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High-temperature cooking type medium-resistant solvent-free double-component polyurethane adhesive and preparation method thereof

A two-component polyurethane, high-temperature cooking technology, applied in the technical field of C08G18/42, can solve the problems of not being able to catch up with the development of solvent-free polyurethane laminating adhesive, limited scope of application, production efficiency, and uneven drying of laminating adhesive. , to improve hydrophobicity and solvent resistance, reduce VOC emissions, improve hydrolysis resistance and high temperature resistance

Pending Publication Date: 2022-07-15
上海都昱新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN108559440A discloses a solvent-free polyurethane laminating adhesive whose rapid curing is reduced to 12 hours, but the curing speed is too fast, which may easily lead to the problem of uneven drying of the laminating adhesive
Although water-based polyurethane laminating adhesives have made great progress in technology and performance, they are limited to factors such as scope of application and production efficiency, and cannot catch up with the development of solvent-free polyurethane laminating adhesives in a short period of time.

Method used

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  • High-temperature cooking type medium-resistant solvent-free double-component polyurethane adhesive and preparation method thereof

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Embodiment 1

[0044] The present embodiment proposes a high-temperature cooking type medium-resistance solvent-free two-component polyurethane adhesive and a preparation method, wherein the A component includes, by weight, 60 kg of diphenylmethane diisocyanate, 14 kg of polycaprolactone polyol, 26kg of polycarbonate diol; B component by weight, including 60kg of dimer acid modified polyester polyol, 7kg of isocyanate, 3kg of chain extender, 1kg of leveling agent, 0.05kg of catalyst, 30kg Polycarbonate diol.

[0045] The molecular weight of the polycarbonate diol in the A component is 500, and the molecular weight of the polycaprolactone polyol is 1000.

[0046] The isocyanate in the B component is carbodiimide-modified diphenylmethane diisocyanate, the chain extender is neopentyl glycol, the leveling agent is an acrylate compound, and the catalyst is bismuth neodecanoate; polycarbonate; The molecular weight of the diol is 500.

[0047] The preparation method is as follows:

[0048] Compo...

Embodiment 2

[0059] This embodiment proposes a high-temperature cooking type medium-resistance solvent-free two-component polyurethane adhesive and a preparation method, wherein the A component includes, by weight, 40 kg of diphenylmethane diisocyanate and 15 kg of carbodiimide-modified diisocyanate. Phenylmethane diisocyanate, 16 kg of polycaprolactone polyol, 29 kg of polycarbonate diol; component B, by weight, includes 58 kg of dimer acid-modified polyester polyol, 5 kg of isocyanate, 3 kg of expanded Chain agent, 0.5kg leveling agent, 0.05kg catalyst, 34kg polycarbonate diol.

[0060] The molecular weight of the polycarbonate diol in the A component is 1000, and the molecular weight of the polycaprolactone polyol is 1000.

[0061] The isocyanate in the B component is carbodiimide-modified diphenylmethane diisocyanate, the chain extender is neopentyl glycol, the leveling agent is an acrylate compound, and the catalyst is zinc neodecanoate; polycarbonate; The molecular weight of the dio...

Embodiment 3

[0074] This embodiment proposes a high-temperature cooking type medium-resistance solvent-free two-component polyurethane adhesive and a preparation method, wherein the A component, by weight, includes 51 kg of diphenylmethane diisocyanate, 6 kg of isophorone diisocyanate, 10kg of polycaprolactone polyol, 33kg of polycarbonate diol; B component by weight, including 60kg of dimer acid modified polyester polyol, 6kg of isocyanate, 4kg of chain extender, 0.5kg of Leveling agent, 0.05 kg of catalyst, 30 kg of polycarbonate diol.

[0075] The polycarbonate diol in the A component includes a compound material of polycarbonate diol with a molecular weight of 500 and a molecular weight of 1000, the mass ratio is 5:6, and the molecular weight of the polycaprolactone polyol is 2000.

[0076] The isocyanate in the B component is carbodiimide-modified diphenylmethane diisocyanate, the chain extender is diethylene glycol, the leveling agent is an acrylate compound, and the polycarbonate di...

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Abstract

The invention provides a high-temperature cooking type medium-resistant solvent-free double-component polyurethane adhesive and a preparation method thereof. The high-temperature cooking type medium-resistant solvent-free double-component polyurethane adhesive comprises a component A, a component B, a component C and a component D, wherein the component A comprises polycarbonate diol, polycaprolactone polyol and non-aliphatic isocyanate; the component B comprises dimer acid modified polyester polyol, polycarbonate diol, a chain extender, isocyanate and a component C, and the component C comprises a flatting agent and a catalyst. The prepared two-component polyurethane adhesive has good hydrolysis resistance, high temperature resistance, fluidity, hydrophobicity, solvent resistance and bonding strength, does not use raw materials with obvious smell, is small in smell, is very suitable for being used as a laminating adhesive in food packaging, is suitable for an aluminum-plastic composite base material, and is also suitable for being used as a film laminating adhesive in food packaging. And the method is also suitable for most soft package common base materials used at present.

Description

technical field [0001] The invention relates to the technical field of C08G18 / 42, belongs to the field of chemical adhesives, and more particularly relates to a high-temperature cooking type medium-resistance solvent-free two-component polyurethane adhesive and a preparation method. Background technique [0002] Polyurethane laminating adhesive is mainly used in flexible packaging such as food, medicine, detergent, etc. It has the characteristics of softness, strong adhesion and wide applicability, and through flexible formula design and raw material selection, oil resistance, acid resistance, high temperature resistance can be obtained. and other special properties. In foreign countries, solvent-free polyurethane laminating adhesive has accounted for more than 50% of the market share, and the mainstream product in my country's market is still solvent-based polyurethane laminating adhesive. Solvent-free polyurethane laminating adhesive started in 1995 and developed slowly a...

Claims

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Application Information

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IPC IPC(8): C09J175/06C08G18/66C08G18/42C08G18/44C08G18/32
CPCC09J175/06C08G18/4277C08G18/4238C08G18/44C08G18/4202C08G18/664
Inventor 贾玉波朱啊啦杨丽燕
Owner 上海都昱新材料科技有限公司
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