| 摘要 |
1483697 Dental cement compositions SHOFU DENTAL MFG CO Ltd 20 Aug 1975 34640/75 Heading C3P Dental cements are formed from one or more metal oxides and/or silicon oxide and a resin which is a copolymer of 3-butene-1,2,3-tricarboxylic acid and an α,#-olefinically unsaturated monocarboxylic acid, especially acrylic or methacrylic acid. Other monomers may be included in the copolymer. In examples, the metal oxide is a mixture of oxides of Zn/Mg or of Al/Zn/Mg/Bi. |
