In-situ polymerization-modified silica sol and preparation method thereof

An in-situ polymerization and silica sol technology, applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve the problems of limited quantity of commercial PVP varieties, effective control of molecular weight of modified silica sol, etc., to save resources and save costs , Improve the effect of room temperature strength

Active Publication Date: 2015-02-25
GUANGDONG WELL SILICASOL
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 3. Due to the limited number of commercial PVP varieties, the molecular weight of PVP for modified silica sol cannot be effectively controlled according to different situations

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
  • In-situ polymerization-modified silica sol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] An in-situ polymerized modified silica sol comprises alkaline silica sol and PVP formed by in-situ polymerization in the silica sol; the pH value of the modified silica sol is preferably 9.00-10.50; the preferred silica sol is alkaline produced by the simple silicon method Silica sol.

Embodiment 2

[0035] This embodiment has carried out following improvement on the basis of embodiment 1:

[0036] SiO in modified silica sol 2 The mass fractions of PVP and PVP are 20.00-35.00% and 0.50-2.00%, respectively.

Embodiment 3

[0038] This embodiment has carried out following improvement on the basis of embodiment 1 or 2:

[0039] The initiator for initiating the polymerization of monomer NVP of PVP is AIBN, and the mass of AIBN is 0.50-1.00% of the mass of NVP.

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
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
Login to view more

Abstract

The invention discloses in-situ polymerization-modified silica sol. The in-situ polymerization-modified silica sol comprises alkaline silica sol and PVP obtained by in-situ polymerization. The in-situ polymerization-modified silica sol has the advantages of resource saving, low cost, popularization adaptability, less change of SiO2 content before and after modification, obvious improvement of modified silica sol viscosity, excellent interaction and performances between PVP and SiO2 in the silica sol, controllable modification degree and extensive applicability. The preparation method comprises the following steps of 1, uniformly dispersing a PVP monomer NVP in silica sol to obtain a mixture A, 2, dispersing an initiator in the mixture A to obtain a reaction system B, and 3, continuously stirring the reaction system B for a reaction lasting for 4-5h at a constant temperature of 90-100 DEG C to obtain modified silica sol. The preparation method has simple and convenient processes, realizes uniform dispersion of NVP in the silica sol by silica sol water as a solvent and in-situ polymerization on SiO2, and saves time and labor.

Description

[0001] technical field [0002] The invention relates to the field of silica sol binders, in particular to an in-situ polymerization modified silica sol and a preparation method thereof. [0003] Background technique [0004] Silica sol is a colloidal solution in which silica particles are evenly dispersed in water. It is an inorganic polymer material with excellent performance. It is widely used in industrial fields such as investment casting, ceramics and electronic polishing, coatings, and papermaking. There are a large number of hydroxyl groups on the surface of silica particles in silica sol, and the surface energy is large. At the same time, due to the limitation of its particle size and content, it cannot meet the application requirements of some special fields. For example, in the application of coatings, the coating film formed by a single silica sol exists Strong rigidity, poor gloss, easy to crack, poor leveling and other defects. In addition, in the foundry indu...

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): C01B33/146C08F126/10
Inventor 杨训成陈连喜范渊卿
Owner GUANGDONG WELL SILICASOL
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