Disclosed is a novel room-temperature curable bio-based epoxy vitrimer with a simple design of the chemical structure. A hempseed oil-derived glycidyl ester type epoxy (HOEP) was synthesized and then blended with a bisphenol A epoxy (DER331) to manipulate the properties of the resulting vitrimer s. An aliphatic amine hardener, diethylenetriamine (DETA), was selected as hardener to realize the room temperature curing in presence of triethanolamine (TEOA) as the catalyst. Unlike the traditional glycidyl ether epoxy-amine the thermosets which are based on stable C-N and ether linkages, the epoxy vitrimer herein includes ester bonds with HOEP and hydroxyls formed from the reaction of amine and epoxy in its cross-linked network. Dynamic transesterification (DTER) between the ester bonds and hydroxyls take place at elevated temperatures, imparting the vitrimer significant stress relaxation behavior and repairability. This provided a viable method to produce room temperature curable epoxy vitrimer s.

Disclosed is a hydrophobically-modified associative thickener polymer prepared from a reaction mixture comprising a) a poloxamer tri-block copolymer of the formula (I):

##STR00001##

b) at least one active hydrogen-containing compound c) a gem-polyhalide with an alkali hydroxide; or d) a polyglycidyl ether with an alkali hydroxide; e) optionally, a hydrophobe-containing compound; also disclosed are aqueous protective coating compositions; and further disclosed is a process to prepare a hydrophobically-modified associative thickener polymer.

Aqueous polyurethane dispersions and coatings and heat-activatable adhesives made from the dispersions are disclosed. The dispersions include a polyurethane reaction product of a polyester polyol and a polyisocyanate. The polyester polyol comprises recurring units of at least one C.sub.2-C.sub.6 aliphatic diol, at least one aliphatic or cycloaliphatic C.sub.4-C.sub.10 dicarboxylic acid, and an aromatic diacid source, which can be recycled PET. The dispersion is formulated using 1 to 3 moles of an acid-functional diol per mole of polyester polyol. Dispersions for the adhesives are produced at NCO/OH molar ratios within the range of 0.90 to 0.98. The adhesives successfully bond a wide range of plastic and metal materials, often demonstrating substrate failure, even with steel. This contrasts with commercial adhesives such as EVA that exhibit only adhesive failure with the same substrates.

The present invention is directed to non-aqueous, curable film-forming compositions comprising: a) an anhydride functional compound; b) at least one of: (i) a hydroxyl functional compound having at least two hydroxyl functional groups and (ii) a carbodiimide functional compound; and c) hydrolyzable functional groups. After application of the curable film-forming composition to a substrate to form a coated substrate, and upon subjecting the coated substrate to curing conditions, the curable film-forming composition undergoes multiple cure reactions. The present invention is further directed to methods of preparing coated substrates with these compositions.

An amine-functional adduct from the reaction of at least one amine of the formula (I) with at least one novolak epoxy resin having an average functionality in the range from 2.5 to 4. The adduct is liquid at room temperature without thinners and without a large excess of amine. It is suitable as a curing agent for epoxy resin compositions, in which it permits good workability, rapid curing, high hydrophobicity, and a high crosslinking density. It is particularly suitable for coatings, in which it permits nice surfaces, good intercoat adhesion, high thermal shock resistance, and good protection against steel corrosion.

The present invention relates to an epoxy composition comprising a) an epoxy resin; b) a curing agent; and c) a bio-based epoxy compound having a structure I:

##STR00001##

The composition according to the present invention can be used as a structural adhesive, a coating and a primer.

The present invention relates to compount (I) comprising at least one functional group A and at least one functional group B, wherein the functional groups A has structural formula A: wherein R.sub.1 is H, R.sub.2, R.sub.3 and R.sub.4 are independently chosen from H, methyl or ethyl, m is 1-6; and the functional groups B has structural formula B: R.sub.5 is H or methyl, X is O or NH, Z′ is a polyalkoxy group or an omega-alkoxy polycaprolacton group, Y′ is a collection of atoms covalently connected in linear or branched configuration n″ is 0 or 1, and m′ is an integer from 1-6; with the proviso that the summed amount of the number of functional groups A and the number of functional groups B in compound (I) is from 2-13; and the compound has a molecular weight in the range from 800-10000 Dalton.

##STR00001##

A curable composition containing: a compound represented by the following formula (1):

##STR00001##

wherein R.sup.11 and R.sup.12 each independently represent a hydrogen atom or a methyl group, and R.sup.13 represents a divalent group having a polyoxyalkylene chain; and at least one polyalkylene glycol ether selected from the group consisting of a polyalkylene glycol monoether and a polyalkylene glycol diether.

This disclosure generally provides polyfunctional isocyanate compositions and polyurethane compositions made thereof which has improved impact resistance, wherein the polyfunctional isocyanate composition comprising a polyfunctional isocyanate compound which is a derivative of an ether based diisocyanate; wherein the functionality of the polyfunctional isocyanate compound is 3.

Oligomeric substances which contain one or more (meth)acryloyl functional groups as well as two or more amide functional groups are useful as components of compositions which may be cured using actinic irradiation to provide polymeric articles.