摘要:
Improved molding compositions based on high-molecular polyether ester amides are obtained by heating at 180.degree.-250.degree. C. a melt containing a mixture ofA. a polyether ester amide having a relative solution viscosity .eta..sub.rel of at least 1.5; andB. 0.05-1.5 parts by weight, based on 100 parts by weight of the molding composition, of a cyclic, trimerized isophorone diisocyanate or an oligomer thereof having a degree of oligomerization of 2-5 and an isocyanate functionality of 3-7.
摘要:
Improved molding compositions based on high-molecular polyalkylene terephthalates are obtained by heating at 240.degree.-300.degree. C. a melt containing a mixture of(A) a polyalkylene terephthalate having a viscosity number J of at least 50 cm.sup.3 /g, and(B) 0.05-2.5 parts by weight, based on 100 parts by weight of the molding composition of a cyclic, trimerized isophorone diisocyanate or an oligomer thereof with a degree of oligomerization of 2-5 with an isocyanate functionality of 3-7.
摘要:
A molding composition having cold impact strength and amenable to thermoplastic processing, comprises(A) 66-95% by weight of polybutylene terephthalate with a viscosity number (J) of 70 to 240 cc/g and(B) 34-5% by weight of a reaction product of1. 99-75% by weight of an ethylene/.alpha.-olefin/diene terpolymer having a Mooney viscosity in the range from 30 to 130 and2. 1-25% by weight of bicyclo[2,2,2]-2,3;5,6-dibenzooctadiene-(2,5)-dicarboxylic acid-(7,8)-anhydride.
摘要:
A thermoplastic resin composition, which comprises (a) from 5 to 85 parts by weight of a melted or remelted preliminary molding compound consisting of from 60 to 98 parts by weight of polyphenylene ethers, 40 to 2 parts by weight of polyoctylenes, from 0.1 to 5 parts by weight of maleic anhydride and from 0.1 to 5 parts by weight of a further acid derivative which has a melting point below 100.degree. C. and which is selected from the group consisting of an unsaturated mono- or dicarboxylic acid having up to 14 carbon atoms, an anhydride thereof, which excludes maleic anhydride, and an ester of mono- or dicarboxylic acid with an alcohol of up to 6 carbon atoms; and (b) from 95 to 15 parts by weight of an aliphatic homopolyamide or a copolyamide containing a preponderant amount of aliphatic monomer units.
摘要:
Odorferous 2-alkoxyethyl-cycloalkyl-ethers of the formula ##STR1## wherein R is a saturated or unsaturated aliphatic hydrocarbon residue of 1-3 carbon atoms andn is an integer of 5 to 11 are valuable odoriferous substances possessing a woodsy scent and good fixative properties.
摘要:
A process for the production of cyclic esters of undecanedioic acid with aliphatic diols comprising thermolyzing the corresponding linear polyesters derived from said acid and said diols under reduced pressure at temperatures of 200.degree.-300.degree. C in the presence of organotin and phosphonate catalysts, wherein the organotin catalyst is of the formula ##STR1## wherein R.sub.1 and R.sub.2 are alkyl of 1-18 carbon atoms, or aryl or aralkyl each of 6-36 carbon atoms, and the phosphonate is O,O-dialkyl-(3,5-di-tert-butyl-4-hydroxybenzyl)-phosphonate, the alkyl groups of which each contain 2-18 carbon atoms.
摘要:
Cyclic esters of dodecanedioic acid with aliphatic diols of 2-12 carbon atoms in the chain and substituted by up to two alkyl of 1-4 carbon atoms, are produced by thermolysis of corresponding linear polyesters under reduced pressure in the presence of catalysts by subjecting the linear polyesters to thermolysis at temperatures between 200.degree. and 300.degree. C., and by utilizing as catalyst a tin(II) salt of an aliphatic monocarboxylic acid of up to 18 carbon atoms, of an aromatic or araliphatic monocarboxylic acid of up to 36 carbon atoms, of an aliphatic or aromatic hydroxy-, poly-, ketocarboxylic acid or of a dicarboxylic acid of up to 18 carbon atoms; or a mixture of an organotin compound of the formula ##STR1## wherein R.sub.1 and R.sub.2 are alkyl of 1-18 carbon atoms, or aryl or aralkyl of 6-36 carbon atoms, and an O,O-dialkyl-(3,5-di-tert.-butyl-4-hydroxybenzyl)-phosphonate wherein each alkyl is of 2-18 carbon atoms.
摘要:
Aliphatic ethers of hydroxymethylcyclododecane of the general formula ##STR1## wherein R is a saturated or unsaturated aliphatic hydrocarbon residue of 1-4 carbon atoms, are valuable odoriferous substances possessing a long-lasting, intense woodsy scent with a balsam note of great richness.
摘要:
Cyclic esters of dodecanedioic acid with aliphatic diols of 2-12 carbon atoms in the chain and substituted by up to two alkyl of 1-4 carbon atoms, are produced by thermolysis of corresponding linear polyesters under reduced pressure in the presence of catalysts by subjecting the linear polyesters to thermolysis at temperatures between 200.degree. and 300.degree. C., and by utilizing as catalyst a tin(II) salt of an aliphatic monocarboxylic acid of up to 18 carbon atoms, of an aromatic or araliphatic monocarboxylic acid of up to 36 carbon atoms, of an aliphatic or aromatic hydroxy-, poly-, ketocarboxylic acid or of a dicarboxylic acid of up to 18 carbon atoms; or a mixture of an organotin compound of the formula ##STR1## wherein R.sub.1 and R.sub.2 are alkyl of 1-18 carbon atoms, or aryl or aralkyl of 6-36 carbon atoms, and an O,O-dialkyl-(3,5-di-tert.-butyl-4-hydroxybenzyl)-phosphonate wherein each alkyl is of 2-18 carbon atoms.
摘要:
A process for the production of pol-(butylene terephthalate) of sufficiently high molecular weight for subsequent extrusion processing without the need of a solid phase post-condensation and at polycondensation pressures greater than now in general use. Polycondensation is carried out in the presence of small amounts of copolymers of an .alpha.-olefin or styrene with free or esterified maleic acid or anhydride.