Preparation method of polyurethane adhesive

A technology of polyurethane adhesives and catalysts, which is applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., and can solve the problems of limited application, poor heat resistance, antistatic and water resistance, and low strength of water-based polyurethane adhesives. , to achieve the effects of easy peeling, excellent antistatic performance, long-term hydrolysis resistance and stability

Pending Publication Date: 2021-02-12
ICLOUD ADVANCED MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength of water-based polyurethane adhesive products is not high, and the performance of heat resistance, antistatic and water resistance is poor, which limits its further application.

Method used

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  • Preparation method of polyurethane adhesive
  • Preparation method of polyurethane adhesive
  • Preparation method of polyurethane adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]Weigh 100g of caprolactone and 10g of MDP in a three-necked flask, stir and add 0.5g of stannous isooctanoate, carry out ring-opening polymerization at 120°C for 4 hours, cool the reaction mixture to room temperature, and then dissolve in Methyl chloride (100 mL). Pour the obtained product into an excess of n-hexane and ether mixed solution (2 / 1, v / v) and centrifuge for three times. The precipitate is dried in a vacuum drying oven at 50°C for 24 hours. The precipitate is the hydroxyl-terminated product. Polycaprolactone has a molecular weight of 2000. Weigh a certain mass of hydroxyl-terminated polycaprolactone, add 10 parts of modifier by mass; 1 part of defoamer; 0.5 part of antioxidant; 1wt% of antistatic agent, fully stirred until uniform The main agent of polyurethane adhesive.

[0034]Weigh isophorone diisocyanate (IPDI, 2223g; 10mol), place it in the reactor and heat it to 80°C, add polypropylene glycol (PPG, MW=1000; 1000g, 1mol) within 4 hours, and keep the temperature a...

Embodiment 2

[0037]Weigh 100g of caprolactone and 10g of MDP in a three-necked flask, stir and add 0.5g of stannous isooctanoate, carry out ring-opening polymerization at 120°C for 4 hours, cool the reaction mixture to room temperature, and then dissolve in Methyl chloride (100 mL). Pour the obtained product into an excess of n-hexane and ether mixed solution (2 / 1, v / v) and centrifuge for three times. The precipitate is dried in a vacuum drying oven at 50°C for 24 hours. The precipitate is the hydroxyl-terminated product. Polycaprolactone has a molecular weight of 2000. Weigh a certain mass of hydroxyl-terminated polycaprolactone, add 10-12 parts of modifier; 1-2 parts of defoamer; 0.5-1 part of antioxidant; 0.5-2wt% of antistatic After mixing thoroughly until uniform, the polyurethane adhesive main agent one is obtained.

[0038]Weigh isophorone diisocyanate (IPDI, 1333.8g; 6mol), place it in the reactor and heat it to 90°C, add polypropylene glycol (PPG, MW=1000; 1000g, 1mol) within 3 hours, and ...

Embodiment 3

[0041]Weigh 100g of caprolactone and 10g of MDP in a three-necked flask, stir and add 0.5g of stannous isooctanoate, carry out ring-opening polymerization at 120°C for 4 hours, cool the reaction mixture to room temperature, and then dissolve in Methyl chloride (100 mL). Pour the obtained product into an excess of n-hexane and ether mixed solution (2 / 1, v / v) and centrifuge for three times. The precipitate is dried in a vacuum drying oven at 50°C for 24 hours. The precipitate is the hydroxyl-terminated product. Polycaprolactone has a molecular weight of 2000. Weigh a certain mass of hydroxyl-terminated polycaprolactone, add 10-12 parts of modifier; 1-2 parts of defoamer; 0.5-1 part of antioxidant; 0.5-2wt% of antistatic After mixing thoroughly until uniform, the polyurethane adhesive main agent one is obtained.

[0042]Weigh isophorone diisocyanate (IPDI, 1333.8g; 10mol), place it in the reactor and heat it to 85°C, mix 2g of dibutyltin dilaurate catalyst into polypropylene glycol, and a...

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Abstract

The invention discloses a polyurethane adhesive with low stripping force, the polyurethane adhesive comprises a polyurethane adhesive main agent, a curing agent and an auxiliary additive, the polyurethane adhesive main agent is a hydroxyl (-OH) terminated prepolymer obtained by monomer modified polyol; the curing agent is an isocyanate group (-NCO) terminated prepolymer obtained by reacting diisocyanate with polyhydric alcohol; monoamino fluorine-containing polyhedral oligomeric silsesquioxane (POSS) is introduced, and POSS is used for reducing the stripping force of the polyurethane adhesive;the auxiliary additive is composed of a catalyst, an antifoaming agent, an antistatic agent, an antioxidant and a chain extender; the polyurethane adhesive main agent, the curing agent and the auxiliary additive are mixed according to a certain ratio and uniformly stirred and then the mixture is used for coating to form a film; and the prepared adhesive film has the advantages of high exhaust speed, small stripping force, no bubbles after aging, no white spots, high temperature resistance, no residual adhesive and yellowing resistance, and good antistatic performance and the like.

Description

Technical field[0001]The invention belongs to the field of oily polyurethane adhesives, and specifically relates to a preparation method of a polyurethane adhesive.Background technique[0002]The two-component polyurethane adhesive has a wide choice of raw materials, a wide range of formulas, a wide range of varieties, and a wide range of performance changes; the cured product has good water resistance, oil resistance, solvent resistance, chemical resistance, ozone resistance, and bacteria resistance; various curing conditions can be at room temperature , High temperature; Contains polar groups such as urethane group, ether group, urea group, etc. The adhesive has strong adhesion, suitable for a variety of substrates, and is used in electronics, packaging, leather, textiles and other fields. Waterborne polyurethane has the characteristics of high elasticity and environmental friendliness and is widely used in many industrial fields. However, water-based polyurethane adhesive products ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C09J11/06C08G18/75C08G18/66C08G18/42C08G18/61C08G18/32
CPCC09J175/06C09J11/06C08G18/755C08G18/664C08G18/4277C08G18/61C08G18/3206C08L2201/08C08L2201/04C08K5/1345C08K5/526
Inventor 屈小红蒋宽玉赵娟娟
Owner ICLOUD ADVANCED MATERIAL TECH CO LTD
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