Akzona Incorporated

Akzo N.v.

Eduard P Magre

Hendrik Harm Oosterwijk

Cornelis R De Jonge

Gerrit Hoentjen

Wilhelmus M Beyleveld

Ulfert Elle Wiersum

Johannes Hendrinus Van Dijk

There is provided a new class of diamines of the formula ##STR1## wherein X=NH or O, and R represents a divalent, substituted or unsubstituted organic group having at the most 20 carbon atoms. The diamines, wherein X has the meaning of an O-atom, may be converted with diacids, diacid dichlorides, aromatic carboxylic acid anhydrides or diisocyanates into poly(esteraramid) amides, poly(esteraramid) imides, or poly(esteraramid) urea or, when X stands for an --NH-group, into poly(amidaramid) amides, poly(amidaramid) imides, or poly(amidaramid) urea. The wholly or largely aromatic polyamides, polyurea or polyimides are of an iterative structure. They can be melt-processed into shaped objects displaying a very good resistance to high temperatures, particularly when use is made of diamines having meta-substituted amide groups or diamines of a non-aromatic structure for the --XRX-- group, or of a non-aromatic structure of the diacids, diacid dichlorides, aromatic carboxylic acid anhydrides or diisocyanates to be linked to the diamines. By altering the chemical structure of the diamines on the one hand and the diamine-linkable bifunctional compounds on the other, both the melting performance and the level of crystallinity of the end product may be influenced.

Aromatic amide groups-containing diamines and polymers in which these

There is provided a new class of diamines of the formula ##STR1## wherein X=NH or O, and R represents a divalent, substituted or unsubstituted organic group having at the most 20 carbon atoms. The diamines, wherein X has the meaning of an O-atom, may be converted with diacids, diacid dichlorides, aromatic carboxylic acid anhydrides or diisocyanates into poly(esteraramid) amides, poly(esteraramid) imides, or poly(esteraramid) urea or, when X stands for an --NH--group, into poly(amidaramid) amides, poly(amidaramid) imides, or poly(amidaramid) urea. The wholly or largely aromatic polyamides, polyurea or polyimides are of an iterative structure. They can be melt-processed into shaped objects displaying a very good resistance to high temperatures, particularly when use is made of diamines having meta-substituted amide groups or diamines of a non-aromatic structure for the --XRX-- group, or of a non-aromatic structure of the diacids, diacid dichlorides, aromatic carboxylic acid anhydrides or diisocyanate to be linked to the diamines. By alterning the chemical structure of the diamines on the one hand and the diamine-linkable bifunctional compounds on the other, both are melting performance and the level of crystallinity of the end product may be influenced.

This invention relates to aliphatically chlorinated dicumene derivatives useful as photoinitiators in the polymerization of ethylenically unsaturated monomers such as styrene, ethylene and acrylic acid.

Novel chlorinated dicumene initiators

Novel brominated polydiisopropylarylene compounds which can be used for imparting fire retardance properties to polymers such as polystyrene and polypropylene contain bromine as a substituent on the aliphatic radicals and have the following formula: ##STR1## A is a thienylene group or an arylene group such as a substituted or unsubstituted phenylene, biphenylene, napthylene, or anthracylene group, R.sub.1 through R.sub.4 a methyl group substituted or not with bromine, R.sub.5 and R.sub.6 a bromine atom or a hydrogen atom, and n a whole number in the range of 2 to 10, the number of bromine atoms per molecule in the aliphatic groups being at least 2 and the total bromine content being not more than 70 per cent by weight.

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Heelsum, Netherlands

Eduard P Magre