Rapid cure polysulfide coatings for cavitation resistance, erosion resistance, and sound damping

Patent metadata

Field	Value
Publication number	US-9828508-B2
Application number	US-201514691716-A
Country	US
Kind code	B2
Filing date	Apr 21, 2015
Priority date	Apr 21, 2015
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

A polysulfide coating composition includes an aliphatic, aromatic or cycloaliphatic material with at least 2 thiol groups; an aliphatic, aromatic or cycloaliphatic, acryl, polyester or polysiloxane-based material with at least two epoxy groups; and a catalyst. The coating provides a durable cavitation- and erosion-resistant coating for the rudders of ships, and is also suitable for sound-damping applications.

First claim

What is claimed is:

1. A polysulfide coating composition comprising:
an aliphatic or cycloaliphatic material comprising a thiocarbamate linkage and at least 2 thiol groups;
an aliphatic, aromatic or cycloaliphatic, acryl, polyester or polysiloxane-based material with at least two epoxy groups;
a polyamide polymer; and
a catalyst.

2. The coating composition of claim 1 , wherein said aliphatic, aromatic or cycloaliphatic, acryl, polyester or polysiloxane-based material has at least one epoxy group.

3. The coating composition of claim 1 , wherein said catalyst is an aliphatic amine, cycloaliphatic amine, aromatic amine, or a Lewis Acid.

4. The coating composition of claim 1 , further comprising a pigment and/or a filler.

5. The coating composition of claim 1 , wherein the composition contains no solvent.

6. The composition of claim 1 , wherein the composition provides cavitation and erosion resistance for rudders.

7. The coating composition of claim 1 , wherein the composition provides sound damping.

8. A polysulfide coating composition comprising:
an aliphatic or cycloaliphatic material comprising a thiocarbamate linkage and at least 2 thiol groups;
an aliphatic, aromatic or cycloaliphatic, acryl, polyester or polysiloxane-based material with at least two epoxy groups;
a polyamide polymer; and
a tertiary amine catalyst.

9. The coating composition of claim 8 , further comprising a pigment and/or a filler.

10. The coating composition of claim 8 , wherein the composition contains no solvent.

11. The coating composition of claim 8 , wherein the composition provides sound damping.

12. The composition of claim 8 , wherein the composition provides cavitation and erosion resistance for rudders.

13. A polysulfide coating composition comprising:
a thiol-terminated material comprising a thiocarbamate linkage and at least two reactive thiol groups and an aliphatic, cycloaliphatic or aromatic backbone, selected from the group consisting of adducts of trimethylolpropane tris(3-mercaptopropionate) with 1,6-hexamethylenediisocyanate (HDI), trimethylolpropane tris(3-mercaptopropionate) with isophorone diisocyanate (IPDI), trimethylolpropane tris(3-mercaptopropionate) with meta-tetramethylxylylene diisocyanate (TMXDI), trimethylolpropane tris(3-mercaptopropionate) with methylene diphenyl diisocyanate (MDI), and trimethylolpropane tris(3-mercaptopropionate) with polyisocyanates based on HDI and IPDI;
diglycidyl ether of hydrogenated Bisphenol A (Hydrogenated DGEBA); and
a catalyst.

Assignees

• Iezzi Erick B
• Us Navy

Inventors

• Iezzi Erick B

Classifications

• C08L77/00

  Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain (of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08); Compositions of derivatives of such polymers · CPC title

• C08G59/66

  Mercaptans · CPC title

• C08G59/24

  carbocyclic · CPC title

• C08G59/686

  containing nitrogen · CPC title

• C09D5/08 Primary

  Anti-corrosive paints · CPC title