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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9403853 B1

PDFFull Text
Date of Patent:
Aug. 02, 2016

Filed:

Sep. 09, 2013

Trimethylolpropane core, phosphonic acid terminated dendrimer and its preparation method

Applicant:

Tongji University, Shanghai, CN;

Inventors:

Bingru Zhang, Shaghai, CN;

Fengting Li, Shanghai, CN;

Hongmei You, Shanghai, CN;

Assignee:

Tongji University, Shanghai, CN;

Attorney:
Primary Examiner:

Joseph Drodge

Assistant Examiner:

Clare Perrin

Int. Cl.
CPC ...
C07F 9/22 (2006.01); C07F 9/28 (2006.01); C02F 5/12 (2006.01); C02F 5/14 (2006.01); B01D 65/02 (2006.01); B01D 65/08 (2006.01); C07F 9/38 (2006.01); C07F 9/40 (2006.01); C02F 1/00 (2006.01); C02F 5/10 (2006.01); C02F 1/44 (2006.01); C02F 103/02 (2006.01); C02F 103/10 (2006.01);
U.S. Cl.
CPC ...
C07F 9/3817 (2013.01); B01D 65/08 (2013.01); C02F 5/14 (2013.01); C07F 9/3843 (2013.01); C07F 9/4009 (2013.01); B01D 2321/16 (2013.01); B01D 2321/168 (2013.01); C02F 2103/023 (2013.01); C02F 2103/10 (2013.01); C02F 2303/22 (2013.01); C07F 9/3847 (2013.01);
Abstract

A trimethylolpropane core, phosphonic acid terminated dendrimer and its preparation method are provided, And a preparation method thereof comprises steps of processing Michael addition reaction on trimethylolpropane triacrylate (CHCHC(CHOCOCH═CH)) and alkylidene diamine (NHCH(CH)NH), wherein n is an integer from 1 to 5, so as to obtain trimethylolpropane core, amino group terminated dendrimer, and modifying the amino group by methylene phosphonic acid to obtain the trimethylolpropane core, phosphonic acid terminated dendrimer having a chemical formula of CHCHC[CHOCOCHCHN(CHPOH)CH(CH)N(CHPOH)], wherein n is an integer from 1 to 5. The trimethylolpropane core, phosphonic acid terminated dendrimer has high calcium tolerance, and excellent inhibiting efficiency of calcium carbonate, calcium sulfate and barium sulfate, which is applied in inhibiting the formation and deposition in industrial water systems of circulating cooling water, oilfield flooding and reverse osmosis, and particularly suitable for water treatment with high calcium tolerance.

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