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High-heat-resistance polyurethane adhesive and preparation method thereof

A polyurethane adhesive, high heat resistance technology, used in polyurea/polyurethane adhesives, adhesives, adhesive additives, etc., can solve the problem of reduced flame retardancy, poor heat resistance of polyurethane adhesives, and adhesive melting point It can reduce the problems such as decrease, and achieve the effect of increasing flame retardancy, improving adhesion and flame retardancy, and improving strength.

Pending Publication Date: 2021-11-02
深圳市安伯斯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing polyurethane adhesives have poor heat resistance and are easily melted at high temperatures after curing. At the same time, due to the addition of too many chemicals in the adhesive, the melting point of the adhesive decreases and the flame retardancy decreases. Therefore, A high heat-resistant polyurethane adhesive is needed to improve the deficiencies of the prior art

Method used

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  • High-heat-resistance polyurethane adhesive and preparation method thereof
  • High-heat-resistance polyurethane adhesive and preparation method thereof
  • High-heat-resistance polyurethane adhesive and preparation method thereof

Examples

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Embodiment 1

[0026] Embodiment 1 A kind of high heat-resistant polyurethane adhesive and preparation method thereof, comprising:

[0027] 1. Add polybutylene oxalate diol into the reaction kettle, heat at 110-130°C, and vacuum dehydrate;

[0028] 2. Then add diisocyanate and stir, and add 0.1-3 parts of catalyst for prepolymerization to obtain polyurethane prepolymer, wherein the temperature is 90-110°C, and the rotation speed is 200-220r / min;

[0029] 3. Add 130 parts of polyurethane prepolymer, 20 parts of copolymer resin, 12 parts of filler, 1 part of heat-resistant agent and 2 parts of dispersant into the reaction kettle. After stirring rapidly, perform vacuum defoaming, then stop stirring, and add extrusion Extrude into granules in the machine, where the heating temperature is 100-120°C, and the rotation speed is 500-600r / min;

[0030] 4. Add the masterbatch to 40 parts of the solvent, and dissolve to prepare the polyurethane adhesive.

Embodiment 2

[0031] Embodiment 2 A kind of high heat-resistant polyurethane adhesive and preparation method thereof, comprising:

[0032] 1. Add polybutylene oxalate diol into the reaction kettle, heat at 110-130°C, and vacuum dehydrate;

[0033] 2. Then add diisocyanate and stir, and add 0.1-3 parts of catalyst for prepolymerization to obtain polyurethane prepolymer, wherein the temperature is 90-110°C, and the rotation speed is 200-220r / min;

[0034] 3. Add 125 parts of polyurethane prepolymer, 22.5 parts of copolymer resin, 13 parts of filler, 2 parts of heat-resistant agent and 2 parts of dispersant into the reaction kettle. After stirring rapidly, perform vacuum defoaming, then stop stirring, and add extrusion Extrude into granules in the machine, where the heating temperature is 100-120°C, and the rotation speed is 500-600r / min;

[0035] 4. Add the masterbatch to 40 parts of the solvent, and dissolve to prepare the polyurethane adhesive.

Embodiment 3

[0036] Embodiment 3 A kind of high heat-resistant polyurethane adhesive and preparation method thereof, comprising:

[0037] 1. Add polybutylene oxalate diol into the reaction kettle, heat at 110-130°C, and vacuum dehydrate;

[0038] 2. Then add diisocyanate and stir, and add 0.1-3 parts of catalyst for prepolymerization to obtain polyurethane prepolymer, wherein the temperature is 90-110°C, and the rotation speed is 200-220r / min;

[0039] 3. Add 120 parts of polyurethane prepolymer, 25 parts of copolymer resin, 15 parts of filler, 3 parts of heat-resistant agent and 2 parts of dispersant into the reaction kettle. Extrude into granules in the machine, where the heating temperature is 100-120°C, and the rotation speed is 500-600r / min;

[0040] 4. Add the masterbatch to 40 parts of the solvent, and dissolve to prepare the polyurethane adhesive.

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Abstract

The invention relates to the technical field of polyurethane adhesives, in particular to a high-heat-resistance polyurethane adhesive and a preparation method thereof. The high-heat-resistance polyurethane adhesive is prepared from the following raw materials: a polyurethane prepolymer, copolymer resin, a filling agent, a heat-resistant agent, a solvent, a catalyst and a dispersing agent, the heat-resistant agent is added, due to the addition of the phosphorus additive, the adhesive can generate a flame-retardant carbonized layer when being heated, the strength of the adhesive can be improved by adding the filler, and meanwhile, due to the addition of various oxides, the flame retardance of the adhesive is also greatly improved; the metal oxide in the filling agent reacts with the heat-resistant agent rich in a large amount of phosphoric acid elements to produce a product with acidified phosphorus oxide, the product can be used for acidifying copolymer resin and producing phosphoric acid modified copolymer resin, the modified resin and the prepolymer have good fusion force, the adhesive force and the flame retardance of the adhesive are further improved.

Description

technical field [0001] The invention relates to the technical field of polyurethane adhesives, in particular to a high heat-resistant polyurethane adhesive and a preparation method thereof. Background technique [0002] Polyurethane adhesive is an important part of the rapidly developing polyurethane resin. It has excellent performance and has been widely used in many aspects. It is one of the important varieties among the eight synthetic adhesives. Polyurethane adhesive has excellent shear resistance Shear strength and impact resistance, suitable for various structural bonding fields, and has excellent flexibility, not only strong adhesion, but also excellent cushioning and shock absorption functions, low temperature and ultra-low temperature of polyurethane adhesives Outperforming all other types of adhesives, thermoplastic polyurethane adhesives are synthetic polyurethane adhesives made from thermoplastic polyurethane that soften the bond when heated and harden to gain st...

Claims

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Application Information

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IPC IPC(8): C09J175/06C09J163/00C09J133/00C09J193/04C09J161/06C09J145/00C09J157/02C09J11/04C09J11/06
CPCC09J175/06C09J11/04C09J11/06C08K2003/2227C08K2003/2241C08K2003/2265C08L2201/02C08L2201/08C08L63/00C08L33/00C08L93/04C08L61/06C08L45/00C08L57/02C08K3/22C08K3/34C08K3/36C08K3/08C08K5/5397C08K5/521C08K5/523
Inventor 范坤泉
Owner 深圳市安伯斯科技有限公司