Environment-friendly organic silicon modified TPU (Thermoplastic Polyurethane) hot melt adhesive and preparation method thereof

A technology of silicone and hot melt adhesives, applied in adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve problems such as damage to human health, poor adhesive strength, and environmental pollution, and achieve enhanced adhesion , Improve the bonding strength and good compatibility

Inactive Publication Date: 2018-05-04
DONGGUAN XIONGLIN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, it is found in actual production that the current polyurethane hot melt adhesives also have some defects. For example, some polyurethane hot melt adhesives will release toxic chemicals when they are used, pollute the environment and damage human health, and some polyurethane hot melt adhesives are environmentally friendly. Contaminated hot-melt method attaches it to fabrics, shoe materials and bags with poor adhesive strength and high melting point

Method used

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  • Environment-friendly organic silicon modified TPU (Thermoplastic Polyurethane) hot melt adhesive and preparation method thereof
  • Environment-friendly organic silicon modified TPU (Thermoplastic Polyurethane) hot melt adhesive and preparation method thereof
  • Environment-friendly organic silicon modified TPU (Thermoplastic Polyurethane) hot melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In this embodiment 1, the raw materials for the preparation of the organosilicon-modified TPU hot-melt adhesive include the following components by weight:

[0045]

[0046] Wherein, the chain extender is ethylenediamine, the catalyst is stannous octoate, and the antioxidant is antioxidant 1076.

[0047] Its preparation method comprises the following steps:

[0048] (1) Mix polyester polyol, isophorone diisocyanate, hydroxybutyl-terminated polydimethylsiloxane, chain extender, catalyst and antioxidant, stir at 100r / min at 80°C Vacuum dehydration, the pressure during vacuum dehydration is -0.1kPa, and then react at 130°C for 5h;

[0049] (2) The product of step (1) is mixed with acrylic resin, hexaalkoxysilane coupling agent, silicon dioxide and diatomaceous earth, and then extruded by an extruder, the feed of the twin-screw extruder The temperature of the feed section is 120°C, the temperature of the mixing section is 150°C, the temperature of the extrusion section i...

Embodiment 2

[0051] In this embodiment 1, the raw materials for the preparation of the organosilicon-modified TPU hot-melt adhesive include the following components by weight:

[0052]

[0053] Wherein, the chain extender is 1,5-pentanediol, the catalyst is dibutyltin dioctoate, and the antioxidant is antioxidant 1076.

[0054] Its preparation method comprises the following steps:

[0055] (1) Mix polyester polyol, isophorone diisocyanate, hydroxybutyl-terminated polydimethylsiloxane, chain extender, catalyst and antioxidant, stir at 200r / min at 70°C Vacuum dehydration, the pressure during vacuum dehydration is -0.3kPa, and then react at 140°C for 3h;

[0056] (2) The product of step (1) is mixed with acrylic resin, hexaalkoxysilane coupling agent, silicon dioxide and diatomaceous earth, and then extruded by an extruder, the feed of the twin-screw extruder The temperature of the feed section is 130°C, the temperature of the mixing section is 170°C, the temperature of the extrusion sec...

Embodiment 3

[0058] In this embodiment 1, the raw materials for the preparation of the organosilicon-modified TPU hot-melt adhesive include the following components by weight:

[0059]

[0060] Wherein, the chain extender is 1,4-butanediol, the catalyst is dibutyltin lauricate, and the antioxidant is antioxidant 264.

[0061] Its preparation method comprises the following steps:

[0062] (1) Mix polyester polyol, diisocyanate, hydroxybutyl-terminated polydimethylsiloxane, chain extender, catalyst and antioxidant, and dehydrate under vacuum at 70°C under stirring at 150r / min. The pressure during dehydration is -0.2kPa, and then react at 120°C for 8h;

[0063] (2) The product of step (1) is mixed with acrylic resin, hexaalkoxysilane coupling agent, silicon dioxide and diatomaceous earth, and then extruded by an extruder, the feed of the twin-screw extruder The temperature of the material section is 125°C, the temperature of the mixing section is 160°C, the temperature of the extrusion s...

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Abstract

The invention provides an environment-friendly organic silicon modified TPU (Thermoplastic Polyurethane) hot melt adhesive and a preparation method thereof. The organic silicon modified TPU hot melt adhesive is prepared from the following preparation raw materials in parts by weight: 50 to 70 parts of polyester polyol, 30 to 40 parts of diisocyanate, 5 to 10 parts of hydroxyalkyl-terminated polydimethylsiloxane, 10 to 20 parts of hexaalkoxysilane coupling agent, 10 to 20 parts of acrylic resin, 5 to 8 parts of silica, 1 to 5 parts of diatomite, 2 to 8 parts of chain extender, 1 to 5 parts of catalyst and 1 to 6 parts of antioxidant. The organic silicon modified TPU hot melt adhesive provided by the invention has apparent viscosity which is 5,100MPa.s to 5,800MPa.s, high viscosity and peelstrength which is 52N/2.5cm<2> to 58N/2.5cm<2>, and has favorable bonding strength, moderate hardness, melting point which is 71 to 80 DEG C and low melting point, moreover, cannot release a harmful component in a use process, and is safe and environmentally friendly.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to an environment-friendly organic silicon modified TPU hot melt adhesive and a preparation method thereof. Background technique [0002] Polyurethane hot-melt adhesive film has the advantages of convenient positioning and high peel strength. It is a hot-melt adhesive with excellent adhesion and sealing performance. It has developed rapidly at home and abroad in recent years. Polyurethane hot melt adhesive films mainly include two categories, one is linear and slightly cross-linked thermoplastic polyurethane hot melt adhesive films, and the other is reactive polyurethane hot melt adhesive films. The hot melt adhesive film should have the characteristics of high adhesive strength, high cohesive strength, convenient construction, and moderate melting point / sizing temperature. [0003] However, it is found in actual production that the current polyurethane hot melt adhesives also have s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C09J175/04C09J133/04C09J11/04C09J11/06C08G18/66C08G18/61C08G18/42C08G18/32
CPCC08G18/3206C08G18/3228C08G18/4009C08G18/42C08G18/61C08G18/664C08G18/6651C08L2205/02C08L2205/03C09J11/04C09J11/06C09J175/06C08L75/04C08L33/04C08K3/36C08K3/34
Inventor 杨博何建雄王一良
Owner DONGGUAN XIONGLIN NEW MATERIAL TECH
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