01-03-2018 дата публикации
Номер: US20180057630A1
Автор:
CHO Yoo Kon,
CHOI Kwon Yong,
HAN Kug Hun,
JEONG Dong Woo,
JUNG Soon Joon,
KANG Seok Nam,
KIM Kyung Sam,
KIM Mu Young,
KIM Sang Ho,
LEE Hoon Bok,
LEE Sung Hoon,
LEE Sung Il,
Lim Byung Guk,
Park Sang Do
A polyurethane filter foam is provided herein. The polyurethane filter foam may have improved permeability by having both a small cell and a large cell in a range for maximizing the opening property of the foam. In some instance, this is achieved by specifically configuring and foaming a composition of polyether polyol and methylene diphenyl diisocyanate (MDI) to manufacture the polyurethane foam. The polyurethane foam of the present invention can be manufactured without performing a reticulation process. 1. A polyurethane filter foam manufactured by foaming (A) polyether polyol and (B) methylene diphenyl diisocyanate (MDI) , whereinthe (A) polyether polyol is a polyol resin mixture comprising (A-1) from about 10 to 40 wt % of difunctional polyether polyol having a hydroxyl value of from about 20 to 100 mgKOH/g; (A-2) from about 10 to 50 wt % of trifunctional polyether polyol having a hydroxyl value of 20 to 100 mgKOH/g; and (A-3) from about 10 to 50 wt % of hexafunctional polyether polyol having a hydroxyl value of 5 from about 0 to 100 mgKOH/g, andthe (B) methylene diphenyl diisocyanate (MDI) is an isocyanate mixture comprising (B-1) from about 10 to 80 wt % of MDI monomers; (B-2) from about 0.1 to 20 wt % of carbodiimide modified MDI having a weight average molecular weight of from about 250 to 350 g/mol, (B-3) from about 10 to 50 wt % of polymeric MDI having a weight average molecular weight of from about 300 to 400 g/mol, and (B-4) from about 0.1 to 50 wt % of MDI prepolymer having a weight average molecular weight of from about 250 to 1,000 g/mol prepared by prepolymerizing the MDI monomers and the polyether polyol.2. The polyurethane filter foam of claim 1 , wherein the (B) methylene diphenyl diisocyanate (MDI) is included with from about 40 to 70 parts by weight based on 100 parts by weight of the (A) polyether polyol.3. The polyurethane filter foam of claim 1 , wherein the (A-1) difunctional polyether polyol is prepared by adding an ethylene oxide (EO) or ...
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