polyurethane ink binder for gravure printing for food flexible packaging with excellent high-temperature resistance, heat-resistant sealing and pressing performance, and excellent retort resistance, and further The preparation method thereof is disclosed. Background technique [0002] With the improvement of living standards, people have higher and higher requirements for food flexible packaging. They not only pay more attention to printing quality, but also pay more attention to environmental pollution in the production process and the safety of printing workshops. Soluble ink replaces benzene and ketone system ink, and gradually develops an environmentally friendly ink system to meet market demand. Heat sealing is an important process in plastic flexible packaging. It can ensure that the ...

Claims

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Application Information

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IPC IPC(8): C08G18/75C08G18/66C08G18/64C08G18/42C08G18/38C08J3/24C09D11/102
CPCC08G18/3868C08G18/4238C08G18/6415C08G18/6651C08G18/755C08J3/24C09D11/102
Inventor 赵勇进孙理曹雪芬胡观林汪泽宇汪琛雷
Owner HUANGSHAN ZHONGZE NEW MATERIAL CO LTD
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