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

Preparation method of ultrafine surface modified dolomite

A technology of surface modification and dolomite, applied in the field of preparation of ultra-fine modified dolomite, can solve the problems of poor surface affinity of modifier and powder, insufficient particle size of powder, weak adhesion, etc. Physicochemical properties, simplified production process, concentrated effect of distribution

Active Publication Date: 2015-09-09
丹东亿龙高科技材料有限公司
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] According to previous technical achievements, dolomite is coarsely ground first, and then mechanochemically modified. Although the obtained product has good compatibility with polymer materials, it has the disadvantage that the particle size of the powder is not fine enough. ; But the ultrafine pulverization of dolomite first, and then its wet modification, has the disadvantages of complex production process, poor affinity between modifier and powder surface, weak and uneven adhesion

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
  • Preparation method of ultrafine surface modified dolomite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add dolomite powder with a particle size of 5 um in the ball mill jar of a planetary ball mill, take dolomite as 100 parts by weight, add 2 parts of stearic acid, and ball mill for 100 minutes at 60 ° C to obtain the particle size described in the present invention. Modified dolomite powder with a diameter of 2um; the activation degree of the tested sample is 99.3%; the oil absorption rate of modified dolomite powder is 12.5% ​​lower than that of unmodified dolomite powder; dolomite without surface modification is added to PP , the tensile strength gradually decreases with the increase of the content, and the tensile strength reaches the maximum when the dolomite filling amount after modification reaches 2%; when the unmodified dolomite is added to PP, the impact performance of the product reaches a maximum of 6.5 MPa at 1% , after being modified by stearic acid, the highest impact performance of the composite is 6.8 MPa when the filling amount of modified dolomite is 2%...

Embodiment 2

[0032] Add dolomite powder with a particle size of 6 um in the ball mill jar of a planetary ball mill, take dolomite as 100 parts by weight, add 2 parts of stearate, and ball mill for 100 min at 75 ° C to obtain the described method of the present invention. The modified dolomite powder with a particle size of 2 um; the activation degree of the tested sample is 99.5%; the oil absorption rate of the modified dolomite powder is 13.8% lower than that of the unmodified dolomite powder; the modified dolomite is added to PP , when the filling amount reaches 3%, the tensile strength is the highest; after being modified by stearate, the impact performance of the composite material is the highest at 7.0 MPa when the filling amount of modified dolomite is 3%.

Embodiment 3

[0034] Add dolomite powder with a particle size of 7 um in the ball milling tank of a planetary ball mill, take dolomite as 100 parts by weight, add 2.5 parts of silane coupling agent, and ball mill at 80 ° C for 120 min to obtain the described The modified dolomite powder with a particle size of 2 um; the activation degree of the tested sample is 99.1%; the oil absorption rate of the modified dolomite powder is 12.3% lower than that of the unmodified dolomite powder; the modified dolomite is added to PP , when the filling amount reaches 3%, the tensile strength is the highest; after the surface modification of the silane coupling agent, the impact performance of the composite material is the highest at 7.0 MPa when the filling amount of the modified dolomite is 3%.

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
particle diameteraaaaaaaaaa
diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing ultrafine surface modified dolomite, which is a method for preparing ultrafine modified dolomite by using mechanical chemical method. According to the method, dolomite is crushed, and then is added into a ball mill to obtain ultrafine modified dolomite powder through modifying agent based on dry ball milling. The method is a method for crushing dolomite into ultrafine powder and simultaneously surface modifying, the method not only simplifies the production process but also the product obtained according to the method has fine size and is centralized in distribution, and meanwhile the physical-chemical properties of the surface of dolomite powder are improved, the compatibility between dolomite powder and matrix is enhanced, and better mechanical strength and mechanical property of the material are kept.

Description

technical field [0001] The invention relates to a preparation method of ultrafine modified dolomite, in particular to a mechanochemical method for superfine dolomite and at the same time achieve the purpose of surface modification. Background technique [0002] Dolomite is a common white non-metallic mineral belonging to CaCO 3 and MgCO 3 The composite carbonate minerals in my country are extremely rich in reserves and are an important calcium and magnesium resource. Dolomite has been widely used as a filler in plastics, rubber, adhesives and other industries. However, the large particle dolomite powder in the polymer material will cause the deterioration of the mechanical strength of the material itself, such as tensile strength and elongation at break, and it is inevitable to make dolomite ultra-fine. [0003] At present, the physical pulverization method has become the most widely used method for producing ultrafine powder materials due to its advantages of low cost, s...

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): C09C1/02C09C3/04C09C3/12C09C3/08
Inventor 吴德贵江贤梁赵玉柱王征
Owner 丹东亿龙高科技材料有限公司