Process for preparing a triazine-based precursor, the precursor prepared thereby, a method for producing a micro-particulate complex using the precursor, and the micro-particulate complex produced thereby

Patent metadata

Field	Value
Publication number	US-11299504-B2
Application number	US-202016988775-A
Country	US
Kind code	B2
Filing date	Aug 10, 2020
Priority date	Aug 15, 2017
Publication date	Apr 12, 2022
Grant date	Apr 12, 2022

Abstract

A process for preparing a triazine-based precursor for producing a micro-particulate complex containing a far infrared-emissive silica particle comprises steps of: a) subjecting 2-4-6-trichloro-1,3,5-triazine and a first nucleophilic compound to a displacement reaction in the presence of a first solvent at a first temperature range to form an intermediate; and b) subjecting the intermediate and a second nucleophilic compound to a further displacement reaction in the presence of a second solvent at a second temperature range higher than the first temperature range.

First claim

What is claimed is:

1. A method for producing a micro-particulate complex containing a far infrared-emissive silica particle, comprising a step of subjecting a triazine-based precursor represented by Formula (a) and tetra-alkyl orthosilicate to hydrolysis and polycondensation,

wherein
each X is a nucleophilic atom independently selected from the group consisting of N, O, and S;
Xs are different from each other;
each R 1 is independently selected from the group consisting of H and C 1 -C 22 linear or branched unsubstituted alkyl;
R 2 represents C 2 -C 4 alkylene;
each R 3 independently represents C 1 -C 2 alkyl; and
each n is independently 1 or 2,
with the proviso that
X is O or S and R 1 is not H when n is 1, and
X is N and at least one R 1 is not H when n is 2.

2. The method according to claim 1 , wherein the tetra-alkyl orthosilicate is tetraethyl orthosilicate.

Assignees

• Univ Nat Chi Nan
• Great Chain Chemical Ltd

Inventors

• Lai Long-Li
• Lee Cheng-Hua
• Tong Jhih-Yuan
• Lu Yan-Chih
• Lin Yu-You
• Chang Ya-Lin

Classifications

• C07F7/1804 Primary

  Compounds having Si-O-C linkages (Si-O-acyl linkages C07F7/1896) · CPC title

• C07D251/70

  Other substituted melamines · CPC title

• C07D251/52 Primary

  with an oxygen or sulfur atom attached to the third ring carbon atom · CPC title

• C07D251/54

  Three nitrogen atoms · CPC title

• C07F7/1892

  by reactions not provided for in C07F7/1876 - C07F7/1888 · CPC title