Supercharge Your Innovation With Domain-Expert AI Agents!

Modified heavy calcium carbonate as well as preparation method and application thereof

A heavy calcium carbonate, modified technology, applied in the field of materials, can solve the problems of unfriendly environment, difficult to guarantee, no ability to adsorb formaldehyde, etc., and achieve the effect of improving adsorption effect, good dispersibility, and good lipophilicity

Inactive Publication Date: 2021-03-12
深圳市锦昊辉实业发展有限公司
View PDF18 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is easy to generate a lot of dust, which is not friendly to the environment, and the operator works in a working environment with large dust for a long time, which is easy to endanger human health
In addition, the existing calcium carbonate modification process has a low coating rate on the calcium carbonate surface, so it is difficult to ensure the compatibility of the prepared modified calcium carbonate with the high molecular polymer when it is filled into the high molecular polymer, and dispersion in the system
And the existing modified calcium carbonate generally does not have the ability to adsorb formaldehyde

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
  • Modified heavy calcium carbonate as well as preparation method and application thereof
  • Modified heavy calcium carbonate as well as preparation method and application thereof
  • Modified heavy calcium carbonate as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0013] The embodiment of the present invention provides a kind of preparation method of modified ground calcium carbonate, comprises the steps:

[0014] Step 101, put the cleaned and dried shells into a muffle furnace, calcinate them at 550°C-650°C for 5-6 hours, take them out and cool them down to room temperature, and then use secondary wet grinding to obtain shell powder.

[0015] In the embodiment of the present invention, shell is a kind of natural raw material, is made of CaCO such as calcite or aragonite 3 It is composed of minerals (inorganic phase) and organic matter (organic phase), and its main components are calcium carbonate, calcium oxide, calcium hydroxide and other calcified substances.

[0016] Before putting the shells into the muffle furnace for calcination, soak the shells with a citric acid solution with a concentration of 0.1% to 0.2% for 1 to 2 hours to remove organic and / or inorganic impurities adhering to the surface of the shells, and then use the Af...

Embodiment 1

[0029] The preparation steps of the modified heavy calcium carbonate of the present embodiment are as follows:

[0030] Put the cleaned and dried shells into a muffle furnace, calcinate them at 550°C for 5 hours, take them out and cool them to room temperature, and grind the calcined shells cooled to room temperature for 50 minutes at a grinding temperature of 20°C; Grade shell powder; the above-mentioned primary grinding powder is ground at a grinding temperature of 32°C for 20 minutes to obtain secondary shell powder; the above-mentioned secondary shell powder, vegetable glycerin, polymaleic acid and ammonium nitrate are mixed according to a mass ratio of 18:1 :6:0.2 for mixing and soaking for 0.5h to obtain shell slurry; the above shell slurry was spray-dried, and during the spraying process, the above shell slurry was sprayed with a titanate coupling agent and a mass concentration of 10% The mixture of calcium hydroxide solution, the angle of 60 ° between the jet flow of t...

Embodiment 2

[0032] The preparation steps of the modified heavy calcium carbonate of the present embodiment are as follows:

[0033]Put the cleaned and dried shells into a muffle furnace, calcinate them at 600°C for 5 hours, take them out and cool them to room temperature, and grind the calcined shells cooled to room temperature for 40 minutes at a grinding temperature of 25°C; Grade shell powder; the above-mentioned primary grinding powder is ground at a grinding temperature of 35°C for 30 minutes to obtain secondary shell powder; the above-mentioned secondary shell powder, vegetable glycerin, sodium polyacrylate and urea are mixed according to the mass ratio of 18:2:5 : 0.3 mixed, and soaked for 1h, to obtain shell slurry; above-mentioned shell slurry is spray-dried, and in the spraying process, spraying titanate coupling agent and mass concentration to the above-mentioned shell slurry is calcium hydroxide of 15% The mixture of the solution, the angle between the jet flow of the shell sl...

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 is applicable to the field of materials, and provides modified heavy calcium carbonate as well as a preparation method and application thereof. The preparation method comprises the following steps: putting cleaned and dried shells into a muffle furnace for calcining, and grinding in a two-stage wet grinding mode to obtain shell powder, so a large amount of dust can be prevented frombeing generated in the preparation process, and the preparation method is environment-friendly; mixing the shell powder with vegetable glycerol, a dispersing agent and ammonium salt according to a specific ratio, and performing soaking to obtain shell slurry; finally, spraying a mixture of a coupling agent and calcium hydroxide to the shell slurry in a spray drying mode so as to conduct coating modification on the shell slurry, wherein the coating rate is high, coating is complete, and finally dried modified calcium carbonate is collected and obtained. The modified heavy calcium carbonate prepared by adopting the modification method disclosed by the invention is good in lipophilicity, can be completely compatible with organic polymer film-forming substances in a coating after being filledinto the coating, is good in dispersity in a coating system, and can improve the adsorption effect of the coating on formaldehyde.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a modified heavy calcium carbonate and its preparation method and application. Background technique [0002] Calcium carbonate is widely used as an inorganic filler in coatings, rubber, plastics and other fields due to its advantages of wide sources and low price. However, due to the hydrophilic and oleophobic surface of calcium carbonate, large specific surface area, high surface energy, and easy agglomeration between particles, calcium carbonate cannot be well dispersed in the coating system and has poor compatibility with organic polymers. Therefore, generally when filling it into a high molecular polymer, it is necessary to modify calcium carbonate so that it can be well dispersed in the high molecular polymer and enhance the compatibility with the high molecular polymer. improve its performance. [0003] Most of the existing calcium carbonate modification methods are d...

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): C09C1/02C09C3/04C09C3/08C09C3/06C09D7/62B01D53/02
CPCB01D53/02B01D2253/25B01D2257/704C09C1/021C09C3/006C09C3/041C09C3/043C09C3/063C09C3/08C09D7/62
Inventor 邓娇容
Owner 深圳市锦昊辉实业发展有限公司
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