摘要:
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.
摘要:
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)--Q--T(OR).sub.1+m-r (EB).sub.r (3),in whichQ is a group of the formula (4) ##STR3## in which R.sup.0 is a phenyl radical substituted in a particular manner andR.sup.1 andR.sup.2 are C.sub.1 -C.sub.4 alkyl, and in which, furthermore,EB symbolizes a free valency of the group T,r has one of the values 0, 1 or 1+mand the structural units of the formula (3) are linked via their free valencies to the group [Z] such that the groups Q in each case alternate with groups T and the group [Z] overall is monovalent. As excellent flameproofing agents which are reactive towards epoxy compounds, the compounds are a useful formulation component for epoxy resin compositions.
摘要:
Compounds of general formula I ##STR1## wherein X.sub.1 is chloro or bromo,X.sub.2 is chloro, bromo or hydrogen, andY is O or S, andR.sub.1 and R.sub.2 are each independently of the other C.sub.1 -C.sub.4 alkyl, andR.sub.3 and R.sub.4 is a group of formula II ##STR2## which carries identical or different substituents and wherein R.sub.1, R.sub.2, X.sub.1 and X.sub.2 are as defined above, or R.sub.3 and R.sub.4, when taken together, form a group of formula III ##STR3## wherein R.sub.1 and R.sub.2 are as defined above, are very suitable flame retardants for polymers.
摘要:
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.
摘要:
A linear axle for contactless energy transmission has a belt with an electrical conductor, a movable carriage and a circuit that is movable with the carriage and which is electrically connected with the conductor. In addition, a locationally fixed circuit and an inductive coupling device are provided to inductively couple electrical energy from the locationally fixed circuit into the conductor of the belt.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.