Polyols and polyurethanes, polyurethaneforms using the same

A method of preparing polyol by recycling a polymer waste, the method comprising;

• (a) depolymerizing following trans-esterification the mixed waste of polyester and polyamide with the polymeric fatty acid monopolyhydroxyl alcoholide;
• (b) polycondensing the depolymerized products from step (a) with polybasic acid, polyhydricalcohol to obtain polyester-amide oligomer;
• (c) reacting the oligomer composition from step (b) with the amines to obtain the amine adduct polyol composition having function of surfactant.

A method of preparing polyester polyol is synthesized by reacting pure monomer, the method comprising;

• (a) polycondensing a polymeric fatty acid monopolyhydroxy alcoholide with polybasic acid, polyhydric alcohol in the presence of ester reaction catalyst to obtain polyester oligomer composition;
• (b) reacting the oligomer composition from step (a) with the amines to obtain amine adduct polyol having function of surfactant

A method of preparing polyol by recycling polymer waste, comprising;

• (a) where in the depolymerizing the waste of polyurethane elastomer polyurethane forms with depolymeric agent;
• (b) polycondensing the depolymerized product from step (a) with the polybasic acid;
• (c) processing and controlling the product composition including excess amines from step (b) with carboxy acid

A method of preparing polyol by recycling polymer waste, comprising;

• (a) depolymerizing the polyurethanes artificial leather waste that is made up on waste PET, polyamide mixed spinning fiber and non-woven fabric with the polyurethane coating with depolymeric agent;
• (b) polycondensing the depolymerized product from step (a) with the polybasic acid, polyhydricalcohol to obtain depolymerized oligomer composition;
• (c) processing and controlling the product composition containing excess amine from step (b) with the carboxy acid

where in the polyester-amine adduct polyol having an acid value of 0.5˜2 □KOH/g, hydroxyl value of 100˜500 □KOH/g, and weight average molecular weight of 1,000˜50,000 obtained by the method according to the present invention is used as preparing of rigid polyurethane forms by reacting isocyanate with polyol blowing agent, reaction catalyst, surfactant, and additive agent and polyester-amine adduct polyol is used in an amount of 1˜95% by weight based on the weight of the total polyol to obtain rigid polyurethane forms.

Where in the polyols are mixed polyols that have 5˜70% by weight of polymeric fatty acid modified polyester-amide polyol 5˜60 weight % of PTMEG is reacted with 5˜70% by weight of isocyanate to obtain solvent free polyurethane coating material.

Where in the polyols are mixed polyols that have 5˜70% by weight of polymeric fatty acid modified polyether polyol 5˜60 weight % of poly-propylene glycol is reacted with 5˜70% by weight of isocyanate to obtain solvent free coating material for wood and molding article.

Where in the polyols are mixed polyols that have 5˜70% by weight of polymeric fatty acid modified polyester-amide polyol 5˜60 weight % of poly-propylene glycol 5˜70 weight % of wooden sawdust is reacted with of isocyanate to obtain artificial wood.