Degradation type marine anti-fouling material, preparation method and application thereof

The present invention discloses a degradation type marine anti-fouling material, a preparation method and an application thereof. According to the present invention, a polyol with a characteristic of controllable degradation, isocyanate and a chain extender react to form a multi-block copolymer, wherein the multi-block copolymer can be degraded in seawater so as to flush a new surface, such that adhered marine organisms fall down; the multi-block copolymer can be applicable for preparation of a marine anti-fouling coat; the composition and the ratio of the polymers are adjusted to control crystallinity, and hydrophilicity/hydrophobicity of the polyol so as to effectively regulate degradation properties; with introductions of the isocyanate and the chain extender, excellent mechanical property and adhesion of the polyurethane are combined under the premise of assurance of controllable degradation performance; the degradation type marine anti-fouling material of the present invention can be dissolved in conventional xylene or an alcohol solvent, has good surface self-renewal performance and good mechanical properties, and does not contain any anti-fouling agents; and the method of the present invention has characteristics of simple process and low cost, and is suitable for industrial production.