The invention relates to a mixture of at least one dialkylphosphinic acid of the formula (I)

##STR00001##

in which R.sup.1, R.sup.2 are the same or different and are each C.sub.1-C.sub.18-alkyl, C.sub.2-C.sub.18-alkenyl, C.sub.6-C.sub.18-aryl, C.sub.7-C.sub.18-alkylaryl, with at least one different dialkylphosphinic acid of the formula (II)

##STR00002##

in which R.sup.3, R.sup.4 are the same or different and are each C.sub.1-C.sub.18-alkyl, C.sub.2-C.sub.18-alkenyl, C.sub.6-C.sub.18-aryl and/or C.sub.7-C.sub.18-alkylaryl, with the proviso that at least one of the R.sup.3 and R.sup.4 radicals is different than R.sup.1 and R.sup.2.

The present teachings contemplate a method that includes a step of providing a first amount of esterified reaction product of an acid and an epoxy-based material. The esterified reaction product may be further reacted an epoxy resin to form a polymeric epoxy. The resulting material may have a generally linear backbone, foaming and curing capability and flame retardant properties.

The present teachings contemplate a method that includes a step of providing a first amount of esterified reaction product of an acid and an epoxy-based material. The esterified reaction product may be further reacted an epoxy resin to form a polymeric epoxy. The resulting material may have a generally linear backbone, foaming and curing capability and flame retardant properties.

A resinous polymer compound used as a durable surface coating that maximizes content of epoxidized soybean oil (“ESO”) in lieu of bisphenol-A epoxy and hydrogenated bisphenol-A epoxy at various proportions to produce a less brittle, more elastic (flexible) film that, at various weight-percentages of substitution, presents a rapid enough reaction rate for efficient commercial production and yields a colorless and transparent film while lessening the amount of synthetic, petroleum-derived ingredients.

A flame retardant containing composition resistant to becoming sticky from moisture is prepared by the introduction of epoxy containing compound either into the ethyleneamine polyphosphates or into the polymeric composition.

A composition formed of an epoxy resin incorporating a fire retardant.

Provided is a novel phosphorus-containing compound represented by general formula (I). The compound has reactivity with a glycidyl group and is therefore capable of providing a curing epoxy resin composition that is expected to achieve flame retardation and reduction of dielectric constant. ##STR00001##
wherein m is a number of 1 to 10; R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are each hydrogen, alkyl, or aryl; R.sup.5 is alkyl, alkanediyl, alkanetriyl, alkanetetrayl, or an aromatic group; X is oxygen or sulfur; Y is oxygen, sulfur, or ═NR′; and R′ is hydrogen, alkyl, or aryl.

The present invention relates to a modified epoxy acrylate and a method for producing the same, a photoresist composition and a method for producing the same, and a transparent photoresist formed from the photoresist composition. The modified epoxy acrylate is an epoxy acrylate modified with phosphate monomer which has a structure represented by Formula I ##STR00001## wherein, n is an integer selected from 1˜21, R is a short-chain carboxylic acid ester group having the structural formula ##STR00002##  in which p is a bivalent saturated or unsaturated carbon chain having 1˜10 carbon atoms, and the carbon chain is optionally substituted by alkyl, alkenyl, hydroxy, nitro or halogen. Since the phosphate can react with the multi-valence metal in substrates so as to connect the polymer onto the substrates firmly through covalent bonds, therefore the adhesion force is improved significantly and the protective function of the tranparent photoresist is improved accordingly.

To show a curable resin composition suitable as an adhesive for bonding a structural material having good adhesiveness to aluminum in particular. A curable resin composition containing (A1) phosphoric acid-modified epoxy resin obtained by reacting a phosphoric acid (a1) and an epoxy compound (a2) (excluding a urethane-modified epoxy resin and a urethane-modified chelate epoxy resin); and (A2) an epoxy resin (excluding component (A1)); (B) a block urethane; and (C) a latent curing agent, in which a phosphorus content in a total mass of component (A1) and component (A2) is 0.01 to 2.0% by mass.

Phosphorus-containing flame retardant mixtures, a process for production of said mixtures and use of said mixtures, and also epoxy resin formulations which comprise said flame retardant mixtures. The present invention relates to phosphorus-containing flame retardant mixtures, comprising individual flame retardants having in each case one or more functional groups of the formulae (I), (II) and (III), where, based on the total quantity of functional groups in the flame retardant mixture, 1 to 98 mol % of functional groups of the formula (I), 1 to 35 mol % of functional groups of the formula (II) and 1 to 98 mol % of functional groups of the formula (III) are present, and where R.sup.1 and R.sup.2 are identical or different and are mutually independently hydrogen, C.sub.1- to C.sub.12-alkyl, linear or branched, and/or C.sub.6- to C.sub.18-aryl and the entirety of (I), (II) and (III) is always 100 mol %.

##STR00001##