US 10,246,598 B2Granted

Manufacture method of quantum dots printing ink and quantum dots printing ink manufactured with the manufacture method

AssigneeShenzhen China Star Optoelectronics Technology Co., Ltd.

InventorYawei Liu

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Abstract

Disclosed are a manufacture method of quantum dots printing ink and manufactured quantum dots printing ink manufactured with the manufacture method. In the manufacture method, by mixing the first solvent and the second solvent, the viscosity of the quantum dots printing ink is adjusted to be in a predetermined range. Then, by mixing the third solvent with the first and second solvent, the surface tension thereof is adjusted to be in a predetermined range while maintaining the viscosity to be in the predetermined range. Furthermore, by adding the fourth solvent in the quantum dots printing ink, the vapor pressure is adjusted to be in a reasonable range. With mixture of kinds of solvents, the quantum dots printing ink of which the performance indicators, the viscosity, the surface tension, the dry condition are suitable for jet ink printing can be formulated to avoid adding the surfactant in the ink.

Claims7

Dependent claims

A manufacture method of quantum dots printing ink, comprising steps of:

step 1, providing quantum dots material and first solvent, and mixing the quantum dots material and the first solvent, together in uniform dispersion to obtain first mixed solution;
step 2, providing second solvent, which is mutually dissolvable with the first solvent, and adding the second solvent in the first mixed solution according to a volume ratio that the first solvent and the second solvent is 1:2-2:1 in uniform mixture to obtain a second mixed solution, of which a viscosity is 1-10 cps;
step 3, providing third solvent, which is mutually dissolvable with the first solvent and the second solvent, and adding the third solvent in the second mixed solution according to a volume ratio that a sum of the first solvent and the second solvent, and the third solvent is 1:2-2:1 in uniform mixture to obtain the quantum dots printing ink, of which a viscosity is 1-10 cps, and a surface tension is 30-40 dyne/cm;
and
step 4, providing fourth solvent, which is mutually dissolvable with the first solvent, the second solvent and the third solvent, and adding the fourth solvent in the quantum dots printing ink according to a volume ratio that the fourth solvent and a sum of the first solvent, the second solvent and the third solvent is smaller than 1/9 in uniform mixture, so as to adjust a room temperature vapor pressure of the quantum dots printing ink under 100 mmHg as maintaining the viscosity of the quantum dots printing ink to be 1 -10 cps, and the surface tension to be 30-40 dyne/cm;
wherein the first solvent is monoethylene glycol;
the second solvent is 1-butanol;
the third solvent is pyrrolidinone;
the fourth solvent is propylene glycol propyl ether.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/108,321Filed 26 Apr 2016
Priority: CN 2016 1 017632924 Mar 2016
Published: US 2018/0100079 A112 Apr 2018
Granted: 2 Apr 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification19 codes

C09D 11/50
Inks: sympathetic, colour changing or similar inks
C09D 11/033
Characterised by features other than the chemical nature of the binder: characterised by the solvent
C09D 11/037
Characterised by features other than the chemical nature of the binder: characterised by the pigment
C09D 11/322
Characterised by colouring agents: pigment inks