Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

High-softening-point polyamide resin and its preparation method

A technology of polyamide resin and high softening point, which is applied in the field of high softening point polyamide resin and its preparation, and can solve the problems of unrealized adhesion and insufficient softening point

Inactive Publication Date: 2013-03-06
ANQING HONGTAI NEW MATERIAL
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For hot melt adhesives, if the softening point is not high enough, when the temperature is slightly higher, its most important function - adhesion cannot be realized.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-softening-point polyamide resin and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1. Feeding of dimer acid: open the high-purity nitrogen valve and repeatedly flush to ensure that the air content in the kettle does not exceed 5%, accurately weigh 6000 kg of dimer acid in the metering tank, and send it into the reaction kettle with a stainless steel gear pump or vacuum , The delivery temperature is 50-60°C. Weigh 100 kg of glacial acetic acid according to the required softening point and send it into the reactor. Close the feed valve, open the hot oil valve to start heating up.

[0016] 2. Feeding of ethylenediamine and hexamethylenediamine: According to the required softening point, weigh 500Kg of ethylenediamine and 150Kg of hexamethylenediamine and add them to the amine tank for mixing and set aside.

[0017] 3. When the material temperature rises to 130-140°C, start to drop the mixture of ethylenediamine and hexamethylenediamine. Control the filling speed at 5-6 kg / min. Observe the reaction phenomenon in the kettle through the sight glass, keep...

Embodiment 2

[0023] 1. Feeding of dimer acid: open the high-purity nitrogen valve and repeatedly flush to ensure that the air content in the kettle does not exceed 5%, accurately weigh 6000 kg of dimer acid in the metering tank, and send it into the reaction kettle with a stainless steel gear pump or vacuum , The delivery temperature is 50-60°C. Weigh 300 kg of glacial acetic acid according to the required softening point and send it into the reactor. Close the feed valve, open the hot oil valve to start heating up.

[0024] 2. Feeding of ethylenediamine and hexamethylenediamine: According to the required softening point, weigh 600Kg of ethylenediamine and 150Kg of hexamethylenediamine and add them to the amine tank for mixing and set aside.

[0025] 3. After that, the steps are the same as in Example 1.

Embodiment 3

[0027] 1. Feeding of dimer acid: open the high-purity nitrogen valve and repeatedly flush to ensure that the air content in the kettle does not exceed 5%, accurately weigh 6000 kg of dimer acid in the metering tank, and send it into the reaction kettle with a stainless steel gear pump or vacuum , The delivery temperature is 50-60°C. Weigh 500 kg of glacial acetic acid according to the required softening point and send it into the reactor. Close the feed valve, open the hot oil valve to start heating up.

[0028] 2. Feeding of ethylenediamine and hexamethylenediamine: According to the required softening point, weigh 700Kg of ethylenediamine and 150Kg of hexamethylenediamine and add them to the amine tank for mixing and set aside.

[0029] 3. After that, the steps are the same as in Example 1.

[0030] The indicators of each embodiment are shown in Table 1:

[0031] Table I:

[0032]

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a high-softening-point polyamide resin and its preparation method. The preparation method comprises the following steps: sending dimer acid to a reaction kettle at 50-60DEG C; sending acetate acid gracial to the reaction kettle, and heating; adding a mixture of ethylene diamine and hexanediamine in a dropwise manner when the temperature rises to 130-140DEG C, maintaining the reaction temperature at 155-165DEG C in the amine addition process; heating to 170-200DEG C after the ending of the amine addition, and reacting to acid-amine balance; heating to 235-245DEG C, and reacting for 2-4h to complete a resin condensation reaction; carrying out vacuum pumping to remove water and low-molecule compounds residual in the obtained material; and discharging the material when the resin temperature reduces to 150-170DEG C, and granulating to obtain the high-softening-point polyamide resin. The glossiness, the adhesion and the solvent release property of the polyamide resin are not changed, and the polyamide resin can satisfy needs of different clients and different industries.

Description

technical field [0001] The invention relates to a polyamide resin and a preparation method thereof, in particular to a high softening point polyamide resin and a preparation method thereof. Background technique [0002] Polyamide resin is the product obtained by the polycondensation reaction of dimer acid and diamine. It is a chemical raw material with excellent performance and wide application. Its main use is to prepare plastic printing ink and hot melt adhesive for clothing and shoemaking. [0003] Polyamide resin not only determines the main properties such as plastic ink adhesion and gloss, but also has a great influence on printing applicability. For example, the thermal properties and softening point of the resin are usually difficult to improve, which makes the plastic ink encounter high temperature environment after printing, and the surface of the printed matter will stick to each other, and in severe cases, all printed items will be scrapped. This is a ve...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08G69/34C08G69/28C08G69/46
Inventor 王文耕
Owner ANQING HONGTAI NEW MATERIAL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com