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Preparation methods for polyester polyol and alcohol-soluble plastic printing ink polyurethane bonding material

A polyester polyol and plastic ink technology, applied in the polymer field, can solve the problems such as the inability to completely solve the environmental protection requirements of the ink, and achieve the effects of good adhesion fastness, simple synthesis process and high composite strength

Inactive Publication Date: 2015-09-23
广东天龙油墨有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above shortcomings that cannot completely solve the environmental protection requirements of inks, and can only use esters and alcohols as solvents, the present invention designs a polyester polyol, and uses the polyester polyol as a raw material to prepare plastic ink alcohol-soluble polyurethane Binder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. A preparation method of polyester polyol, comprising the following steps:

[0034] A) reaction under normal pressure conditions; 40 parts of adipic acid (weight fraction, the same below), 15 parts of dimer acid, 35 parts of dipropylene glycol, and 10 parts of neopentyl glycol were added to the reaction kettle, and carried out under nitrogen protection Reaction, reaching 140 ℃ and starting to produce water, controlling the heating rate to 8-13 ℃ / hour, and controlling the final temperature at 205-210 ℃; when the water output reaches more than 95% of the theoretical value, the next reaction stage is entered;

[0035] B) Reaction under vacuum conditions; firstly, the n-butyl titanate catalyst is added at a constant temperature of 0.01-0.02Mpa for 1 hour, accounting for 0.01-0.1% of the total moles of reactants, and then the vacuum degree is increased to 0.095Mpa, and the increase rate is controlled is -0.05~-0.01Mpa / hour; when the acid value is lower than 1mgKOH / g, the r...

Embodiment 2

[0042] 1. The preparation method of polyester polyol is the same as that in Example 1.

[0043] Two, using the polyester polyol obtained above to prepare alcohol-soluble polyurethane connecting material, comprising the following steps:

[0044] A) Synthesize a prepolymer; add 22 parts by weight (parts by weight, the same below) of the above polyester polyol and 5.5 parts of isophorone diisocyanate into the reaction kettle and mix them evenly, and react at 65 to 90° C. for 2-4 hours After that, start to cool down to below 45°C;

[0045] B) chain extension reaction; in above-mentioned reaction kettle, add 70 parts of isopropanol to reduce the viscosity of the system, then slowly dropwise add the mixture of 0.5 part of hexamethylene diamine and 1 part of isophorone diamine, react for one hour, wait until the viscosity is stable , filter and discharge to obtain alcohol-soluble plastic ink polyurethane connecting material;

[0046] C) The solid content of the resin is 29% and the...

Embodiment 3

[0048] 1. A preparation method of polyester polyol, comprising the following steps:

[0049]A) react under normal pressure conditions; 50 parts of sebacic acid (weight parts, the same below), 15 parts of dimer acid, 25 parts of dipropylene glycol, 10 parts of neopentyl glycol and other raw materials are added into the reactor, and the nitrogen The reaction is carried out under protection, and when the temperature of the water is reached, the temperature rise rate is controlled to 8-13°C / hour, and the final temperature is controlled at 205 to 210°C; when the water output reaches more than 95% of the theoretical value, the next reaction stage is entered;

[0050] B) Reaction under vacuum conditions; firstly, the n-butyl titanate catalyst is added after a constant temperature of 0.01-0.02Mpa for 1 hour, accounting for 0.01-0.1% of the total molar amount of the reactants, and then the vacuum degree is gradually increased to 0.095Mpa, and the control The increase rate is -0.05~-0.0...

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Abstract

The invention relates to the technical field of macromolecules, and discloses a preparation method for polyester polyol. Polyester polyol is prepared from polyhydric alcohol and polyatomic acid according to a certain proportion under the action of a catalyst, the number-average molar mass of polyester polyol is 1,500-3,000 g / mol, and the acid value of polyester polyol is smaller than 1 mgKOH / g. The invention further discloses an alcohol-soluble plastic printing ink polyurethane bonding material synthesized by polyester polyol and a preparation method for the alcohol-soluble plastic printing ink polyurethane bonding material. The bonding material comprises 65-72 percent of an organic solvent and 28-35 percent of a solid, wherein the solid is prepared by performing reaction on polyester polyol, isocyanate, the catalyst and a small molecule chain extender by a specific process; compared with other similar products, the resin, namely the bonding material, has the advantages that the cost is low, the resin is safe and environmental-friendly, environmental protection is facilitated, the resin can be soluble with an alcoholic solvent at any ratio, the heat resistance and the hydrolysis resistance are excellent, and the resin has good adhesion to various different printing base materials.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to the preparation of a polyester polyol and an alcohol-soluble polyurethane connecting material for plastic inks with low price, safety and environmental protection, and excellent performance prepared by using the polyester. Background technique [0002] With the improvement of people's living standards, the environmental protection and safety requirements for flexible packaging such as food and medicine are also getting higher and higher. Plastic ink has an irreplaceable position in the ink industry and printing industry due to its bright colors, beautiful appearance and other advantages. After decades of development of plastic inks in my country, the product system has gradually developed from benzene-soluble to ester-alcohol-soluble systems. However, according to the global trend analysis of increasingly stringent environmental protection and safety requirements, plastic inks w...

Claims

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Application Information

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IPC IPC(8): C08G63/16C08G63/183C08G18/42C08G18/66C08G18/32C08G18/73C08G18/75C09D11/102
Inventor 艾平科余中华王大田
Owner 广东天龙油墨有限公司
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