Perfluoropolyether gem-diphosphate compound, surface treating agent, using method and article

Abstract

The invention relates to a perfluoropolyether gem-diphosphate compound. The general formula of the perfluoropolyether gem-diphosphate compound is shown in the specification. In a general formula (A) or a general formula (B), Rf is shown in the specification: in Rf, p, q and r are respectively integers from 0 to 200, and the sum of p, q and r is greater than or equal to 1; the existence sequence of -CF2-, -C3F6O-, -C2F4O-and -CF2O- in Rf is arbitrary, s is an integer from 1 to 3, t is 0 or 1, and Z is a fluorine atom or trifluoromethyl; x1 is -(CH2) a-, ortho, meta or p-phenylene, or ortho, meta or p-benzylidene, X2 is -(CH2) b-, ortho, meta or p-phenylene, or ortho, meta or p-benzylidene; R1 and R2 are respectively independent and are alkyl or aryl of which the number of H atoms and carbon atoms is 1-10; and Q is one or more of -O-, -S-, -C (O) O-, -CONR3- and -O-CONR3- groups. A treatment layer formed on the surface of a base material by the perfluoropolyether gem-diphosphate compound provided by the invention has good hydrophobic and oleophobic properties, anti-fouling properties, low friction coefficient, wear resistance and durability. The invention further provides a surface treating agent, a using method and an article.

Description

technical field [0001] This application relates to the technical field of surface treatment, in particular to a perfluoropolyether gem-diphosphate compound, a surface treatment agent, a method of use, and an article. Background technique [0002] Organic phosphate compounds can react with metals or nonmetals to form P-O-substrate bonds, thereby forming a treatment layer on the metal or nonmetal surface and improving the anticorrosion ability of the metal or nonmetal surface. Perfluoropolyether has the characteristics of low surface energy, long molecular chain and good flexibility, so the phosphoric acid compound containing perfluoropolyether prepared by combining organic phosphoric acid compound and perfluoropolyether is used as a metal or non-metal surface treatment agent When used, the treatment layer formed on the metal or non-metal surface has the properties of hydrophobic and oleophobic, anti-fouling, low coefficient of friction, durability and so on. [0003] But an ...

AI Technical Summary

Problems solved by technology

[0005] It contains organophosphoric acid and perfluoropolyether, which are applied to the mica sheet. The above compounds form a treatment layer with anti-fouling function on the mica sheet, but the static contact angle of water of the treatment layer is only 85°, and the anti-fouling effect of the treatment layer is only 85°. Dirt performance is poor

[0006] Existing US8945712 B2 discloses another composition comprising perfluoropolyether and organophosphoric acid, both perfluoropolyether and organophosphoric acid contain unsaturated double bonds, the composition is applied to a chrome-plated substrate, and the obtained The static contact angle of water in the treatment layer is only 98°. At the same time, when the dust-free cloth is worn more than 200 times, the static contact angle of water drops below 80°. The durability is not good, and the application range is small, which is difficult to be used in industrial manufacturing. Implement the application

Images