Preparingm ethod for olefinic polymer/calcium carbonate composite nanometer particle with high stem grafting rate and high stem grafting efficiency |
Title： |
| Preparingm ethod for olefinic polymer/calcium carbonate composite nanometer particle with high stem grafting rate and high stem grafting efficiency |
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Application Number： |
200410048035 |
Application Date： |
2004/06/11 |
Announcement Date： |
2005/02/23 |
Pub. Date： |
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Publication Number： |
1583862 |
Announcement Number： |
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Grant Date： |
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Granted Pub. Date： |
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ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
C08F 2/44, C08K 3/26, C08K 9/04, C08L 23/00 |
Applicant(s)： |
Tsinghua Univ. |
Inventor(s)： |
Yu Jian, Liu Wenfang, Guo Chaoxia |
Key Words： |
high stem grafting rate, high stem grafting efficiency,olefinic polymer,calcium carbonate,nanometer |
Abstract： |
Preparation of olefin polymer/calcium carbonate composite nano powders with higher grafting rate and grafting efficiency is carried out by: using CaCO3 powders pretreated by coupling agent and olefin monomer as raw materials, and emulsion polymerizing them in water as dispersing medium with existence of emulsifier and initiator. In pretreatment, dosage of the coupling agent is 1 -10wt% of CaCO3 mass. In emulsion polymerization, their weight percentage is as below: olefin monomer (63.4 - 97.9), CaCO3 powders (1 - 30), emulsifier (1 - 6), and initiator (0.1 - 0.6). The nano powders have inorganic CaCO3 as cores and organic olefin polymer as shells in spherical or elliptical ball with granular size distribution <100nm as well as high grafting rate and characteristics prepared by high grafting efficiency. |
Claim： |
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