Abstract: The present invention relates to methods for recycling reinforced composites. The reinforced composite comprises a reinforcement material in a cross-linked polymer matrix, wherein the cross-linked polymer comprises a cross-linking group derived from a curing agent represented by formula I, wherein R1 is hydrogen, alkyl, cylcoalkyl, heterocycloalkyl, alkenyl, cycloalkenyl, aryl, heteroaryl, alkoxy alkyl or alkynyl; A is alkyl, alkenyl, alkenene, alkylene-hetero-alkylene, alkylene-heterocyclo-alkylene, alkylene, alkylene-oxy-alkylene, 1,4-alkyl substituted piperazine, carbonyl, thiocarbonyl; B is alkyl, alkenyl, alkenene, alkylene-hetero-alkylene, alkylene-heterocyclo-alkylene, alkylene, alkylene-oxy-alkylene, 1,4-alkyl substituted piperazine, carbonyl, thiocarbonyl; R2 is hydrogen, alkyl, aminoalkyl, alkyl-amino-alkyl, cylcoalkyl, heterocycloalkyl, alkenyl, aryl, or heteroaryl; and R3 is hydrogen, alkyl, aminoalkyl, alkyl-amino-alkyl, cylcoalkyl, heterocycloalkyl, alkenyl, aryl, or heteroaryl.

Abstract: The present invention provides recyclable copper clad laminates (CCLs) each including copper foil and a recyclable/degradable fiber composition, and printed circuit boards that are made of or include the CCLs of this invention. Also provided are method for recycling these CCLs and printed circuit boards.

Abstract: This invention provides, among others, curing agents of Formula II, methods for preparing these curing agents, prepreg materials, degradable cross-linked polymers and reinforced composites made from these curing agents and epoxy resins, and methods for degrading and/or recycling the degradable polymers and reinforced composites.

Abstract: The present invention provides, among others, compounds of Formula (I) or a salt thereof, methods for making these compounds, degradable polymers and reinforced composites made therefrom, and methods for degrading and/or recycling the degradable polymers and reinforced composites.

Abstract: Among others, the present invention provides isocyanate resin compositions which include an isocyanate compound containing two or more isocyanate functional groups; a chain extender comprising a degradable diamine and optionally a dihydric alcohol, a polyether diol, a polyester diol, a diamine, a dimercaptan, or a bisphenol; and a cross-linker comprising a degradable polyamine and optionally a trifunctional, tetrafunctional or polyfunctional polyhydric alcohol, polyether polyol, polyester polyol, polyamine, polymercaptan, or polyphenol.

Abstract: The present invention relates to a reinforced composite and method for recycling the same. The reinforced composite comprises a reinforcement material in a cross-linked polymer matrix, wherein the cross-linked polymer comprises a cross-linking group derived from a curing agent represented by formula (I), Wherein R1 is hydrogen, alkyl, cycloalkyl, heterocycloalkyl, alkenyl, cycloalkenyl, aryl, heteroaryl, alkoxy alkyl or alkynyl; A is alkyl, alkenyl, alkenene, alkylene-hetero-alkylene, alkylene-heterocyclo-alkylene, alkylene, alkylene-oxy-alkylene, 1,4-alkyl substituted piperazine, carbonyl, thiocarbonyl; B is alkyl, alkenyl, alkenene, alkylene-hetero-alkylene, alkylene-heterocyclo-alkylene, alkylene, alkylene-oxy-alkylene, 1,4-alkyl substituted piperazine, carbonyl, thiocarbonyl; R2 is hydrogen, alkyl, aminoalkyl, alkyl-amino-alkyl, cycloalkyl, heterocycloalkyl, alkenyl, aryl, or heteroaryl; and R3 is hydrogen, alkyl, aminoalkyl, alkyl-amino-alkyl, cycloalkyl, heterocycloalkyl, alkenyl, aryl, or heteroaryl.