合成ゴム用の新しい反応性炭酸カルシウムについて

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書誌事項

タイトル別名
  • METHODS OF MANUFACTURE OF ACTIVE CALCIUM CARBONATES AND REINFORCING EFFECTS TO SYNTHETIC RUBBER
  • ゴウセイ ゴムヨウ ノ アタラシイ ハンノウセイ タンサン カルシウム ニ ツイテ
  • PREPARATION OF CALCIUM CARBONATE ACTIVATED WITH UNSATURATED FATTY ACID FOR REINFORCING SBR ANDNBR

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抄録

Following the previous papers1)2), some new active calcium carbonates were studied for reinforcement of SBR and NBR. These active calcium carbonates were prepared by introducing carbon dioxide gas into aqueous calcium hydroxide containing active agents.<br>Unsaturated fatty acids used for the active agents were maleic acid, fumaric acid, crotonic acid, methacrylic acid, sorbic acid etc. Because, the carboxyl groups of fatty acid are reactive to calcium carbonate while the double bonds of unsaturated fatty acid are reactive to rubber molecule.<br>SBR and NBR vulcanizates loaded with the active calcium carbonates had extremely high tensile strength and modulus. Maleic acid, maleic anhydrid, crotonic acid and sorbic acid indicated good physical properties. Sorbic acid was the most efficient of all unsaturated fatty acid. The 300% modulus (300%M.) and the tensile strength at break (T.S.) on SBR loaded with 100phr of the active calcium carbonate reached as high as 39kg/cm2. and 207kg/cm2., respectively. On the other hand, those of the vulcanizate loaded with the conventional carbonate indicated only 24kg/cm2. and 79kg/cm2., respectively. And the 300%M. and T.S. on NBR reached as high as 85kg/cm2. and 220kg/cm2., respectively. On the other hand, those of the vnlcanizate loaded with the conventional carbonate indicated only 42kg/cm2. and 102kg/cm2., respectively.

収録刊行物

  • 日本ゴム協会誌

    日本ゴム協会誌 36 (3), 295-303, 1963

    一般社団法人 日本ゴム協会

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