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Novel Siloxane-Polyurethane Coatings for Anti-Fouling Applications

Technology Benefits

These NDSU coatings exhibit excellent adhesion and mechanical strength, and low surface energy, significantly improved over currently available silicone-based fouling release coatings.∩é╖ Coatings are self-stratifying (self-organize into two or more distinct layers uponapplication), with a low surface energy, low modulus top layer and a tougher lower layer.∩é╖ Potential commercial significance in applications related to marine antifouling coatings, anti-graffiti and others.

Detailed Technology Description

This NDSU invention is based on the synthesis of (PDMS) Polydimethylsiloxane-modified polyurethane coatings to generate coatings that have low surface energy under water due to the crosslinking, and are tough with good adhesion to various substrates. Multiple components were mixed and applied to the substrate where the solvent evaporated and crosslinking took place. Due to the low surface energy of the PDMS, it preferentially rises to the surface of the coating. However, due to the organo-functional end groups, it reacts with the isocyanate and becomes incorporated into the polymer network. This process creates a self-stratifying coating which separates into two or more distinct layers upon application; an outer layer with low surface energy and one or more durable lower layers.The PDMS component forms the top, low-energy layer, and the polyurethanecomponent forms the durable underlayer.

Supplementary Information

Patent Number: US8299200B2
Application Number: US2010663334A
Inventor: Webster, Dean C. | Ekin, Abdullah | Sommer, Stacy
Priority Date: 11 Jun 2007
Priority Number: US8299200B2
Application Date: 23 Jul 2010
Publication Date: 30 Oct 2012
IPC Current: C08G007726
US Class: 528038 | 528028
Assignee Applicant: NDSU Research Foundation,Fargo
Title: Anchored polysiloxane-modified polyurethane coatings and uses thereof
Usefulness: Anchored polysiloxane-modified polyurethane coatings and uses thereof
Summary: (I) is useful in coating composition, which is useful for inhibiting fouling on a surface exposed to aqueous conditions (all claimed) and in protecting boat hulls.
Novelty: Polymeric material prepared by reacting mixture comprising polyisocyanate, polyol and polysiloxane component, which has functional groups capable of reacting with polyisocyanate, useful in coating composition

Industry

Environmental/Green Technology

Sub Group

Anti-Fouling

Country/Region

USA

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