Silicone compounds and process for producing the same

• US 6,284,858 B1
• Filed: 09/14/1999
• Issued: 09/04/2001
• Est. Priority Date: 03/14/1997
• Status: Expired due to Term

• Current Assignee: Nippon Steel & Sumikin Chemical Co., Ltd. (Nippon Steel Corporation)
• Original Assignee: Nippon Steel Chemical Company Limited (Nippon Steel Corporation), Nippon Steel Corporation
• Inventors: Furukawa, Nobuyuki, Fujiyama, Takeshi, Teramoto, Takero
• Primary Examiner(s): Dawson, Robert
• Assistant Examiner(s): Robertson, Jeffrey B
• Application Number:
  US09/381,045
• Time in Patent Office: 721 Days
• Field of Search: 528/12, 528/33, 528/38, 528/43, 525/474, 525/477, 556/462, 556/455, 556/429, 556/425
• US Class Current: 528/12
• CPC Class Codes: C08G 77/04 Polysiloxanes
• CPC Class Codes: C08G 77/20 containing silicon bound to unsaturated aliphatic groups C08G77/045 takes precedence
• CPC Class Codes: C08G 77/22 containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen C08G77/045 takes precedence

Abstract

This invention relates to silicone compounds in which terminal SiO of cage-type and/or ladder-type polyphenylsilsesquioxanes is wholly or partly linked to a triorganosilyl group containing reactive functional group X and also relates to a process for preparing said silicone compounds by subjecting cage-terminated and silanol-free cage-type and/or ladder-type polyphenylsilsesquioxanes to an equilibrium reaction under heat with disiloxanes containing reactive functional group X of the following structural formula

in an organic solvent in the presence of an alkaline rearrangement and condensation catalyst. This invention provides silicone compounds containing terminal reactive functional groups of excellent storage stability and properties of good reproducibility such as heat resistance.

Claims

1. A process for preparing silicone compounds in which Si—

O—

at the end of the molecular chain of silanol-free cage and/or ladder polyphenylsilsesquioxanes represented by formula (1);

wherein n is an integer from 2 to 5000,

is linked to at least one triorganosilyl group containing reactive functional group X represented by formula (2);

wherein

X is selected from the group consisting of

(A) CH₂═

CH—

,

(B) CH₂═

C(R₄)—

COO—

R₃—

,

(C)

—

CH₂—

O—

R₃—

,

(D) H₂N—

R₃—

,

(E) HO—

R₃—

, and

(F) HS—

R₃—

,

R₃ is an alkylene group containing 1 to 3 carbon atoms, and

R₄ is a hydrogen atom or a methyl group,

said process comprising;

subjecting cage-terminated and silanol-free cage and/or ladder polyphenylsilsesquioxanes to an equilibrium reaction under heat with a disiloxane containing reactive functional groups represented by formula (3);

wherein X is the same as defined above, in an organic solvent in the presence of an alkaline rearrangement and condensation catalyst.

2. The process according to claim 1, wherein one or more silicone compounds selected from the group consisting of ladder, cage, and unilaterally cage-terminated ladder polyphenylsilsesquioxanes are present, and wherein said silicone compounds each possess a weight average molecular weight M_w of 800 to 1000000 when determined by GPC with polystyrene as a standard.