Abstract: Copolymers comprising carbon monoxide and ethylene contain at least one type of ketal structure and possess enhanced thermal stability so as to be useful in the melt processing of fibers. These novel copolymers, as well as known polyketones with ketal structures, can be formed by treating a copolymer of carbon monoxide and at least one olefin with a mixture of acid, such as a sulfonic acid, which acts as a catalyst or catalyst/reagent, and alcohol, such as a lower alkanol.

Abstract: Diamines having a 1,1,3-trimethylphenylindane dicarboxylic moiety linked on both sides to phenylene diamine by an amide bond (PIDA diamines) are disclosed. By reacting these diamines with aromatic difunctional acid derivatives, amorphous polymers having high glass transition temperatures (Tg) can be prepared. If aliphatic diacid derivatives are used the resulting polymers have a lower Tg, but have the advantage of melt-processability. The PIDA-diamines can also be used in the preparation of polyimides, being reacted either with tri-or tetracarboxylic anhydrides or with imide group-containing acid derivatives.

Abstract: 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.

Abstract: Diamines having a 1,1,3-trimethylphenylindane dicarboxylic moiety linked on both sides to phenylene diamine by an amide bond (PIDA diamines) are disclosed. By reacting these diamines with aromatic difunctional acid derivatives, amorphous polymers having high glass transition temperatures (Tg) can be prepared. If aliphatic diacid derivatives are used the resulting polymers have a lower Tg, but have the advantage of melt-processability. The PIDA-diamines can also be used in the preparation of polyimides, being reacted either with tri- or tetracarboxylic anhydrides or with imide group-containing acid derivatives.

Abstract: 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.

Abstract: Novel monochloro-s-triazine derivatives of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are independently alkyl or substituted alkyl of 6 to 20 carbon atoms, alkenyl having 6 to 20 carbon atoms, cycloalkyl having 6 carbon atoms, or furfuryl, and which derivatives provide antioxidants and UV stabilizers for polymers such as polyolefins are prepared by reacting an alcohol with cyanuric chloride in the presence of an acid acceptor having a pK.sub.b .ltoreq.3, in an organic solvent which is inert to the reaction components.

Abstract: Novel monochloro-s-triazine derivatives of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are independently alkyl or substituted alkyl of 6 to 20 carbon atoms, alkenyl having 6 to 20 carbon atoms, cycloalkyl having 6 carbon atoms, or furfuryl, and which derivatives provide antioxidants and UV stabilizers for polymers such as polyolefins are prepared by reacting an alcohol with cyanuric chloride in the presence of an acid acceptor having a pK.sub.b .ltoreq.3, in an organic solvent which is inert to the reaction components.