A flame-retardant resin composition which comprises (A) 100 parts by weight of an unhalogenated epoxy resin having at least two epoxy groups in one molecule, (B) 20 to 205 parts by weight of a maleimide compound having at least one maleimido group in one molecule, (C) 20 to 65 parts by weight of a curing agent having an amino group and (D) a phosphorus compound in a proportion of 0.5 to 4.5 parts by weight in terms of phosphorus element per 100 parts by weight of a total of the components (A), (B) and (C), provided that the proportion of nitrogen element contained in the composition is 2.0 to 10.0 parts by weight per 100 parts by weight of the total composition. The above flame-retardant resin composition has a high flame retardance without adding a halogen compound and does not deteriorate the characteristics of commercial products.
The present invention provides a resin applied-copper foil, which is free of halogen elements, having high flame retardancy, excellent water resistance, heat resistance, and good peeling strength between a base material and copper foil. To provide the a resin compound used for fabricating an interlayer dielectric of a printed wiring board, the resin compound comprises an epoxy-based resin which includes: an epoxy resin curing agent having 5 to 25% by weight of nitrogen; and maleimide compounds having thermosetting properties, and the resin compound further has composition which is free of halogen elements.
The present invention relates to a novel flame retardant system for polymers comprising a mixture of two different aryl phosphates, to its preparation, and to its use.
There is provided compounds of formula I, ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sub.x, Y, n and B have meanings given in the description which are useful as competitive inhibitors of trypsin-like proteases, such as thrombin, and in particular in the treatment of conditions where inhibition of thrombin is required (e.g. thrombosis) or as anticoagulants.
There is provided compounds of formula I, ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.x, Y, n and B have meanings given in the description which are useful as competitive inhibitors of trypsin-like proteases, such as thrombin, and in particular in the treatment of conditions where inhibition of thrombin is required (e.g. thrombosis) or as anticoagulants.
There is provided compounds of formula I, ##STR1## wherein R.sup.1, R.sub.x, Y, R.sup.y, n and B have meanings given in the description which are useful as competitive inhibitors of trypsin-like proteases, such as thrombin, and in particular in the treatment of conditions where inhibition of thrombin is required (e.g. thrombosis) or as anticoagulants.
