发明名称 |
Diamine/diol chain extender blends for rim process |
摘要 |
A chain extending agent for reaction injection molding (RIM) comprising a normally liquid blend of butanediol and a toluene diamine mono-substituted with an electron withdrawing group and having the formula <IMAGE> wherein X is vicinal to an amino radical and is selected from the group of halogen, CN, NO2, acyl, carboxylate and isomeric mixtures thereof, and wherein the butanediol and diamine are combined in a critical mole ratio of from 4:1 to about 19:1. The above blend is particularly useful in the preparation of large moldings of polyurethane-polyurea elastomer by the RIM or RRIM (reinforced reaction injection molding) process wherein instant preformed blend is added to a mixture of polyol reactant and catalyst before polymerization in the mold with isocyanate to produce a urethane/urea polymer product of improved properties. Accordingly, the invention also concerns an enhanced RIM or RRIM process and improved product by the use of a mixture of the present chain extender blend and polyol reactant maintainable in the liquid state at ambient temperature.
|
申请公布号 |
US4549007(A) |
申请公布日期 |
1985.10.22 |
申请号 |
US19840672211 |
申请日期 |
1984.11.16 |
申请人 |
GAF CORPORATION |
发明人 |
LIN, I. SIOUN;GROMELSKI, JR., STANLEY J.;WERNER, JESSE;BROWN, MICHAEL J.;CHAKRABARTI, PARITOSH M. |
分类号 |
C08G18/32;C08G18/38;C08G18/65;(IPC1-7):C08G18/32;C08G18/14 |
主分类号 |
C08G18/32 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|