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Preparation method of waterborne polyurethane adhesive for card matrix material

A water-based polyurethane and adhesive technology, applied in the direction of polyurea/polyurethane adhesives, adhesive types, adhesives, etc., can solve the blurring of UV test, the peeling strength of color card is difficult to maintain the value of wet heat aging, and the expected product cannot be achieved. and other problems to achieve the effect of avoiding the use of toxic solvents, good mechanical properties and high strength

Active Publication Date: 2013-06-26
江苏华信高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the water-based polyurethane adhesive products used for card substrate coating, the peel strength of the color card after lamination is difficult to maintain the humidity and heat aging value. For the anti-counterfeiting marks printed on the color card, most of them show that the UV test is blurred, which cannot meet the expectations of the product. Target
However, using a synergistic preparation method of various isocyanates, polyols and an appropriate amount of hydroxyacrylate, and can improve many technical indicators of the color card with adhesive film on the card substrate, this kind of process is rarely reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Add 50g of polybutylene adipate, 10g of polyhexamethylene adipate and 10g of polytetrahydrofuran diol into a 500ml four-neck flask, place them in a vacuum oven at 80°C for melting and mixing, and dehydrate After 1 hour, the temperature was lowered to 50°C and removed from the drying oven. Under the protection of dry nitrogen, a mixture of 35 g of isophorone diisocyanate and 3.5 g of dicyclohexylmethane-4,4-diisocyanate was added into the above-mentioned four-necked flask, and then the temperature was gradually raised to 80°C. After reacting for 1.5 hours, lower the temperature to 40°C, add 0.0217g of bismuth-zinc composite catalyst, 4.34g of hydrophilic chain extender dimethylol butyric acid, 2.17g of crosslinking agent 1,4-butanediol, trimethylolpropane 0.868g, 2.17g of β-hydroxyethyl methacrylate, the temperature was gradually raised to 60°C, and then 27.125g of acetone was added, and the reaction was continued for 4 hours. Cool down to 20°C, add 1.736g of triethylam...

Embodiment 2

[0061] Add 50g of polybutylene adipate, 15g of polyhexamethylene adipate and 15g of polytetrahydrofuran diol into a 500ml four-neck flask, place them in a vacuum oven at 85°C for melting and mixing, and dehydrate After 2 hours, the temperature was lowered to 60°C and removed from the drying oven. Under the protection of dry nitrogen, a mixture of 40 g of isophorone diisocyanate and 8 g of dicyclohexylmethane-4,4-diisocyanate was added into the above-mentioned four-neck flask, and then the temperature was gradually raised to 90° C. After reacting for 2 hours, lower the temperature to 50°C, add 0.0512g of bismuth-zinc composite catalyst, 6.4g of hydrophilic chain extender dimethylol butyric acid, 5.12g of crosslinking agent 1,4-butanediol, trimethylolpropane 1.28g, 5.12g of -β-hydroxyethyl methacrylate, gradually warming up to 65°C, then adding 44.8g of acetone, and continuing the reaction for 5 hours. Cool down to 25°C, add 3.2g of triethylamine for neutralization, and continu...

Embodiment 3

[0069] Add 50g of polybutylene adipate, 10g of polyhexamethylene adipate and 15g of polytetrahydrofuran diol into a 500ml four-neck flask, place them in a vacuum oven at 85°C for melting and mixing, and dehydrate 1 hour, then lower the temperature to 60°C and remove from the drying oven. Under the protection of dry nitrogen, a mixture of 37.5 g of isophorone diisocyanate and 7.5 g of dicyclohexylmethane-4,4-diisocyanate was added into the above four-necked flask, and then the temperature was gradually raised to 80°C. After reacting for 1.5 hours, lower the temperature to 40°C, add 0.048g of bismuth-zinc composite catalyst, 6.0g of hydrophilic chain extender dimethylol butyric acid, 4.8g of crosslinking agent 1,4-butanediol, trimethylolpropane 1.2 g, 4.8 g of β-hydroxyethyl methacrylate, gradually warming up to 60°C, then adding 31.25 g of acetone, and continuing the reaction for 5 hours. Cool down to 20°C, add 2.4g of triethylamine for neutralization, and continue the reactio...

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PUM

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Abstract

The invention provides a preparation method of waterborne polyurethane adhesive for a card matrix material, and belongs to the technical field of high polymer materials. The method comprises the following preparation steps of: carrying out polymerization reaction on mixed binary isocyanate formed by isophorone diisocyanate and dicyclohexyl methane-4,4-diisocyanate and polyhydric alcohol of taking polyester diol as a primary material and polyether glycol as an auxiliary material; adding proper hydroxyl acrylate to a reaction system, and preparing a polyurethane prepolymer by virtue of a chain extender; neutralizing by use of triethylamine, and adding water to emulsify in a high-speed disperser, so as to obtain a waterborne polyurethane dispersing body; adding ethanediamine to carry out chain extension again, and finally mixing with assistants such as a defoamer, a thickener, anti-adhesive and an ultraviolet light absorber to obtain the waterborne polyurethane adhesive for the card matrix material. The preparation method has the characteristics of being low in preparation cost, strong in adhesion and the like, is simple in production technology and can be used for easily coating products; the solid content can achieve 40%; and the coated film with glue is especially suitable for coating various color cards.

Description

technical field [0001] The invention relates to a method for preparing a water-based polyurethane adhesive for card substrate coating, and belongs to the technical field of polymer materials. Background technique [0002] With the development of the economy and the rapid advancement of computer technology and digital printing technology, modern card production technology, as a new independent discipline, has been rapidly improved. Due to the extremely wide application of card cards, and the variety and quantity of them, the development of adhesives for card substrate coating has been driven. All kinds of adhesives used at the beginning were mainly solvent-based polyurethanes, but the organic solvents were flammable, explosive, smelly, volatile, easy to cause air pollution when used, and had certain toxicity. In recent years, due to the pressure of public opinion to protect the environment and people's awareness of environmental protection, many countries have formulated law...

Claims

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Application Information

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IPC IPC(8): C09J175/14C08G18/75C08G18/67C08G18/66C08G18/48C08G18/42C08G18/34C08G18/22C08G18/12
Inventor 周建石张道远王光战张金山马全岭
Owner 江苏华信高新材料有限公司
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