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

Bio-based polyether ester reactive polyurethane hot melt adhesive and preparation method thereof

A polyurethane hot-melt adhesive, bio-based technology, applied in the field of polyurethane hot-melt adhesives, can solve the problems of gel at the needle, not smooth, and insufficient long-term thermal stability, and achieve the effect of improving comprehensive performance and environmental protection attributes

Active Publication Date: 2021-12-28
XIAMEN WELDTONE TECH CO LTD
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of ordinary hot melt adhesive cannot achieve the bonding strength of reactive polyurethane hot melt adhesive because it does not have the unique reactivity of PUR hot melt adhesive.
[0004] In addition, in the assembly and bonding process of electronic products, the glue machine sometimes needs to be kept in a heated state for several days until the glue in a single package is used up after the glue is applied, but the long-term heat of most reactive polyurethane hot melt adhesives Insufficient stability, resulting in problems such as gel at the needle, broken flow, liquid droplets, and discontinuity after continuous heating, which seriously affects the stability of the amount of glue applied and the quality of product bonding

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
  • Bio-based polyether ester reactive polyurethane hot melt adhesive and preparation method thereof
  • Bio-based polyether ester reactive polyurethane hot melt adhesive and preparation method thereof
  • Bio-based polyether ester reactive polyurethane hot melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The preparation method of bio-based polyether ester polyol A1 is as follows:

[0045] Add 150g of thoroughly dried L-lactide, 100g of ε-caprolactone and 100g of short-chain polyether polyol into the reaction kettle, add 0.88g of stannous octoate as the second catalyst, and raise the temperature to 115 under the protection of inert gas. °C, reacted for 24 hours, and then cooled to room temperature to obtain a solid product, namely bio-based polyether ester polyol A1.

Embodiment 2

[0047] The preparation method of bio-based polyether ester polyol A2 is as follows:

[0048] Add 100g of thoroughly dried L-lactide, 150g of ε-caprolactone and 100g of short-chain polyether polyol into the reaction kettle, add 0.88g of stannous octoate as the second catalyst, and raise the temperature to 115 under the protection of inert gas. °C, reacted for 24 hours, and then cooled to room temperature to obtain a solid product, namely bio-based polyether ester polyol A2.

Embodiment 3

[0050] The preparation method of bio-based polyether ester polyol A3 is as follows:

[0051] Add 50g of thoroughly dried L-lactide, 200g of ε-caprolactone and 100g of short-chain polyether polyol into the reaction kettle, add 0.88g of stannous octoate as the second catalyst, and raise the temperature to 115 under the protection of inert gas. °C, reacted for 24 hours, and then cooled to room temperature to obtain a solid product, namely bio-based polyether ester polyol A3.

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 relates to a bio-based polyether ester reactive polyurethane hot melt adhesive and a preparation method thereof. The bio-based polyether ester reactive polyurethane hot melt adhesive comprises the following components in parts by weight: 50-80 parts of bio-based polyether ester polyol; 8-15 parts of polyisocyanate; 0.1-2 parts of an antioxidant; 0.1-2 parts of a first catalyst; 0-20 parts of a thermoplastic resin; 0-5 parts of a silane coupling agent; and 0-10 parts of an auxiliary agent, wherein the bio-based polyether ester polyol is a triblock copolymer of polyester and polyether, and the number-average molecular weight of the bio-based polyether ester polyol is 2000-5000. According to the invention, the bio-based polyether ester polyol prepared from bio-based raw materials is used as a component, and has the structures and characteristics of polyester and polyether on a polymer polyol molecular chain, so that the bio-based polyether ester reactive polyurethane hot melt adhesive is more environment-friendly; the compatibility of two polyols in the production and blending process of the reactive polyurethane hot melt adhesive can be greatly improved, and the bio-based polyether ester reactive polyurethane hot melt adhesive has the advantages of good mechanical property, bonding strength, excellent gluing smoothness and the like.

Description

technical field [0001] The invention relates to the field of polyurethane hot-melt adhesives, in particular to a bio-based polyether ester reactive polyurethane hot-melt adhesive and a preparation method thereof. Background technique [0002] Moisture-curing reactive polyurethane (PUR) adhesive has excellent cohesion and bonding strength, and has excellent bonding strength to various substrates. It also shows the characteristics of gradually increasing bonding strength with increasing curing time, and is widely used. In electronics, books, packaging, automobiles and other fields. Polymer polyols are important components of reactive polyurethane hot melt adhesives, mainly including polyester polyols and polyether polyols, among which polyester polyols make hot melt adhesives have better cohesion and strength, and polyether polyols make adhesives It has better flexibility and hydrolysis resistance, and the combination of the two can ensure the comprehensive performance of hot...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C09J175/08C08G63/664C08G18/48C08G18/42
CPCC09J175/06C09J175/08C08G63/664C08G18/4833C08G18/4854C08G18/48C08G18/428C08G18/4277
Inventor 曹阳刘涛林鸿腾李帅
Owner XIAMEN WELDTONE TECH CO LTD
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