摘要:
Polymer foams comprising macropores, the macropores having average cross sections of above 500 nm, are obtainable by reacting one or more epoxy resins with one or more amphiphilic epoxy resin hardeners in water in a phase inversion polymerization, where, during the phase inversion polymerization, but after phase inversion has taken place, a volume increase of the internal voids which form initially, and which are present predominantly as micropores having average cross sections of below 500 nm, is induced such that the fraction of the macropores—relative to the entirety of micropores and macropores present in the polymer foam—at the end of the phase inversion polymerization is above 50% by volume. Polymer foams of the present invention are suitable for use as acoustic insulation materials in means of transport and in industrial and plant construction.
摘要:
Nanoporous polymer foams can be obtained by reacting one or more epoxy resins with one or more amphiphilic epoxy resin hardeners in water in a phase inversion polymerization process, with the stipulation that the binder fraction of the polymer foams is within the range of 15 to 39.9 wt %. Said nanoporous polymer foams are suitable as heat-insulating materials.
摘要:
The invention relates to sulfosuccinates of the general formula (1), where M is hydrogen or a cation and the groups R4 and R5—independently of each other—are hydrogen or a cation or an alkyl group, wherein no more than one of the groups R4 or R5 is hydrogen or a cation, wherein said sulfosuccinates contain at least one alcohol building block that is assigned to the mono-alcohols with 8 to 36 carbon atoms in total, on the condition that said mono-alcohols are Guerbet alcohols (GA) containing at least two branches per molecule. Said sulfosuccinates are suitable as surfactants having improved dynamic surface tension.
摘要:
Disclosed is a process for the preparation of emulsifiers E1 which are obtained by (a) reacting a polyol with propylene oxide or a mixture of ethylene oxide and propylene oxide, to give an intermediate Z1, (b) reacting the intermediate Z1 with epichlorohydrin, forming an intermediate Z2, (c) reacting the intermediate Z2 with an adduct of ethylene oxide or a mixture of ethylene oxide and propylene oxide, with a C1-C22 monoalcohol, provided that on average at least one epoxide function of the intermediate Z2 is reacted and on average at least one epoxide function originating from the intermediate Z2 is retained. Compounds E1 are suitable as emulsifiers for preparing aqueous emulsions or dispersions of epoxy resins.
摘要:
Detergent portions containing at least one detersive formulation wholly or partly contained in a dimensionally stable hollow body having an enclosure that wholly or partly surrounds the detersive formulation, the enclosure being formed of an uncompressed material that can disintegrate under laundering, cleaning, or washing conditions and that gives the hollow body dimensional stability, and optionally, the dimensionally stable hollow body having one or more means forming one or more compartments therein.
摘要:
The invention relates to hardeners for water-based epoxy resin systems providing a longer resin pot life, incorporating particular compounds (F) and being obtainable by (i) reacting a mixture of (A) at least one epoxidized polyalkylene oxide (A), (B) at least one epoxidized aromatic hydroxy compound (B); (C) at least one aromatic hydroxy compound (C); and (D) optionally, at least one di- or tri-glycidyl ether compound (D), to form a first intermediate product (Z1) having an epoxy value of less than 10%; (ii) reacting the intermediate product (Z1) with a polyamine (E) to form a second intermediate product (Z2); and (iii) reacting the intermediate product (Z2) with a compound (F) selected from (a) monofunctional epoxy compounds, and (b) glycidyl ethers of aliphatic and aromatic hydrocarbons. The resin mixtures have pot lives in excess of one hour and, after curing, provide clear floor coatings with less than 3% shrinkage.
摘要:
The invention is a method for improving the flow of particulate lacquer powders when the lacquer powders are coated on a substrate and the substrate heated to fuse the lacquer particles to provide a finished lacquer surface on the substrate. The flow control agent is an oxazine, oxazoline, oligoxazine or oligoxazoline and salts of the compounds with protonic acids. The flow control agents when included in power lacquer formulations improve the flow of the lacquer when the powder lacquer coated substrate is heated to fuse the coating.
摘要:
A method of thermally insulating a transport means or an industrial or plant construction comprises obtaining a nanoporous foam (NP1) by reacting epoxy resin(s) (E) with amphiphilic epoxy resin hardener(s) (H) in water by a phase inversion polymerization wherein the binder content during polymerization is from 15% to 39.9% by weight, and installing the nanoporous polymer foam as a thermal insulation material in transport means or in an industrial or plant construction.
摘要:
The invention relates to aqueous radiation-hardenable epoxy acrylate dispersions comprising (a) an epoxy acrylate resin (P*) with at least two acrylate groups per molecule, wherein at 25 degrees Celsius, said epoxy acrylate resin is not self-disperging in water; and (b) a dispergator (D*) with at least one acrylate group per molecule, wherein said dispersions can be produced by converting, in a first step (i), in the presence of a catalyst if need be, one or several compounds (A) selected from the group of non-ionic compounds having a HLB value of less than 12, and containing at least two oxirane groups per molecule, with one or several compounds (B) selected from the group of non-ionic compounds having a HLB value in the range from 12 to 20, and which contain at least one h-acid group (ZH) per molecule. The compounds (A) and (B) are employed at an equivalence ratio EpO (A):ZH (B) in the range from 1.3:1 to 400:1, and in a second step (ii), the reactive mixture thus obtained is converted, in the presence of a catalyst if need be, with one or several non-ionic compounds having a HLB value of less than 12, and containing at least two oxirane groups per molecule (compounds A), and with one or several compounds (C) selected from the group of non-ionic compounds having a HLB value of less than 12, and which contain at least two H-acid groups. The compounds (A) and (C) are employed at an equivalence ratio EpO (A):ZH (C) in the range from 1.1:1 to 20:1. In a third step (iii), the reactive mixture thus obtained is converted, in the presence of a catalyst if need be, with acrylic acid by ring opening of all epoxy groups. In a fourth step (iv), the reactive mixture thus obtained is disperged in water.
摘要:
By reaction of one or more epoxy resins with an amphiphilic epoxy resin hardener in water in a phase inversion polymerization, nanoporous polymer foams are obtained. These foams are suitable as thermal insulation materials.