Sizing composition

• US 6,465,559 B1
• Filed: 10/30/2000
• Issued: 10/15/2002
• Est. Priority Date: 10/30/2000
• Status: Expired due to Fees

• Current Assignee: Crompton Corporation (Lanxess AG)
• Original Assignee: Crompton Corporation (Lanxess AG)
• Inventors: Chang, Biau-Hung, Ilmenev, Pavel, Bechara, Ibrahim
• Primary Examiner(s): SANDERS, KRIELLION ANTIONETTE
• Application Number:
  US09/699,813
• Time in Patent Office: 715 Days
• Field of Search: 524/539, 524/478, 524/487
• US Class Current: 524/487
• CPC Class Codes: C03C 25/326 Polyureas; Polyurethanes

Abstract

A sizing composition which includes an anionic or cationic polyurethane dispersion, a polyolefin wax and a coupling agent.

Claims

1. A sizing composition comprising a polyurethane dispersion, said polyurethane dispersion being a reaction product of a prepolymer and a chain extender, said prepolymer being a reaction product of a hydroxylated polymer, said hydroxylated polymer selected from the group consisting of a polyether polyol, a polyester polyol and mixtures thereof, a hydroxylated polyalkadiene, a polyisocyanate, a hydroxylated compound having a pendent acid group and, optionally, an ester of a fatty acid having about 12 to about 20 carbon atoms containing hydroxyl groups;

a polyolefin wax; and

a coupling agent.

3. A sizing composition in accordance with claim 1 or 2 wherein said coupling agent is a silane, methacrylate chromic chloride or titanium acetyl acetonate.

4. A sizing composition in accordance with claim 3 wherein said coupling agent is a silane, said silane selected from the group consisting of aminosilanes and epoxysilanes.

5. A sizing composition in accordance with claim 1 wherein said polyolefin wax is a carboxylated polyolefin.

7. A sizing composition in accordance with claim 5 wherein said carboxylated polyolefin is selected from the group consisting of carboxylated polyethylene, carboxylated polypropylene and mixtures thereof.

9. A sizing composition in accordance with claim 1 or 2 wherein said hydroxylated polymer is a polyether polyol, said polyether polyol selected from the group consisting of polyethylene glycol and polypropylene glycol.

10. A sizing composition in accordance with claim 1 or 2 wherein said hydroxylated polymer is a polyester polyol, said polyester polyol selected from the group consisting of poly(hexamethylene adipate/isophthalate) glycol and poly(hexamethylene orthophthalate) glycol.

11. A sizing composition in accordance with claim 1 or 2 wherein said hydroxylated polyalkadiene is partially or fully hydrogenated.

12. A sizing composition in accordance with claim 1 wherein said hydroxylated polyalkadiene is a hydroxylated polybutadiene.

13. A sizing composition in accordance with claim 1 or 2 wherein said polyisocyanate is an aliphatic diisocyanate.

14. A sizing composition in accordance with claim 1 or 2 wherein said chain extender is an amine compound.

15. A sizing composition in accordance with claim 1 or 2 wherein said optional ester containing about 12 to 20 carbon atoms containing hydroxyl groups is present and is glycerol monostearate.

16. A sizing composition in accordance with claim 1 wherein said hydroxylated compound having a pendent acid group is selected from the group consisting of a hydroxylated compound having a pendent carboxylic or a hydroxylated compound having a pendent sulfonic acid.

17. A sizing composition in accordance with claim 16 wherein said hydroxylated compound having a pendent acid group is selected from the group consisting of dimethylolpropionic acid and bis-hydroxyethyl aminoethane sulfonic acid.

2. A sizing composition comprising a polyurethane dispersion, said polyurethane dispersion being a reaction product of an extended prepolymer, including a hydroxylated polymer selected from the group consisting of a polyether polyol, a polyester polyol and mixtures thereof, a hydroxylated polyalkadiene, a polyisocyanate, a bis(hydroxyalkyl) quaternary ammonium group-containing diol and, optionally, an ester of a fatty acid having about 12 to about 20 carbon atoms containing hydroxyl groups;

a polyolefin wax; and

a coupling agent.

6. A sizing composition in accordance with claim 2 wherein said polyolefin wax is a carboxylated polyolefin.

8. A sizing composition in accordance with claim 6 wherein said carboxylated polyolefin is selected from the group consisting carboxylated polyethylene carboxylated polypropylene and thereof.

18. A sizing composition in accordance with claim 2 wherein said bis(hydroxyalkyl) quaternary ammonium group-containing diol is N,N-dimethyl bis(hydroxyethyl) quaternary ammonium methane sulfonate.