	US 12,146,041 B2
	Melamine-formaldehyde foams and manufacturing method thereof
Panseok Seo, Busan (KR); Youngdo Park, Busan (KR); Byungyoun Gwack, Busan (KR); Sunghun Kim, Busan (KR); and Gakgyu Choi, Busan (KR)
Assigned to DONGSUNG CHEMICAL Co., Ltd., Busan (KR)
Filed by DONGSUNG CHEMICAL Co., Ltd., Busan (KR)
Filed on Feb. 25, 2022, as Appl. No. 17/680,805.
Claims priority of application No. 10-2021-0027763 (KR), filed on Mar. 2, 2021.
Prior Publication US 2022/0282055 A1, Sep. 8, 2022
Int. Cl. C08J 9/14 (2006.01); B29C 44/34 (2006.01); C08G 12/32 (2006.01); C08J 9/00 (2006.01); B29K 61/00 (2006.01)

CPC C08J 9/146 (2013.01) [B29C 44/3442 (2013.01); C08G 12/32 (2013.01); C08J 9/0033 (2013.01); B29K 2061/00 (2013.01); C08J 2361/28 (2013.01)]

6 Claims

1. A melamine-formaldehyde foam, prepared by comprising a melamine-formaldehyde condensate having:

a weight average molecular weight in a range of 1000 to 10,000 g/mol,

a solid content in a range of 60 to 80 percent by weight (wt %), and

a viscosity in a range of 1000 to 10,000 cps,

wherein a cell size of the melamine-formaldehyde foam is in a range of 30 to 300 μm,

a standard deviation of the cell size is in a range of 0 to 40 μm, and

a cell thickness is 10 μm or less.