摘要:
The present invention relates to a compound of formula (I) or a stereoisomer, enantiomer, racemic, or tautomer thereof, (I) wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , L 1 and Q 1 have the meaning defined in the claims and the description. The present invention also relates to a process for the preparation of the compound of formula (I). The present invention also relates to the use of a compound of formula (I) as an in situ precursor of a triazolinedione reagent for the functionalization of enes, dienes, aryl and heteroaryl systems via the ene reactions, Diels-Alder reactions, and electrophilic aromatic substitution reactions of said reagent. The present invention also relates to the use of a compound of formula (I) in polymers, membranes, adhesives, foams, sealants, molded articles, films, extruded articles, fibers, elastomers, polymer based additives, pharmaceutical and biomedical products, varnishes, paints, coatings, inks, composite material, organic LEDs, organic semiconductors, conducting organic polymers, or 3D printed articles. The present invention also relates to article comprising said compound of formula (I) and to a process for reshaping and/or repairing said article.
摘要:
A storage and shipping stable polyol blend is provided, The polyol blend includes a first and second polyol. The first polyol may be derived from a natural oil, and the second polyol, may be an amine initiated conventional petroleum-based polyol. The mixture of the first and second polyols form a polyol blend having a single continuous phase.
摘要:
This invention relates to a process for preparing microcellular polyurethane polymers by reaction of an organic polyisocyanate composition comprising an isocyanate-terminated poly(oxytetramethylene) glycol prepolymer with an active hydrogen-containing composition which comprises a polyesther polyol and a chain-extending agent, in the presence of a blowing agent comprising water. Resulting polymers display good physical properties including abrasion resistance and durability and are of value in shoe soles applications and automotive applications.
摘要:
The present invention provides an aqueous polyurethane dispersion (PUD) comprising an amorphous polyester having a glass transition temperature (Tg) as determined by differential scanning calorimetry of less than -30C; wherein the aqueous polyurethane dispersion (PUD) has a glass transition temperature (Tg) as determined by differential scanning calorimetry (DSC) of 0C to 20C and a hard block content of greater than 50%. Coatings, adhesives and sealants made from the inventive aqueous polyurethane dispersion (PUD) pass detergent resistance testing according to the American Architectural Manufacturers Association's standard, AAMA 615-13, have a pencil hardness according to ASTM D3363 of at least 3H, and are particularly suited for use on low surface energy substrates such as vinyl surfaces including floors, windows, doors, window frames, door frames, window shutters, railing, gates, pillars, arbors, pergolas, trellises, gazebos, posts, fencing, pipes and fittings, wire and cable insulation, automobile components, credit cards, and siding.
摘要:
The invention relates to compositions and methods for solid freeform fabrication of medical devices, components and applications in which the composition includes a thermoplastic polyurethane which is particularly suited for such processing. The useful thermoplastic polyurethanes are derived from (a) an aromatic diisocyanate component, (b) a polyol component, and (c) a chain extender component where the molar ratio of (c) to (b) is at least 4.25.
摘要:
The invention provides polyurethane and polyisocyanurate foams and methods for the preparation thereof. More particularly, the invention relates to closed-celled, polyurethane and polyisocyanurate foams and methods for their preparation. The foams are characterized by a fine uniform cell structure and little or no foam collapse. The foams are produced with a polyol premix composition which comprises a combination of a hydrohaloolefin blowing agent, a polyol, a silicone surfactant, and a precipitation-resistant metal-based catalyst used alone or in combination with an amine catalyst.
摘要:
A film-forming composition is provided comprising: (i) an amide functional polymer, copolymer or oligomer selected from (a) acrylic polymers, (b) polyesters, (c) polyurethanes, (d) polyethers or (e) mixtures thereof; and (ii) an aminoplast cross-linking agent containing methylol and/or methylol ether groups. The acrylic polymers have a plurality of groups of at least one of the structures of (V) and (II) wherein n is 0 or 1, R1 is hydrogen or methyl, R2 is a divalent linking group having about 1 to 30 carbon atoms when the group is of the first structure, or R2 is alkylene having about 2 to 13 carbon atoms when the group is of structure (II), and R3 is hydrogen or lower alkyl having 1 to 4 carbon atoms. The (b), (c), and (d) polymers each have a plurality of terminal amide groups. The film-forming composition prior to curing has a theoretical hydroxyl value less than about 50 based on total resin solid weight of the film-forming composition, excluding any hydroxyl functionality associated with N-methylol groups. Aftercuring, the film-forming composition exhibits a high level of acid etch resistance. A multi-component composite coating composition is also provided. The coating composition comprises a pigmented film-forming composition serving as a base coat and a clear film-forming composition serving as a transparent coat over the top of the base coat. The transparent clear coat is derived from the curable film-forming composition described above.