Nano polyurethane adhesive and its preparation process

A polyurethane adhesive, nano-technology, applied in the field of nano-material modified polyurethane adhesive and its preparation, can solve the problems of intolerant plasticizer penetration, poor stability of production batches, poor adhesion, etc., and achieve simple operation process and high product quality Stabilization, initial tack and peel strength improvement effects

Inactive Publication Date: 2009-06-03
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the scale of polyurethane adhesive manufacturers in my country is small, the variety is single, the stability of product production batches is poor, and the technical level and performance of the products need to be further improved.
At the same time, most of my country's shoemaking industry uses neoprene, which is not resistant to the penetration of plasticizers, and has poor adhesion to new shoe materials such as soft PVC, thermoplastic rubber, and PU leather. Benzene toxic solvents must be used, which is no longer suitable for manufacturing. Footwear Industry Development Requirements

Method used

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  • Nano polyurethane adhesive and its preparation process
  • Nano polyurethane adhesive and its preparation process
  • Nano polyurethane adhesive and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Prepare one-component solvent-based nano-polyurethane adhesive for shoes according to the following formula and process:

[0045] formula:

[0046] The hydroxyl-terminated polyester is a hydroxyl-terminated polyadipate-1,4-butanediol ester diol with an average molecular weight of 2500;

[0047] The isocyanate is toluene diisocyanate;

[0048] The solvent is a mixed solvent (butanone, acetone, and ethyl acetate are mixed in parts by mass 25:30:30);

[0049] The nano filler is 200nm CaSO4 whisker without chemical modification;

[0050] The catalyst is dibutyltin dilaurate;

[0051] Inhibitor is benzoyl chloride;

[0052] Preparation Process:

[0053] (1) Weigh 400g of adipic acid and the corresponding 1,4-butanediol into the reactor according to the acid-alcohol molar ratio of 1:1.0~1.2, and add the temperature to 140°C within 60 minutes, add 0.6g of catalyst, and Stir under the protection of nitrogen, separate water, and control the fractional distillation temperat...

Embodiment 2

[0066] Prepare one-component solvent-based nano-polyurethane adhesive for shoes according to the following formula and process

[0067] formula:

[0068] The hydroxyl-terminated polyester is hydroxyl-terminated polyadipate-1,4-butanediol / 1,6-hexanediol ester diol with an average molecular weight of 3000;

[0069] The isocyanate is diphenylmethane diisocyanate;

[0070] The chain extender is 1,4-butanediol;

[0071] The solvent is a mixed solvent (butanone, acetone, and ethyl acetate are mixed in parts by mass 25:30:30);

[0072] The nano filler is chemically modified 200nm CaSO4 whisker;

[0073] The catalyst is dibutyltin dilaurate;

[0074] Inhibitor is benzoyl chloride;

[0075] Preparation Process:

[0076] (1) Weigh 400g of adipic acid and the corresponding 1,4-butanediol and 1,6-hexanediol (molar ratio of 1:3) into the reactor according to the acid-alcohol molar ratio of 1:1.0~1.2, Raise the temperature to 140°C within 60 minutes, add 0.6g of catalyst, stir under ...

Embodiment 3

[0091] Prepare one-component solvent-based nano-polyurethane adhesive for shoes according to the following formula and process

[0092] formula:

[0093] The hydroxyl-terminated polyester is a hydroxyl-terminated polyadipate-1,6-hexanediol ester diol with an average molecular weight of 2500

[0094] The isocyanate is 1,6-hexamethylene diisocyanate;

[0095] The chain extender is 1,4-butanediol;

[0096] The solvent is a mixed solvent (butanone, acetone, and ethyl acetate are mixed in parts by mass 25:30:30);

[0097] Nanofillers are nanoscale (<100nm=CaCO3 particles without chemical treatment;

[0098] Catalyst is diethanolamine;

[0099] Inhibitor is benzoyl chloride;

[0100] Preparation Process:

[0101] (1) Weigh 400g of adipic acid and the corresponding 1,6-hexanediol into the reactor according to the acid-alcohol molar ratio of 1:1.0~1.2, and add the temperature to 140°C within 60 minutes, add 0.6g of catalyst, and Stir under the protection of nitrogen, separate w...

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Abstract

This invention involves a nano-modified polyurethane adhesive materials and fabrication methods, which include the following components (weight ratio) : hydroxy-terminated polyester 60~80; isocyanate 3~10; chain extender 1~3; mixed solvent 200~400; Nanomaterials 1~3; catalyst 0.02~0.4; inhibitor 0.01. Preparation method: (1)add adipic acid, 1,4-butanediol into reactor, the temperature to 140 deg.C, add catalyst, control tower fractionation temperature 100~102 deg.C; (2) When the fractionation tower temperature less than 80 deg.C, gradually warming up to 210 deg.C, keep temperature under the protection of nitrogen; (3) evacuation under the reaction temperature of 210 deg. C; (4) add polyester into mixing reactor; (5) add isocyanates; (6) add catalyst for the shares, stir; (7) add nano-materials, stirring.

Description

technical field [0001] The invention relates to a nanometer material modified polyurethane adhesive and a preparation method thereof. Background technique [0002] Polyurethane is a kind of block compound with oligomeric polyol as soft segment and isocyanate and chain extender as hard segment. Its chemical structure contains urethane bond, ester bond, urea bond and allophanate bond, etc. A variety of polar bonds endow it with superior adhesive properties and film-forming properties. It is especially suitable for places where other types of adhesives cannot or are difficult to bond. It has excellent chemical adhesion to materials containing active hydrogen, such as porous materials such as foam plastics, wood, leather, fabrics, paper, ceramics, and materials with smooth surfaces such as metals, glass, rubber, and plastics. It is precisely because of the excellent bonding performance of polyurethane adhesives and the bonding adaptability to various substrates that its applic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/06
Inventor 张洪林张连红蒋林时张强佘红梅张忠生邱峰梁红玉姜虎生李长波赵国峥凤颀王德鹏
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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