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US 2017/0058073 A1Published application
Synthesis and application of formaldehyde free melamine glutaraldehyde amino resin as an effective retanning agent
AssigneesCOMSATS Institute of Information Technology, GC University
InventorsRashid SALEEM, Ahmad ADNAN, Fahim Ashraf QURESHI
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Abstract
A method of synthesizing a resin including mixing a first solution including a melamine compound with a second solution including glutaraldehyde to form a third solution, heating the third solution to 35° C. to 90° C. in at a pH above 7 for 5 to 70 minutes, and cooling the third solution to room temperature.
Claims15
A method of synthesizing a resin, comprising:
- mixing a first solution comprising a melamine compound with a second solution comprising glutaraldehyde to form a third solution;
- heating the third solution to 35° C. to 90° C. in at a pH above 7 for 5 to 70 minutes;
- and
- cooling the third solution to room temperature.
1 more element
A resin, comprising:
- a compound represented by Chemical Formula 1, which is as follows:
- wherein the resin excludes formaldehyde.
A tanned leather, comprising,
- a tear-strength parallel to a backbone of the tanned leather of more than 496 Newton per centimeter (N/cm);
- a tear-strength perpendicular to the backbone of the tanned leather of more than 630 N/cm;
- a distension at grain cracking of the tanned leather of more than 7.35 millimeter (mm);
- a distention at burst of the tanned leather of more than 10.75 mm;
- a tensile strength parallel to the backbone of the tanned leather of more than 1420 Newton per square centimeter (N/cm2);
- a tensile strength perpendicular to the backbone of more than 1514 N/cm2;
- a percent elongation perpendicular of more than 41;
- and
- a free-formaldehyde content of 0.
6 more elements
A composition, comprising:
- an aqueous solution comprising:
- a chemical oxygen demand (COD) of less than 15320 parts per million (ppm);
- a total solids content of less than 20678 ppm;
- a COD based emission load of less than 21.21 kilogram per ton (kg/ton) of a shaved hide;
- a total solids based emission load of less than 28.63 kg/ton,
- wherein the aqueous solution is waste water from tanning leather.
3 more elements
Dependencies are inferred from the claim text.