发明名称 |
METHOD FOR PREPARING PRECIPITATED SILICON DIOXIDE, PRECIPITATED ZINC-CONTAINING SILICON DIOXIDES, AND USE THEREOF OF REINFORCING ELASTOMERS |
摘要 |
FIELD: chemical industry. SUBSTANCE: silicon dioxide is prepared by reacting alkali metal silicate with acidifying agent using zinc compound and subsequently separating and drying the product. The reacting silicon dioxide has specific surface of 90-250 sq.m/g, oil absorption of lower than 300 ml/100 g. Pore distribution is such that pore volume formed by pores with diameters of 175-275 <EMI ID=0.267 HE=6 WI=3 TI=CHI> is less than 50% of pore volume formed by pores with diameters less or equal to 400 <EMI ID=0.268 HE=6 WI=3 TI=CHI>; zinc content is 1-5 wt %; number of silicon dioxide surface, when stearic acid is made to react with said silicon dioxide in xylene at 120 C for 2 hours. The resulting silicon dioxide makes it possible to obtain satisfactory rheological properties of elastomer and improve mechanical properties thereof. EFFECT: improved rheological properties of elastomers. 39 cl, 3 ex, 4 tbl
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申请公布号 |
RU2130896(C1) |
申请公布日期 |
1999.05.27 |
申请号 |
RU19960124772 |
申请日期 |
1996.03.28 |
申请人 |
RON-PULENK SHIMI |
发明人 |
IV BOMAL';IVONIK SHEVAL'E;EHVELIN PRAT |
分类号 |
C01B33/193;C08K3/36;C08K9/00;C08L21/00;C09C1/30;(IPC1-7):C01B33/193 |
主分类号 |
C01B33/193 |
代理机构 |
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主权项 |
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地址 |
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