Aqueous composite adhesive and preparation method and use thereof

A composite adhesive and adhesive technology, applied in the direction of adhesives, grafted polymer adhesives, adhesive types, etc., can solve the problems of high cost and uncompetitive water-based adhesives, and achieve improved water resistance and high composite strength , a wide range of effects

Inactive Publication Date: 2010-07-07
BEIJING COMENS NEW MATERIALS
View PDF1 Cites 30 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Patent CN200610036231.3 introduces a water-based adhesive for flexible packaging, in which two raw materials, acetoacetate ethyl methacrylate (AAEM) and hydrazine, are used for cross-linking after film formation throu

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
  • Aqueous composite adhesive and preparation method and use thereof
  • Aqueous composite adhesive and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] Example 1

[0035] The embodiment of the present invention provides an economical and excellent water-based composite adhesive. The adhesive is a polyurethane / acrylate (PUA) composite emulsion formed by chemically copolymerizing polyurethane and polyacrylate, and its solid content is 30-50%, wherein polyurethane accounts for 5-20% of the total weight of the composite emulsion, polyacrylate accounts for 25-45% of the total weight of the composite emulsion, and water accounts for 50-70% of the total weight of the composite emulsion.

[0036] The preparation method of the water-based composite adhesive comprises the following steps:

[0037] a. Preparation of water-based polyurethane PU emulsion: dehydrate the macromolecular diol at 110 °C and vacuum 0.02MPa for 1 h, then drop to room temperature, add diisocyanate and a small amount of organotin catalyst, and react at 60 to 80 °C for 2 to 4 hours , and then cooled to 60 ° C and added a small molecule chain extender and di...

Example Embodiment

[0056] Example 2

[0057] This embodiment provides a preparation method of a water-based composite adhesive, and the obtained adhesive can be used to prepare a composite film flexible package, and the method specifically includes the following steps:

[0058] a. Preparation of water-based PU emulsion: take 180g of polyether diol (Mn=2000), dehydrate at 110°C and vacuum 0.02MPa for 1 hour, then reduce to room temperature, add 68g of TDI and 0.02g of dibutyltin dilaurate catalyst, in React at 60~80℃ for 2~4h, then cool down to 60℃, add 6g BDO and 16g DMPA, continue to react for 3~6h to obtain PU prepolymer, add 100g mixture of ethyl acrylate and butyl acrylate (EA:BA) =3:1, weight ratio) as a solvent to dilute the obtained PU prepolymer, then add 25g of hydroxyethyl acrylate, continue the reaction for 2 to 4h, then reduce to room temperature and add 11g of triethylamine (TEA) for neutralization, Add deionized water to disperse water-based polyurethane emulsion under the action ...

Example Embodiment

[0061] Example 3

[0062] The present embodiment provides a preparation method of a water-based composite adhesive, and the method specifically includes the following steps:

[0063] a. Preparation of water-based PU emulsion: take 160g of polyether diol (Mn=2000) and 40g of polyester diol (Mn=2000), dehydrate at 110°C and vacuum 0.02MPa for 1h, then drop to room temperature, add 86g TDI and 0.03g dibutyltin dilaurate catalyst, react at 60~80℃ for 2~4h, then cool down to 60℃, add 7g BDO and 19g DMPA, continue to react for 3~6h to obtain PU prepolymer, add 100g methyl acrylate and the mixture of butyl acrylate (MA: BA=1: 1, weight ratio) as solvent to dilute the prepolymer, then add 30g of hydroxypropyl acrylate, continue the reaction for 2 to 4h, reduce to room temperature and add 12g of triethylamine ( TEA) neutralization, adding deionized water under the action of high shear force to disperse water-based polyurethane emulsion;

[0064]b. Preparation of water-based PUA emuls...

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

PropertyMeasurementUnit
Glass transition temperatureaaaaaaaaaa
Viscosityaaaaaaaaaa
Viscosityaaaaaaaaaa
Login to view more

Abstract

The invention discloses an aqueous composite adhesive and a preparation method thereof, and belongs to the field of high molecular materials. The adhesive is polyurethane/acrylate PUA composite emulsion, wherein based on the total weight of the PUA composite emulsion, the content of the polyurethane is 5 to 20 percent; the content of the polyacrylate is 25 to 45 percent; the content of water is 50 to 70 percent; and the solid content of the PUA composite emulsion is 30 to 50 percent. The preparation method comprises the following steps: preparing the aqueous polyurethane emulsion; preparing the aqueous polyurethane/acrylate PUA composite emulsion from the aqueous polyurethane emulsion; and finally, regulating the solid content of the aqueous polyurethane/acrylate PUA composite emulsion by using de-ionized water, and adding an antifoaming agent, a wetting agent and an antiseptic to prepare the aqueous composite adhesive. In the prepared aqueous PUA composite emulsion, emulsion particles have complex phase structures, a carbamic acid ester chain is knitted tightly with an acrylicacid chain at the molecular level, and the synergic effect between the two makes the performance of a coating better than that of a physically blended coating, so that the aqueous PUA composite emulsion has high performance and environmental protection property.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a high-performance water-based composite adhesive and its preparation method and application. Background technique [0002] In recent years, in the field of packaging, composite flexible packaging has developed rapidly due to its light weight, low price, bright colors, changeable shape and other good practical properties and excellent barrier properties, and has gradually replaced rigid packaging materials, greatly facilitating people's basic necessities of life. and improve people's quality of life. Composite film flexible packaging also belongs to composite flexible packaging. It has the characteristics of shielding, printability and heat sealing. It is widely used in the packaging of food, medicine, cosmetics and office consumer goods, and can partially replace packaging materials such as glass, tinplate, paper and cardboard. . With the development of food and pharmaceutical...

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): C09J151/08
Inventor 陈小锋沈峰
Owner BEIJING COMENS NEW MATERIALS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap