Process for recycling a polyurethane material
View Patent ↗A process for recycling a polyurethane material wherein the polyurethane material comprises a moiety that is capable of undergoing decomposition through acidolysis, the process comprising: contacting the polyurethane material with an acid solution and allowing at least a portion of the polyurethane material to decompose into a recovered raw material composition comprising a degradation compound; and introducing an acetoacetylated polyol into the recovered raw material composition and reacting the acetoacetylated polyol with the degradation compound to form a polyol compound.
1 . A process for recycling a polyurethane material wherein the polyurethane material comprises a moiety that is capable of undergoing decomposition through acidolysis, the process comprising:
contacting the polyurethane material with an acid solution and allowing at least a portion of the polyurethane material to decompose into a recovered raw material composition comprising a degradation compound (“Component (i)”), wherein Component (i) is an aldehyde compound, a ketone compound, or combinations thereof; and
introducing an acetoacetylated polyol into the recovered raw material composition and reacting the acetoacetylated polyol and Component (i) to form a polyol compound (“Component (zz)”).
2 . The process according to claim 1 , wherein the recovered raw material composition further comprises: a hydroxy functional terminated urethane compound (“Component (ii)”), a hydroxy containing compound that is different from Component (ii) (“Component (iii)”), an auxiliary compound (“Component (iv)”), or combinations thereof.
3 . The process according to claim 2 , wherein the process further comprises utilizing one or more of Components (i)-(iv) and (zz) as a raw material in the manufacture of another material.
4 . The process according to claim 2 , wherein the process further comprises extracting one or more of Components (i)-(iv) from the recovered raw material composition prior to it being utilized as a raw material in the manufacture of another material.
5 . The process according to claim 1 , wherein the acid solution comprises an acid compound, water, and a polyol compound (“Component (yy)”).
6 . The process according to claim 5 , wherein the acid compound is miscible with Component (yy).
7 . The process according to claim 5 , wherein the recovered raw material composition contains at least a portion of the acid solution that contacted the polyurethane material, and the process further comprises extracting water from the raw material composition.
8 . The process according to claim 1 , wherein the process further comprises utilizing one or more of Components (i) and (zz) as a raw material in the manufacture of another material.
9 . The process according to claim 1 , wherein the process further comprises extracting Component (i) from the recovered raw material composition prior to it being utilized as a raw material in the manufacture of another material.
10 . The process according to claim 1 , wherein the process comprises submerging at least a portion of the polyurethane material into the acid solution.
11 . The process according to claim 1 , where the entire polyurethane material is submerged into the acid solution.
12 . The process according to claim 1 , wherein the process further comprises agitating the polyurethane material during acidolysis to promote the decomposition of the polyurethane material.
13 . The process according to claim 1 , wherein the process comprises applying heat to the polyurethane material during acidolysis to promote decomposition of the polyurethane material.
14 . The process according to claim 1 , wherein the process comprises conducting the acidolysis under vacuum to promote the decomposition of the polyurethane material.
15 . The process according to claim 1 , wherein the polyurethane material comprises acetal moieties in its polymeric backbone.
16 . The process according to claim 1 , wherein the polyurethane material is the reaction product of an isocyanate compound and an isocyanate reactive compound wherein the isocyanate reactive compound comprises a polyol compound comprising an acetal moiety, an orthoester moiety, or combinations thereof.
17 . The process according to claim 1 , wherein the polyurethane material is the reaction product of an isocyanate compound and an isocyanate reactive compound wherein the isocyanate reactive compound is the reaction product of: (a) a polyol compound, and (b) a divinyl ether compound, wherein component (a) is in molar excess to component (b).
18 . The process according to claim 1 , wherein the acetoacetylated polyol is the reaction product of an acetoacetyl functional monomer with a polyether polyol compound.
19 . The process according to claim 1 , where the acetoacetylated polyol comprises up to 40% acetoacetyl functional groups based on available hydroxyl groups in the acetoacetylated polyol.