发明名称 |
USE OF SPECIFIC SILICAS FOR INCREASING THE RIGIDITY OF A THERMOPLASTIC WHILE MAINTAINING OR IMPROVING ITS IMPACT RESISTANCE |
摘要 |
The invention relates to the use of a silica having a BET specific surface of at least 60 m<SUP>2</SUP>/g for increasing the rigidity of a thermoplastic polymeric material while maintaining i.e. improving its impact resistance. The silica used is of the type obtained according to a method involving the drying of a silica suspension obtained by reacting a silicate with an acidulant according to the following successive steps: (i) forming an aqueous starter having a pH between 2 and 5; (ii) simultaneously adding silicate and the acidulant while keeping the pH between 2 and 5; (iii) continuing with only the addition of silicate until a pH between 7 and 10 has been reached; (iv) simultaneously adding silicate and acidulant while keeping the pH of the reaction medium between 7 and 10, and; (v) continuing with only the addition of the acidulant until a pH value lower than 6 has been obtained. The invention also relates to the materials obtained within this scope. |
申请公布号 |
WO2006072704(A3) |
申请公布日期 |
2006.09.28 |
申请号 |
WO2005FR03289 |
申请日期 |
2005.12.27 |
申请人 |
RHODIA CHIMIE;BOMAL, YVES;GUIU, ANTOINE |
发明人 |
BOMAL, YVES;GUIU, ANTOINE |
分类号 |
C08K3/36;C08J3/20;C08L23/12 |
主分类号 |
C08K3/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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