PROCESS FOR PRODUCING POLYMER FOAMS
    2.
    发明申请
    PROCESS FOR PRODUCING POLYMER FOAMS 审中-公开
    生产聚合物助剂的方法

    公开(公告)号:WO2014102708A2

    公开(公告)日:2014-07-03

    申请号:PCT/IB2013/061278

    申请日:2013-12-23

    IPC分类号: C08J9/00 C08J9/26 A61L27/44

    摘要: Process for the production of a polymer foam with use of hydrogel pearls as porosity generating template, comprising the steps of: - providing a matrix of polymer or prepolymer in viscous state including, as a dispersed phase, hydrogel pearls, where said pearls are dispersed in said matrix so as to generate intercommunicating cells, - causing the solidification of the matrix of polymer or prepolymer to obtain said polymer foam including said hydrogel pearls, characterised in that it comprises the operation of subjecting the thus obtained foam to conditions which cause the dehydration of said hydrogel pearls so as to obtain a reduction of volume of said pearls and - removing the dehydrated pearls by immersion in water of the polymer foam or by exposure of the foam to a flow of pressurized gas or water.

    摘要翻译: 使用水凝胶珍珠作为孔隙产生模板生产聚合物泡沫的方法,包括以下步骤: - 提供粘性状态的聚合物或预聚物基质,包括分散相,其中所述珍珠分散在 所述基质以产生相互连通的细胞, - 使聚合物或预聚物基质固化得到包括所述水凝胶珍珠的所述聚合物泡沫体,其特征在于,其包括将由此获得的泡沫体经受使引起脱水的条件的操作 所述水凝胶珍珠,以便减少所述珍珠的体积,以及 - 通过浸入聚合物泡沫的水中或通过将泡沫暴露于加压气体或水的流中去除脱水珍珠。

    INJECTABLE GEL PRODUCT
    9.
    发明申请

    公开(公告)号:WO2019121688A1

    公开(公告)日:2019-06-27

    申请号:PCT/EP2018/085504

    申请日:2018-12-18

    摘要: The present invention provides a method of producing an injectable gel product, comprising the steps of a) cross-linking a first glycosaminoglycan (GAG) with a first crosslinking agent to produce a gel, wherein the charging ratio of crosslinking agent to disaccharide unit is below 0.15; b) preparing particles of the gel from step a); c) mixing the glycosaminoglycan (GAG) gel particles of step b) with a second glycosaminoglycan (GAG) to provide a mixture; d) cross-linking the mixture of step c) with a second crosslinking agent to obtain cross-linking between the glycosaminoglycans (GAGs) of the second, outer phase, thereby providing a gel having a first, inner phase of the cross-linked glycosaminoglycan (GAG) gel particles, embedded in a gel of the second, outer phase comprising the second glycosaminoglycan (GAG), and e) preparing injectable particles of the gel from step d), each such particle containing a plurality of the cross-linked GAG gel particles of the first, inner phase. The present invention further provides an injectable gel product, an aqueous composition, and a pre-filled syringe.

    CHITIN NANOWHISKER COMPOSITES AND METHODS
    10.
    发明申请
    CHITIN NANOWHISKER COMPOSITES AND METHODS 审中-公开
    CHINTIN NANOWHISKER复合材料和方法

    公开(公告)号:WO2015000055A1

    公开(公告)日:2015-01-08

    申请号:PCT/CA2014/000532

    申请日:2014-07-03

    发明人: GUAN, Qi

    摘要: A composite includes particles of thermoplastic polymer coated with a chitin nanowhisker gel and melt-blended. The thermoplastic polymer may be polystyrene, polyethylene, acrylonitrile butadiene styrene, polycarbonate, or another thermoplastic polymer. A method of processing chitin includes forming a non-colloidal mixture substantially of chitin and hydrochloric acid to subject the chitin to hydrolysis; upon the mixture becoming substantially colloidal, controlling conditions of the mixture to slow the hydrolysis; and producing a gel consisting substantially of non-agglomerated chitin nanowhiskers and water by subjecting the mixture to filtration and a process for reducing the amount of agglomerated crystalline chitin in the mixture. A method of forming a composite of chitin nanowhiskers dispersed in a thermoplastic polymer matrix includes coating thermoplastic polymer particles with a chitin nanowhisker gel; and subjecting the coated particles to melt-blending thereby to form the composite.

    摘要翻译: 复合材料包括用几丁质纳米隐形凝胶涂覆并熔融共混的热塑性聚合物颗粒。 热塑性聚合物可以是聚苯乙烯,聚乙烯,丙烯腈丁二烯苯乙烯,聚碳酸酯或另一种热塑性聚合物。 加工甲壳质的方法包括形成基本上几丁质和盐酸的非胶体混合物以使壳多糖进行水解; 当混合物变得基本上胶体时,控制混合物的条件以减缓水解; 并且通过对混合物进行过滤和用于减少混合物中附聚的结晶几丁质的量的方法制备基本上由非聚集的几丁质纳米晶须和水组成的凝胶。 形成分散在热塑性聚合物基质中的几丁质纳米晶须的复合物的方法包括用甲壳质纳米晶须凝胶涂覆热塑性聚合物颗粒; 并对涂覆的颗粒进行熔融共混以形成复合材料。