Gypsum compositions for gypsum-thermoplastic composite |
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| 申请号 | US30879372 | 申请日 | 1972-11-22 | 公开(公告)号 | US3873492A | 公开(公告)日 | 1975-03-25 |
| 申请人 | JAPAN ATOMIC ENERGY RES INST; | 发明人 | TAKEHISA MASAAKI; KURIHARA HIRONDO; YAGI TOSHIAKI; WATANABE HIROMASA; MACHI SUEO; | ||||
| 摘要 | A gypsum composition having affinity for a thermoplastic resin is obtained by adhering a polysulfone resins to the surface of a gypsum powder. The composition is suitable for preparing a gypsum-thermoplastic resin composite. | ||||||
| 权利要求 | 1. A METHOD OF IMPARTING PROPERTIES SUITABLE FOR PREPARING A GYPSUM - THERMOPLASTIC RESIN COMPOSITE TO A GYPSUM POWDER, COMPRISING ADHERING A POLYSULFONE RESIN TO THE SURFACE OF EACH PARTICLE OF SAID POWDER, SAID POLYSULFONE RESIN BEING A POLYMER HAVING -SO2- GROUPS IN THE MAIN POLYMERIC CHAIN THEREOF AND BEING A REACTION PRODUCT OF SO2 AND A MONOMER SELECTED FROM THE GROUP CONSISTING OF OLEFINS OF 2-12 CARBON ATOMS, STYRENE, VINYL CHLORIDE, ALLYL CHLORIDE, AND COMBINATIONS THEREOF. 2. A method in accordance with claim 1, in which said polysulfone resin is adhered to the surface of the gypsum by copolymerizing sulfur dioxide and said monomer on the surface of the gypsum powder. 3. A method in accordance with claim 1, in which said polysulfone resin is adhered to the surface of the gypsum by treating the surface of the gypsum powder with a solution of said polysulfone resin. 4. A method in accordance with claim 1, in which said polysulfone resin is adhered to the surface of the gypsum by treating the surface of the gypsum powder with a solution of said polysulfone resin in at least one unreacted monomer selected from an olefin, a vinyl monomer, an allyl compound monomer and sulfur dioxide. 5. A method in accordance with claim 1, in which said monomer is an olefin monomer having 2-12 carbon atoms. 6. A method in accordance with claim 5 in which said olefin is an Alpha -olefin having from 2-8 carbon atoms. 7. A gypsum composition having increased affinity for thermoplastic resins, which can be used for preparing a gypsum-thermoplastic resin composite, comprising a gypsum powder and a polysulfone resin adhered to the surface of each particle of said powder, said polysulfone resin being a polymer having -SO2-groups in the main polymeric chain thereof and being a reaction product of SO2 and a monomer selected from the group consisting of olefins of 2-12 carbon atoms, styrene, vinyl chloride, allyl chloride, and combinations thereof. 8. A gypsum composition in accordance with claim 7 in which said monomer is an olefin monomer having 2-12 carbon atoms. 9. A gypsum composition in accordance with claim 8 in which said olefin is an Alpha -olefin having from 2-8 carbon atoms. 10. A gypsum-thermoplastic resin composite comprising a mixture of a gypsum composition in accordance with claim 7 and a polyolefin said polyolefin being present in an amount of 95-5% by weight gypsum in the resultant composite. 11. A method of producing the gypsum-thermoplastic resin composite of claim 10 comprising blending said gypsum with said polyolefin in an amount of 95-5% by weight gypsum in the resulting composite. |
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