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Solvent-free single-component polyurethane adhesive and preparation method thereof

A polyurethane adhesive, solvent-free technology, applied in the field of adhesive manufacturing, can solve the problems of short storage period, long adhesive curing time, low efficiency, etc., and achieve the effect of high bonding strength

Inactive Publication Date: 2015-07-29
CHANGCHUN YINGLONG MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The curing mechanism of the moisture-curing one-component polyurethane adhesive is to realize the bonding effect through the reaction of isocyanate and water to form a cross-linked network, but the adhesives currently used have long curing time, short storage period and low efficiency.

Method used

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Examples

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with specific examples.

[0014] Example 1: Take 560g of 2,4-toluene diisocyanate (TDI), put it into a 1000ml three-neck flask with stirring, temperature control and feeding device, add 4‰ tin acetylacetonate catalyst, and adjust the pH of the reaction system with phosphoric acid value to 5.2. Heat to 60°C, start to add 240g of polyol (210A) dropwise, finish dropping within 30 minutes, keep the temperature after dropwise addition, continue to react for 2 hours, cool down to 40°C, filter to obtain a solvent-free one-component polyurethane adhesive , No. A1.

[0015] Example 2: Take 640g of 2,4-diphenylmethane diisocyanate (2,4-MDI) and add it to the same three-necked flask as in Example 1, add 0.2‰ nickel acetylacetonate catalyst, and adjust the reaction system with phosphoric acid PH value to 5.5. Heat to 60°C, start to add 160g of polyol (210A) dropwise, finish dropping within 30 minute...

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PUM

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Abstract

The invention relates to a solvent-free single-component polyurethane adhesive and a preparation method thereof. The adhesive comprises the following raw materials in percent by weight: 70-85% of isocyanate, 15-30% of polyhydric alcohols, and a catalyst of which the weight is 0.02%-0.06% of the total weight of the isocyanate and the polyhydric alcohols. The adhesive provided by the invention belongs to a wet-cured type polyurethane adhesive, the storage life is longer than 6 months, the opening time is longer than 24 hours, the curing time is short as the adhesive can be quickly cured within 30 seconds when encountering water at the temperature of 120-130 DEG C, and the bonding strength is high. The adhesive is used for hot-pressing adhesion among polyurethane foam, glass fiber cloth and non-woven fabric during the manufacture of automobile mould pressing roof, the hot-pressing temperature is 120-130 DEG C, the curing time is 20-30s and the bonding strength is 15-20N.

Description

technical field [0001] The invention relates to a solvent-free one-component polyurethane adhesive and a preparation method thereof, belonging to the field of adhesive manufacturing. Background technique [0002] The curing mechanism of the moisture-curing one-component polyurethane adhesive is to realize the bonding effect through the reaction of isocyanate and water to form a cross-linked network, but the adhesives currently used have long curing time, short storage period and low efficiency. There is an urgent need for an adhesive that not only has a long shelf life and an open time, but also can quickly cure in a short time. Contents of the invention [0003] The object of the present invention is to provide a solvent-free one-component polyurethane adhesive with a long storage period, a long open time and a short curing time and a preparation method thereof in order to overcome the above-mentioned defects in the prior art. The invention provides a solvent-free one-co...

Claims

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Application Information

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IPC IPC(8): C09J175/08C08G18/48
Inventor 崔瑛娜张龙王仲举张冠群
Owner CHANGCHUN YINGLONG MATERIAL TECH CO LTD
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