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

A kind of alkoxy terminated polysiloxane polymer and preparation method thereof

A technology of alkoxy-terminated and hydroxyl polydimethylsiloxane, which is applied in the direction of adhesives, etc., can solve problems such as production troubles, damage to processing performance, and viscosity peaks, and achieve simple and stable production processes and difficult neutralization , the effect of high capping rate

Active Publication Date: 2018-06-22
ZHEJIANG XINAN CHEM INDAL GROUP
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. After adding the titanate complex catalyst, there will be a viscosity peak, which will bring trouble to production
[0004] 2. The hydroxyl groups in the 107 glue are easy to form hydrogen bonds with the hydroxyl groups on the surface of the inorganic fillers, making it difficult for the fillers to disperse, resulting in "structuralization" of the mixed rubber and destroying the processing performance
[0005] 3. The incomplete reaction of 107 glue and crosslinking agent in mixing will affect the storage stability
The preparation method is more complicated, and the obtained low-viscosity alkoxy silicone oil with an alkoxy content of 10-30% is not suitable for the preparation of one-component alcohol-type sealant
At present, there are no mature alkoxy silicone oil products suitable for the preparation of one-component dealcoholized sealants in the domestic market.

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 alkoxy terminated polysiloxane polymer and preparation method thereof
  • A kind of alkoxy terminated polysiloxane polymer and preparation method thereof
  • A kind of alkoxy terminated polysiloxane polymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Catalyst preparation: At room temperature, 1 mol of dibutylamine and 1 mol of acetic acid were subjected to a salt-forming reaction in a flask for 1 hour to prepare dibutylamine acetate.

[0026] Preparation of alkoxy-terminated polymer: Add 100 parts of α, ω-dihydroxypolydimethylsiloxane and 1 part of methyltrimethoxysilane into the reaction kettle, and stir to raise the temperature to 60 At about ℃, add 0.05 part of the above-mentioned dibutylamine acetate, keep it warm for about 3 hours, heat up to 110 ℃, distill at a vacuum degree of ≥0.09MPa for 1 hour, remove low molecular weight, and obtain alkoxy-terminated polysiloxane Polymer, product performance test results are shown in Table 1.

Embodiment 2

[0028] Catalyst preparation: 1 mol of isopropylamine and 1 mol of formic acid were subjected to a salt-forming reaction in a flask at room temperature for 3 hours to prepare isopropylamine formate.

[0029] Preparation of alkoxy-terminated polymer: Add 100 parts of α, ω-dihydroxy polydimethylsiloxane and 5 parts of vinyltriethoxysilane into the reaction kettle, and stir to raise the temperature to At about 60°C, add 0.1 part of the above-mentioned isopropylamine formate, keep it warm for about 3 hours, heat up to 110°C and distill under reduced pressure for 1 hour, remove low molecular weight, and obtain alkoxy-terminated polysiloxane polymer, product performance test results See Table 1 for details.

Embodiment 3

[0031] Catalyst preparation: 1 mol of aniline and 1 mol of formic acid were subjected to a salt-forming reaction in a flask at room temperature for 2 hours to prepare aniline formate.

[0032] Preparation of alkoxy-terminated polymer: Add 100 parts of α, ω-dihydroxypolydimethylsiloxane and 1 part of methyltriethoxysilane to the reaction kettle, and stir and heat up to At about 60°C, add 0.2 parts of the above-mentioned aniline formate, keep it warm for about 1h, then raise the temperature to 110°C and distill under reduced pressure for 1h to remove low molecular weight, and obtain an alkoxy-terminated polysiloxane polymer. The product performance test results are detailed See Table 1.

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 an alkoxy-terminated polysiloxane polymer. According to the method, by adopting organic amine salt as a catalyst for a reaction, the terminating rate of alpha,omega-dihydroxy polydimethylsiloxane is effectively increased and the catalyst and excessive terminating agent can be reacted to obtain amide substances which are harmless to the stability of a product so that the subsequent processing is not needed and the reaction flow is simplified.

Description

technical field [0001] The invention relates to an alkoxy-terminated polysiloxane polymer and a preparation method thereof, belonging to the technical field of organic silicon materials. Background technique [0002] One-component dealcoholized sealant releases alcohol during vulcanization, which is non-polluting and non-corrosive. It can be widely used in electronic appliances and construction industries. As a green and environmentally friendly adhesive, alcohol-type sealant will be the trend of future market applications. . At present, the dealcoholized RTV-1 sealant put into the market in China is mainly based on α, ω-dihydroxypolydimethylsiloxane (107 glue), methyltrimethoxysilane as crosslinking agent, organic titanium It is prepared by adding fillers and additives to the catalyst. There are 3 main disadvantages of this formulation in production application: [0003] 1. After adding the titanate complex catalyst, there will be a viscosity peak, which will bring troub...

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): C08G77/18C09J183/06
Inventor 叶全明徐晓明邵月刚朱利民刘筠范峰强郑凯阳杜建佳
Owner ZHEJIANG XINAN CHEM INDAL GROUP
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