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Citation: BAI Ruo-Fei, FU Xiang-Kai, GONG Yong-Feng, ZOU Kuang-Dong, FU Dan. Preparation of Microcapsules Containing Initiator for Anaerobic Adhesive by in situ polymerization[J]. Chinese Journal of Applied Chemistry, ;2007, 24(6): 693-697. shu

Preparation of Microcapsules Containing Initiator for Anaerobic Adhesive by in situ polymerization

BAI Ruo-Fei ^a,b ,
FU Xiang-Kai ^a,b,c,, ,
GONG Yong-Feng ^a,b ,
ZOU Kuang-Dong ^a,b ,
FU Dan ^a,b

1.
a Research Institute of Applied Chemistry, College of Chemistry and Chemical Engineering, Southwest University;
2.
b The Key Laboratory of Applied Chemistry of Chongqing Municipality;
3.
c The Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), Chongqing 400715

Corresponding author: FU Xiang-Kai,
Received Date: 16 July 2006
Available Online: 20 October 2006

Microcapsules containing initiator for anaerobic adhesive by in situ polymerization in which urea-formaldehyde resin was used as the wall material and benzoyl peroxide was used as the core material.The influences of different kinds of emulsifiers such as sodium dodecylben-zenesulfonate,tween-80,gum arabic and styrene-maleic anhydride and other process conditions on the preparation of microcapsulation were investigated,and IR,TG and SEM were used to analyse the microcapsules.When the microencapsulation was conducted in a system modified by multiple emulsifiers,i.e.,the mixture of styrene-maleic anhydride copolymer and gum arabic,the end point pH value was at around 1.5,the reaction temperature was 70℃,the reaction time was 4 h,and the agitation rate was of 1 000 r/min,the microcapsules were dispersed moderately in size,with good shape and appearance,and the diameter was about 100 μm.The performance of the precoating type adhesive made up of the microcapsules prepared in this article could match that of the ones made by Loctite Company in America.
- in situ polymerization,
- anaerobic adhesive,
- microcapsule,
- urea-formaldehyde resin,
- emulsifier
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