Lactide-based random polyester polyols for use in polyurethane compositions are disclosed. The polyester polyols have an OH value in the range of greater than 400 mg KOH/g up to 1100 mg KOH/g and are the reaction product of at least one polycarboxylic acid, at least one lactide, and one or more polyalcohols. The polyester polyols can be formulated into the B-side of a two part polyurethane composition to obtain a polyurethane having improved hardness and solvent resistance and a low VOC content. The polyurethane composition is particularly suitable for polyurethane coating applications.

A process for preparing coatings or sealed materials using a coating composition or a sealant that contains a first component and a second component. The first component includes a compound A) with at least one five-membered cyclic monothiocarbonate group. The second component includes a compound B) with at least one amino group. The at least one amino group can be a primary or secondary amino group or blocked primary or secondary amino group. Compounds A) or B) may additionally have at least one polymerizable, ethylenically unsaturated group. The coating composition or sealant may further include a compound C) with at least one polymerizable, ethylenically unsaturated group.

A number of sealants are provided that are resistant to degradation by aircraft fluids. In some embodiments, the sealants are resistant to degradation by Jet A fluid and at least one of the three types of hydraulic fluids typically used in aircraft. These embodiments are also typically cure in place from a two-part polyurethane or polyurea mix, with cure to a visibly clear coating. In some embodiments, they may be sprayed on an aircraft surface or applied by hand (brush or injectable). In other of these embodiments, the sealants comprise, at least in part, a cured, soft, tacky polyurethane gel that is resistant to at least one of a synthetic hydrocarbon based or mineral oil based hydraulic fluid.

The present invention relates to a compound of formula (I):

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and also to the process for preparing same, and to the uses thereof. The present invention also relates to the polyurethanes obtained from the compounds of formula (I), and also to the uses of said polyurethanes.

The invention relates to a composition comprising a sulfone-group containing resin obtainable by reaction of a polyamine containing at least one sulfone-group with a polyepoxide and optionally a hardener, as well as adhesives and coating compositions comprising said compositions having gas-barrier properties, methods for bonding substrates using said adhesives and the thus obtained articles as well as the use of the compositions described herein as adhesive or coatings having gas-barrier properties.

Described herein are aqueous binder formulations including organic compounds including acryloyloxy groups and carboxylic acid hydrazides.

A solvent-based two-component polyurethane-type adhesive composition comprises an —OH component and an —NCO component. The —OH component comprises an amorphous prepolymer including two —OH end groups, with a number-average molar mass M.sub.n of 8000 to 12, 000 g and is chosen from: a) a copolyester (A1) obtained by a polycondensation reaction of at least one aliphatic diol (i) with at least one aromatic diacid (ii) and at least one aliphatic diacid (iii); and b) a polyurethane (A2) obtained by a polyaddition reaction between an aliphatic diisocyanate compound and an amorphous copolyester diol with a number-average molecular weight M.sub.n ranging from 4000 to 11 500 g/mol. The —NCO component comprises a compound (B1) including three —NCO end groups, obtained by the reaction of meta-xylylene diisocyanate (m-XDI) with a triol, said compound (B1) being alone or as a mixture with a compound (B2) derived from an aliphatic diisocyanate.

The present invention relates to a curable isocyanate-free formulation for preparing a polyurethane self-blowing foam comprising at least one multifunctional cyclic carbonate having at least two cyclic carbonate groups at the end of the chain (compound A), at least one multifunctional amine (compound B), at least one multifunctional thiol (compound C) and at least one catalyst (compound D), to a process for preparing said foams, to the thus obtained foams and the recycling of said foams.

The present disclosure relates to a duct sealant, a kit for preparing the duct sealant, and a method of sealing a duct. The duct sealant comprises a curable plastic and a plurality of plastic pellets disposed throughout the curable plastic. The duct sealant is able to provide desirable properties such as quick curing, ease of installation, requires only a small thickness, and sufficiently seals the duct from gases and liquids. The duct sealant has a cellular sealant structure when cured, as the plastic pellets introduce weaknesses into the sealant that allows for easy and quick breakage/removal of the duct sealant with no damage to cables such as fiber optic cables being run through the duct.

A process for preparing polyether-siloxane block copolymers by hydrosilylation of alpha,omega-modified hydrosiloxanes with alpha,omega-modified di(meth)allyl polyethers in the presence of a hydrosilylation catalyst, wherein the reaction is performed in a solvent mixture comprising aromatic solvents, polyethers and alkoxylated alcohol, is described.