Modified polyamide thermosol based on polyester and preparation thereof

A polyamide hot-melt adhesive and polyester modification technology, applied in the direction of adhesives, etc., can solve the problems of long open time and achieve the effects of short open time, shortened open time, and excellent high-temperature washing resistance

Active Publication Date: 2009-06-24
SHANGHAI TIANYANG HOT MELT ADHESIVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This shows that the specificity of the polyamide hot-melt adhesive is very strong, as the hot-melt adhesive for clothing, its washing resistance, dry-cleaning resistance performance still needs to be further improved, and there is the longer defect of open time, proposes the present invention for this reason

Method used

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  • Modified polyamide thermosol based on polyester and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In a 1.0L autoclave with stirrer, inlet pipe, exhaust pipe, temperature and pressure testing device, add 2-methyl adipic acid (80.0g), suberic acid (52.2g), sebacic acid in sequence (20.2g), 1-hexanoic acid (5.8g), 1-nonanoic acid (7.9g), 1,4-dimethylbutanediamine (35.4g), 3-ethyl-1,6-hexanediamine (29.2g), 3,4,5-trimethyl-1,9-nonanediamine (80.8g), 2,3-dimethyldecanediamine (30.3g), caprolactam (11.3g), 8- Capryllactam (28.2g), 2,6-di-tert-butyl-p-cresol (0.38g), water (14.4g), are replaced with nitrogen and vacuumized to remove the air in the kettle as far as possible, and then add nitrogen again to make the The internal pressure reaches 0.5Mpa, raise the temperature to 190°C, and control the pressure to 1.0Mpa, keep the temperature for 4.0 hours, reduce the pressure to 0.10Mpa, and add copolyester (29.0g) with an average molecular weight of 8100 and react for 2.0 hours, then cool down to 165 °C, reduce the pressure to 40kPa and dehydrate for 1.0 hour, then add nitro...

Embodiment 2

[0031] In a 1.0L autoclave with stirrer, inlet pipe, exhaust pipe, temperature and pressure testing device, add 2-ethyl adipic acid (43.5g), suberic acid (43.5g), azelaic acid in sequence (56.4g), sebacic acid (40.4g), 1-hexanoic acid (5.8g), 2-octanoic acid (4.3g), 1,4-dimethylbutanediamine (23.6g), 1,3-di Ethyl-butanediamine (36.5g), 3-isopropyl-pentamethylenediamine (51.1g), 3,4,5-trimethylnonanediamine (50.5g), ω-amino undecylidene acid ( 28.2g), 2,6-di-tert-butyl-p-cresol (0.24g), water (12.2g), replace and vacuumize with nitrogen, remove the air in the kettle as much as possible, then add nitrogen again to make the internal pressure reach 0.6Mpa, heat up to 210°C, and control the pressure to 1.5Mpa, keep the temperature for 2.0 hours, reduce the pressure to 0.10Mpa, add copolyester JCC-140 (36.5.0g) and heat up to 250°C for 1.5 hours, cool down to 170°C, depressurize to 60kPa and dehydrate for 2.0 hours, then add nitrogen and discharge under its protection to obtain a c...

Embodiment 3

[0033]In the autoclave with agitator, inlet pipe, exhaust pipe, temperature and pressure testing device, add 2-methyladipic acid (48.0g), 2-ethyladipic acid (43.5g), 3 -methyl suberic acid (37.6g), sebacic acid (40.4g), 1-hexanoic acid (5.8g), 1-decanoic acid (8.6g), 1,3-diethyl-butylene diamine (29.2 g), 3-ethylhexamethylenediamine (43.8g), 3,4,5-trimethylnonanediamine (40g), 2,3-dimethyldecanediamine (40.4g), 8-octyl Amide (14.1g), ω-aminoundecylidene acid (54.9g), 2,6-di-tert-butyl p-cresol (0.284g), water (10.0g), replaced with nitrogen and evacuated, as far as possible Remove the air in the kettle, then add nitrogen again to make the internal pressure reach 0.6Mpa, raise the temperature to 230°C, and control the pressure to 2.0Mpa, keep the temperature for 4.0 hours, reduce the pressure to 0.10Mpa, and add copolyester JCC-115 (50.0 g) and react for 2.0 hours, lower the temperature to 180°C, depressurize to 50kPa and dehydrate for 2.0 hours, then add nitrogen and discharg...

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Abstract

The invention provides a method for preparing a polyester modification-based polyamide hot melt adhesive, characterized by comprising the following steps: facilitating aliphatic dicarboxylic acid having 7-12 carbon atoms, aliphatic monocarboxylic acid having 7-12 carbon atoms, aliphatic diamine having 6-14 carbon atoms, lactam having 6-11 carbon atoms and water to react with a stabilizing agent; adding a proper amount of copolyester after the dehydration, continuing reaction for a particular time; discharging to acquire the polyester modification-based polyamide hot melt adhesive. The polyester modification-based polyamide hot melt adhesive of the invention has the characteristics of short opening hours, rapid curing, outstanding high temperature resistance and washability and the like; the polyester having a molecular weight of 8,100-18,300 is selected for the modification of the synthesized polyamide, which not only obviously shortens the opening hours of the adhesive, but also causes the obtained products to have less than 18% of the peeling strength loss rate after being washed with alkaline water above 80 DEG C, or to have less than 8% of the peeling strength loss rate after being dry-cleaned with tetrachloroethylene.

Description

technical field [0001] The invention relates to a hot-melt adhesive and a preparation method thereof, in particular to a polyester-modified polyamide hot-melt adhesive and a preparation method thereof. technical background [0002] Polyamide hot melt adhesive has outstanding advantages such as narrow melting range and high bonding strength. In the actual application process, after the hot melt adhesive is heated, melted and coated, it can be solidified after a little cooling, and it still maintains good bond strength near the softening point, and because the hot melt adhesive contains amide groups, amino groups, Polar groups such as carboxyl groups make it have good adhesion to many polar materials. Therefore, polyamide hot-melt adhesives are widely used in many industries such as chemical industry, automobile, light industry, food, textile, etc., and a number of patents have been proposed at home and abroad, aiming to strengthen its characteristics in a certain aspect: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J177/12
Inventor 曾作祥李哲龙韩涛朱万育马志艳陶思玉
Owner SHANGHAI TIANYANG HOT MELT ADHESIVE CO LTD
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