Sponge for oil-water separation and composition for making the same
AssigneeChen Chi Hsiang Industry Limited
InventorsYu-Hsiang Liu, Shih-Chung Chen
Life of this patent
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Abstract
A sponge for oil-water separation, which is prepared by reacting a polyol blend with a polyisocyanate and graphene, in the presence of a catalyst, a foaming agent and a foam stabilizer. The polyol blend includes: a first polyol component having a hydroxyl number of 33 to 60 mg KOH/g and an oxyethylene content of 50 to 80 mol %; a second polyol component having a hydroxyl number of 80 to 300 mg KOH/g and having an oxyethylene content of 50 to 80 mol %; a graft polyol component having a hydroxyl number of 20 to 40 mg KOH/g; a tetrafunctional polyol component having a hydroxyl number of 350 to 650 mg KOH/g; and glycerol.
Claims20
A sponge for separation of oil and water, which is prepared by reacting (A) a polyol blend with (B) a polyisocyanate, in the presence of (C) graphene, (D) a catalyst, (E) a foaming agent and (F) a foam stabilizer;
- wherein said (A) polyol blend includes:
- a first polyol component having a hydroxyl number ranging from 33 mg KOH/g to 60 mg KOH/g and having an oxyethylene content ranging from 50 mol % to 80 mol %;
- a second polyol component having a hydroxyl number ranging from 80 mg KOH/g to 300 mg KOH/g and having an oxyethylene content ranging from 50 mol % to 80 mol %;
- a graft polyol component having a hydroxyl number ranging from 20 mg KOH/g to 40 mg KOH/g;
- a tetrafunctional polyol component having a hydroxyl number ranging from 350 mg KOH/g to 650 mg KOH/g;
- and
- glycerol,
- in which said first polyol component is present in an amount of from 30 to 70 wt % based on the total weight of said components (A), (D), (E), and (F).
A sponge for separation of oil and water, which is prepared by reacting (A) a polyol blend with (B) a polyisocyanate, in the presence of (C) graphene, (D) a catalyst, (E) a foaming agent, and (F) a foam stabilizer;
- wherein said (A) polyol blend includes:
- a first polyol component having a hydroxyl number ranging from 33 mg KOH/g to 60 mg KOH/g and having an oxyethylene content ranging from 50 mol % to 80 mol %;
- a second polyol component having a hydroxyl number ranging from 80 mg KOH/g to 300 mg KOH/g and having an oxyethylene content ranging from 50 mol % to 80 mol %;
- a graft polyol component having a hydroxyl number ranging from 20 mg KOH/g to 40 mg KOH/g;
- a tetrafunctional polyol component having a hydroxyl number ranging from 350 mg KOH/g to 650 mg KOH/g;
- and
- glycerol,
- in which said second polyol component is present in an amount of from 15 to 50 wt % based on the total weight of said components (A), (D), (E), and (F).
A sponge for separation of oil and water, which is prepared by reacting (A) a polyol blend with (B) a polyisocyanate, in the presence of (C) graphene, (D) a catalyst, (E) a foaming agent, and (F) a foam stabilizer;
- wherein said (A) polyol blend includes:
- a first polyol component having a hydroxyl number ranging from 33 mg KOH/g to 60 mg KOH/g and having an oxyethylene content ranging from 50 mol % to 80 mol %;
- a second polyol component having a hydroxyl number ranging from 80 mg KOH/g to 300 mg KOH/g and having an oxyethylene content ranging from 50 mol % to 80 mol %;
- a graft polyol component having a hydroxyl number ranging from 20 mg KOH/g to 40 mg KOH/g;
- a tetrafunctional polyol component having a hydroxyl number ranging from 350 mg KOH/g to 650 mg KOH/g;
- and
- glycerol,
- in which said graft polyol component is present in an amount of from 10 to 30 wt % based on the total weight of said components (A), (D), (E), and (F).
Dependencies are inferred from the claim text.