Abstract: The present invention relates to a process for the preparation of a spinnable composition (sC) by mixing at least one terephthalate polyester (A), at least one aliphatic-aromatic polyester (B), at least one oligomer (C) and optionally at least one additive (D). Moreover, the present invention relates to the spinnable composition (sC) obtained by this process, a process for the preparation of polyester fibers (PF) by extruding the spinnable composition (sC) through at least one spinneret, the polyester fibers (PF) obtained by this process, textile materials (T) comprising the polyester fibers (PF) a process for dying the textile materials (T), and the use of the oligomer (C) for the improvement of the rheology and/or the dyeability of a composition comprising at least one terephthalate polyester (A) and at least one aliphatic aromatic polyester (B).

Abstract: The present invention relates to a continuous process for purifying an aliphatic-aromatic polyester constructed from aliphatic dicarboxylic acids, aromatic dicarboxylic acids and aliphatic diols in a degassing apparatus, wherein the crude polyester is degassed for 3 to 30 minutes at a pressure of 0.01 to 5 mbar in the presence of 1% to 7% by weight, based on the total weight of the crude polyester, of an entraining agent.

Abstract: The present invention relates to a process for the preparation of a spinnable composition (sC) by mixing at least one terephthalate polyester (A), at least one aliphatic-aromatic polyester (B), at least one oligomer (C) and optionally at least one additive (D). Moreover, the present invention relates to the spinnable composition (sC) obtained by this process, a process for the preparation of polyester fibers (PF) by extruding the spinnable composition (sC) through at least one spinneret, the polyester fibers (PF) obtained by this process, textile materials (T) comprising the polyester fibers (PF) a process for dying the textile materials (T), and the use of the oligomer (C) for the improvement of the rheology and/or the dyeability of a composition comprising at least one terephthalate polyester (A) and at least one aliphatic aromatic polyester (B).

Abstract: The present invention relates to a process for producing a (co)polyester, wherein the (co)polyester at least partially consists of 1,4-butylene dicarboxylate units, in a degassing plant, wherein the crude (co)polyester is degassed in the presence of 0.1% to 5% by weight, based on the total weight of the input materials, of an entraining agent at a pressure between 5 to 300 mbar.

Abstract: The invention relates to a biodegradable three-layer polyester film of 8 to 20 ?m in thickness having a layer construction NB/C or preferably A/B/A, wherein the two outer layers (A) or (A, C) are composed of: Ai) 55% to 99.99% by weight based on the polyester mixture of the outer layers of a polyester selected from the group consisting of: polybutylene sebacate-co-terephthalate, polybutylene sebacate-co-adipate-co-terephthalate, polybutylene sebacate-co-succinate-co-terephthalate or mixtures thereof or a mixture of polybutylene sebacate-co-terephthalate and polybutylene adipate-co-terephthalate; Aii) 0.01% to 5% by weight based on the polyester mixture of the outer layers of at least one additive selected from the group consisting of: a wax, a plasticizer, a nucleating agent, antifogging agents, fillers and an antiblocking agent; and Aiii) 0% to 44.

Abstract: The invention relates to a process for the preparation of expandable polylactic-acid-containing pellets, comprising the steps of a) Melting and incorporation by mixing of the following components: i) from 65 to 95% by weight, based on the total weight of components i to iii, of polylactic acid, where the polylactic acid consists of: ia) from 65 to 95% by weight of polylactic acid with content of from 0.3 to 5% of D-lactic acid and ib) from 5 to 35% by weight of polylactic acid with content of from 10 to 18% of D-lactic acid; ii) from 5 to 35% by weight, based on the total weight of components i to iii, of an aliphatic polyester selected from the group consisting of polybutylene succinate, polybutylene succinate-co-adipate and polybutylene succinate-co-sebacate; iii) from 0 to 2% by weight, based on the total weight of components i to iii, of a compatibilizer; iv) from 0.

Abstract: The invention relates to a biodegradable polyester mixture comprising: i) 71 to 91 wt %, based on the total weight of components i and ii, of a polyester I constructed from: a-1) 40 to 70 wt %, based on the total weight of components a and b, of an aliphatic C9-C16 dicarboxylic acid or of a C9-C16 dicarboxylic acid derivative; b-1) 30 to 60 wt %, based on the total weight of components a and b, of terephthalic acid or of a terephthalic acid derivative; c-1) 98 to 100 wt %, based on the total weight of components a and b, of a C3-C6 diol; d-1) 0 to 2 wt %, based on the total weight of components a and b, of an at least trihydric alcohol; e-1) 0 to 2 wt %, based on the total weight of components a to e, of a chain extender, and ii) 9 to 29 wt %, based on the total weight of components i and ii, of a polyester II constructed from: a-2) 40 to 70 wt %, based on the total weight of components a and b, of an aliphatic C4-C6 dicarboxylic acid or of a C4-C6 dicarboxylic acid derivative; b-2) 30 to 60 wt %, based

Abstract: The invention relates to a process for production of expanded foam beads of one or more polyesters based on aliphatic or aliphatic and aromatic dicarboxylic acids and aliphatic diols, comprising the steps of: (a) melting the polyester and admixing the polyester with 1 to 3.5 wt %, based on the polyester, of a carbon dioxide and/or nitrogen blowing agent and also 0.1 to 2 wt % of a nucleating agent, and pressing the nucleated polyester melt, containing blowing agent, through a perforated disk controlled to a temperature between 150° C. and 185° C. and into a pelletizing chamber, (b) using a cutting device to comminute the polymer melt pressed through the perforated disk into individual expanding pellets, (c) discharging the pellets from the pelletizing chamber into a stream of water which is at a temperature of 5 to 90° C. and a pressure of 0.1 bar to 20 bar above ambient pressure.

Abstract: The invention relates to a process for the preparation of expandable polylactic-acid-containing pellets, comprising the steps of a) Melting and incorporation by mixing of the following components: i) from 65 to 95% by weight, based on the total weight of components i to iii, of polylactic acid, where the polylactic acid consists of: ia) from 65 to 95% by weight of polylactic acid with content of from 0.3 to 5% of D-lactic acid and ib) from 5 to 35% by weight of polylactic acid with content of from 10 to 18% of D-lactic acid; ii) from 5 to 35% by weight, based on the total weight of components i to iii, of an aliphatic polyester selected from the group consisting of polybutylene succinate, polybutylene succinate-co-adipate and polybutylene succinate-co-sebacate; iii) from 0 to 2% by weight, based on the total weight of components i to iii, of a compatibilizer; iv) from 0.

Abstract: The invention relates to a biodegradable polyester mixture comprising: i) 71 to 91 wt %, based on the total weight of components i and ii, of a polyester I constructed from: a-1) 40 to 70 wt %, based on the total weight of components a and b, of an aliphatic C9-C16 dicarboxylic acid or of a C9-C16 dicarboxylic acid derivative; b-1) 30 to 60 wt %, based on the total weight of components a and b, of terephthalic acid or of a terephthalic acid derivative; c-1) 98 to 100 wt %, based on the total weight of components a and b, of a C3-C6 diol; d-1) 0 to 2 wt %, based on the total weight of components a and b, of an at least trihydric alcohol; e-1) 0 to 2 wt %, based on the total weight of components a to e, of a chain extender, and ii) 9 to 29 wt %, based on the total weight of components i and ii, of a polyester II constructed from: a-2) 40 to 70 wt %, based on the total weight of components a and b, of an aliphatic C4-C6 dicarboxylic acid or of a C4-C6 dicarboxylic acid derivative; b-2) 30 to 60 wt %, based

Abstract: Disclosed is a biodegradable polyester mixture comprising 45 to 95 wt %, based on the total weight of polyester I and II, of a polyester I constructed from an aliphatic C9-C18 dicarboxylic acid or a C9-C18 dicarboxylic acid derivative; terephthalic acid or a terephthalic acid derivative; a C3-C6 diol; an at least trihydric alcohol; and a chain extender. The biodegradable polyester mixture further comprises 5 to 55 wt %, based on the total weight of polyester I and II, of a polyester II constructed from an aliphatic C4-C6 dicarboxylic acid or a C4-C6 dicarboxylic acid derivative; terephthalic acid or a terephthalic acid derivative; a C3-C6 diol; an at least trihydric alcohol; and a chain extender. The biodegradable polyester mixture further comprises 10 to 25 wt %, based on the total weight, of calcium carbonate; and 3 to 15 wt %, based on the total weight, of talc.

Abstract: Disclosed is a biodegradable polyester mixture comprising 45 to 95 wt %, based on the total weight of polyester I and II, of a polyester I constructed from an aliphatic C9-C18 dicarboxylic acid or a C9-C18 dicarboxylic acid derivative; terephthalic acid or a terephthalic acid derivative; a C3-C6 diol; an at least trihydric alcohol; and a chain extender. The biodegradable polyester mixture further comprises 5 to 55 wt %, based on the total weight of polyester I and II, of a polyester II constructed from an aliphatic C4-C6 dicarboxylic acid or a C4-C6 dicarboxylic acid derivative; terephthalic acid or a terephthalic acid derivative; a C3-C6 diol; an at least trihydric alcohol; and a chain extender. The biodegradable polyester mixture further comprises 10 to 25 wt %, based on the total weight, of calcium carbonate; and 3 to 15 wt %, based on the total weight, of talc.

Abstract: The invention relates to a process for producing expandable pelletized material which comprises polylactic acid which comprises the following steps: a) melting and incorporation by mixing of the following components: i) from 61.9 to 98.9% by weight, based on the total weight of components i to iv, of polylactic acid, ii) from 1 to 38% by weight, based on the total weight of components i to iv, of at least one polyhydroxyalkanoate, iii) from 0 to 30% by weight, based on the total weight of components i to iv, of at least one polyester based on aliphatic and/or aromatic dicarboxylic acids and on aliphatic dihydroxy compounds; iv) from 0.

Abstract: The present invention relates to foam layers based on a biodegradable polyester mixture PM, comprising: i) from 5 to 49% by weight, based on the total weight of components i to ii, of at least one polypropylene carbonate; ii) from 51 to 95% by weight, based on the total weight of components i to ii, of polylactic acid; iii) from 0 to 25% by weight, based on the total weight of components i to v, of a polyester composed of an (x1) aliphatic and/or (x2) aromatic dicarboxylic acid and of an (y) aliphatic diol; iv) from 0 to 5% by weight, based on the total weight of components i to v, of a copolymer which comprises epoxy groups and which is based on styrene, acrylate, and/or methacrylate; and v) from 0 to 15% by weight, based on the total weight of components i to v, of additives.