A silacyclobutene compound having the formula: ##STR1## wherein R.sup.1 and R.sup.2 are independently chloro, triorganosiloxy, organooxy, triorganosilyl, or a monovalent hydrocarbon group; R.sup.3 is a monovalent hydrocarbon group free of conjugated aliphatic unsaturation or triorganosilyl; R.sup.5 is hydrogen or a monovalent hydrocarbon group free of conjugated aliphatic unsaturation; and R.sup.4 and R.sup.6 are independently hydrogen or a monovalent hydrocarbon group free of conjugated aliphatic unsaturation or together are an alkanediyl group, wherein the alkanediyl group and the carbon atoms to which it is attached form a carbocyclic ring having 4 to 7 carbon atoms; provided that R.sup.3 is not aryl. Methods of preparing the silacyclobutene compounds, silane polymers containing at least one silacyclobutene unit, and siloxane polymers containing at least one silacyclobutene unit.
一种具有以下式子的
硅环丁烷化合物:##STR1## 其中R1和R2是独立的
氯、三有机
硅氧基、有机氧基、三有机
硅基或一价烃基;R3是不含共轭脂肪族不饱和的一价烃基或三有机
硅基;R5是氢或不含共轭脂肪族不饱和的一价烃基;而R4和R6是独立的氢或不含共轭脂肪族不饱和的一价烃基,或者一起是一个脂肪二烯基基团,其中脂肪二烯基基团和其附着的碳原子形成一个具有4至7个碳原子的碳环;前提是R3不是芳基。制备
硅环丁烷化合物的方法,包含至少一个
硅环丁烷单元的
硅烷聚合物和包含至少一个
硅环丁烷单元的
硅氧烷聚合物。