摘要:
Process for the preparation of aerogels by subcritical drying of inorganic and organic hydrogels and lyogels to give aerogels, dielectric drying methods being used.
摘要:
Process for the preparation of aerogels by subcritical drying of inorganic and organic hydrogels and lyogels to give aerogels, dielectric drying methods being used.
摘要:
Water-dilutable etherified melamine-formaldehyde resins obtained by reacting melamine, formaldehyde, a compound having anionic groups and an etherification alcohol in a mixing ratio of melamine:formaldehyde:compound having anionic group:etherification alcohol of 1:(1.7 to 7.0):(0.01 to 0.4):(10 to 30) in the reaction mixture, are prepared in a multistage process and are used for preparing impregnates, especially glass fiber fleece and in paper coating.
摘要:
An aqueous amino resin blend comprises aliphatic linear, branched or cyclic amines A containing at least one primary, secondary or tertiary amino group, at least one hydroxyl group and 2 to 20 carbon atoms, and amino resins B, and is used as an impregnating resin in the production of finished foils and edgings.
摘要:
An aqueous resin solution S that comprises an alkali or earth alkali, preferably lithium, sulphamate, hydrogen sulphite, or sulphite, at least one aminoplast resin A, and a curing agent C for the latter, wherein the sulphamate, hydrogen sulphite, or sulphite is present in at least one form of admixed to, and cocondensed within, the at least one aminoplast resin, a method of use thereof to reduce the surface resistance of laminates comprising impregnating at least one layer which is laminated to the surface of the board facing the use side of the said laminates, and laminates obtained by this process
摘要:
Aqueous amino resin compositions comprising amino resins A, formaldehyde-binding additives (auxiliaries) B, which may include hydroxyl-containing polyurethanes B13, acrylic resins C, if desired, in the form of aqueous dispersions, and water, and their use as impregnating compositions for paper for the purpose of producing finished foils and edgings.
摘要:
The present invention relates to a composite material that contains 5 to 97%-vol aerogel particles and at least one adhesive and that is characterised in that the diameter of the aerogel particles is smaller than 0.5 mm, a process for manufacturing this, and the use thereof.
摘要:
An aqueous epoxy resin system ABC comprising an aqueously dispersed epoxy resin A having, on the average, at least one epoxy group per molecule, a water-soluble or water-dispersible curing agent B which comprises the reaction product of an amine B1 having at least one primary and at least one secondary amino group, and an adduct B2 of a polyalkylene ether polyol B21 and an opexide component B22, and aminoplast compound C having a mass fraction of at least 0.1% of sulphonate or sulphonic acid groups, a coating composition ABCD for thick layer applications comprising the aqueous epoxy resin system ABC and at least one particulate filler D selected from the group consisting of talc, mica, quartz, titanium dioxide, aluminium dioxide, calcium carbonate, and dolomite, and a process for coating mineral or concrete based substrates or floors with such coating compositions.
摘要:
N-Alkoxymethylactams are obtained by reacting lactams with formaldehyde and hydroxyl-containing compounds selected from diol monoethers. The substituted lactams are useful as an additive to melamne impregnating resings.