Supercharge Your Innovation With Domain-Expert AI Agents!

Hydrophobic silica

a technology hydrophobic silica, which is applied in the direction of colloidal chemistry, silicon oxides, silicon compounds, etc., can solve the problems of unwanted speckling, linear decline of thickening action, and limited application of pyrogenically produced silica

Inactive Publication Date: 2002-03-28
EVONIK DEGUSSA GMBH
View PDF0 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantageously, as tamped or bulk density increases, thickening action declines in a linear manner.
This results in unwanted speckling.
Thus, once compacted, a hydrophilic, pyrogenically produced silica may only be used for a limited number of applications.

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
  • Hydrophobic silica
  • Hydrophobic silica

Examples

Experimental program
Comparison scheme
Effect test

example 2

[0033] Investigation of the influence of higher compaction on applicational properties

2 AE R 812, AE R 812, AE R 812, compacted compacted uncom- RHE RHE pacted UB 3847-2 UB 3847-3 UB 3847-1 (4) (5) AE R 812 10 kg 15 kg 20 kg RHE sack sack sack specific. Tamped density (DIN ISO g / l 50 87 106 approx. 787 / 11) 50 Effectiveness, ethanol 184 214 209 216 1) (0955) Effectiveness (UT), 218 260 290 236 1) ethanol (0965) Settling vol. % 10 1 1 1) (effectiveness, high-speed mixer)

[0034] 1. Determined on standard sample (UB 3391) RHE in the above table indicates the Rheinfelden plant located in Germany.

[0035] Rheological testing:

[0036] Polymer: Araldit M (biphenol-1-expoxy resin by Ciba-Geogy, in the form of clear yellow liquid).

[0037] Thixotroping agent: R 202 and R 812 Additive:

[0038] Sample A R 812 10 kg 2-10123

3 Storage time 5 rpm 50 rpm in days [mPa*s] [mPa*s] T.I. Sample production date: 24.02.1994 Spindle: 5 0 16600 4460 3.72 80-85.mu. Sample AR 812 15 kg 1.0 / 8 min Sample production date:...

example 3

[0044] Investigation of the influence of higher compaction on applicational properties.

4 AE R 202, AE R 202, AE R 812, compacted compacted uncompacted RHE RHE UB 3848-1 UB 3848-2 UB 3848-3 2-02024 2-01024- 2-01024- AE R 202 10 kg (2) (3) RHE sack 15 kg sack 20 kg sack specific. Tamped density (DIN ISO 787 / 11) g / l 51 93 119 approx. 60 3) Effectiveness, ethanol (0955) 319 334 336 334 1) Effectiveness (UT), ethanol (0965) 346 365 373 339 1) Settling vol.% 10 5 1 (effectiveness, high-speed mixer)

[0045] 1) Determined on standard sample (UB 3391)

[0046] 3) Guide value

[0047] The compacted AEROSIL R 202 samples behave in a similar manner to the compacted AEROSIL R 812 samples.

[0048] Reference is thus made to Example 2 with regard to the discussion.

[0049] The parameter of "effectiveness" reported in the tables herein relates to the high degree of fineness of the particle. This is therefore an indicator of high transparency and good stability of the resulting dispersions.

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
densityaaaaaaaaaa
densityaaaaaaaaaa
hydrophobicaaaaaaaaaa
Login to View More

Abstract

Hydrophobic, pyrogenically produced silica having a tamped density of 55 to 200 g / l is produced by hydrophobizing pyrogenically produced silica and then compacting it. The silica may be used for the production of dispersions.

Description

REFERENCE TO A RELATED APPLICATION[0001] This application claims the benefit of provisional application 60 / 171,667 filed Dec. 27, 1999 which is relied on and incorporated by reference.INTRODUCTION AND BACKGROUND[0002] This invention relates to a hydrophobic, pyrogenically produced silica, to a process for the production thereof and to the use thereof.[0003] It is known to compact hydrophilic, pyrogenically produced silica (EP 0 280 854 B1). Disadvantageously, as tamped or bulk density increases, thickening action declines in a linear manner. Dispersibility also falls as density increases. This results in unwanted speckling. Thus, once compacted, a hydrophilic, pyrogenically produced silica may only be used for a limited number of applications.[0004] It is therefore an object of the present invention to avoid the problems of compacted, hydrophobic, pyrogenically produced silica of the past.[0005] The above and other objects of the present invention can be achieved by developing a hyd...

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(United States)
IPC IPC(8): C01B33/18C09C1/30
CPCC01B33/18C01P2004/50C01P2004/61C01P2006/10C01P2006/11C01P2006/20Y10T428/2995C01P2006/80C01P2006/90C09C1/3036C09C1/3081C09C1/309C09C1/3684C01P2006/22
Inventor MICHAEL, GUNTHERKASACK, VOLKERNOWAK, RUDIGER
Owner EVONIK DEGUSSA GMBH
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