Abstract:
Provided is a two-part composition. The first part is an epoxy terminated polyester having the structure wherein R1- is G- is -A- is a divalent alkyl group, -CA- is a divalent cycloalkyl group, and -R2- is a divalent organic group. The second part is an epoxy curing agent.
Abstract:
Provided are [1] a xylylenediamine composition containing xylylenediamine and 1,2-ditolylethane wherein the content of 1,2-ditolylethane is 0.001 to 0.02 parts by mass based on 100 parts by mass of the xylylenediamine; and [2] a method for producing a polyamide resin including the steps of introducing a diamine containing xylylenediamine, a dicarboxylic acid, and 1,2-ditolylethane into a reaction system and performing polycondensation reaction, wherein the amount of the 1,2-ditolylethane to be introduced is 0.001 to 0.02 parts by mass based on 100 parts by mass of the xylylenediamine.
Abstract:
The invention relates to a multi-component composition comprising a solid component comprising calcined paper sludge and one or more aggregates, and a binder component comprising an organic binder selected from one or more polyols, one or more epoxy resins and a polymer latex dispersion, and, if the organic binder is one or more polyols or one or more epoxy resins, a hardener component comprising an isocyanate hardener for polyol or an amine hardener for epoxy resin, wherein the multi-component composition further comprises water which is contained in the binder component or, if present, in the hardener component. The composition is a cement-free or cement-reduced low dust hybrid composition and is suitable as a grout or for preparing floorings or coatings. The properties obtained are comparable to corresponding polymer cement concrete systems.
Abstract:
The present invention relates to styrenated phenol useful as a curing agent or a plasticizing agent for an epoxy resin. More particularly, it relates to use of styrenated phenol, which has viscosity and curing properties similar to those of nonylphenol and exhibits superior curing properties for an epoxy resin, as a curing agent or a plasticizing agent for an epoxy-cured paint.
Abstract:
Cured epoxy resins are widespread because of their excellent mechanical and chemical properties. Typically, epoxy resins based on bisphenol A diglycidyl ethers or bisphenol F diglycidyl ethers are used, but these are problematic for many sectors because of their effect on the endocrine system. The present invention relates to glycidyl ethers of divinylbenzene-based diols and/or polyols, and to curable epoxy resin compositions based thereon as alternatives to the bisphenol A diglycidyl ethers or bisphenol F diglycidyl ethers, or the epoxy resin compositions based thereon.
Abstract:
Cured epoxy resins are widespread because of their excellent mechanical and chemical properties. Typically, epoxy resins based on bisphenol A diglycidyl ethers or bisphenol F diglycidyl ethers are used, but these are problematic for many sectors because of their effect on the endocrine system. The present invention relates to glycidyl ethers of limonene-based diols and/or polyols, and to curable epoxy resin compositions based thereon as alternatives to the bisphenol A diglycidyl ethers or bisphenol F diglycidyl ethers, or the epoxy resin compositions based thereon.
Abstract:
A new class of poly(beta-amino alcohols) (PBAAs) has been prepared using combinatorial polymerization. The inventive PBAAs may be used in biotechnology and biomedical applications as coatings (such as coatings of films or multilayer films for medical devices or implants), additives, materials, excipients, non-biofouling agents, micropatterning agents, and cellular encapsulation agents. When used as surface coatings, these PBAAs elicited different levels of inflammation, both in vitro and in vivo, depending on their chemical structures. The large chemical diversity of this class of materials allowed us to identify polymer coatings that inhibit macrophage activation in vitro. Furthermore, these coatings reduce the recruitment of inflammatory cells, and reduce fibrosis, following the subcutaneous implantation of carboxylated polystyrene microparticles. These polymers may be used to form polyelectrolyte complex capsules for cell encapsulation. The invention may also have many other biological applications such as antimicrobial coatings, DNA or siRNA delivery, and stem cell tissue engineering.
Abstract:
An adhesive material comprises a polymeric component, a heat conductive filler and a curing agent. The polymeric component comprises 30%-60% by volume of the adhesive material, and comprises thermoset epoxy resin and polymeric modifier configured to improve impact resistance of the thermoset epoxy resin. The polymeric modifier comprises thermoplastic, rubber or the mixture thereof. The polymeric modifier comprises 4%-45% by volume of the polymeric component. The heat conductive filler is evenly dispersed in the polymeric component, and comprises 40%-70% by volume of the adhesive material. The curing agent is capable of curing the thermoset epoxy resin at a temperature below 140° C. The adhesive material has a heat conductivity greater than 3 W/m-K.
Abstract:
The present invention relates to curing agents for epoxy resins including an alkylated polyethyleneimine. These curing agents have high functionality and a high content of secondary amino groups. Together with epoxy resins, they cure surprisingly quickly and without blushing effects even under humid and cold conditions to form films having very high cross-linking density. They are suited for coatings with high resistance requirements.
Abstract:
The invention provides novel flame-retardant polymers and materials, their synthesis and use. More particularly, the flame-retardant polymers are deoxybenzoin-derived polymers.