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There are described a polymeric composition comprising inorganic and optionally organic components, useful as a binder for pre-impregnated fiber-reinforced composite materials, the pre-impregnated fiber-reinforced composite materials obtained using the polymeric composition, and the products obtained by forming and completely setting the aforesaid pre-impregnated fiber-reinforced composite materials. The products of the invention are lightweight, fire-resistant, and stable at high temperatures, with high resistance to yellowing by heat and/or ultraviolet radiation, and are suitable for the production of parts such as aircraft interiors, heat and/or fire barriers, or structural parts intended to operate at high temperatures.

The present disclosure concerns an industrial manufacturing process (P) of mixtures of foamed polyurethane granules (G) from the recycling of aluminium slats (D) insulated with foamed polyurethane, with steps of: supply of the slats and scraps of slats (D); storage of said materials to be recycled (D); automatic feeding of cutting machines (MD); automatic feeding of pre-grinding machines (PM); collection of the polyurethane component (PU); recovery of the aluminium (AL); recovery of the foamed polyurethane (PU) powders; agglomeration of the collected powders; lastly, packaging of the mixture of polyurethane (PU) granules thus obtained, without the contribution of chemical substances and without using process water. The mixture of rigid foamed polyurethane (PU) granules thus obtained via the present process (P) is called "GRISOPOL"® (G).

A functionalized tamarind seed polysaccharide, and a process for its preparation. In particular, said functionalized tamarind seed polysaccharide is a TSP having a selected functionalization degree and molecular weight, showing improved mucoadhesive properties, as well as stability and compatibility with pharmaceutical ingredients. Therefore, the invention also relates to a pharmaceutical composition, as well as a biomaterial, comprising said f-TSP.

The present invention relates to a vitrimer and to a method for preparing the same. The present invention also relates to an article made of the aforementioned vitrimer and to a method for reprocessing said vitrimer. In particular, the Applicant has surprisingly found that permanently and covalently attaching an amine catalyst to the polymer network of a vitrimer, in particular a PTU vitrimer, allows to form internal catalytic moieties that enable indefinite reprocessability, simultaneously reducing the reaction rate of the initial thiol-isocyanate reaction.

The present patent application relates to an antioxidant and anti-ravelling association for draining bituminous conglomerates comprising or consisting of - diphenylmethane diisocyanate (MDI) in the form of isomers, oligomers, and/or polymers, - an organosilane of formula (I) below (formula I) wherein R1 is selected from: methyl, ethyl, methoxy, ethoxy, R2 is selected from: methyl or ethyl, R3 is selected from the group consisting of: -CH2-, -OCH2-, -CH2CH2-, -OCH2CH2-, - CH2CH2CH2-, -OCH2CH2CH2-, -NHCH2CH2-, -NHCH2CH2CH2-, R4 is selected from the group consisting of: NH2-, NH2CH2-, NH2CH2CH2-, SH-, characterized in that the weight ratio between diphenylmethane diisocyanate (MDI) and organosilane is comprised between 9:1 and 19:1.

The synthesis of polyether polyols suitable for the preparation of polyurethane is carried out by polymerisation of polyfunctional alcohols, using a mixture of acids as a catalyst for the polycondensation reaction, avoiding partial degradation (oxidation) of the raw materials and the consequent increase in the colour of the product. The mixture of monomers, consisting of one or more polyfunctional alcohols, is reacted under polycondensation conditions using a catalyst mixture comprising at least one oxidising acid and at least one reducing acid. The process can be used to synthesise polyether polyols with reduced colour, generally lower than 50 Hz and with a high degree of purity, in a short time and without the need for additional treatments for colour reduction.

Plant (10) for the controlled introduction of a blowing agent into a reagent of a polyurethane mixture; said plant comprising: - a tank (12) for storing said reagent, said tank (12) being provided with an outlet duct (14); - a recirculation pump (16), provided along said outlet duct (14) and having a delivery duct (18) connected to a first inlet (22) of an ejector (20); a second inlet (24) of said ejector (20) being connected to a circuit (26) supplying the blowing agent; - at least one mixer (30) connected to an outlet duct (28) of said ejector (20); - a recirculation duct (32) having an inlet (34), connected to an outlet (36) of the mixer (30), and an outlet (38), connected to said storage tank (12); - a supply device (40), situated upstream of the second inlet (24) of the ejector (20) and connected to the circuit (26) supplying the blowing agent; - control means (50) for said supply device (40) for varying the amount of blowing agent introduced into the ejector (20) via the second inlet (24).

本发明公开了一种纳米级镁‑没食子酸金属有机框架材料及其制备方法，属于金属有机框架材料技术领域。本发明旨在解决现有镁‑没食子酸金属有机框架材料粒径较大、粒径分布不均及制备重复性不足的问题。本发明的制备方法包括以下步骤：S1：制备没食子酸溶液或没食子酸有机相溶液；S2：得到镁‑没食子酸混合溶液；S3：加入聚乙烯吡咯烷酮，并调节体系pH至7.5‑8.0；S4：进行热处理；S5：进行快速冷却；S6：收集、洗涤和干燥产物。本发明通过控制混合溶剂体系、镁盐与没食子酸的接触方式、pH范围、聚乙烯吡咯烷酮用量以及热处理和冷却条件，实现了粒径较小、分布较均一且制备重复性较好的纳米级镁‑没食子酸金属有机框架材料的制备。

Methods of producing thermoplastic lignocellulose are described herein. The methods include mixing a feed stream and a recycle stream to form a mixed feed stream, the feed stream comprising unmodified lignocellulose, the recycle stream comprising modified lignocellulose that has passed through an extruder; providing the mixed feed stream to the extruder at a feed port of the extruder; providing a liquid modifier to the extruder at a second port of the extruder, the second port being downstream from the feed port so that the liquid modifier mixes with the mixed feed stream within the extruder to initiate side-chain modification of the unmodified lignocellulose within the mixed feed stream, the liquid modifier comprising a cationic surfactant/sulfuric acid additive and an esterification agent; and producing a product stream by the extruder at an outlet of the extruder, the product stream comprising the thermoplastic lignocellulose as extrudate.