| 摘要 |
<p>A silacyclobutene compound (I) having a vinylic group attached to the third ring position is new. A silacyclobutene compound of formula (I) having a vinylic group attached to the third ring position is new: [Image] R1> and R2>chloro, triorganosiloxy, organooxy, triorganosilyl or a monovalent hydrocarbon group; R3>a monovalent hydrocarbon group free of conjugated aliphatic unsaturation or triorganosilyl; R5>H or a monovalent hydrocarbon group free of conjugated aliphatic unsaturation; and R4> and R6>H, or a monovalent hydrocarbon group free of conjugated aliphatic unsaturation or together are an alkanediyl group where the alkanediyl group and the carbon atoms to which it is attached form 4-7C carbocyclic ring. Independent claims are included for: (1) the preparation of (I); and (2) a silane or a siloxane polymer containing at least one silacyclobutene unit, of formula (II): [Image] T : CH3 or O1/2; W' : R7>a or R8>; R7>R1>; a : 0 or 1; R8>R1>, OH or -O-; when T : CH3, W = R7>a and When T = O1/2, W = R8>.</p> |
