A kind of polyurethane adhesive and preparation method thereof

A technology of polyurethane adhesive and coupling agent, applied in the direction of polyurea/polyurethane adhesive, adhesive, adhesive type, etc., can solve the problems of low bonding strength, unstable quality, endangering the health of consumers, etc. Achieve good peel strength, overcome quality instability, and reduce processing and coating costs

Active Publication Date: 2021-02-26
SUN YAT SEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic retort-resistant composite film flexible packaging mostly uses two-component solvent-based polyurethane adhesives to bond flexible packaging composite film materials. Domestic polyurethane adhesives have disadvantages such as unstable quality and low bonding strength, and they mainly rely on imports.
However, organic solvents in the production process of solvent-based polyurethane adhesives will not only pollute the air and endanger the health of workers, but also a small amount of solvents will remain in the packaging bags and eventually migrate into food, endangering the health of consumers

Method used

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  • A kind of polyurethane adhesive and preparation method thereof
  • A kind of polyurethane adhesive and preparation method thereof
  • A kind of polyurethane adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The polyurethane adhesive provided in this embodiment includes component A and component B, wherein component A is a polyurethane prepolymer terminated by isocyanate groups, component B is a polyol compound terminated by hydroxyl groups, and in component A, the isocyanate group and the group The molar ratio of hydroxyl groups in Part B is 1.7:1, where:

[0048] Component A is mainly made of the following raw materials in parts by mass:

[0049] Oligomer resin a: 60

[0050] Polyisocyanate: 105

[0051] oligomer polyol: 20;

[0052] Component B is mainly made of the following raw materials in parts by mass:

[0053] Oligomer resin b: 150

[0054] Polyisocyanate: 5.5

[0055] Hyperbranched polymer: 5.0

[0056] Nanomaterials: 0.5

[0057] Coupling agent: 1.0

[0058] Defoamer: 0.2

[0059] Leveling agent: 0.05;

[0060] Wherein the oligomer resin a and oligomer resin b are prepared by reacting small molecular polybasic acid and small molecular polyol through pol...

Embodiment 2

[0078] The polyurethane adhesive provided in this embodiment includes component A and component B, wherein component A is a polyurethane prepolymer terminated by isocyanate groups, component B is a polyol compound terminated by hydroxyl groups, and in component A, the isocyanate group and the group The molar ratio of hydroxyl groups in Part B is 1.9:1, where:

[0079] Component A is mainly made of the following raw materials in parts by mass:

[0080] Oligomer resin a: 70

[0081] Polyisocyanate: 85

[0082] oligomer polyol: 25;

[0083] Component B is mainly made of the following raw materials in parts by mass:

[0084] Oligomer resin b: 130

[0085] Polyisocyanate: 10

[0086] Hyperbranched polymer: 4.0

[0087] Nanomaterials: 0.7

[0088] Coupling agent: 0.8

[0089] Defoamer: 0.4

[0090] Leveling agent: 0.1;

[0091] Wherein the oligomer resin a and oligomer resin b are prepared by reacting small molecular polybasic acid and small molecular polyol through polyes...

Embodiment 3

[0107] The polyurethane adhesive provided in this embodiment includes component A and component B, wherein component A is a polyurethane prepolymer terminated by isocyanate groups, component B is a polyol compound terminated by hydroxyl groups, and in component A, the isocyanate group and the group The molar ratio of hydroxyl groups in Part B is 2.0:1, where:

[0108] Component A is mainly made of the following raw materials in parts by mass:

[0109] Oligomer resin a: 80

[0110] Polyisocyanate: 135

[0111] oligomer polyol: 25;

[0112] Component B is mainly made of the following raw materials in parts by mass:

[0113] Oligomer resin b: 140

[0114] Polyisocyanate: 7

[0115] Hyperbranched polymer: 3.0

[0116] Nanomaterials: 0.8

[0117] Coupling agent: 0.7

[0118] Defoamer: 00.5

[0119] Leveling agent: 0.2;

[0120] Wherein the oligomer resin a and oligomer resin b are prepared by reacting small molecular polybasic acid and small molecular polyol through polye...

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Abstract

The invention discloses a polyurethane adhesive which comprises a component A and a component B, wherein the component A is an isocyanate terminated polyurethane prepolymer; the component B is a hydroxyl-terminated polyhydroxy compound; a molar ratio n(NCO) / n(OH) of the isocyanate (NCO) in the component A to the hydroxyl (OH) in the component B is equal to (1.5-2.5):1; the component A is mainly prepared from the following raw materials in parts by mass: oligomer resins a, polyisocyanates and oligomeric polyols; the component B is mainly prepared from the following raw materials in parts by mass: oligomer resins b, polyisocyanates, hyperbranched polymers, a nanometer material, a coupling agent, an antifoaming agent and a flatting agent; and the oligomer resins a and the oligomer resins b are prepared by carrying out a polyester reaction on small-molecule polybasic acids and small-molecule polyhydric alcohols. The adhesive is green, environment-friendly and safe and is capable of being resistant to high-temperature digestion. The invention further discloses a preparation method of the polyurethane adhesive.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to a polyurethane adhesive and a preparation method thereof. Background technique [0002] In recent years, with the improvement of people's living standards and the great enrichment of material life, everyone's requirements for the tip of the tongue are getting higher and higher, and food is becoming more and more diversified and high-end. Especially for the market's demand for high-end cooked food such as fish and meat, traditional composite film flexible packaging cannot meet its needs for cooking and quality preservation. High-temperature retort bags are highly sought after by the market due to their small size, light weight, convenient eating, long shelf life and ability to pack all kinds of meat products. In recent years, the high-temperature retort bag has grown at an annual rate of more than 15%, and has a very broad market prospect. [0003] The core technol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/04C09J11/04
CPCC08K2003/2227C08K2003/2241C08K2201/011C09J11/04C09J175/04C08K3/042C08K3/36C08K3/22C08K3/346
Inventor 侯高明陈志国章明秋陈育城阮文红林秋云
Owner SUN YAT SEN UNIV
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