A kind of heavy calcium carbonate powder surface modification method

A technology of heavy calcium powder and heavy calcium powder, applied in the field of polymer chemistry and physics, can solve the problems of easy aggregation of nanoparticles, affecting the performance of composite materials, affecting the use of materials, etc., and achieves simple process, excellent performance indicators and low cost Effect

Inactive Publication Date: 2015-11-25
HEZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] When the heavy calcium powder is filled, it is easy to become the stress center of the material, which affects the use of the material; the nanoparticles are easy to agglomerate, and the surface of the heavy calcium powder can be covered with a layer of modifier to reduce the defects of the two and give full play to the advantages of the two; In addition, the surface of heavy calcium powder is hydrophilic and oleophobic, and its dispersion in organic polymer materials is not good, which will affect the performance of composite materials. Therefore, heavy calcium powder needs to be modified to broaden the application field. Improve application value

Method used

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  • A kind of heavy calcium carbonate powder surface modification method
  • A kind of heavy calcium carbonate powder surface modification method
  • A kind of heavy calcium carbonate powder surface modification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] The influence of embodiment 1 modifier concentration on the modification of heavy calcium particles

[0084] Toluene is used as the solvent (the solvent is dried by calcium hydride reflux to remove moisture), and the heavy calcium powder is dried at 100°C for 4 hours to remove moisture. The amount of solvent toluene is about 100 parts, and the heavy calcium powder is 10 parts. Maleic anhydride, acrylamide, methyl methacrylate (monomers are all industrial grade) about 0.1 parts in total (1% of the mass of heavy calcium powder), dissolved in a little N,N dimethylformamide (DMF) , and then add it to a reaction eggplant-shaped bottle (protected by inert gas nitrogen), add a polytetrafluoroethylene magnetic stirrer to stir, the temperature should be 80°C, the stirring speed should be 500r / min, and the reaction time should be 90min, filter and vacuum dry to remove The solvent can be used to obtain the active heavy calcium powder after the first modification, in order to pre...

Embodiment 2

[0093] The influence of embodiment 2 modifier time on the modification of heavy calcium particles

[0094] For the first modification reaction conditions, toluene is used as the solvent (the solvent is refluxed and dried with calcium hydride to remove moisture), and the heavy calcium powder is dried at 100°C for 4 hours to remove moisture. The amount of solvent toluene is about 100 parts. 10 parts of heavy calcium powder, monomer maleic anhydride, acrylamide, methyl methacrylate (monomers are all industrial grade) about 0.1 parts (1% of the weight of heavy calcium powder) in total, with a little N, N Methylformamide (DMF) was dissolved, then added to a reaction eggplant-shaped bottle (protected by inert gas nitrogen), and stirred with a polytetrafluoroethylene magnetic stirring bar. The temperature should be 90°C, the stirring speed should be 500r / min, and the reaction time Respectively 60min, 90min, 120min, 150min, 180min, filter, vacuum dry to remove the solvent to obtain th...

Embodiment 3

[0103] The influence of embodiment 3 modification temperature on the modification of heavy calcium particles

[0104] For the first modification reaction conditions, toluene is used as the solvent (the solvent is refluxed and dried with calcium hydride to remove moisture), and the heavy calcium powder is dried at 100°C for 4 hours to remove moisture. The amount of solvent toluene is about 100 parts. 10 parts of heavy calcium powder, monomer maleic anhydride, acrylamide, methyl methacrylate (monomers are all industrial grade) about 0.1 parts in total (1% of the weight of heavy calcium powder), with a little N, N Methylformamide (DMF) was dissolved, then added to a reaction eggplant-shaped bottle (protected by inert gas nitrogen), and stirred with a polytetrafluoroethylene magnetic stirring bar, and the reaction temperatures were 75°C, 80°C, 85°C, and 90°C , 95°C, add modifier concentration mass ratio of 0.2 parts (2% of the heavy calcium powder), the stirring speed is 500r / mi...

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Abstract

The invention discloses a method for modifying heavy calcium carbonate powder (referred to as heavy calcium carbonate powder, the same below). The composition of the heavy calcium powder modifier of the present invention is polymaleic anhydride-acrylamide-n-butyl methacrylate and stearic acid, that is, a composite compatibilizer, through two modifications, the first modification is wet In-situ polymerization method, the hair modifier is polymaleic anhydride-acrylamide-n-butyl methacrylate, the second time is dry method, the modifier is stearic acid, and the simple method is to mix it fully first and dissolve it In the mixture of liquid paraffin and waste oil, the total amount of the above-mentioned organic matter in the heavy calcium powder accounts for about 1-3% (mass fraction) of the heavy calcium powder. The volume ratio of paraffin wax and waste oil is about 1, the mass ratio of polymaleic anhydride-acrylamide-n-butyl methacrylate and stearic acid is about 2, and the active heavy calcium powder of the present invention can be used as chlorinated polyvinyl chloride , polyvinyl chloride, polyethylene filler. The active heavy calcium powder of the present invention has good dispersion uniformity and low cost in the above resin, and is oriented to industrial production.

Description

Technical field [0001] The present invention is a high -molecular chemistry and physical field, which involves a method of heavy calcium powder surface modification. Background technique [0002] The heavy calcium powder industry has become an important industrial branch of the non -metallic mining industry.According to the statistics of the Chinese Non -Mining Association Calcium Carbonate Special Committee, there are currently nearly 1,000 heavy calcium powder production and processing enterprises in my country.According to statistics, the national calcium powder production and sales in 2013 will increase by 5.26%year -on -year.After nearly two decades of development, the scale of heavy calcium powder has continued to expand. [0003] When filling the stress center of the material when filling, it affects the use of materials; nanoparticles are easy to reunite. Covering a layer of modifiers on the surface of the heavy calcium powder can reduce the defects of the two and give fu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F222/06C08F220/14C09C1/02C09C3/10C08K9/04C08K3/26
Inventor 周国永曾一文罗杨合李奇洪唐洋喜郑焱天陈兴田汤泉
Owner HEZHOU UNIV
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