公开(公告)号：EP0812326A1

公开(公告)日：1997-12-17

申请号：EP96944852.0

申请日：1996-12-27

申请人： KURPLE, Kenneth R.

发明人： KURPLE, Kenneth R.

IPC分类号： C07G1 ,  C08G18 ,  C08H5 ,  C08L71 ,  C08L97

CPC分类号： C08H6/00 ,  C07G1/00 ,  C08G18/6492 ,  C08G2101/00 ,  C08L71/02 ,  C08L97/005 ,  C08L2666/26

摘要： Certain lignins which are readily available from pulping processes function as a polyol component of an isocyanate system to make foams and urethane plastics. Use of the lignin in this manner provides moisture and flame resistance and produces products having sufficient rigidity. The sodium level must be controlled so that the reaction between the hydroxyl groups and the isocyanates produces products with the optimal properties.

公开(公告)号：EP0920477A1

公开(公告)日：1999-06-09

申请号：EP97938638.0

申请日：1997-08-26

申请人： KURPLE, Kenneth R.

发明人： KURPLE, Kenneth R.

IPC分类号： C07G1 ,  C07G99 ,  C08L67 ,  C08L71 ,  C08L97

CPC分类号： C08L97/005 ,  C07G17/004 ,  C08L67/00 ,  C08L71/02 ,  C08L2666/26

摘要： Ligning and polyether glycol produces a product which has a distinct melt point and melt viscosity. This has a plasticizing effect wherein the polyether glycol can be thought of as the hard resin. When 20 parts of polyether glycol are processed with 80 parts of lignin a new material which has a melt point and a viscosity is created whereas lignin itself has no melt and flow characteristics. The new modified lignin can be cured with hexamine like a phenolic resin.

公开(公告)号：EP0777541A1

公开(公告)日：1997-06-11

申请号：EP95922151.0

申请日：1995-06-06

申请人： KURPLE, Kenneth R.

发明人： KURPLE, Kenneth R.

IPC分类号： B22C1 ,  B29C33 ,  C08G18 ,  C09J175

CPC分类号： B22C1/2293 ,  B22C1/02 ,  B22C1/2273 ,  C08G18/4081 ,  C08G18/6492

摘要： A process for making foundry cores and molds is disclosed as well as the core and molds which are produced as well as a sand binder. The binder is a resin which includes a lignin dissolved in a suitable solvent reacted and/or cured with an isocyanate material. The lignin used contains no more than 2 % sodium ions. A polyether polyol may be added which has a functionality of greater than 3 and preferably at least 6. A tin catalyst is disclosed for use in the system which has a valence of +4 and one soluble in the system. A material is added to the system to give the mold or core a resistance to the water in core and mold washes. Suitable materials are propylene oxide derivatives of bis phenol A.

公开(公告)号：EP0408574B1

公开(公告)日：1995-06-07

申请号：EP89902603.3

申请日：1989-02-14

申请人： KURPLE, Kenneth R.

发明人： KURPLE, Kenneth R.

IPC分类号： B22C1/20

CPC分类号： C08G18/6492 ,  B22C1/162 ,  B22C1/2273 ,  B22C1/2286 ,  B22C1/2293

摘要： A process for making sand cores or molds is disclosed; the completed cores and molds as well as a binder for holding the sand particles together. The resin binder is used in the process and in the finished product comprising lignin dissolved in a suitable solvent reacted on or cured with an isocyanate material. Curing can be accomplished by the use of an amine along with a catalyst if desired. A polyether polyol may be integrated with the lignin to vary the physical characteristics of the binder.

公开(公告)号：EP0408574A1

公开(公告)日：1991-01-23

申请号：EP89902603.0

申请日：1989-02-14

申请人： KURPLE, Kenneth R.

发明人： KURPLE, Kenneth R.

IPC分类号： B22C1 ,  C08G18

CPC分类号： C08G18/6492 ,  B22C1/162 ,  B22C1/2273 ,  B22C1/2286 ,  B22C1/2293

摘要： Procédé de fabrication de noyaux ou de moules en sable; noyaux et moules complétés et liants pour maintenir ensemble les particules de sable. Le liant résineux est utilisé pendant le procédé et dans le produit fini qui contient de la lignine dissoute dans un solvant approprié et mise à réaction ou durcie avec un matériau isocyanate. On peut obtenir le durcissement en utilisant une amine avec un catalyseur. On peut intégrer un polyol de polyéther dans la lignine afin de modifier les caractéristiques physiques du liant.