Preparation method of moisture-curable polyurethane hot melt adhesive for textile compounding

A polyurethane hot-melt adhesive and moisture-curing technology, which is applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problem that the peel strength and softness cannot be improved at the same time, and achieve strong peel strength and improved Softness, the effect of reducing the Shore hardness

Inactive Publication Date: 2021-01-15
SHANGHAI DONGRUI CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of moisture-curing polyurethane hot-melt adhesive for

Method used

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  • Preparation method of moisture-curable polyurethane hot melt adhesive for textile compounding

Examples

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Embodiment 1

[0032]A preparation method of moisture-curing polyurethane hot melt adhesive for textile composites, including the following steps:

[0033](1) Combine 5.2 parts of polyethylene phthalate glycol (parts by weight, the same below), 11.1 parts of sebacic acid polyester polyol, 12.0 parts of adipic acid polyester polyol and polyether polyol 48.9 parts of polyol mixture, stirred and mixed with 0.05 parts of antioxidant, then heated to 127°C, dehydrated for 70 minutes under vacuum ≤100Pa;

[0034](2) Cool down to 75°C, add 21.75 parts of 4,4'-diphenylmethane diisocyanate (MDI), 0.5 part of catalyst bismorpholinyl diethyl ether, vacuum degree≤100Pa, reaction temperature 85~90℃ Stir and react for 180min under conditions;

[0035](3) Add 0.5 part of trimethylolpropane, a chain extender, and continue to react for 30 minutes under vacuum ≤100Pa and temperature 85~90℃;

[0036](4) The material is quickly discharged under the protection of nitrogen and packaged in an aluminum foil bag, and cured at room tem...

Embodiment 2

[0038]A preparation method of moisture-curing polyurethane hot melt adhesive for textile composites, including the following steps:

[0039](1) Combine 8 parts of phthalic anhydride polyester polyol, 6.5 parts of sebacic acid polyester polyol, 15.6 parts of adipic acid polyester polyol, and 46.9 parts of propylene oxide polyether polyol in parts by mass. Stir and mix 0.05 parts of oxygen agent, heat to 120°C, and dehydrate for 70min under the vacuum degree of less than 100Pa;

[0040](2) Cool down to 80°C, add 22.45 parts of 4,4'-diphenylmethane diisocyanate (MDI), 0.35 parts of catalyst bismorpholinyl diethyl ether, under vacuum ≤100Pa, reaction temperature 85~90℃ Stir and react for 150min under the conditions;

[0041](3) Cool down to 90°C, add 0.5 part of trimethylolpropane, a chain extender, and continue the reaction for 30 minutes at a vacuum degree of less than 100 Pa and a temperature of 100°C;

[0042](4) The material is quickly discharged under the protection of nitrogen and encapsulat...

Embodiment 3

[0044]A method for preparing a moisture-curing polyurethane hot melt adhesive for textile composite, including the following steps:

[0045](1) Combine 7 parts of phthalic anhydride polyester polyol, 12 parts of sebacic acid polyester polyol, 12.6 parts of adipic acid polyester polyol and 40.6 parts of propylene oxide polyether polyol in parts by mass. Stir and mix 0.05 parts of oxygen agent, heat to 120°C, and dehydrate for 70min under the vacuum degree of less than 100Pa;

[0046](2) Cool down to 75°C, add 27.25 parts of 4,4'-diphenylmethane diisocyanate (MDI), 0.4 part of catalyst, and stir and react for 135min under the conditions of vacuum ≤100Pa and reaction temperature of 85-90°C;

[0047](3) Cool down to 90°C, add 0.5 part of trimethylolpropane, a chain extender, and continue the reaction for 30 minutes at a vacuum degree of less than 100 Pa and a temperature of 100°C;

[0048](4) The material is quickly discharged under the protection of nitrogen and encapsulated in an aluminum foil ba...

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Abstract

The invention relates to a preparation method of a moisture-curable polyurethane hot melt adhesive for textile compounding. The preparation method comprises the following steps: stirring and mixing apolyol mixture composed of 5.3-10 parts of phthalic anhydride polyester polyol, 5-13.1 parts of sebacic acid polyester polyol, 12.5-16.6 parts of adipic acid polyester polyol and 24.3-37.9 parts of polyether polyol with 0.03-0.05 part of antioxidant, and carrying out vacuum dehydration; (2) cooling to 75-95 DEG C, adding 14.3-22.7 parts of 4, 4 '-diphenylmethane diisocyanate and 0.3-0.5 part of acatalyst, and stirring for reaction under the conditions that the vacuum degree is less than or equal to 100Pa and the reaction temperature is 85-90 DEG C; (3) adding 0.3-0.5 part of a chain extender,and continuously reacting under the conditions that the vacuum degree is less than or equal to 100Pa and the temperature is 85-90 DEG C; and (4) discharging and sealing, and curing at normal temperature for at least one day to obtain the moisture-curable polyurethane hot melt adhesive for textile compounding.

Description

Technical field[0001]The invention relates to the technical field of preparation and use of flexible polyurethane, in particular to a method for preparing a moisture-curing polyurethane hot melt adhesive for textile composite.Background technique[0002]Moisture curing polyurethane hot melt adhesive is a type of polyurethane prepolymer adhesive containing isocyanate groups as end groups, which can have high bonding strength to substrates containing active hydrogen or water absorption, such as metal, wood, rubber, Fiber, wood, leather, plastic, etc. In use, the hot melt adhesive is heated and melted and applied to the substrate to be bonded. After the adhesive layer is cooled and physically solidified to produce a preliminary adhesive force, the terminal isocyanate groups in the adhesive layer are then combined with moisture in the air or bonded The active hydrogen substance on the surface of the substrate undergoes a chemical reaction, resulting in cross-linking and curing, and finall...

Claims

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Application Information

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IPC IPC(8): C09J175/04C08G18/76C08G18/42C08G18/48C08G18/12C08G18/32
CPCC09J175/04C08G18/4018C08G18/4202C08G18/48C08G18/7671C08G18/12C08G18/3206
Inventor 金敬东
Owner SHANGHAI DONGRUI CHEM
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