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

A kind of preparation method of polyurethane hot-melt transfer adhesive

A technology of transfer adhesive and polyurethane, which is applied in the field of transfer adhesive, can solve the problems of no polyurethane hot-melt transfer adhesive and achieve good adhesion

Inactive Publication Date: 2011-12-21
XIAMEN UNIV
View PDF6 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although there are many reports on general polyurethane hot-melt adhesives, there is no report on the preparation of polyurethane hot-melt transfer adhesives so far.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) Weigh 50 parts of polybutylene adipate in a three-necked bottle, dehydrate under reduced pressure at 110-120°C for 1 hour, and wait until the liquid in the three-necked bottle no longer has bubbles, indicating that the dehydration is complete.

[0016] 2) Install a stirring rod and a condenser, place the three-necked bottle in a water bath until the polybutylene adipate is cooled to room temperature, add 9.41 parts of liquefied MDI (NCO content 28% produced by Yantai Wanhua), and stir Mix the raw materials evenly, slowly add 1 part of di-n-butyltin dilaurate, add 100 parts of a mixed solvent of toluene and ethyl acetate (wherein toluene: ethyl acetate = 2: 1) under full stirring, and then heat up to 70 ° C in a water bath for 20 minutes. Fully react for 3h.

[0017] 3) Add 1.5 parts of 1,4-butanediol into the three-neck flask, raise the temperature of the water bath to 85° C., stop the reaction after 2 hours of reaction, and obtain a yellow homogeneous transparent li...

Embodiment 2

[0020] As described in Example 1, change step 2 to: install a stirring rod and a condenser tube, place the three-necked bottle in a water bath until the polybutylene adipate is cooled to room temperature, add 11.25 parts of liquefied MDI and stir Mix the raw materials evenly, slowly add 1 part of di-n-butyltin dilaurate, add 100 parts of a mixed solvent of toluene and ethyl acetate under full stirring for 20 minutes, then raise the temperature in the water bath to 70°C, and fully react for 3 hours.

Embodiment 3

[0022] As described in Example 1, change step 3 to dissolve 2 parts of 3,3'-dichloro-4,4'-diaminodiphenylmethane (MOCA) in a small amount of toluene under heating, and slowly add it to the three-necked bottle , the temperature of the water bath was lowered to 60°C, and the reaction was stopped after fully reacting for 2 hours to obtain a dark yellow homogeneous transparent liquid.

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 preparation method of polyurethane hot-melt transfer printing adhesive, which relates to a transfer printing adhesive. Put the polybutylene adipate into the container, after dehydration under reduced pressure, install the stirring rod and the condenser, and then put it in the water bath until the polybutylene adipate is cooled to room temperature, add diphenyl Methane-4,4'diisocyanate and catalyst di-n-butyltin dilaurate, after stirring, take a water bath, heat up to react, then add a small molecule chain extender to continue the reaction to obtain a polyurethane hot melt adhesive solution; adjust the prepared polyurethane hot melt adhesive solution Viscosity and solid content, coated on the ink layer of the thermal transfer film, after the solvent evaporates, the ink layer is firmly transferred to the thermal transfer adhesive film on various materials such as metal, glass, ceramics, plastics, and fabrics . Not only has good wettability with the ink layer of the thermal transfer film, but also has good adhesion with metal, glass, ceramics, various plastics, fabrics and other materials, and can firmly bond the ink layer to the substrate , is a widely used hot melt transfer adhesive.

Description

technical field [0001] The invention relates to a transfer printing adhesive, in particular to a preparation method of a polyurethane hot-melt transfer printing adhesive. Background technique [0002] Thermal transfer technology is to screen-print plastic ink on a special transfer paper that can be peeled off, and then transfer the graphics on the paper to daily necessities through a thermal transfer machine. Because of its advantages such as good printing effect, firm and durable and bright color, it has been widely used in the printing of trademarks of daily necessities. Thermal transfer adhesive film refers to a special functional printing film with adhesive on the surface of the substrate, which is detached from the carrier film together with the release layer under the combined action of heat and pressure. Thermal transfer film generally has a four-layer structure, which are PET film carrier, release layer, ink layer and adhesive layer. The layer and the substrate sur...

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): C09J175/06C09J7/02C08G18/66C08G18/42B41M5/382
Inventor 邹友思蒲珏文林华端吕耕敏洪阿乐尚明屹黄莺郑延清
Owner XIAMEN UNIV
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