US 12,006,394 B2
Curable composition of low density
Klaas Mennecke, Lottstetten (DE); Daniele Rutz, Zürich (CH); Sara Stauber-Fedier, Dietlikon (CH); and Berzad Durmic, Zufikon (CH)
Assigned to SIKA TECHNOLOGY AG, Baar (CH)
Appl. No. 17/274,617
Filed by SIKA TECHNOLOGY AG, Baar (CH)
PCT Filed Oct. 2, 2019, PCT No. PCT/EP2019/076740
§ 371(c)(1), (2) Date Mar. 9, 2021,
PCT Pub. No. WO2020/070207, PCT Pub. Date Apr. 9, 2020.
Claims priority of application No. 18198456 (EP), filed on Oct. 3, 2018.
Prior Publication US 2022/0049045 A1, Feb. 17, 2022
Int. Cl. C08G 18/30 (2006.01); C08G 18/10 (2006.01); C08G 18/24 (2006.01); C08G 18/34 (2006.01); C08G 18/38 (2006.01); C08G 18/48 (2006.01); C08G 18/75 (2006.01); C08K 3/04 (2006.01); C08K 3/22 (2006.01); C08K 3/26 (2006.01); C08K 3/36 (2006.01); C08K 7/28 (2006.01)
CPC C08G 18/307 (2013.01) [C08G 18/10 (2013.01); C08G 18/242 (2013.01); C08G 18/341 (2013.01); C08G 18/3893 (2013.01); C08G 18/4845 (2013.01); C08G 18/755 (2013.01); C08K 3/04 (2013.01); C08K 3/22 (2013.01); C08K 3/26 (2013.01); C08K 3/36 (2013.01); C08K 7/28 (2013.01); C08G 2150/00 (2013.01); C08G 2170/00 (2013.01); C08G 2190/00 (2013.01); C08K 2003/2241 (2013.01); C08K 2003/265 (2013.01); C08K 2201/003 (2013.01)] 17 Claims
 
1. A moisture-curing composition comprising
a) at least one moisture-reactive polymer P in a proportion of 10% to 60% by weight, based on the total composition,
b) at least one inorganic filler F in a proportion of at least 9% by weight, based on the total composition, and
c) between 3% and 25% by weight, based on the total composition, of at least one type of hollow microsphere H,
wherein:
the composition has a density of less than 1.20 kg/L, and
the hollow microspheres H have:
a compressive strength, measured in accordance with ASTM D3102-72, of at least 2.5 MPa, and
a volume-based particle size D90, measured with a Coulter counter, of less than 100 μm.