发明名称 |
METHOD FOR PREPARING A SILICA SUSPENSION IN A SILICONE MATRIX CROSSLINKABLE BY POLYCONDENSATION TO FORM ELASTOMERS |
摘要 |
The invention concerns a method for preparing a silica suspension in a silicone matrix, said suspension capable of being used for producing organopolysiloxanes crosslinkable by polycondensation. The invention aims at seeking a technical compromise between the rheology of said compositions and the mechanical properties of the resulting crosslinked elastomers. As a solution, the invention discloses a method for preparing a silica suspension treated with organosilazane in a silicone material comprising a linear reactive polyorganosiloxane bearing for example at each chain end a hydroxy group. The invention is characterised in that it consists essentially in introducing the organosilozane in the preparation medium: before and/or substantially simultaneously before bringing together at least part of the silicone material and the particulate filler used, said organosilozane introduction being carried out with a fraction of organosilazane corresponding to a proportion ranging between 8 % and 30 % by dry weight relatively to the silica filler, and after bringing together the filler and all or part of the silicone material. |
申请公布号 |
WO0037549(A1) |
申请公布日期 |
2000.06.29 |
申请号 |
WO1999FR03212 |
申请日期 |
1999.12.21 |
申请人 |
RHODIA CHIMIE;CANPONT, DOMINIQUE;HOWE, FABIENNE;POUCHELON, ALAIN |
发明人 |
CANPONT, DOMINIQUE;HOWE, FABIENNE;POUCHELON, ALAIN |
分类号 |
C08J3/05;C08K3/36;C08K9/06;C08L83/06 |
主分类号 |
C08J3/05 |
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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