Synthesis and properties of nickel borate acylate as a new rubber-steel cord adhesion promoter |
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Authors: | Li Xiao-ru Nie Xi-du Wu Hai-ying and Cheng Ben-cheng |
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Affiliation: | (1) College of Chemistry and Chemical Engineering, Central South University, 410083 Changsha, China;(2) Hengyang Branch of Hunan University, 412000 Hengyang, China |
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Abstract: | The synthetic method of nickel borate acylate (NBA), a kind of rubber-steel cord adhesion promoter (AP), through nickel carbonate,
borate and mixed carboxylic acid was studied. The preparation of nickel carbonate could be performed through reaction of nickel
sulfate with sodium carbonate in aqueous solution, in which fractional conversion of nickel was more than 99.9%. The mixed
nickel carboxylate was prepared by the reaction of nickel carbonate with isooctanoic acid and acetic acid, under strong stirring
for 2 h, the mole ratio of these chemicals were 1:1:1.1 respectively, and water should be removed completely by adding of
inert organic solvent after reaction was finished so as to avoid hydrolysis of tributyl borate in the second reaction. NBA
was synthesized by reaction of mixed nickel carboxylate with tributyl borate under strong stirring at 200–250 °C for 6 h.
By detection and comparison with 680C product from Manobond Company of England, the NBA synthesized through isooctanoic acid
and tributyl borate was very similar to product 680C in IR data, 300% fixed extension strength, tensile strength, hardness
and cure curve, and was slightly lower than those of product 680C in tensile failure extensibility and hot air aging. The
experimental results show that the prepared NBA can be used as rubber-steel cord AP.
Foundation item: Science Fund of Science and Technology Commission of Hunan Province (No. 01-962-50-2)
Biography of the first author: LI Xiao-ru, doctor, associate professor, born in 1963, majoring in organic synthesis and natural product chemistry. |
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Keywords: | nickel borate acylate adhesion promoter nickel carbonate borate |
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