Sacrificial binders for molding particulate solids and the molding thereof
US4158688A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1977 |
| Grant date | Jun 19, 1979 |
| Priority date | — |
| Expiry date | Jun 27, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L53/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Improvements in molded articles from sinterable particulate solids, improvements in method for making such articles, and novel sacrificial binders for use in making such articles are disclosed. The sacrificial binders used in this invention comprise block polymers having the structural formula EQU X--[B (AB).sub..eta. A].sub..eta.' wherein "X" is a linking group, A or B, ".eta." is 0 or a positive integer, ".eta.'" is a positive integer greater than 2, "A" is a linear or branched polymer that is glassy or crystalline at room temperature and has its softening point in the range of about 80.degree. C. to about 250.degree. C. and "B" is a polymer different from A that behaves as an elastomer at processing temperatures, a plasticizer which may be oil, wax or oil and wax, and optionally other components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.