Ciba-geigy Corporation

Shin-etsu Chemical Co., Ltd.

Giba-geigy Corporation

Peter Flury

Sameer H Eldin

Martin Roth

Wolfgang Scharf

Toshio Shiobara

Carl W Mayer

Takayuki Aoki

Eiichi Asano

Andreas Muhlebach

Alex Alder

Charles E Monnier

Claus W Rabener

Ennio Vanoli

Tadashi Okada

An epoxy resin composition comprising (A) 20-80 parts by weight of an epoxy resin, (B) 20-80 parts by weight of a curing agent, (C) 0.1-50 parts by weight of a phosphorus-containing flame retardant, and (D) 200-1,200 parts by weight of an inorganic filler cures into products having improved high-temperature exposure resistance, flame retardancy, and reflow cracking resistance. The composition eliminates blending of antimony trioxide and brominated compounds and is useful in encapsulating semiconductor devices for imparting high-temperature reliability.

Semiconductor encapsulating epoxy resin compositions and semiconductor

The present invention relates to a curable mixture which is useful in the formation of castings and which contains (a) an epoxy resin and (b) a mixture of oligomeric cyanoguanidines obtained by the reaction between a monoisocyanate and a diisocyanate to give a carbodiimide which is subsequently reacted with cyanamide.

Oligomeric cyanoguanidines

The invention relates to compounds of the formula (1) ##STR1## in which m is 0 or 1, R is a hydrogen atom or a group of formula ##STR2## T is either an (m+2)-valent aromatic group or a bisphenylene group, [Z] is a group of on average 1 to 10 structural units of the formula (3)

Phosphorus-containing flameproofing agents for epoxy resin materials

Oligomeric cyanoguanidines of formula I ##STR1## wherein, for example, R.sup.1 and R.sup.2 are each phenyl, R is 1,4-phenylene and n is an integer from 1 to 20, are suitable latent hardeners for epoxy resins. They are readily soluble in solvents suitable for the application of epoxy resins, and the cured products obtained therewith have a high glass transition temperature.

Oligomeric cyanoguanidines hardeners for epoxy resins

Curable compositions based on epoxy resins or a mixture of epoxy resins and polyisocyanates and containing at least one compound of formula I: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8 and R.sub.9 are each independently of one another hydrogen, alkyl, aryl, arylalkyl or halogen, and R.sub.2 together with R.sub.3 and R.sub.5 together with R.sub.6 and R.sub.8 together with R.sub.9 may each also represent a fused benzene ring. The compositions have high reactivity and at the same time good storage stability.

Curable compositions based on epoxy resins or mixtures of epoxy resins

Compounds of the general formula ##STR1## wherein R.sub.1 and R.sub.2 are each independently of the other hydrogen, C.sub.1 -C.sub.6 alkyl, or phenyl or naphthyl, each unsubstituted or substituted by 1 to 3 C.sub.1 -C.sub.4 alkyl groups, R.sub.3 and R.sub.4 are each independently of the other hydrogen or C.sub.1 -C.sub.4 alkyl, with the proviso that R.sub.3 and R.sub.4 may not simultaneously be hydrogen, and R.sub.5 is hydrogen, C.sub.1 -C.sub.6 alkyl, or phenyl or naphthyl, each unsubstituted or substituted by 1 to 3 C.sub.1 -C.sub.4 alkyl groups, and X is oxygen or sulfur, are very suitable flame retardants for polymers.

Flame retardant compositions of halogen-free polymers containing cyclic

Compounds of general formula I ##STR1## wherein X.sub.1 is chloro or bromo,

Phosphorus compounds and their use as flame retardant for polymers

Cyclic phosphates and thiophosphates useful as flame retardants for

The invention relates to copolymers consisting of 30-100 mol %, relative to the total polymer, of structural units of the formulae I and II, the proportion of structural units of the formula I, relative to the proportion of I and II, being 5 to 95 mol %, ##STR1## in which R.sup.1 is C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 alkoxy or halogen, R.sup.2 is hydrogen or --COR.sup.3 and R.sup.3 is C.sub.1 -C.sub.20 alkyl, m is 1, 2 or 3, n is 0, 1, 2, 3 or 4 and the sum of m and n is not more than 5, and A is selected from the group of radicals consisting of halogen, cyano or structural units of the formulae III to VIII ##STR2## in which R.sup.4 and R.sup.6 independently of one another are hydroxyl, ##STR3## or glycidyl groups of the formula IXa or IXb ##STR4## R.sup.5 and R.sup.7 independently of one another are C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 -alkoxy or halogen, o and q independently of one another are 0, 1, 2 or 3, p and r independently of one another are 0, 1,2,3, 4 or 5, it being necessary for the totals o+p and q+4 to be not more than 5, R.sup.8 is hydrogen, C.sub.1 -C.sub.20 -alkyl, a glycidyl radical of formula IXa or a radical of formula VI, R.sup.9 is hydrogen, C.sub.1 -C.sub.20 -alkyl, cycloalkyl having 5-7 ring C atoms, phenyl, naphthyl or benzyl, R.sup.10 is hydrogen, C.sub.1 -C.sub.20 - or a glycidyl radical of the formula IXa, and the groups R.sup.11 and R.sup.12 independently of one another are hydrogen, C.sub.1 -C.sub.20 -alkyl, cycloalkyl having 5-7 ring C atoms, aryl or aralkyl which is substituted or unsubstituted or a glycidyl radical of the formula IXa, or, together with the common nitrogen atom, form a five-membered or six-membered, non-aromatic, heterocyclic ring, and R.sup.13 and R.sup.14 independently of one another are hydrogen or methyl, it being possible for the radicals R.sup.1 to R.sup.14 and A of a polymer molecule to be different, within the definitions given. The compounds are distinguished by high glass transition temperatures and good flexibility and can be employed as binders in photoresist systems. The representatives containing glycidyl groups can also be used as self-crosslinking epoxide resins.

Copolymes formed from N-hydroxyphenylmaleinimide (derivatives) and allyl

Curable epoxy resin compositions containing cyanoguanidines of formula I ##STR1## wherein, for example, R.sup.1 and R.sup.2 are phenyl, as latent hardeners, have good properties and are especially suitable for use as laminating resins.

Cyanoguanidines as hardeners for epoxy resins

Orthocarbonates of the formula I ##STR1## in which R is C.sub.1 -C.sub.4 alkyl, x is zero, 1 or 2, and A is a trivalent radical derived from an aliphatic triol by omitting the hydroxyl groups, the hydroxyl groups of the triol being bonded to different carbon atoms, are suitable as cocomponents in the curing of epoxy resins in that they limit the reduction in volume occurring during curing of epoxy resins. In addition, the cured resins are distinguished by increased flexural strength and impact strength.

Orthocarbonates

The invention relates to compounds of the formula I ##STR1## in which A is a group ##STR2## R.sup.1 is hydrogen or methyl R.sup.2 is C.sub.1 -C.sub.6 -alkyl, halogen or phenyl,

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Himmelried, Switzerland

Peter Flury