Claims
- 1. A method of preparing a shaped ceramic object wherein the improvement comprises incorporating in the spray dried ceramic powder a binder composition that comprises a copolymer comprising blocks of ethylene oxide and propylene oxide ether-linked to (1,2-ethandiyldinitrilo)tetrakis.
- 2. The method of claim 1 wherein the binder composition also contains a film forming polymer.
- 3. The method of claim 2 wherein the film forming polymer is a homopolymer or copolymer of N-vinylpyrrolidinone.
- 4. The method of claim 2 wherein the film forming polymer is a homopolymer or copolymer of vinyl alcohol.
- 5. The method of claim 1 that also comprises an antifoaming agent.
- 6. The method of claim 1 wherein the copolymer comprises 20-30 weight percent propylene oxide and 80-70 weight percent ethylene oxide.
- 7. The method of claim 1 wherein the molecular weight of the copolymer is in the range of about 5,000 to about 20,000.
Parent Case Info
This application is a division, of application Ser. No. 07/712,261, filed Jun. 7, 1991, now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4638029 |
Meschke et al. |
Jan 1987 |
|
4898902 |
Nagai et al. |
Feb 1990 |
|
Non-Patent Literature Citations (1)
Entry |
Chemical Abstract No. 120023w, 1990, American Chemical Society. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
712261 |
Jun 1991 |
|