Abstract:
A process for preparing a crystalline poly(cyclohexanedimethylene terephthalate) comprising(A) preparing an admixture of molten poly(cyclohexanedimethylene terephthalate) and a 4A zeolite, and(b) cooling the admixture at a rate less than about 1000.degree. C. per minute to a temperature less than about 80.degree. C.
Abstract:
A process for preparing a polymer having repeating units corresponding to the structure ##STR1## wherein y is in the range of 0.005 to 0.15, x is in the range of 0.02 to 0.25, n is at least 200, and R a divalent aromatic radial. The polymer is prepared by reacting a diiodoaromatic compound and elemental sulfur.
Abstract:
A process for preparing a polymer having repeating units corresponding to the structure ##STR1## wherein R is ##STR2## y is in the range of 0.005 to 0.10, x is in the range of 0.01 to 0.50 when R is ##STR3## x is in the range of 0.01 to 0.30 when R is ##STR4## and n is at least 200. The polymer is prepared by reacting a diiodoaromatic compound and elemental sulfur.
Abstract:
A process for preparation of an aromatic dimer compound corresponding to the structureIxAr-ArIxwherein x is 0, 1, 2, 3, 4, or 5 and Ar is a divalent aromatic radical containing 6 to 14 carbon atoms comprising contacting, at a sufficient temperature and pressure in the absence of carbon monoxide and in the absence of an alkali metal compound or an alkaline earth metal compound, platinum and an aromatic iodide compound corresponding to the structureAr-Ixwhere Ar is a monovalent aromatic radical and x is 1, 2, 3, 4, 5, or 6.
Abstract:
A process for preparing a copoly(arylene sulfide) corresponding to the structure[(--A--S--).sub.1-x (--A--S--S--).sub.x ].sub.nwherein x is in the range of 0.5 to 0.001 by reacting a mixture of a diiodoaromatic compound and elemental sulfur in the absence of a basic material and in the presence of a catalytic amount of an organic amine-containing compound.
Abstract:
A process for producing iodophenols which comprises contacting phenol, a source of iodine and molecular oxygen in an aqueous medium to produce an iodophenol.
Abstract:
Disclosed is a process for the co-production of aromatic carboxylates and alkyl iodides by the carbonylation of aromatic iodides in the presence of an alkanol and a rhodium catalyst.
Abstract:
Disclosed is a process for the co-production of aromatic carboxylic esters and alkyl iodides by the carbonylation of aromatic iodides in the presence of an ether and a rhodium catalyst.
Abstract:
Disclosed is a process for production of aromatic carboxylic acids by the carbonylation of aromatic iodides in the presence of a ruthenium catalyst, a Bronsted base, and an iodide promoter.
Abstract:
Disclosed are novel anthraquinone compounds containing tetra-p-phenylenediamine substituents, particularly useful in molding type polyester compositions and possessing strong infrared absorptivity. This property renders these compounds attractive as additives for increasing the infrared energy absorptivity of polyesters either from high intensity quartz lamps or from certain laser systems. These compounds are particularly useful in bottle polyester material for increasing the blow-mold parison reheat rate, and in the printing of plastic articles with lasers.