Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of silane modified linear polyurea adhesive and its preparation and application

A silane-modified, primary amino-based silane coupling agent technology, used in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., to reduce the cost of raw materials

Active Publication Date: 2020-11-24
WANHUA CHEM GRP CO LTD
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the embodiments of the present invention is to provide a non-isocyanate-based silane-modified linear polyurea adhesive and its preparation method and application in sealant formulations, aiming to solve the problem of using highly toxic isocyanate in the synthesis process of traditional silane-modified polyurethane adhesives , and cannot be used for a long time under high temperature (>80°C) conditions

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
  • A kind of silane modified linear polyurea adhesive and its preparation and application
  • A kind of silane modified linear polyurea adhesive and its preparation and application
  • A kind of silane modified linear polyurea adhesive and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] (1) Preparation of carbonate-terminated linear polyurea: Dissolve 0.02mol HDA into 0.02mol IPDA at 90°C under the protection of nitrogen, and then slowly add it dropwise to 0.072mol diethyl carbonate system. The temperature of the reaction system was raised to 120° C., and the reaction was continued for 10 h, and then the generated ethanol and water were removed in vacuum to obtain a carbonate-terminated linear polyurea.

[0065] (2) Preparation of siloxane-terminated linear polyurea adhesive: at 100°C, under the protection of nitrogen, take 0.021mol 3-aminopropyltriethoxysilane (KH550) and add it to the carbonic acid obtained in the previous step In the ester-terminated linear polyurea, after mechanical mixing for 2 hours, the temperature of the reaction system was raised to 120° C., and the reaction was continued for 10 hours. Then the ethanol generated in the system was removed by vacuum to obtain the silicone-terminated linear polyurea adhesive SPUA1.

Embodiment 2

[0067] (1) Preparation of carbonate-terminated linear polyurea: Slowly add 0.03mol IPDA and 0.01mol polyetheramine (D230) dropwise to 0.072mol diethyl carbonate system at 90°C under nitrogen protection. , raise the temperature of the reaction system to 120° C., continue the reaction for 10 h, and remove the generated ethanol and water in a vacuum to obtain a carbonate-terminated linear polyurea.

[0068] (2) Preparation of siloxane-terminated linear polyurea adhesive: at 100°C, under the protection of nitrogen, take 0.021mol 3-aminopropyltriethoxysilane (KH550) and add it to the carbonic acid obtained in the previous step In the ester-terminated linear polyurea system, after mechanical mixing for 2 hours, the temperature of the reaction system was increased to 120°C, and the reaction was continued for 10 hours. Then the ethanol generated in the system was removed by vacuum to obtain the silicone-terminated linear polyurea adhesive SPUA2.

Embodiment 3

[0070] (1) Preparation of carbonate-terminated linear polyurea: Dissolve 0.02mol HDA into 0.02mol 1,3-propylenediamine at 90°C under nitrogen protection, and then slowly add it dropwise to 0.072mol diethyl carbonate system, After the dropwise addition, raise the temperature of the reaction system to 120° C., continue the reaction for 10 h, and remove the generated ethanol and water in a vacuum to obtain a carbonate-terminated linear polyurea.

[0071] (2) Preparation of siloxane-terminated linear polyurea adhesive: at 100°C, under the protection of nitrogen, take 0.021mol 3-aminopropyltriethoxysilane (KH550) and add it to the carbonic acid obtained in the previous step In the ester-terminated linear polyurea system, after mechanical mixing for 2 hours, the temperature of the reaction system was increased to 120°C, and the reaction was continued for 10 hours. Then the ethanol generated in the system was removed by vacuum to obtain the silicone-terminated linear polyurea adhesiv...

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 silane-modified linear polyurea adhesive, a preparation method and application thereof. The preparation method uses one or more diamines and excess aliphatic carbonate to prepare carbonate-terminated linear polyurea, and then uses a primary amino silane coupling agent for capping to prepare a silane-terminated linear polyurea. Polyurea adhesive. The method is simple in operation and pollution-free, no longer prepares polyurea from traditional isocyanate, omits the step of photochemically preparing diisocyanate from diamine, saves energy, and the synthesis process is mild without a large amount of heat release. There will be no cross-linking structure in the process, so that the preparation of linear polyurea is easier. The silane-modified linear polyurea sealant is suitable for assembly bonding of automobile windshields.

Description

technical field [0001] The invention belongs to the field of organic polymer materials, and relates to a non-isocyanate method silane-modified linear polyurea adhesive, a preparation method thereof and an application in an automobile windshield sealant formulation system. Background technique [0002] Polyurethane material has excellent mechanical strength, toughness and wear resistance, and is one of the most widely used polymer materials in daily life. It is mainly prepared by the reaction of isocyanate and polyol, with flexible molecular structure design and a wide range of formulation properties. The sealant made of polyurethane is one of the most widely used sealing materials at present. Polyurethane sealants have excellent mechanical properties and are mainly used in the assembly of automotive windshields. However, the aging resistance of polyurethane materials is poor, and the aged sealant cannot guarantee the safety of automobile operation. Polyurethane sealant ha...

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 Patents(China)
IPC IPC(8): C08G71/02C09J175/02
CPCC08G71/02C09J175/02
Inventor 杜秀才刘赵兴周萌姜庆梅孙玲玉孙玉成倪自林初长坤
Owner WANHUA CHEM GRP CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com