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A kind of latent one-component polyurethane hot-melt adhesive and its preparation method and adhesive film

A polyurethane hot melt adhesive, one-component technology, applied in the direction of polyurea/polyurethane adhesive, heat-activated film/sheet, adhesive, etc., can solve the problems of limited application and harsh storage conditions, and achieve low cost and high production efficiency High, simple process effect

Active Publication Date: 2021-10-12
GUANGDONG YETOM NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its reactive isocyanate (-NCO) group, the storage conditions are harsh (low temperature, moisture insulation, and vacuum storage in general), and post-curing takes 3-7 days, which limits its use in some rapid use fields Applications

Method used

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  • A kind of latent one-component polyurethane hot-melt adhesive and its preparation method and adhesive film
  • A kind of latent one-component polyurethane hot-melt adhesive and its preparation method and adhesive film
  • A kind of latent one-component polyurethane hot-melt adhesive and its preparation method and adhesive film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043]A latent one-component polyurethane hot-melt adhesive, comprising the following components by weight percentage:

[0044]

[0045] The preparation method of above-mentioned latent one-component polyurethane hot-melt adhesive comprises the following steps:

[0046] Water-based polyurethane resin U42, water-based polyurethane resin U58, closed curing agent 2794 (NCO group content is 11.5%, unblocking temperature 105 ° C), closed curing agent B1358 / 100 (NCO group content is 12.5%, unblocking temperature Temperature 130°C), dibutyltin dilaurate, antioxidant 1010, and ultraviolet absorber UV-328 were put into the reaction kettle, and mixed evenly at a low speed at a stirring speed of 100rpm to obtain a latent one-component polyurethane hot melt adhesive.

[0047] An adhesive film is obtained by curing the latent one-component polyurethane hot melt adhesive.

[0048] Specifically, a latent one-component polyurethane hot-melt adhesive was added into a coating machine, and c...

Embodiment 2

[0050] A latent one-component polyurethane hot-melt adhesive, comprising the following components by weight percentage:

[0051]

[0052] The preparation method of above-mentioned latent one-component polyurethane hot-melt adhesive comprises the following steps:

[0053] Put water-based polyurethane resin U2849, water-based polyurethane resin U58, closed curing agent B1358 / 100 (NCO group content is 12.5%, unblocking temperature 130 ℃), stannous octoate, antioxidant 1010, ultraviolet absorber UV-5411 into Into the reaction kettle, mix evenly at a low speed at a stirring speed of 50rpm, and obtain a latent one-component polyurethane hot melt adhesive.

[0054] An adhesive film is obtained by curing the latent one-component polyurethane hot melt adhesive.

[0055] Specifically, a latent one-component polyurethane hot-melt adhesive was added into a coating machine, and coated on glassine paper with a thickness of 0.1 mm by a scraper of a coating head to obtain an adhesive film...

Embodiment 3

[0057] A latent one-component polyurethane hot-melt adhesive, comprising the following components by weight percentage:

[0058]

[0059] The preparation method of above-mentioned latent one-component polyurethane hot-melt adhesive comprises the following steps:

[0060] Solvent-based polyurethane resin CX6049, solvent-based polyurethane resin 2550, blocked curing agent B1358 / 100 (NCO group content is 12.5%, unblocking temperature 130 ° C), triethylenediamine, antioxidant 168, ultraviolet absorber UV -9 was put into the reaction kettle, and mixed evenly at a low speed at a stirring speed of 100rpm to obtain a latent one-component polyurethane hot melt adhesive.

[0061] An adhesive film is obtained by curing the latent one-component polyurethane hot melt adhesive.

[0062] Specifically, a latent one-component polyurethane hot-melt adhesive was added into a coating machine, and coated on glassine paper with a thickness of 0.05 mm by a scraper of a coating head to obtain an ...

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Abstract

The invention relates to the field of polymer adhesives, in particular to a latent single-component polyurethane hot-melt adhesive and a preparation method and adhesive film thereof. The latent one-component polyurethane hot melt adhesive of the present invention comprises the following components by weight percentage: polyurethane resin 70%-95%; closed curing agent 4.8%-29.3%; accelerator 0.01%-0.2%; agent 0.01%-0.5%. The latent type one-component polyurethane hot-melt adhesive of the present invention has good bonding strength, heat resistance, hydrolysis resistance and other properties; the preparation method is simple in process, low in cost, high in preparation efficiency, and has prospects in industrial production; The latent one-component polyurethane film obtained by curing one-component polyurethane hot melt adhesive has good initial tack, excellent final tack and storage stability; it can be widely used in woodworking, textile, outdoor clothing, automobile, electronics, Appliances and other industries.

Description

technical field [0001] The invention relates to the field of polymer adhesives, in particular to a latent one-component polyurethane hot-melt adhesive, a preparation method and an adhesive film thereof. Background technique [0002] Polyurethane is a rapidly developing multifunctional polymer synthetic material. Due to the variety of raw materials and the adjustability of molecular structure, it can be made into various products such as foam plastics, elastomers, coatings, and hot melt adhesives. Its uses extremely broad. In addition, by adjusting the raw materials and formulations of polyurethane, various types of polyurethane hot melt adhesives suitable for bonding between various materials and for various purposes can be designed. Polyurethane hot melt adhesive has excellent flexibility, impact resistance, chemical resistance, and has particularly excellent low temperature resistance and abrasion resistance. [0003] Polyurethane hot melt adhesives can be divided into t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/04C09J11/06C09J7/10C09J7/35
CPCC08L2201/08C08L2205/025C09J11/06C09J175/04C09J7/10C09J7/35C08L75/04C08K5/1345C08K5/526C08K5/3475C08K5/132C08K5/29
Inventor 梁坤焕欧阳效明梁锋
Owner GUANGDONG YETOM NEW MATERIALS CO LTD
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