Fast moisture curing and uv-moisture dual curing compositions

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 83/04 (2006.01) C08G 77/20 (2006.01) C08J 3/28 (2006.01) C08K 5/54 (2006.01) C08L 83/07 (2006.01) C08L 101/10 (2006.01) C08K 5/541 (2006.01) C08K 5/5425 (2006.01) C08K 5/544 (2006.01)

Patent

CA 2499186

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 .alpha.-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.

L'invention concerne des compositions de silicone de séchage photo/humidité et de séchage rapide et procédés de préparation de ces compositions. Plus particulièrement, les compositions sont préparées à partir de protecteurs de silanol et de silane; ces protecteurs possédant un carbone .alpha. lié à l'atome de silicium ce qui permet un état de transition du silicium hypervalent favorable lors de la mise en réaction du silane et du silanol. Cet état de transition favorable permet à la fois une réaction de protection d'extrémité rapide et contribue aux propriétés de séchage d'humidité rapide des compositions de l'invention.

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