发明授权
US5185420A Thermoplastic polyurethane elastomers and polyurea elastomers made using
low unsaturation level polyols prepared with double metal cyanide
catalysts
失效
使用由双金属氰化物催化剂制备的低不饱和度多元醇制备的热塑性聚氨酯弹性体和聚脲弹性体
- 专利标题： Thermoplastic polyurethane elastomers and polyurea elastomers made using low unsaturation level polyols prepared with double metal cyanide catalysts
- 专利标题（中）： 使用由双金属氰化物催化剂制备的低不饱和度多元醇制备的热塑性聚氨酯弹性体和聚脲弹性体
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申请号： US852430申请日： 1992-03-16
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公开(公告)号： US5185420A公开(公告)日： 1993-02-09
- 发明人: Curtis P. Smith , Maurice C. Raes , John W. Reisch , Kiran B. Chandalia , James M. O'Connor
- 申请人： Curtis P. Smith , Maurice C. Raes , John W. Reisch , Kiran B. Chandalia , James M. O'Connor
- 申请人地址： CT Cheshire
- 专利权人： Olin Corporation
- 当前专利权人： Olin Corporation
- 当前专利权人地址： CT Cheshire
- 主分类号： C08L75/08
- IPC分类号： C08L75/08 ; C08G18/10 ; C08G18/48 ; C08G18/65 ; C08G18/66 ; C08G65/26 ; C08L75/00
摘要：
This invention relates to a method of fabricating a thermoplastic elastomer which comprises the steps of: (a) fabricating a polyol having a molecular weight of between about 2,000 and about 8,000 and having a level of end group unsaturation of no greater than 0.02 milliequivalents per gram of polyol, said polyol being fabricated in the presence of a double metal cyanide catalyst, (b) reacting said polyol with a diisocyanate to produce an isocyanate-terminated prepolymer, and (c) reacting said isocyanate-terminated prepolymer with a difunctional isocyanato-reactive chain extender in a mold or in an extruder in order to produce an elastomer characterized by a hardness of between a Shore A hardness of about 50 and a Shore D hardness of about 65. Also claimed is the elastomer produced by the above method utilizing a one-shot technique.
公开/授权文献
- US5824894A Mass flowmeter and laminar flow elements for use therein 公开/授权日：1998-10-20
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