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Reactive polyurethane hot melt adhesive and preparation method thereof

A polyurethane hot melt adhesive, reactive technology, applied in the chemical field, can solve the problems of slow curing speed, poor thermal shock resistance, poor aging resistance, etc.

Active Publication Date: 2014-03-12
YANTAI DARBOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the weaknesses of low bonding strength, poor cold and heat shock resistance, poor water resistance, poor aging resistance and slow curing speed of PUR glue in the prior art, the invention provides a reactive polyurethane hot melt adhesive and its The preparation method, the reactive polyurethane hot melt adhesive prepared by the present invention is a single-component moisture-curing polyurethane adhesive, which belongs to the solvent-free and environmentally friendly adhesive industry, and is used in the bonding of plastics and various metal substrates in the electronics and microelectronics industries , the reactive polyurethane hot melt adhesive prepared by the present invention has good bonding strength, flexibility, thermal shock resistance, water resistance and aging resistance, and improves the curing speed, which greatly improves the performance of PUR adhesive

Method used

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  • Reactive polyurethane hot melt adhesive and preparation method thereof
  • Reactive polyurethane hot melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 21 parts of polyether polyol PPG2100 and 43 parts of polyester polyol POL-356T into the reaction kettle, vacuum dehydrate at 120°C for 2 hours, and keep the vacuum at -0.09MPa. Then cool to 80°C, add 10 parts of reactive plasticizer "Nikanol" resin and 14 parts of 4,4'diphenylmethane diisocyanate MDI while stirring, then slowly raise the temperature, control the temperature at 80°C, and fill with nitrogen at the same time Protection, reaction for 2.5 hours. After sampling and analysis, the NCO% content reaches the design value of 2.5%, then add 11 parts of terpene resin, 2 parts of latent curing agent ALT-101, and 0.2 parts of catalyst triethylenediamine. Under the condition that the temperature is 100°C, vacuumize until no air bubbles appear, then discharge, and seal the package. Obtain the PUR glue of the present invention and place it for use.

Embodiment 2

[0030] Add 10 parts of polyether polyol PPG220 and 50 parts of polyester polyol XCP-3000H into the reaction kettle, vacuum dehydrate at 110°C for 2.5 hours, and keep the vacuum at -0.08MPa. Then cool to 80°C, add 8 parts of reactive plasticizer "Nikanol" resin and 13 parts of toluene diisocyanate TDI80 / 20 while stirring, then slowly raise the temperature, control the temperature at 70°C, and fill with nitrogen protection at the same time, react for 2.5 hours . After sampling and analysis, the NCO% content reaches the design value of 2.0%, then add 6 parts of petroleum tackifying resin, 3 parts of latent curing agent ALT-101, and 0.1 part of catalyst dibutyltin dilaurate. Under the condition that the temperature is 90° C., vacuumize until no air bubbles appear, and then discharge the material and seal the package. Obtain the PUR glue of the present invention and place it for use.

Embodiment 3

[0032] Add 30 parts of polyether polyol PPG204 and 30 parts of polyester polyol POL-356T into the reactor, vacuum dehydrate at 110°C for 3.5 hours, and keep the vacuum at -0.09MPa. Then cool to 80°C, add 18 parts of reactive plasticizer "Nikanol" resin and 16 parts of 4,4'diphenylmethane diisocyanate MDI while stirring, then slowly raise the temperature, control the temperature at 80°C, and fill with nitrogen at the same time Protection, reaction for 2.5 hours. After sampling and analysis, the NCO% content reaches the design value of 2.8%, then add 10 parts of terpene tackifying resin and 10 parts of petroleum tackifying resin, 1 part of latent curing agent ALT-101, 0.1 part of catalyst dibutyltin dilaurate and three 0.3 parts of ethylene diamine. Under the condition that the temperature is 110° C., vacuumize until no air bubbles appear, and then discharge the material and seal the package. Obtain the PUR glue of the present invention and place it for use.

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Abstract

The invention relates to a reactive polyurethane hot melt adhesive, consisting of the following raw materials in parts by weight: 10-30 parts of polyether polyol, 30-50 parts of polyester polyol, 12-16 parts of isocyanate, 6-20 parts of tackifying resin, 8-20 parts of reactive plasticizer, 1-3 parts of latent curing agent and 0.1-0.5 part of catalyst. The reactive polyurethane hot melt adhesive prepared by the invention has good bonding strength, flexibility, hot and cold shock resistance, water resistance and aging resistance, and the curing speed is improved to greatly perfect the performance of PUR (Polyurethane) adhesive.

Description

technical field [0001] The invention relates to a reactive polyurethane hot melt adhesive and a preparation method thereof, belonging to the field of chemistry. Background technique [0002] In recent years, as people pay more and more attention to environmental protection, environmentally friendly products have received more and more attention. Environmentally friendly adhesives have gradually become the development trend of adhesives in the future due to their advantages such as non-toxic, harmless, non-environmental pollution, and convenient use. [0003] Reactive polyurethane hot melt adhesive (PUR), as a high-performance and environmentally friendly adhesive, meets the needs of more and more attention to the environment at home and abroad. PUR rubber has been favored since it was successfully developed more than 20 years ago, and has been more and more developed in industrial countries such as Europe, America and Japan. Although PUR glue is still in its infancy in Chi...

Claims

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Application Information

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IPC IPC(8): C09J175/06C09J175/08C09J157/02C09J145/00C08G18/54C08G18/48C08G18/42
Inventor 姜贵琳王建斌陈田安解海华
Owner YANTAI DARBOND TECH
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