发明名称 Viscoelastic silicon rubber compositions
摘要 The invention provides for new viscoelastic silicone rubbers and compositions and methods for making and using them. The invention provides for viscoelastic silicone rubbers that are stiffer on short timescales than they are on long timescales. When subjected to brief stresses, they are relatively stiff and elastic, and they resist changing shapes. When subjected to sustain stresses, however, they are relatively soft and accommodating, and they gradually change shapes. When those stresses are removed, they gradually return to their original shapes. These viscoelastic silicone rubbers resist compression set and they are extremely resilient in response to sudden impacts. They can be dense rubbers, foam rubbers, and particles.
申请公布号 US9550864(B2) 申请公布日期 2017.01.24
申请号 US201214237715 申请日期 2012.08.10
申请人 UNIVERSITY OF VIRGINIA PATENT FOUNDATION 发明人 Bloomfield Louis A.
分类号 C08G77/38;C08G77/20;C08L83/04;C08K5/5425;C08G77/16;C08K3/38 主分类号 C08G77/38
代理机构 J.A. Lindeman & Co., PLLC 代理人 J.A. Lindeman & Co., PLLC
主权项 1. A viscoelastic silicone rubber composition comprising: (a) at least one polyorganosiloxane; (b) at least one permanent crosslinking agent present in an amount to provide sufficient permanent crosslinks to give the composition an equilibrium shape when cured; (c) at least one temporary crosslinking agent present in an amount to provide sufficient temporary crosslinks to give the composition a stiffness when cured that is greater on short timescales than it is on long timescales; and (d) at least one softening agent present in an amount sufficient to make the average lifetime of the temporary crosslink of shorter duration than the average lifetime of the temporary crosslink in the absence of the softening agent.
地址 Charlottesville VA US