Claims
- 1. A composition for ceramics molding which comprises 100 parts of ceramic powder and 0.2 to 20 parts of a water-soluble binder which comprises a polyvinyl alcohol-based water-soluble copolymer containing 20 to 90 mol% of vinyl alcohol units, said copolymer being obtained by saponifying a copolymer composed of a vinyl ester and at least one member selected from the group consisting of (meth)allyl alcohol, (meth)allyl acetate and dimethylallyl alcohol.
- 2. The composition as set forth in claim 1, wherein the vinyl ester is vinyl acetate.
- 3. The composition as set forth in claim 1, wherein the polyvinyl alcohol-based water-soluble copolymer contains 0.5 to 30 mol% of a structural unit which comprises at least one member selected from the group consisting of (meth)allyl alcohol units, (meth)allyl acetate unit and dimethylallyl alcohol unit.
- 4. The composition as set forth in claim 3, wherein the polyvinyl alcohol-based water-soluble copolymer contains 2 to 20 mol% of a structural unit which comprises at least one member selected from the group consisting of (meth)allyl alcohol unit, (meth)allyl acetate unit and dimethylallyl alcohol unit.
- 5. The composition as set forth in claim 1, wherein the polyvinyl alcohol-based water-soluble copolymer is obtained by saponifying a copolymer composed of a vinyl ester and (meth)allyl acetate.
- 6. The composition as set forth in claim 1, wherein the water-soluble binder is a water-soluble binder for sheet molding.
- 7. The composition as set forth in claim 1, wherein the water-soluble binder is a water-soluble binder for press molding.
- 8. A composition for ceramics molding which comprises 100 parts of ceramic powder and 3 to 40 parts of a hot-melt binder which comprises a polyvinyl alcohol-based copolymer having a softening point not more than 160.degree. C., said copolymer being obtained by saponifying a copolymer composed of a vinyl ester and at least one member selected from the group consisting of (meth)allyl alcohol, (meth)allyl acetate and dimethylallyl alcohol.
- 9. The composition as set forth in claim 8, wherein the vinyl ester is vinyl acetate.
- 10. The composition as set forth in claim 8, wherein the polyvinyl alcohol-based copolymer contains 20 to 80 mol% of vinyl alcohol units and 0.5 to 30 mol% of a structural unit which comprises at least one member selected from the group consisting of (meth)allyl alcohol unit, (meth)allyl acetate unit and dimethylallyl alcohol unit.
- 11. The composition as set forth in claim 8, wherein the polyvinyl alcohol-based copolymer is obtained by saponifying a copolymer composed of a vinyl ester and (meth)allyl acetate.
- 12. The composition as set forth in claim 8, wherein the polyvinyl alcohol-based copolymer has a softening point not more than 130.degree. C.
- 13. The composition as set forth in claim 8, wherein the hot-melt binder is a hot-melt binder for injection molding.
Priority Claims (4)
Number |
Date |
Country |
Kind |
60-211588 |
Sep 1985 |
JPX |
|
60-211589 |
Sep 1985 |
JPX |
|
60-211590 |
Sep 1985 |
JPX |
|
60-211591 |
Sep 1985 |
JPX |
|
Parent Case Info
This is a continuation of application Ser. No. 06/908,013, filed Sept. 16, 1986, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4492783 |
Tanaka et al. |
Jan 1985 |
|
Foreign Referenced Citations (6)
Number |
Date |
Country |
0116300 |
Aug 1984 |
EPX |
0020131 |
May 1967 |
JPX |
0063407 |
Jun 1978 |
JPX |
0138036 |
Oct 1979 |
JPX |
0249633 |
Sep 1968 |
SUX |
0743165 |
Jan 1956 |
GBX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
908013 |
Sep 1986 |
|