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Preparation method of polyurethane resin for single-component steaming and boiling resistant composite ink

A technology of polyurethane resin and retort resistance, applied in the field of polyurethane, can solve the problems of high toxicity of curing agent, difficult to store, inconvenient to use, etc., and achieves the effects of good adhesion fastness, good dispersion and good retort resistance.

Inactive Publication Date: 2012-11-28
山西省应用化学研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of polyurethane resin for one-component retort-resistant composite ink, so as to solve the problems of the existing two-component retort-resistant composite ink, such as high toxicity of curing agent, difficult storage, inconvenient use, etc.

Method used

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  • Preparation method of polyurethane resin for single-component steaming and boiling resistant composite ink
  • Preparation method of polyurethane resin for single-component steaming and boiling resistant composite ink

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Add 131.5g of adipic acid, 56.4g of dimer acid, and 188.9g of 2-methyl-1,8 octanediol into a four-necked flask, stir and raise the temperature in a nitrogen environment, when the reactants are melted, add 0.030g of tetrabutyl titanate, react at 170°C for 3h, then heat to 230°C to react to an acid value of 8.76mgKOH / g, reduce pressure to below 0.02MPa, react at 240°C to an acid value of 0.35mgKOH / g, stop For the reaction, the measured hydroxyl value is 56.64 mgKOH / g. Cool down to 40°C, then add 88.9g IPDI, 11.3g IPDI trimer, 0.041g dibutyltin dilaurate, heat up to 70°C to react until the mass fraction of isocyanate groups in the system is 4.87%, cool to room temperature, add 340.0g acetic acid Ethyl ester, 793.3g ethanol, 41.8g IPDA, 2.0g WD-52, 0.9g ethanolamine were reacted at 35°C for 2h to obtain a product with a solid content of 30%, a viscosity of 970mPa·s / 25°C, and a number average molecular weight of 42215.

Embodiment 2

[0022] Example 2: Add 173.0g azelaic acid, 45.1g dimer acid, 99.8g neopentyl glycol, 31.8g dipropylene glycol into a four-necked flask, stir and raise the temperature in a nitrogen environment, when the reactants are melted, add 0.028g of tetrabutyl titanate, react at 170°C for 3h, then heat to 230°C to react to an acid value of 7.98mgKOH / g, reduce pressure to below 0.02MPa, react at 240°C to an acid value of 0.32mgKOH / g, stop For the reaction, the measured hydroxyl value is 66.12 mgKOH / g. Cool down to 40°C, then add 89.0g HMDI, 13.1g IPDI trimer, 0.038g dibutyltin dilaurate, heat up to 70°C to react until the mass fraction of isocyanate groups in the system is 3.73%, cool to room temperature, add 314.2g acetic acid Ethyl ester, 733.2g ethanol, 29.2g IPDA, 2.0g KH-792, 1.9g di-n-butylamine, react at 35℃ for 2h to obtain the product, solid content 30%, viscosity 1050mPa·s / 25℃, number average molecular weight 44075 .

Embodiment 3

[0023] Example 3: Add 178.0g of sebacic acid, 67.7g of dimer acid, and 139.8g of 3-methyl-1,5 pentanediol into a four-necked flask, stir and raise the temperature in a nitrogen environment, when the reactants are melted, add 0.031g of tetrabutyl titanate, react at 170°C for 3h, then heat to 230°C to react to an acid value of 8.82mgKOH / g, reduce pressure to below 0.02MPa, react at 240°C to an acid value of 0.38mgKOH / g, stop For the reaction, the measured hydroxyl value is 55.49 mgKOH / g. Cool down to 40°C, then add 83.0g IPDI, 12.5g IPDI trimer, 0.042g dibutyltin dilaurate, heat up to 70°C to react until the mass fraction of isocyanate groups in the system is 4.29%, cool to room temperature, add 339.5g acetic acid Ethyl acetate, 792.2g ethanol, 36.9g IPDA, 1.9g WD-53, 1.2g diethanolamine were reacted at 35°C for 2h to obtain a product with a solid content of 30%, a viscosity of 1250mPa·s / 25°C, and a number average molecular weight of 49935.

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Abstract

The invention discloses a preparation method of a polyurethane resin for a single-component steaming and boiling resistant composite ink. The method comprises the following steps of: first, reacting a mixed acid of dimer acid and aliphatic dibasic acid with aliphatic dibasic alcohol with a branched chain, so as to synthesize polyester diol; and then adding a trimer mixture of aliphatic or alicyclic diisocyanate and isocyanate, a diamine chain extender and a molecular weight regulator to the polyester diol to react with the polyester diol, so as to prepare the polyurethane resin for the single-component steaming and boiling resistant composite ink. According to the invention, the prepared polyurethane resin obtains better steaming and boiling resistance; and the single-component ink prepared by the polyurethane resin can resist steaming and boiling at 100-125 DEG C, obtains good adhesion to various plastic base materials with different polarities, such as PET (Polyethylene Terephthalate), NYLON, BOPP (Biaxially-oriented Polypropylene) and the like, and obtains perfect pigment wetting and dispersing property. According to the invention, the prepared polyurethane resin has the advantage of no aromatic isocyanate curing agent damage; and as ethanol and ethyl acetate are used as a solvent, no benzene and no ketone of the polyurethane resin for the ink are achieved, and environment friendliness and safety are also achieved.

Description

Technical field [0001] The invention belongs to the technical field of polyurethane, and relates to a preparation method of a polyurethane resin, in particular to a preparation method of a polyurethane resin for a single-component cooking-resistant composite ink. Background technique [0002] In recent years, the food industry has developed rapidly. As a composite flexible packaging "retort bag" for food packaging, it has greatly promoted its development. The retort pouch has a good barrier to oxygen and water, and can be sterilized under a certain time of retorting state, which can make the packaged food easier to keep fresh and have a longer shelf life. The cooking process has higher requirements for the printing ink used on the cooking bag. In addition to good printing adaptability and adhesion fastness, the cooking-resistant composite ink must also withstand 100-135°C for 20-40 minutes, and the ink layer cannot Wrinkle, no discoloration, no separation of the composite layer....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/79C08G18/75C08G18/73C08G18/68C08G18/66C08G18/42C08G18/10C08G63/54C08G63/52C09D11/10C09D11/00C09D11/102
Inventor 石红翠张博郭晓勇毛祖秋贾金兰侯彩英马国章
Owner 山西省应用化学研究所
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