Abstract:
The present invention provides a phenol resin composition which imparts excellent heat resistance and flame retardancy in a cured article, the cured article, a resin composition for a copper-clad laminate, and a copper-clad laminate having both excellent heat resistance and flame retardancy. Disclosed is a phenol resin composition comprising a phenol resin (I) having a chemical structure (A) represented by structural formula (1) shown below in which an aromatic hydrocarbon group substituted with a carboxyl group is bonded to a triazine ring, as a partial structure in the molecular structure, and a curing agent (II) as essential components.
Abstract:
Condensation of products obtained by condensation of a mixture comprising(A) from 90 to 99.9 mol % of a mixture consisting essentially of(a) from 30 to 100 mol % of melamine and(b) from 0 to 70 mol % of a substituted melamine of the formula I ##STR1## where X, X' and X" are as defined in the specification, or mixtures of melamines I, and(c) from 1 to 70 mol %, based on (a)+(b), of a substituted triazine of the formula II ##STR2## where R", Z' and Z" are as defined in the specification, or mixtures of triazines II, and(B) from 0.1 to 10 mol %, based on (A) (a), (A) (b) and (B), of phenols which are unsubstituted or are substituted by radicals selected from the group consisting of C.sub.1 -C.sub.9 -alkyl and hydroxyl, C.sub.1 -C.sub.4 -alkanes substituted by two or three phenol groups, di(hydroxyphenyl)sulfones or mixtures of these phenols,withformaldehyde or formaldehyde-supplying compounds in a molar ratio of melamine, substituted melamine I and triazine II to formaldehyde within the range from 1:1.15 to 1:4.5, are useful for making molded articles.
Abstract:
A binder composition for producing articles of bonded particulate material such as foundry moulds or cores comprises an alkaline aqueous solution of a resol phenol-aldehyde resin, an oxyanion which can form a stable complex with the resin, and pyrrolidone or an N-substituted pyrrolidone, and the amount of alkali present in the solution is sufficient to substantially prevent stable complex formation between the resin and the oxyanion. Bonded articles are produced by passing carbon dioxide gas through articles formed from a mixture of particulate material and the binder composition so as to produce stable complex formation and curing of the resin.
Abstract:
A condensation polymer, obtainable by condensation of a mixture containing, as chief components,(A) from 90 to 99.9% molar of a mixture substantially consisting of(a) from 30 to 99% molar of melamine and(b) from 1 to 70% molar of a substituted melamine of the general formula I ##STR1## in which X, X', and X" are selected from the group consisting of --NH.sub.2, --NHR, and --NRR', and only one or two of X, X', and X" denote(s) --NH.sub.2, and R and R' are selected from the group consisting of hydroxy-C.sub.2 -C.sub.10 -alkyl, hydroxy-C.sub.2 -C.sub.4 -alkyl-(oxa-C.sub.2 -C.sub.4 -alkyl).sub.n, where n is an integer from 1 to 5, and amino-C.sub.2 -C.sub.12 -alkyl, or mixtures of melamines I, and(B) from 0.1 to 10% molar, based on (A) and (B), of unsubstituted phenols or phenols substituted by radicals selected from the group consisting of C.sub.1 -C.sub.9 -alkyl and hydroxy, or of C.sub.1 -C.sub.4 -alkanes substituted by two or three phenol groups, di(hydroxyphenyl)sulfones, or mixtures of said phenols,with formaldehyde or formaldehyde-liberating compounds, the molar ratio of melamine to formaldehyde ranging from 1:1.15 to 1:4.5.
Abstract:
A phenolic resin can be obtained by a condensation reaction between a specific trifunctional aromatic compound and a phenolic compound. This resin can be reacted with a curing agent such as a hexamine to give cured articles having excellent heat resistance, electrical properties, wear resistance and chemical resistance, and the phenolic resin is also much more excellent in curing reactivity as compared with conventional techniques.
Abstract:
The present invention provides a series of easily processable poly(ether-imide)s that are organic-soluble and can afford colorless films, their organic solutions and their manufacturing process. The poly(ether-imide) is prepared from a dianhydride and a diamine, wherein the dianhydride is a bis(ether anhydride) having tert-butyl group, i. e. 1,4-bis(3,4-dicarboxyphenoxy)-2-tert-butylbenzene dianhydride.
Abstract:
A process for preparing low-salt preparations of condensation products based onA) sulphonated aromatics,B) aldehydes and/or ketones and optionallyC) one or more compounds selected from the group consisting of nonsulphonated aromatics, urea and urea derivatives,characterized in that inorganic acid present after the condensation is separated off in whole or in part from the condensation product, optionally in the form of its salts after neutralization, until the inorganic salt content is less than 10% by weight, relative to the preparation, leads to preparations which are outstandingly suitable as tanning agents, dispersants and liquefiers.
Abstract:
A phenolic resin can be obtained by a condensation reaction between a specific trifunctional aromatic compound and a phenolic compound. This resin can be reacted with a curing agent such as a hexamine to give cured articles having excellent heat resistance, electrical properties, wear resistance and chemical resistance, and the phenolic resin is also much more excellent in curing reactivity as compared with conventional techniques.
Abstract:
Condensation products obtained by condensation of(A) a mixture consisting of(a) a triazine of the general formula I ##STR1## and (b) a mixture consisting of(b1) a triazine of the general formula II ##STR2## (b2) a substituted melamine of the general formula III ##STR3## (B) phenols withformaldehyde or formaldehyde-donating compounds are useful for producing shaped articles, especially fibers and foams.
Abstract:
The present invention provides a series of easily processable poly(ether-imide)s that are organic-soluble and can afford colorless films, their organic solutions and their manufacturing process. The poly(ether-imide) is prepared from a dianhydride and a diamine, wherein the dianhydride is a bis(ether anhydride) having tert-butyl group, i.e. 1,4-bis(3,4-dicarboxyphenoxy)-2-tert-butylbenzene dianhydride. The present invention is also directed to synthesis of this special dianhydride.