Novel hot melt adhesive and preparation method thereof

A hot-melt adhesive, a new type of technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problems of unfavorable large-scale application, low interface bonding strength, and low bonding strength, and achieve Suitable for large-scale industrial production, good bonding effect, and low hot pressing temperature

Active Publication Date: 2016-07-06
SHANGHAI TIANYANG HOT MELT ADHESIVE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the structural difference between metal and plastic, the properties of the two materials are very different, resulting in low interface bonding strength, easy to degumming, and in the bonding process, the bonded materials are easily damaged and deformed
Patent CN103770414A discloses an emulsion-type polyacrylic adhesive for bonding ABS plastics and aluminum foil. A double-layer composite hot-melt adhesive film for bonding metal materials such as aluminum and stainless steel to plastics such as ABS, PVC, and PET has been developed. Although the adhesive film has a good bonding effect on metal and plastic, the double-layer film The processing process is relatively complicated and time-consuming. In addition, the storage and transportation of the film also requires the protection of release paper, resulting in high cost and not conducive to large-scale application.
[0004] In summary, the bonding properties of existing hot melt adhesives to metals and ABS plastics cannot meet the needs of practical applications.

Method used

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  • Novel hot melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of nylon-type copolyamide: 113.16g caprolactam (1mol), 234.73g nylon 66 salt (0.895mol), 273.02g nylon 1010 salt (0.737mol), 6.74g stearic acid (0.0237mol) and 100g deionized water, add into a 2L high-pressure reactor with a stirrer, a thermometer and a pressure gauge; after the feeding is completed, replace it with nitrogen and evacuate to remove the air in the reactor; then fill it with 0.2MPa high-purity nitrogen, and heat slowly Slowly raise the temperature to 250°C, under the pressure of 1.8MPa, heat preservation reaction for 2 hours, slowly reduce the pressure to normal pressure, and continue to depressurize to 0.05MPa after dehydration for 1 hour; discharge and pelletize to obtain granular nylon-type copolyamide ( PA-1).

[0024] Preparation of new hot melt adhesive: 400g PA-1, 400g thermoplastic polyurethane (melting point is 100°C, melt index is 40g / 10min / 2.16kg / 190°C), 5g maleic anhydride grafted polyethylene-vinyl acetate (grafted Branch rate 2%)...

Embodiment 2

[0027] Preparation of nylon-type copolyamide: After mixing 116.14g of caprolactam (1.026mol), 220.93g of nylon 66 salt (0.842mol) and 282.77g of nylon 1010 salt (0.763mol), add it to a In a 2L high-pressure reactor; add 7.49g stearic acid (0.0263mol) and 100g deionized water, replace with nitrogen and evacuate to remove the air in the reactor; then fill with 0.2MPa high-purity nitrogen, heat Slowly raise the temperature to 230°C, under the pressure of 1.0-1.2MPa, keep warm for 3 hours, slowly depressurize to normal pressure, and continue to depressurize to 0.05MPa for 1 hour after dehydration; discharge and granulate to obtain granular nylon type Copolyamide (PA-2).

[0028] Preparation of new hot melt adhesive: 435g PA-2, 435g thermoplastic polyurethane (melting point is 80°C, melt index is 45g / 10min / 2.16kg / 190°C), 7g maleic anhydride grafted polyethylene-vinyl acetate (grafted rate 2.3%), 112g thermoplastic phenolic resin, 10g calcium carbonate, 1g antioxidant BHT (2,6-di-t...

Embodiment 3

[0031] Preparation of nylon-type copolyamide: After mixing 116.14g of caprolactam (1.026mol), 262.35g of nylon 66 salt (1mol), and 224.27g of nylon 1010 salt (0.605mol), add it to a tank with agitator, temperature gauge and pressure gauge 2L high-pressure reactor; then add 8.23g stearic acid (0.0289mol) and 100g deionized water, replace with nitrogen and evacuate to remove the air in the reactor; then fill with 0.2MPa high-purity nitrogen, heat slowly Slowly raise the temperature to 230°C, under the pressure of 1.0-1.2MPa, heat preservation reaction for 3 hours, slowly reduce the pressure to normal pressure, and continue to reduce the pressure to 0.05MPa after dehydration for 1 hour; discharge and pelletize to obtain granular nylon copolymer Amide (PA-3).

[0032] Preparation of new hot melt adhesive: 440g PA-3, 440g thermoplastic polyurethane (melting point: 88°C, melt index: 42g / 10min / 2.16kg / 190°C), 9g polyolefin grafted with maleic anhydride (grafting rate: 1.2%) , 58g ter...

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Abstract

The invention discloses novel hot melt adhesive and a preparation method thereof and particularly provides novel hot melt adhesive applicable to bonding and compounding of metal and ABS plastic and a preparation method thereof. The novel hot melt adhesive is mainly characterized by being prepared from, by mass, 40-45% of nylon type copolyamide, 40-45% of thermoplastic polyurethane, 4-10% of compatilizer, 5-15% of tackifier, 1-5% of filler and 0.1-0.3% of antioxidant. The preparation method includes the steps that firstly, raw materials of a specific ratio are selected to conduct a polymerization reaction to generate the nylon type copolyamide which has good bonding performance for metal, then the nylon type copolyamide and the thermoplastic polyurethane are mixed and melted with other auxiliaries in proportion under the cooperative action of the specific compatilizer and then squeezed out, and the novel hot melt adhesive which has good bonding performance for both the metal and the ABS plastic is obtained; by means of a product of the novel hot melt adhesive, the requirement is met, the process is simple, and it is convenient to achieve industrial production and application.

Description

technical field [0001] The invention relates to a novel hot-melt adhesive and a preparation method thereof, in particular to a novel hot-melt adhesive suitable for bonding and compounding metal materials such as aluminum and stainless steel with ABS plastics and a preparation method thereof. Background technique [0002] Both metal materials and reinforced plastics are widely used engineering materials, and their properties have their own advantages: metal materials have obvious advantages in strength, toughness, heat resistance, heat conduction, wear resistance, texture, etc.; ABS is the most widely used general engineering plastic One, it has the characteristics of impact resistance, corrosion resistance, easy processing, stable size, good surface gloss, etc. It can also carry out secondary processing such as surface plating, welding, hot pressing and bonding. The application of direct bonding between metal and ABS plastic is more and more widely used in the instrumentatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J177/00C09J175/04C09J11/08C09J11/04
CPCC08L2205/035C09J11/04C09J11/08C09J175/04C09J177/00C08L75/04C08L51/06C08L93/04C08K3/34C08L77/00C08L61/06C08K2003/265C08L45/00C08K3/36C08L57/02
Inventor 曾作祥潘现路李哲龙
Owner SHANGHAI TIANYANG HOT MELT ADHESIVE CO LTD
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