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Waterborne polyurethane adhesive for RFID antenna substrate

A technology of water-based polyurethane and adhesive, applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc.

Active Publication Date: 2010-12-01
华烁电子材料(武汉)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no relevant patents related to water-based polyurethane adhesives in the manufacture of RFID antenna substrates have been found.

Method used

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  • Waterborne polyurethane adhesive for RFID antenna substrate
  • Waterborne polyurethane adhesive for RFID antenna substrate
  • Waterborne polyurethane adhesive for RFID antenna substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Add 110g of polyester diol into a 500ml three-necked bottle equipped with a stirrer, an N2 gas guide tube and a thermometer, heat and melt at 120°C and 5mmHg, and vacuum dehydrate for 1 hour. Cool to about 60°C, add 43.2g of toluene diisocyanate (TDI), 0.35g of dibutyltin dilaurate (DBTDL) catalyst, 40g of methyl ethyl ketone, and keep warm at about 76°C for 1 hour to obtain a translucent liquid. Add 8.1g of 2,2'-dihydroxypropionic acid (DMPA), react at 70°C for 1 hour, react at 80°C for 1 hour, cool to 70°C, add 10g of 1,4-butanediol (BDO), and react for 2 hours , a yellowish translucent liquid was obtained. Cool to below 40°C, add triethylamine, adjust the pH to above 7, and keep the temperature for 0.5 hours to prepare a prepolymer, pour the obtained prepolymer into water containing 0.7wt% sodium dodecylbenzenesulfonate, Stir vigorously for 30 minutes, heat and vacuum distill butanone off to obtain a translucent bluish water-based polyurethane emulsion with a solid ...

Embodiment 2

[0041] The synthesis steps of the water-based polyurethane adhesive are the same as those in Example 1. The polyester polyol is replaced by polyether polyol, the methyl ethyl ketone is replaced by acetone, the reaction temperature for preparing the prepolymer is 85°C, the chain extension reaction temperature is 75°C, and the reaction is carried out for 4 hours. Aqueous polyurethane emulsion was prepared. Then mix 4 parts of dispersible polyisocyanate with 10 parts of water-based polyurethane emulsion, coat it on the polyester film, dry the solvent at 85°C, press it with aluminum foil or copper foil at 120°C, and cure at 110°C for 0.5 hours to obtain RFID antenna base material, the performance is shown in Table 1.

Embodiment 3

[0043] The synthesis steps of the water-based polyurethane adhesive are the same as in Example 1, replacing toluene diisocyanate with isophorone diisocyanate, sodium dodecylbenzenesulfonate with stearic acid, the prepolymer reaction temperature is 80°C, and the chain extension reaction temperature at 70°C for 3 hours to prepare a water-based polyurethane emulsion. Then mix 4 parts of blocked isocyanate with 8 parts of water-based polyurethane emulsion, coat it on the paper base, dry the solvent at 80°C, press it with aluminum foil or copper foil at 120°C, and cure it at 110°C for 1.5 hours to get the RFID antenna The properties of the base material are shown in Table 1.

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Abstract

The invention relates to a waterborne polyurethane adhesive for an RFID antenna substrate. The adhesive comprises polyurethane emulsion, a waterborne curing agent and a filler, and the composition according to weight percentage is as follows: 45%-65% of polyurethane emulsion, 25%-35% of waterborne curing agent, 5%-20% of filler, 0.2%-0.6% of deformer and 0.3%-0.7% of stabilizer, wherein the polyurethane emulsion comprises polyol, diisocyanate, a chain extender and an organic solvent, a prepolymer as shown in formula (II) is obtained by polycondensation in the presence of an organic tin type catalyst, m in the formula is equal to 1-100, and the formula (II) is dispersed in water containing an emulsifier, thereby preparing the emulsion with the solid content of 20-50% by weight. The adhesive is used for adhering a paper thin film or a polyester thin film with an aluminum foil or a copper foil. A prepared polyester or paper-based aluminum-coated plate and a polyester or paper-based copper-coated plate can be used for the RFID antenna substrate, and have high peeling strength, good acid and alkali resistance, good storage stability, excellent comprehensive performance and low cost.

Description

technical field [0001] The invention relates to the preparation and application of a water-based polyurethane adhesive for RFID antenna substrates. Background technique [0002] RFID (Radio Frequency Identification), or radio frequency identification, is an automatic identification technology that began to emerge in the 1990s. It uses radio frequency signals to achieve contactless information transmission through spatial coupling (alternating magnetic fields or electromagnetic fields) It is often called inductive electronic chips or proximity cards, proximity cards, contactless cards, electronic tags, electronic barcodes, etc. [0003] As the wireless version of the barcode, the electronic tag can identify the target object and obtain relevant data through radio frequency signals without manual intervention. RFID technology has the advantages of waterproof, antimagnetic, high temperature resistance, long service life, large reading distance, data on the label can be encrypt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04H01Q1/38
Inventor 范和平郭曦李桢林严辉
Owner 华烁电子材料(武汉)有限公司
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