Flexible polyurethane foams

Embodiments of the invention provide for a method of preparing a polyurethane foam, including reacting least one initiator comprising at least two hydroxyl groups with at least one 12-hydroxystearic acid to form at least one polyester polyol, reacting the at least one polyester polyol with at least one alkoxylating agent in the presence of a DMC catalyst to form at least one polyether/polyester polyol, and reacting the at least one polyether/polyester polyol with at least one isocyanate

Polyuretanes, polyurethaneureas and polyureas and use thereof

The present invention is to a chain extended polyurethane, polyurethaneurea and/or polyurea segmented copolymer wherein the polyurethane, polyurethaneurea or polyurea segment contain a chain extender having an amide segment, an ester segment or a combination of amide and ester segments

Thermotropic polymers based on 2,5-furandicarboxylic acid

Er is geen samenvatting beschikbaar voor NL1040533

Efficient and environmental-friendly dehydration of fructose to 5-hydroxymethyl-2-furfural in water under high pressure of CO\u3csub\u3e2\u3c/sub\u3e

\u3cp\u3eTo develop reaction systems of chemical conversion of biomass, fructose was heated in an aqueous medium under pressurized CO\u3csub\u3e2\u3c/sub\u3e, which caused in situ generation of carbonic acid. It gave 5-hydroxymethyl-2-furfural (HMF) as a dehydration product in good yields. The maximum yield of HMF was 92% in the reaction at 90 °C under 7.0 MPa of CO\u3csub\u3e2\u3c/sub\u3efor 168 h. The reaction proceeded in the absence of any other reagents such as non-volatile acids, organic solvents, inorganic, and organic salts. It means green, environmental-friendly, and efficient process was achieved for production of HMF.\u3c/p\u3

Hydroxyphenyl functionalized poly(ester amide)

The present invention relates to a hydroxyphenyl functionalized poly(ester amide), in particular a L-DOPA-based poly(ester amide), and to its use as an adhesive

Linear and branched polyester resins based on dimethyl-2,5-furandicarboxylate for coating applications

In this study, novel bio-based hydroxyl-end-capped (co)polyesters from dimethyl-2,5-furandicarboxylate (DMF), 2,3-butanediol, and a variety of comonomers viz. glycerol, pentaerythritol or trimethylolpropane are prepared using a solvent-free, bulk polycondensation technique. Extensive molecular and thermal characterization was performed to elucidate the properties of these materials. The materials showed suitable properties for solvent-borne coating applications in terms of their molecular weight, functionality and thermal characteristics, and coatings were prepared using the isocyanurate of hexamethylene diisocyanate as a cross-linker. The resulting coatings, having thicknesses between 30 and 55 µm, were hard but rather brittle. All the coatings have good solvent resistance, pointing to sufficient network formation. It is clear that the presented DMF-based polyesters show promise as bio-based coating resins

Bio-based, amorphous polyamides with tunable thermal properties

The aim of this work is to synthesize amorphous polyamides from renewable monomers derived from vegetable oils and sugars. By making use of the odd–even effect to hamper intermolecular hydrogen bonding, combined with either the incorporation of dimerized fatty acid monomers or isoidide diamine (IIDA) produced from fructose, the crystallization of the polyamides was suppressed considerably. Polyamides based on the dimerized fatty acid showed Tg values below 10 °C. The introduction of the isoidide-based diamine enhanced the rigidity of the polymer backbone, which enabled the synthesis of amorphous polyamides with Tg values up to 100 °C. For both series incomplete reaction has been observed as both end groups, i.e. amine and carboxylic acid, were detected in 1H NMR. This results in Mn values from 1H NMR for the fatty acid-based series in the range of 4700–21,000 g mol-1. The Mn values measured by SEC for the IIDA-based were in the range of 3000–10,700 g mol-1. The broad range of Tg values found for these materials in combination with their relatively low molecular weights and the corresponding large amount of reactive end-groups make them suitable for application in coatings, composites, or soft-touch surfaces

Adhesion promoter system, and method of producing the same

The instant invention is an adhesion promoter system, and method of producing the same. The adhesion promoter system comprises the admixing product of: (a) at least 60 percent by weight of a first functionalized polyolefin, based on the total weight of the solid content; (b) less than 40 percent by weight of a second functionalized polyolefin, based on the total weight of the solid content, wherein said second functionalized polyolefin comprise homopolymers of propylene or copolymers of propylene with hexene, octene and/or other like alpha-olefins, the homopolymers or copolymers having a single unsaturation, a terminal succinic anhydride moiety, and additional succinic anhydride substitutions on the polypropylene backbone, where the succinic anhydride substitution ranges from about 5 to about 45 weight percent of second functionalized polyolefin; (c) in the presence of one or more solvents