公开(公告)号：US11254780B2

公开(公告)日：2022-02-22

申请号：US16575503

申请日：2019-09-19

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Te-Chao Liao ,  Sen-Huang Hsu ,  Chia-Lung Tsai

IPC: C08G18/08 ,  C08G18/38

Abstract: A method for preparing an aqueous polyurethane dispersion includes the following steps. The method characterized in that it introduces an ethoxy group to sodium ethylenediamine sulfonate (H2N—CH2CH2NHCH2CH2SO3Na) serving as an anionic chain extender to form sodium ethylenediamino ethoxyethyl sulfonate (H2NCH2CH2NHCH2CH2OCH2CH2SO3Na). Next, hydrophilic groups of sodium ethylenediamino ethoxyethyl sulfonate are used to prepare an aqueous polyurethane to improve the flowability of the resin, in which the polyurethane prepolymer has an isocyanate group at its end. More than one acrylate monomer is used for dilution and reduction of viscosity, and hydrophilic and amine groups containing sulfonate is used for water dispersion and to carry out a chain extension reaction. After that, an initiator is added for acrylic polymerization, so as to modify polyurethane with graft acrylic.

公开(公告)号：US10676562B2

公开(公告)日：2020-06-09

申请号：US15291138

申请日：2016-10-12

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Te-Chao Liao ,  Sen-Huang Hsu ,  Chia-Lung Tsai

IPC: C08G18/08 ,  C08G18/10 ,  C08G18/32 ,  C08G18/62 ,  C08G18/75 ,  C08G18/66 ,  C08G18/48 ,  C09D175/04 ,  C08F283/00

Abstract: A process for preparing solvent-free aqueous polyurethane dispersion modified with acrylic grafting is divided into four steps. The first step is a reaction of a diisocyanate with a polyol to prepare a prepolymer; the second step involves diluting the prepolymer with an acrylate monomer and adding a sulfonate-based chain extender to react; the third step involves adding deionized water and a water-soluble diamine-based chain extender to obtain a solvent-free sulfonate-based aqueous polyurethane dispersion; and the fourth step involves letting the aqueous polyurethane become modified with acrylic grafting. The resulting aqueous polyurethane has excellent mechanical strength, heat resistance and water resistance.

公开(公告)号：US11639414B2

公开(公告)日：2023-05-02

申请号：US17378904

申请日：2021-07-19

Applicant: NAN YA PLASTICS CORPORATION

Inventor： Te-Chao Liao ,  Sen-Huang Hsu ,  Chia-Lung Tsai

IPC: C08G18/10 ,  C08G18/08 ,  C08G18/67 ,  C08G18/42 ,  C08F290/06 ,  C08G18/66 ,  C08G18/32 ,  C08G18/48 ,  C08G18/40 ,  C08G18/12 ,  C08G18/75 ,  D06N3/14 ,  C08F283/00

Abstract: A water-based polyurethane resin and a method for manufacturing the same are provided. The method for manufacturing the water-based polyurethane includes: a preparation step of a prepolymer, a dilution step of the prepolymer, a water dispersion and chain extension step, and an acrylic synthesis step. The method further includes mixing polyol and polyisocyanate to obtain a prepolymer, and diluting the prepolymer by adding acrylic monomer in the prepolymer. In the water-based polyurethane resin, at least one of the polyhydric alcohol, polyisocyanate, and the acrylic monomer includes a compound with a cyclic structure.