US 11,814,522 B2
One-part room-temperature curable compositions on the basis of organosilicon compounds and titanium curing catalysts
Torsten Sixt, Mehring (DE); and Jian Nie, Shanghai (CN)
Assigned to WACKER CHEMIE AG, Munich (DE)
Filed by WACKER CHEMIE AG, Munich (DE)
Filed on Dec. 22, 2021, as Appl. No. 17/558,651.
Application 17/558,651 is a continuation of application No. 16/346,377, abandoned, previously published as PCT/CN2016/104014, filed on Oct. 31, 2016.
Prior Publication US 2022/0112376 A1, Apr. 14, 2022
Int. Cl. C08L 83/06 (2006.01); C08G 77/16 (2006.01); C08K 3/36 (2006.01); C08K 5/00 (2006.01); C08K 5/5419 (2006.01); C08K 5/56 (2006.01)
CPC C08L 83/06 (2013.01) [C08G 77/16 (2013.01); C08K 3/36 (2013.01); C08K 5/0025 (2013.01); C08K 5/5419 (2013.01); C08K 5/56 (2013.01); C08L 2312/00 (2013.01)] 22 Claims
 
1. A one-part room-temperature curable composition, comprising:
(A) at least one organosilicon compound containing condensable groups;
(B) at least one curing agent composition, comprising:
(B)(i) at least one compound having the formula (IV):
R′Si(OOCR″)3  (IV)
wherein
R′ each is the same or different and is C3-C6 alkyl, and
R″ each is the same or different and is C1-C6 alkyl, and
optionally,
(B)(ii) an additional curing agent other than the compound having the formula (IV), said additional compound having the formula (III):
ZcSiR1(4-c)  (III)
wherein
R1 each is identical or different and is a monovalent, unsubstituted or substituted hydrocarbon radical, wherein one or more carbon atoms of the hydrocarbon radical are optionally replaced with oxygen atoms,
Z each is identical or different and is a condensable radical, and
c is 2, 3 or 4;
(C) at least one curing catalyst comprising an organotitanium compound
wherein the organotitanium compound has the formula (V):
Ti(OR′″)4  (V)
wherein R′″ each is the same or different and is C1-C10 alkyl; and
(D) at least one filler;
wherein curing agent composition (B) comprises at least 60 wt. % of compounds having the formula (IV), based on the total weight of the curing agent composition-, and wherein the curable composition is free of organotin compounds;
wherein the curing agent composition (B) further comprises condensates of two or more molecules of the compound having the formula (III), of the compound having the formula (IV)
R′Si(OOCR″)3  (IV)
wherein
R′ each is the same or different and is C3-C6 alkyl, and
R″ each is the same or different and is C1-C6 alkyl,
or mixtures thereof.