摘要:
The present invention relates to a water vapor-permeable coating composite containing one or more flexible substrates, which are coated on one or both sides with one or more identical or different coating compositions, provided that at least one coating composition contains, as binder, a silica sol-modified aqueous polymer dispersion prepared from unsaturated monomers.
摘要:
The invention relates to polysiloxanes containing carboxyl groups that are useful for imparting water-repellency to substrates, a process for their preparation, a water-repellent system containing such polysiloxanes, and a process for the production of hydrophobic substrates.
摘要:
Graft polymers of unsaturated monomers onto anionically modified polyureas are outstandingly suitable as binders in the coating of any desired substrates, for example leather.
摘要:
The present invention is directed to novel surface active copolymers and the use thereof in the production of polyurethane powders. More particularly, the copolymers comprise have a substantially linear structure and are obtained by copolymerization ofA) a partial reaction product of1) (meth)acrylic acid or a derivative thereof and2) a macromolecular compound substituted by at least two functional groups selected from OH and NH.sub.2, the functional groups not reacted with Al) being irreversibly blocked, withB) a urethane of 1) a long-chain alkyl isocyanate and 2) a hydroxyalkyl (meth)acrylate.
摘要:
The present invention relates to isocyanto-acylurethanes corresponding to Formula I ##STR1## wherein R has a valency of m+n and is a hydrocarbon group,R' is a hydrocarbon group andm and n may be identical or different, and each have a value of 1 or 2.The present invention also relates to a process for preparation of these isocyanato-acylurethanes which comprises reacting isocyanato-carboxylic acid chlorides with carbamic acid esters. Finally, the present invention is directed to the use of these isocyanato-acylurethanes as intermediate products for the production of thermally cross-linkable synthetic resins or synthetic resin precursors and also as intermediate products for the preparation of cross-linking agents for synthetic resins.
摘要:
The invention relates to crystalline, stable radical anion salts of derivatives of 1,4,5,8-naphthalenetetracarboxylic acid of the formula ##STR1## in which p1 k, n, s, x, m, p, B, R and c have the meaning given in the description,to processes for their preparation and to their use as electrically conductive compounds.
摘要:
The invention concerns ionic and/or non-ionic hydrophilic, aqueous polyurethane-polyurea dispersions (PU dispersions) based on polycarbonate polyols and polytetramethylene glycol polyols, a process for their production and their use as coating compositions, in particular for the production of very stable thick foam deposits in a single coat.
摘要:
The invention relates to reaction products prepared from(a) organic polyisocyanates,(b) 0.005 to 0.9 equivalents of a C.sub.6-24 alcohol per equivalent of NCO or latent NCO present in component (a),(c) 0.1 to 0.995 mol of cyanamide per equivalent of NCO or latent NCO present in component (a), and(d) ammonia or a volatile amine as neutralizing agent for the cyanamide groups of component (c),with the proviso that the reaction products are free from polyester and polyether groups and from halogen atoms.
摘要:
Laminated polarizers are described comprising a polarizing core layer and adhesive layers on one or both sides, each of which can accept a transparent outer layer, the polarizer being a polymer product containing polyacetylene, whose matrix is a polymer having polar groups, and as adhesive layers, in addition to conventional adhesives, such as epoxy resins or acrylic polymers, thermoplastic polyurethane-polyureas are used in particular, having a predominantly linear molecular structure with urethane segments and urea segments bonded exclusively aliphatically or cycloaliphatically.
摘要:
Acylated sugars with a glycosidically bonded isothiocyanate group are prepared by reacting acylated sugars with a glycosidically bonded halogen atom with thiocyanates in the presence of a phase transfer catalyst.