US 2022/0064368 A1 · PREPARATION METHOD OF CARDANOL-MODIFIED POLYAMINE CURING AGENT WITH HIGH CORROSION RESISTANCE

Abstract

The present invention discloses a preparation method of a cardanol-modified polyamine curing agent with high corrosion resistance. The method includes the following steps: subjecting cardanol, paraformaldehyde and an amine compound to Mannich reaction, after the Mannich reaction, adding a water-soluble initiator for polymerization reaction, then evaporating water and excessive amine compound under reduced pressure after the polymerization reaction, thus obtaining a cardanol-modified polyamine curing agent. The coating obtained by curing the curing agent with an epoxy resin has greatly improved chemical resistance and corrosion resistance, indicating that the use of the water-soluble initiator in this present invention enables olefins to be polymerized very well, and molecules are reinforced obviously after polymerization, thereby greatly improving the chemical resistance and corrosion resistance.

Claims9

Dependent claims

A preparation method of a cardanol-modified polyamine curing agent with high corrosion resistance, characterized in that the method comprises the following steps:

subjecting cardanol, paraformaldehyde and an amine compound to Mannich reaction, after the method comprises reaction, adding a water-soluble initiator for olefin polymerization reaction, and evaporating water and excessive amine compound under reduced pressure after the polymerization reaction, thus obtaining a cardanol-modified polyamine curing agent with high corrosion resistance;
wherein, the cardanol has the following structural formula:

Dependencies are inferred from the claim text.

Facts

Application

17/523,886Filed 10 Nov 2021

Priority

CN 202010602702.229 Jun 2020

Published

3 Mar 2022

Term ends

Not estimatedThe source records don’t support an estimate.

Classification14 codes

C08G 59/5033
Amines: aromatic
C07C 39/19
Monocyclic with unsaturation outside the aromatic ring: containing carbon-to-carbon double bonds but no carbon-to-carbon triple bonds
C07C 213/08
Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same…: by…
C07C 215/50
With amino groups linked to the six-membered aromatic ring, or to the condensed ring system containing that ring, by carbon chains not further…:…

Preparation method of cardanol-modified polyamine curing agent with high corrosion resistance

Life of this patent

Preparation method of cardanol-modified polyamine curing agent with high corrosion resistance

Life of this patent

Abstract

Claims9