Polymeric binder

Details Polymeric binder Polymeric binder

1994-03-21

1997-02-04

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526291, 5263285, 526330, 526342, 526347, 264 60, C08F22400, C08F22606, C08F21400, C08F22010, C08F21804, C08F22044

Patent

active

055998909

ABSTRACT:
A polymeric binder for ceramic materials is provided. The polymeric binder has a temperature range for pyrolysis which is broader than that for polymeric binders conventionally used in ceramic materials. The broader pyrolysis range provides for gradual removal of the binder when a ceramic part containing the binder is heated. Gradual removal of the binder minimizes the formation of voids and cracking in the ceramic part. Voids or cracking can lead to defects in the part, and destruction of the part may occur during removal if a polymeric binder used in the part is rapidly decomposed into gases. Therefore the polymeric binder of the present invention provides for ceramic parts with fewer defects and less chance of destruction than occurs with polymeric binders conventionally used in ceramic parts.

REFERENCES:
patent: 4199400 (1980-04-01), Bakule et al.
patent: 4336345 (1982-06-01), Lewis et al.
patent: 5019537 (1991-05-01), Kato et al.
patent: 5278251 (1994-01-01), Ohtani et al.
"Investigations into the Burning-Out of Organic Substances in the Ceramic Body", C. Locher, E. Pfaff, P. Schulz and C. Zografou, NASA Technical Memorandum #TM-77065, Jun. 1983.
"Pyrolysis Behavior of Acrylic Polymers and Acrylic Polymer/Ceramic Mixtures", Y. -N Sun, M. D. Sacks, and J. W. Williams, Ceramic Transactions, ED., L. G. Messing, E. R. Fuller and H. Hausner, vol. 1, pp. 538-548, Pub. American Ceramics Society, 1988.

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