Patent ID: 6111058
Filing Date: 2000-08-29
Classification: B65D,C08G,C08L,Y02W

Abstract:
A biodegradable polyesteramide Q1 with a molecular weight (M.sub.n) of from 5,000 to 50,000 g/mol, a viscosity number of from 30 to 450 g/ml (measured in o-dichlorobenzene/phenol (50/50 ratio by weight) at a concentration of 0.5% by weight of polyesteramide Q1 at 25.degree. C.) and a melting point of from 50 to 220.degree. C., obtained by reacting a mixture consisting essentially of(a1) from 95 to 99.9% by weight of a polyesteramide P1 obtained by reacting a mixture consisting essentially of(b1) a mixture consisting essentially of35-95 mol % of adipic acid or ester-forming derivatives thereof or mixtures thereof,5-65 mol % of terephthalic acid or ester-forming derivatives thereof or mixtures thereof, and0-5 mol % of a compound containing sulfonate groups, where the total of the individual mole percentages is 100 mol %, and(b2) a mixture consisting essentially of(b21) 99.5-0.5 mol % of a dihydroxy compound selected from the group consisting of C.sub.2 -C.sub.6 -alkanediols and C.sub.5 -C.sub.10 -cycloalkanediols,(b22) 0.5-99.5 mol % of an amino-C.sub.2 -C.sub.12 -alkanol or of an amino-C.sub.5 -C.sub.10 -cycloalkanol, and(b23) 0-50 mol % of a diamino-C.sub.1 -C.sub.8 -alkane,(b24) 0-50 mol % of a 2,2'-bisoxazoline of the general formula I ##STR6## where R.sup.1 is a single bond, a (CH.sub.2).sub.q -alkylene group with q=2, 3 or 4, or a phenylene group, where the total of the individual mole percentages is 100 mol %,and where the molar ratio of (b1) to (b2) is from 0.4:1 to 1.5:1,with the proviso that the polyesteramide P1 has a molecular weight (M.sub.n) of from 4,000 to 40,000 g/mol, a viscosity number of from 30 to 350 g/ml (measured in o-dichlorobenzene/phenol (50/50 ratio by weight) at a concentration of 0.5% by weight of polyesteramide P1 at 25.degree. C.) and a melting point of from 50 to 220.degree. C., and with the further proviso that from 0 to 5 mol %, based on the molar amount of component (a1) used , of at least one compound D having three to six hydroxyl groups or carboxyl groups or mixtures thereof or anhydrides or dianhydrides of the carboxyl groups are used to prepare the polyesteramide P1,(a2) from 0.1 to 5% by weight of a divinyl ether C1 and(a3) from 0 to 5 mol %, based on component (b1) from the preparation of P1 of at least one compound D having three to six hydroxyl groups or carboxyl groups or mixtures thereof or anhydrides or dianhydrides of the carboxyl groups.