Fast moisture curing and UV-moisture dual curing compositions

• US 7,368,519 B2
• Filed: 10/15/2003
• Issued: 05/06/2008
• Est. Priority Date: 10/23/2002
• Status: Active Grant

• Current Assignee: Henkel AG & Co KGaA
• Original Assignee: Henkel Corporation (Henkel AG & Co KGaA)
• Inventors: Chu, Hsien-Kun
• Primary Examiner(s): Zimmer; Marc S.
• Application Number:
  US10/524,542
• Publication Number:
  US 20050267276A1
• Time in Patent Office: 1,665 Days
• Field of Search: None
• US Class Current: 528/34
• CPC Class Codes: C08G 77/12 containing silicon bound to hydrogen C08G77/045 takes precedence
• CPC Class Codes: C08G 77/16 to hydroxyl groups
• CPC Class Codes: C08G 77/18 to alkoxy or aryloxy groups
• CPC Class Codes: C08G 77/20 containing silicon bound to unsaturated aliphatic groups C08G77/045 takes precedence
• CPC Class Codes: C08G 77/24 halogen-containing groups
• CPC Class Codes: C08G 77/38 Polysiloxanes modified by chemical after-treatment C08G77/045 takes precedence
• CPC Class Codes: C08K 5/0025 Crosslinking or vulcanising agents; including accelerators
• CPC Class Codes: C08K 5/0091 Complexes with metal-heteroatom-bonds
• CPC Class Codes: C08K 5/07 Aldehydes; Ketones
• CPC Class Codes: C08K 5/31 Guanidine; Derivatives thereof
• CPC Class Codes: C08K 5/541 containing oxygen
• CPC Class Codes: C08K 5/5425 containing at least one C=C bond
• CPC Class Codes: C08L 101/10 containing hydrolysable silane groups
• CPC Class Codes: C08L 2666/44 Silicon-containing compounds
• CPC Class Codes: C08L 83/04 Polysiloxanes

Abstract

The invention provides fast moisture and photo/moisture curing silicone compositions and methods for the preparation thereof. More particularly, the compositions provided are prepared from silanol and silane cappers; the cappers have an α-carbon bonded to the silicon atom allowing for a favorable hypervalent silicon transition state when reacting the silane and silanol. This favorable transition state enables both a fast endcapping reaction and contributes to the fast moisture curing properties of the inventive compositions.

Claims

1. A curable composition comprising:

a) a compound having the structural formula;

2. The composition according to claim 1, wherein said curable composition is a dual cure photo/moisture curable composition.

3. The method according to claim 2, wherein R is alkenyl, which may be substituted or unsubstituted.

4. The composition according to claim 1, wherein said curable composition is a moisture curable composition.

5. The method according to claim 4, wherein R is a C_1-20 alkyl which is optionally substituted.

6. The method according to claim 4, wherein R is a methyl group.

7. The composition according to claim 1, wherein X is O.

8. The composition according to claim 1, wherein R² is an alkoxy group having the formula R⁴O- wherein R⁴ is a C_1-2 alkyl group.

9. The composition according to claim 1 wherein R is

10. The composition according to claim 1 wherein A is a polysiloxane.

12. The curable composition of claim 11 or claim 1 wherein said reaction product has a skin over time when exposed to curingly effective conditions of 15 minutes or less.

13. The curable composition of claim 12 wherein said reaction product has a skin over time when exposed to curingly effective conditions of 5 minutes or less.

11. A composition comprising

(a) a compound having the structural formula