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Preparation method and use of moisture-curable polyurethane hot melt adhesive for special-shaped material coating

A technology of polyurethane hot-melt adhesives and profiled materials, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve problems such as high operating costs, large equipment investment, and unsuitable for sustainable development, and achieve Good initial adhesion, lower production cost, high cohesive energy

Active Publication Date: 2015-04-08
高鼎精细化工(昆山)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the door and window frames are exposed outdoors. In order to prolong their service life, the existing technology mainly covers the surface properly. In the prior art, cold glue is often used for the coating and lamination of profiled materials, and the cold glue is a two-component Polyurethane glue must be mixed according to the proportion before use. After being coated on the film substrate, it is dried in the oven and then coated with the profiled material. The preparation process of the cold glue needs to go through the drying process, and the equipment investment is large. , high operating costs, especially in the current situation of global warming, climate anomalies, and energy shortages, which do not conform to the concept of sustainable development. Therefore, an alternative colloid and preparation process is urgently needed

Method used

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  • Preparation method and use of moisture-curable polyurethane hot melt adhesive for special-shaped material coating
  • Preparation method and use of moisture-curable polyurethane hot melt adhesive for special-shaped material coating
  • Preparation method and use of moisture-curable polyurethane hot melt adhesive for special-shaped material coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Such as figure 1 Shown, the method for preparing polyurethane hot-melt adhesive of the present invention may further comprise the steps:

[0072] Prepare three kinds of polyol esters: polyethylene adipate butylene glycol (molecular weight: 2000-4000), poly-1,6-hexanediol adipate (molecular weight: 3000-8000), polyphthalate Isopentyl glycol diformate (molecular weight 1000-2000), put the above three raw materials into the reactor, and the molar ratio of the three polyol esters is 10:7.46:1, in addition, add lubricant and thickener Resin, wherein, the additive amount of the lubricant is 0.7% of the total weight of the three polyol esters, and the tackifying resin is 15%.

[0073] Heat and melt the raw materials in the polymerization reactor, stir and mix evenly, heat slowly to make the material temperature reach 110-120°C, vacuumize the reactor to reduce the vacuum degree in the reactor to below 50torr, then start dehydration, and continue the negative pressure state for...

Embodiment 2

[0077] This example is roughly the same as Example 1, except that the molar ratio of the three polyol esters is 10:6:1, the amount of lubricant added is 1% of the total weight of the three polyol esters, and the tackifying resin is 20%.

Embodiment 3

[0079] This example is roughly the same as Example 1, except that the molar ratio of the three polyol esters is 10:10:1, the amount of lubricant added is 0.9% of the total weight of the three polyol esters, and the tackifying resin is 18%.

[0080] performance analysis

[0081] figure 2 Shown is the infrared structure spectrogram of the product of embodiment 1, can be seen by spectrogram, and this is the polyurethane finished product after crosslinking, 1724cm -1 There is an obvious sharp peak, which has the main characteristic peak of esters. It is a polyurethane hot melt adhesive suitable for profile coating.

[0082] Table 1 is a statistical table of the analysis data of heat aging resistance properties of the products prepared in Examples 1-3. It can be seen from Table 1 that when the polyurethane hot-melt adhesive of the present invention is used for laminating aluminum profiles and PVC films, the initial adhesion strength is above 1.5Kgf / inch, and the initial adhesio...

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Abstract

The invention discloses a preparation method and a use of a moisture-curable polyurethane hot melt adhesive for special-shaped material coating. The preparation method comprises that a NCO functional group and air or vapor on the base surface undergo a reaction to produce an amido group and simultaneously release CO2, the amido group and other NCO group undergo a reaction to produce a structure with a urea functional group, and reactive hydrogen in the urea structure and unreacted NCO groups undergo further reaction to produce a biuret structure so that a crosslinking reaction is finished, wherein in the reaction, through detection of isocyanate group NCO%, a reaction degree is monitored. The preparation method is free of a solvent and thus a drying process is avoided, processes are simplified and a production cost is reduced. The moisture-curable polyurethane hot melt adhesive obtained by the preparation method has high cohesive energy, good initial adhesion, and excellent heat, water and weather resistance after curing, and is especially suitable for coating of outdoor door and window section bars.

Description

technical field [0001] The invention relates to a preparation method and application of a moisture-curing polyurethane hot-melt adhesive for coating profiled materials, and belongs to the technical field of polymer material preparation. Background technique [0002] There are many kinds of polyurethanes. Polyurethanes with different uses and performance requirements can be prepared according to the types of polyols and diisocyanate basic raw materials, the molecular weight, the difference in structure and functionality, as well as their respective ratios and synthetic routes. Among them, the diisocyanates for preparing polyurethane mainly include TDI, MDI, PAPI, HDIT, etc. Polyols can be divided into two categories: polyether and polyester. Polyurethane synthesized from polyether polyols has excellent weather resistance and frost resistance. Polyurethane synthesized from polyester polyol has excellent mechanical properties, wear resistance and scratch resistance. [0003] M...

Claims

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Application Information

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IPC IPC(8): C09J175/06C09J11/06C09J11/08C08G18/42C08G63/16C08G63/181
Inventor 林棋灿
Owner 高鼎精细化工(昆山)有限公司
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