摘要:
A system is described for producing an in-situ PUR foam, consisting of the components • 50 to 98 percent by weight of one or more inorganic fillers A), • 1 to 48 percent by weight of one or more water-soluble, cationic polymers B) • 0.5 to 48 percent by weight of one or more surfactants C) • 0.01 to 5 percent by weight of one or more cross-linkers D) which are reactive with the polymers B), • 0 to 20 percent by weight of one or more additives E), wherein the weight percentages of components A) to E) relate to the non-aqueous proportions and the total of A) to E) is 100 percent by weight. The inventino further relates to a method for producing an in-situ PUR foam using the components of the system and foaming with a gas or a gas mixture, and to a use for thermally insulating and filling-in cavities and hollow articles.
摘要:
The present invention relates to the synthesis of a beaded and cross-linked, high loading capacity polymer for solid phase synthesis, purification of reaction mixtures, chromatographic separation procedures, and the like. The invention can thus be used for the isolation of molecular entities having an affinity for the polymer beads or a chemical entity attached thereto. The beaded polymer matrix can be formed by cross-linking an optionally substituted poly(aminoalkylene), under inverse suspension or inverse emulsion polymerisation conditions, with a cross-linking unit of functionality ≥2.
摘要:
The present invention provides a composition including a polymer nanoparticle and at least one agricultural active compound incorporated with the nanoparticle, wherein the nanoparticle are less than 100 nm in diameter, and the polymer includes a polyelectrolyte.
摘要:
Process for reducing the content of water-soluble salts of aqueous solutions of polymers containing vinylamine groups by ultrafiltration to achieve a residual salt content of 1 to 10 % by weight based on total solution solids in the polymer solution comprising feeding an aqueous salt-containing solution of vinylamine group containing polymers at a polymer concentration of at least 7 % by weight to an ultrafiltration unit and removing the water-soluble salts with the permeate from the feed solution by adding thereto less than 4 parts by weight of water per one part by weight of the feed solution, and use of the polymer of the aqueous solutions thus purified as basic water-absorbing resin of multicomponent superabsorbent polymers. Preferably vibratory shear membranes in a diafiltration configuration are used.
摘要:
There is provided an anion exchange membrane comprising, as a main element, a block copolymer having a vinyl alcohol polymer block and a cationic-group containing polymer block as components and which is subjected to a crosslinking treatment. An anion exchange membrane is produced by heating a film obtained from a solution of the block copolymer at a temperature of 100 °C or more, crosslinking the film with a dialdehyde compound in water, an alcohol or a mixture of these under an acidic condition and then washing the film with water. Thus, there can be provided an anion exchange membrane in which organic fouling can be prevented and which exhibiting excellent basic properties such as a membrane resistance and an ionic transport number and excellent membrane strength.
摘要:
Verfahren zur Herstellung einer bipolaren Membran durch Befestigung einer Anionenaustauschermembran auf einer Kationenaustauschermembran mit Hilfe eines ionendurchlässigen Haftmittels, wobei man als Haftmittel eine wässrige Lösung eines Polyvinylamins verwendet und die bipolare Membran, die aus den beiden lonenaustauschermembranen und dem filmartigen Haftmittel besteht, einer Elektrodialyse unterwirft.
摘要:
There is provided an anion exchange membrane comprising, as a main element, a block copolymer having a vinyl alcohol polymer block and a cationic-group containing polymer block as components and which is subjected to a crosslinking treatment. An anion exchange membrane is produced by heating a film obtained from a solution of the block copolymer at a temperature of 100 °C or more, crosslinking the film with a dialdehyde compound in water, an alcohol or a mixture of these under an acidic condition and then washing the film with water. Thus, there can be provided an anion exchange membrane in which organic fouling can be prevented and which exhibiting excellent basic properties such as a membrane resistance and an ionic transport number and excellent membrane strength.
摘要:
Process for reducing the content of water-soluble salts of aqueous solutions of polymers containing vinylamine groups by ultrafiltration to achieve a residual salt content of 1 to 10 % by weight based on total solution solids in the polymer solution comprising feeding an aqueous salt-containing solution of vinylamine group containing polymers at a polymer concentration of at least 7 % by weight to an ultrafiltration unit and removing the water-soluble salts with the permeate from the feed solution by adding thereto less than 4 parts by weight of water per one part by weight of the feed solution, and use of the polymer of the aqueous solutions thus purified as basic water-absorbing resin of multicomponent superabsorbent polymers. Preferably vibratory shear membranes in a diafiltration configuration are used.