Siloxane resins
    4.
    发明授权
    Siloxane resins 失效
    硅氧烷树脂

    公开(公告)号:US06596404B1

    公开(公告)日:2003-07-22

    申请号:US10121971

    申请日:2002-04-15

    IPC分类号: B32B518

    摘要: This invention pertains to a siloxane resin composition comprising R1SiO3/2 siloxane units, R2SiO3/2 siloxane units and (R3O)bSiO(4-b)/2 siloxane units wherein R1 is an alkyl group having 1 to 5 carbons, hydrogen, or mixtures thereof; R2 is a monovalent organic group having 6 to 30 carbons; R3 is a branched alkyl group having 3 to 30 carbons, b is from 1 to 3; and the siloxane resin contains from 2.5 to 85 mole percent R1SiO3/2 units, 2.5 to 50 mole percent R2SiO3/2 units and 5 to 95 mole percent (R3O)bSiO(4-b)/2 units. The siloxane resin is useful to make insoluble porous resin and insoluble porous coatings. Heating a substrate coated with the siloxane resin at a sufficient temperature effects removal of the R2 and R3O groups to form an insoluble insoluble porous coating having a porosity of 1 to 60 volume percent and a dielectric constant in the range of 1.5 to 3.0.

    摘要翻译: 本发明涉及包含R1SiO3 / 2硅氧烷单元,R2SiO3 / 2硅氧烷单元和(R3O)bSiO(4-b)/ 2硅氧烷单元的硅氧烷树脂组合物,其中R 1是具有1至5个碳的烷基,氢或其混合物 的; R2是碳原子数为6〜30的一价有机基团, R3为碳数为3〜30的支链烷基,b为1〜3, 硅氧烷树脂含有2.5〜85摩尔%的R 1 SiO 3/2单元,2.5〜50摩尔%的R 2 SiO 3/2单元和5〜95摩尔%(R3O)bSiO(4-b)/ 2单元。 硅氧烷树脂可用于制造不溶性多孔树脂和不溶性多孔涂层。 加热涂有硅氧烷树脂的基材在足够的温度下除去R2和R3O基团,形成孔隙率为1至60体积%和介电常数在1.5至3.0范围内的不溶性不溶性多孔涂层。