摘要:
An aqueous dispersion of capsules comprising a resin having at least one repeating unit of formula I, II and/or III and which is obtainable by contacting in a liquid comprising water, a compound A comprising at least 2 functional groups selected from the group of functional groups -X-C(=O)-CHR1-C(=O)-R2, -X-C(=O)-C≡C-R2; or -X-C(=O)-CR1=CR2-NR11 R12, with a compound B comprising at least two -NH 2 , -NH 3 + or -N=C=O, wherein X, R1, R2, R3, R11 and R12 have the same meaning as that defined in the claims. The invention also includes a method of producing the aqueous dispersion and further relates to an aqueous ink jet ink comprising the resin capsules.
摘要:
This invention relates to aminoplast crosslinker resins compositions based on at least partially alkylated reaction products A of melamine, formaldehyde and an alkanol with the following parameters: the ratio of the amount of substance n(CH2O) of combined formaldehyde to the amount of substance n(Mel) of melamine is in the range of from 5.6 mol/mol to 6.2 mol/mol, the ratio of the amount of substance n(RO) of alkyl ether groups in the crosslinker resin to the amount of substance n(Mel) of melamine is in the range of from 5.0 mol/mol to 5.6 mol/mol, the mass fraction of monomer in the resin, calculated as the ratio of the mass of monomer m(1) to the mass m(A) of the reaction products A is between 35 % and 55 %, to a process for their preparation, and to a method of use thereof as crosslinker in combination with hydroxy- functional polymers for coating of heat-sensitive substrates.
摘要:
The invention described herein pertains to formaldehyde free, thermosetting liquid high solids binder compositions having rapid cure times on thermal curing and slow cure times at ambient temperatures so that the uncured binder compositions and products which comprise the uncured binder compositions have improved shelf lives.
摘要:
The invention relates to vacuum flask water heater of a high safety hardware, which has features of water heater used for supply of hot water and electrically operated and can also be used as vacuum flask.
摘要:
A crosslinking agent that is an ungelled reaction product of (a) an aminoplast resin and (b) a carboxylic acid-containing compound wherein the crosslinking agent is essentially free of reactive carboxylic acid groups and has a glass transition temperature of at least 10 °C is disclosed. Methods for preparing crosslinking agents are also disclosed. Further provided is a curable powder coating composition including a polymer having a glass transition temperature of at least 30 °C containing reactive functional groups and the present crosslinking agent; a multilayer composite coating composition and substrates coated therewith are also disclosed.
摘要:
The aim of the invention is to produce polymeric networks. An aldehyde or a mixture of aldehydes or precursors thereof are condensed with a component (A) that contains amines, optionally in the presence of a solvent (S). The component (A) contains at least one amine (I) which can be obtained by means of amination of polymeric ethers of the 1.4 butanediol and is provided with at least two free amino groups. Said component (A) also and optionally contains at least one amine of the formula (II): Y (-NH2)n and optionally contains at least one amine of the formula (III): (Z-)(q-r)Y (-NH2)r, wherein Y means n-valued organic radicals, Y means q-valued organic radicals, Z means functional single-valued radicals, n means an integral value of 1 to 20, q means an integral value of 2 to 20 and r means an integral value of 1 to 19 with the proviso that 1
摘要:
The invention is an improved method for the preparation of poly-amine-quinone polymers using external oxidizing agents. The polymer produced has the general chemical formula (I) where each R is independently selected from the group of alkyl, cycloalkyl, aralkyl, aryl, silyl, siloxyl and the alkyl, alkoxy, aryl, carboxyl, amino, sulfhydryl, sulfoxyl, sulfonyl substituted derivatives thereof and n is about 50-2,000, and the molecular weight of the polymer is about 10,000 to 1,000,000, preferably about 10,000 to 40,000. The polymer can be used in anticorrosion paints and coatings, such as automotive and marine paints and coatings, and can also be used as a curing agent for epoxy resins.
摘要:
It is herein disclosed a composite system consisting essentially of a polyketone polymer and an aminated polyolefin, produced by reacting a polyolefin with excess diamine to form an imide with a free primary amine, and causing the primary amine to react with a polyketone chain to form a pyrrole. These reactions can occur during inter alia a co-extrusion hot coating application or blending process. In all cases, compatibilization is achieved by the formation of polyketone/polyolefin graft copolymers at the interface of the polymers.
摘要:
The present invention provides a process for preparing a self-standing catecholamine-based membrane, the process comprising the steps of: (a) cross-linking a catechol derivative with an amine selected from the group consisting of: a known aliphatic amine hydrocarbon of formula (II); and an aromatic amine of formula (IIbis), in a liquid medium, wherein both the catechol and the amine are soluble, at a pH comprised from 6.5 to 10, and under appropriate agitation to create a catecholamine membrane in the air/liquid interface in the absence of any support; and b) isolating the membrane resulting from step (a) from the air/liquid interface. The resulting self-standing catecholamine-based membrane was robust, easy to handle and manipulate, highly flexible and adaptable to any kind of surface without breaking, and adhesive. In addition, the free-standing membrane of the invention shows a Janus character, with an unexpected nanopatterning in the water-contact side which endows the membranes of the invention with a higher roughness surface, something of value to promote cell adhesion.
摘要:
The present invention generally relates to a new polymer composition comprising a hexaazatriphenylene (HATN)-type organic framework, which is suitable for use as a cathode in lithium ion batteries. The present invention also relates to a method of preparing of said polymer composition, preferably by condensation between cyclic polyketones and aromatic polyamines.