Method for preparing an organopolysiloxane compound and curing composition using the compound

• US 8,592,499 B2
• Filed: 11/23/2012
• Issued: 11/26/2013
• Est. Priority Date: 11/29/2011
• Status: Active Grant

• Current Assignee: Shin-Etsu Chemical Company Limited
• Original Assignee: Shin-Etsu Chemical Company Limited
• Inventors: Araki, Tadashi, Sakamoto, Takafumi
• Primary Examiner(s): ZIMMER, MARC S
• Application Number:
  US13/684,376
• Publication Number:
  US 20130137792A1
• Time in Patent Office: 368 Days
• Field of Search: None
• US Class Current: 522/99
• CPC Class Codes: C08G 77/26 nitrogen-containing groups
• CPC Class Codes: C08K 3/36 Silica
• CPC Class Codes: C08L 83/08 containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
• CPC Class Codes: C09D 183/08 containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen

Abstract

A method for preparing an organopolysiloxane compound by mixing (A) an organopolysiloxane of the formula (1):

wherein R¹ is a monovalent hydrocarbon group and may be the same or different, R is a divalent hydrocarbon group, and n is an integer of at least 2, with (B) an organic compound of the formula (2) or (3):

wherein R² is H or a monovalent hydrocarbon and R³ is a divalent hydrocarbon and (C) an organic compound of the formula (4):

wherein R¹ and R³, respectively, have the same meanings as defined above, R⁴ is a monovalent hydrocarbon group, and p is 0 or 1, wherein components (A), (B) and (C) are reacted with one another under conditions that a ratio between an amino group equivalent P_NH in component (A) and an isocyanate group equivalent P_NCO in components (B) and (C) is such that 0.8≦(P_NCO/P_NH) and a molar ratio between component (B) and component (C) is such that 0.6≦[component (B)/component (C)].

Claims

1. A method for preparing an organopolysiloxane compound, which comprising mixing (A) an organopolysiloxane of the following formula (1):

2. A curing composition comprising:

(D) 100 parts by weight of an organopolysiloxane compound obtained by the preparation method of claims 1;

(E) 0.01 to 10 parts by weight of a photopolymerization initiator;

(F) 0.01 to 10 parts by weight of a curing catalyst; and

(G) 1 to 30 parts by weight of a silane represented by the following general formula (5) or a partial hydrolyzate thereof,

R⁵_4-rSiK_r 

 

(5)

wherein R⁵ is an unsubstituted or substituted monovalent hydrocarbon group having 1 to 10 carbon atoms, K is a hydrolyzable group, and r is an integer of 2 to 4.

3. The curing composition of claim 2, further comprising 0.1 to 100 parts by weight of (H) fumed silica per 100 parts by weight of component (A).

4. A part bonded and/or sealed with a cured product of the curing composition defined in claim 2 or 3.