Biodegradable polyurethane foam slabstock and method of production

A biodegradable polyurethane foam, comprising:

• a polyol;
• an isocyanate;
• a blowing agent either equal to or no more than 4% of the biodegradable polyurethane foam by weight;
• a catalyst either equal to or no more than 1% of the biodegradable polyurethane foam by weight;
• a surfactant either equal to or no more than 1% of the biodegradable polyurethane foam by weight;
• and
• a hydrophilic biodegradable solid additive either equal to or no greater than 3% of the biodegradable polyurethane foam by weight;
• wherein the hydrophilic biodegradable solid additive includes polyethylene glycol-polycaprolactone copolymers;
• wherein the biodegradable polyurethane foam using the hydrophilic biodegradable solid additive has a same performance characteristic profile as a polyurethane foam of a same composition but made without the hydrophilic biodegradable solid additive;
• wherein the performance characteristic profile of the biodegradable polyurethane foam compared to that of the polyurethane foam made without the hydrophilic biodegradable solid additive includes measurements of density, texture, durability, and support factor;
• wherein the hydrophilic biodegradable solid additive is non-starch based;
• wherein the hydrophilic biodegradable solid additive has a particle size greater than or equal to 200 microns and less than 400 microns;
• wherein the hydrophilic biodegradable solid additive is activated only when the biodegradable polyurethane foam is buried in a landfill;
• and
• wherein the biodegradable polyurethane foam is at least 70% degraded into inert humus, methane and carbon dioxide within the landfill after 900 days.