	US 11,952,689 B2
	Viscosity modified formaldehyde-free binder compositions and methods
Zhihua Guo, Ottawa Hills, OH (US); Uranchimeg Lester, Littleton, CO (US); Jawed Asrar, Englewood, CO (US); Kiarash Alavi, Littleton, CO (US); and Mingfu Zhang, Highlands Ranch, CO (US)
Assigned to Johns Manville, Denver, CO (US)
Filed by JOHNS MANVILLE, Denver, CO (US)
Filed on Sep. 4, 2020, as Appl. No. 17/012,471.
Application 17/012,471 is a division of application No. 13/675,414, filed on Nov. 13, 2012, granted, now 10,815,593.
Prior Publication US 2020/0407896 A1, Dec. 31, 2020
Int. Cl. D04H 1/64 (2012.01); C08K 7/14 (2006.01); C08L 3/02 (2006.01); C08L 61/20 (2006.01); C08L 61/24 (2006.01); C08L 61/32 (2006.01); C09J 101/28 (2006.01); C09J 103/02 (2006.01); C09J 105/00 (2006.01); D04H 1/4218 (2012.01); D04H 1/4242 (2012.01); D04H 1/587 (2012.01); D04H 13/00 (2006.01); D21H 13/40 (2006.01); D21H 17/20 (2006.01); D21H 23/48 (2006.01)

CPC D04H 13/008 (2013.01) [C08K 7/14 (2013.01); C08L 3/02 (2013.01); C08L 61/20 (2013.01); C08L 61/24 (2013.01); C08L 61/32 (2013.01); C09J 101/28 (2013.01); C09J 101/286 (2013.01); C09J 103/02 (2013.01); C09J 105/00 (2013.01); D04H 1/4218 (2013.01); D04H 1/4242 (2013.01); D04H 1/587 (2013.01); D04H 1/64 (2013.01); D21H 13/40 (2013.01); D21H 17/20 (2013.01); D21H 23/48 (2013.01); Y10T 442/604 (2015.04)]

16 Claims

1. A process of making a non-woven glass fiber mat, the process comprising the steps of:

forming an aqueous dispersion of fibers;

passing the aqueous dispersion through a mat forming screen to form a wet mat;

applying a carbohydrate binder composition to the wet mat to form a binder-containing wet mat; and

curing the binder-containing wet mat to form the non-woven glass fiber mat,

wherein the carbohydrate binder composition comprises a carbohydrate, a nitrogen-containing compound, and a thickening agent, and wherein the carbohydrate binder composition has a Brookfield viscosity of 7 to 50 centipoise at 20° C. as measured with a Brookfield viscometer using spindle 18 at 60 rpm.