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Alcohol-soluble polyurethane resin used in plastic ink and preparation method thereof

A technology of alcohol-soluble polyurethane and plastic ink, which is applied in ink, application, household appliances, etc. It can solve the problems of not being able to use water, achieve good adhesion, good transferability and fastness of adhesion, and be beneficial to health and safety.

Inactive Publication Date: 2013-04-17
DONGGUAN HONGDA POLYUREFHANE RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this invention only uses alcohol esters as a solvent, and water cannot be used as a substitute solvent or part of the solvent when it is made into ink.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 A kind of alcohol-soluble polyurethane resin for plastic ink provided in this embodiment is made of the following components and parts by weight thereof: 2.5-8 parts of polyester polyol, 20-30 parts of polyether polyol, 5 parts - 10 parts of diisocyanate, 1-5 parts of diamine, 60-66 parts of alcohol diluent, 0.01-0.15 parts of stabilizer.

[0030] The polyester polyol is of the dihydroxy type, composed of one or more of adipic acid, phthalic acid, azelaic acid, sebacic acid and 1,4-butanediol, 1,6-hexanediol It can be obtained by one or several kinds of reactions, the molecular weight is 1000-3000, and the hydroxyl value is 37-112mgKOH / g.

[0031] The polyether polyol is polyoxypropylene diol with a molecular weight of 1000-3000.

[0032] The diisocyanate is one or more of isophorone diisocyanate (IPDI), 1,6-hexyl isocyanate (HDI), and dicyclohexylmethane diisocyanate (HMDI).

[0033] The diamine is one or more of ethylenediamine, butylenediamine, hexamet...

Embodiment 2

[0049] The alcohol-soluble polyurethane resin for plastic ink provided by the present embodiment and its preparation method are basically the same as in Example 1, except that:

[0050] A kind of preparation method that realizes described plastic ink uses alcohol-soluble polyurethane resin, comprises the steps:

[0051] (1) Dehydration of raw materials

[0052] Weigh the raw materials according to the set ratio, and make the polyester polyol 10.4 with a molecular weight M of 1000 and 112 mgKOH / g made from the polyester polyol prepared by adipic acid and 1,4-butanediol. gram, polyoxypropylene diol (M=2000) 63.0 grams and polyoxypropylene diol (M=1000) 31.2 grams, heat up 105 ℃~110 ℃, dehydrate under the condition of vacuum degree-0.095MPa 1-2 hour.

[0053] (2) Synthetic prepolymer

[0054] Cool down below 60°C, add 0.375g of antioxidant 264 and 0.25g of antioxidant 1010 into the reaction kettle, pass nitrogen for protection, then add 31.3g of isophorone diisocyanate, react a...

Embodiment 3

[0060] The alcohol-soluble polyurethane resin and preparation method thereof provided by the present embodiment are basically the same as those in Examples 1 and 2, except that:

[0061] The raw materials weighed according to the set ratio are:

[0062] The molecular weight M that is synthesized by sebacic acid and 1,4-butanediol is 22.1 grams of polyester polyols of 3000, hydroxyl value 75mgKOH / g; Polyoxypropylene diol (M=2000) 68.0 grams and polyoxypropylene diol Alcohol (M=1000) 36.2 grams; 0.2 grams of antioxidant 264 and 0.14 grams of antioxidant 1010; 41.7 grams of isophorone diisocyanate; 12.9 grams of isophorone diamine; 136.8 grams of isobutanol and 139 grams of ethanol diluted agent.

[0063] The obtained alcohol-soluble polyurethane resin for plastic ink has an average molecular weight of 25000 and a solid content of 35%.

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Abstract

The invention discloses an alcohol-soluble polyurethane resin used in plastic ink. The alcohol-soluble polyurethane resin is characterized by comprising the following ingredients by weight: 2.5-8 parts of polyester polyol, 20-30 parts of polyether polyol, 5-10 parts of diisocyanate, 1-5 parts of diamine, 60-66 parts of alcohol diluent, and 0.01-0.15 part of stabilizer. The invention further discloses a preparation method of the alcohol-soluble polyurethane resin used in plastic ink, and the preparation method is simple in process and low in equipment requirement. The average molecular weight of the alcohol-soluble polyurethane resin used in plastic ink is 20000-30000, and the solid content is 34-36%, and the alcohol-soluble polyurethane resin can be used as a bonding material to be prepared into ink, merely the alcohol is used as a solvent, and as the solvent or a part of solvent is replaced by water, the alcohol-soluble polyurethane resin is environmental-friendly, safe, very beneficial for environmental protection and convenient to use; the diluent can be a water solution of water and alcohol or alcohol; a printed ink layer is high in glossiness and has good transparency, water resistance and weather resistance; and as a result, the alcohol-soluble polyurethane resin is suitable for various intaglio and rotation flexography, with good transitivity and adhesion solidness.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to an alcohol-soluble polyurethane resin for plastic ink and a preparation method thereof. Background technique [0002] In the prior art, the liquid part in the ink composition is called the binder; the solid part is the colorant (pigment or dye); and various auxiliary agents. The binder is a colloidal fluid with a certain viscosity. Its function is firstly as a carrier of the pigment, mixing and connecting solid particles such as powdered pigments, and the pigment is evenly dispersed in it, relying on its wetting effect , it is easier to be ground on the grinding machine; secondly, as a binder, the pigment can finally be fixed on the surface of the substrate to achieve the purpose of displaying text, images, marks, decorations, etc. It is also by its adhesion that the ink can be transferred and transferred on the printing press. Finally, on the printed matter, the bind...

Claims

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Application Information

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IPC IPC(8): C08G18/75C08G18/73C08G18/66C08G18/48C08G18/42C08G18/32C08G18/12C09D11/10C09D11/102
Inventor 刘云发原素萍王瑞宏
Owner DONGGUAN HONGDA POLYUREFHANE RESIN
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