Elastomers are formed by curing a reaction mixture that includes an polyepoxide-terminated polyether having a linear or branched polyether chain that has a molecular weight of at least 2000, at least two epoxide groups that has an epoxide equivalent weight of at least 400 2) a curing agent containing at least one polythiol compound having at least two thiol groups and an equivalent weight per thiol group of up to 500, and 3) at least one base catalyst.

An epoxy resin oligomer is provided. The epoxy resin oligomer is obtained by the reaction of at least a first reactant and a second reactant, and the molecular weight of the epoxy resin oligomer is between 3000 and 9000, wherein the mole ratio of the first reactant and the second reactant is between 1:0.9 and 0.9:1, and each of the first reactant and the second reactant is a compound having two polymerizable groups.

The present disclosure relates to a modified epoxy resin having the formula (I):

##STR00001## wherein R is R1, R2 or a combination of R1 and R2; R1 and R2 are independently alkyl group having 1 to 32 C atoms, branched alkyl group having 1 to 32 C atoms, Cyclo-aliphatic group, substituted cycloaliphatic group, aromatic group, substituted aromatic group, biaryl or alkyl substituted biaryl group, methyl bridged aromatic group, cycloaliphatic-aromatic group or Ar—Z—Ar group; X and Y are independently O, —C(O)O—, or an amine group. Z is dicyclopentadiene; R3 and R4 are independently either H, alkyl group, branched alkyl group, alkoxy group, substituted biaryl group or methyl bridged aromatic group; R4 and R3 optionally forming a fused aromatic ring or a fused hetero aromatic ring; n is 0 to 1 with n=0>75%; and N is 1-20.

This invention relates to a flame-retardant epoxy resin, to a method of preparing the same, and to a flame-retardant epoxy resin composition including the same, and more specifically to a flame-retardant epoxy resin, which satisfies properties while improving flame retardancy by increasing the phosphorus content, to a method of preparing the same, and to a flame-retardant epoxy resin composition including the same.

An epoxy composition that includes an epoxy-terminated prepolymer, an alkanolamine hardener having at least one hydroxyl group and an organometallic compound, where amine groups of the alkanolamine hardener react with epoxy groups of the epoxy-terminated prepolymer in a stoichiometric ratio to form a cured epoxy composition. The epoxy-terminated prepolymer is formed from a reaction product of an amine terminated polymeric polyol and a molar excess of epoxy groups in an epoxy monomer, relative to a molar amount of amine groups in the amine terminated polymeric polyol.

The present invention is to provide polyether compounds having epoxy hydroxyl urethane group, as the following formula (I), (II) or (III) shows:

##STR00001##

and waterborne epoxy resin composition. Using the hydroxyl urethane as emulsifier, the obtained waterborne epoxy resin composition of the present invention has better stability and freeze-thaw resistance.

A liquid epoxy resin composition is provided. In preferred embodiments, the liquid epoxy resin composition is free of bisphenol A, bisphenol F, and bisphenol S, including epoxides thereof, and is useful in preparing a polyether polymer having utility in coating compositions, including, e.g., coating compositions for use on food or beverage containers.

The present invention relates to a cross-linkable composition comprising an epoxy oligomer comprising at least six hydroxy groups, to a coating obtained by curing the cross-linkable composition and to an optical lens comprising said coating on a surface thereof, in particular on the edge surface thereof. The invention also relates to a method of preparing a coating for an optical lens and to a method of coating a surface of an optical lens, in particular the edge surface of an optical lens.

The present invention provides a resin composition which has excellent handleability and which provides a cured product having excellent toughness and heat resistance. The present invention relates to a thermosetting resin composition including an allyl compound (A) containing at least two or more allyl groups and one or more benzene rings in a molecule, a maleimide compound (B) containing at least two or more maleimide groups in a molecule, a thiol compound (C) containing at least two or more thiol groups in a molecule, and a cyclic compound (D) containing at least two or more hydroxyl groups in a molecule.

A thermoset epoxy resin, its preparing composition and making process are disclosed. In particular, the thermoset epoxy resin is glycidyl ether of diphenolic bis-carbamate and formed by curing a one component epoxy composition and has a general structure as shown in formula (1).