Abstract: The present invention relates to an aliphatic-aromatic polyester having a whiteness index according to ASTM E 313-73 of at least 25, to a process for preparation thereof and to the use of the aliphatic-aromatic polyester for production of polyester fibers (PF). The present invention further relates to the polyester fibers (PF) comprising the aliphatic-aromatic polyester.

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 producing expandable pelletized material which comprises polylactic acid which comprises the following steps: a) melting and incorporation by mixing of polylactic acid, one or more further polymers, a diepoxide or polyepoxide, and one or more additives, b) incorporation by mixing of an organic blowing agent into the polymer melt by means of a static or dynamic mixer at a temperature of at least 140° C., c) discharging through a die plate with holes, the diameter of which at the exit from the die is at most 1.5 mm, and d) pelletizing the melt comprising blowing agent directly downstream of the die plate, and under water, at a pressure in the range from 1 to 20 bar. The invention further relates to expandable pelletized material which comprises polylactic acid and which is obtainable by said process.

Abstract: The present invention relates to biodegradable copolyesters with molecular weight Mn from 10 000 to 100 000 measured by GPC, obtainable via reaction of i) from 51 to 84% by weight, based on the copolyester, of a branched polyester middle block produced from aliphatic or aliphatic and aromatic dicarboxylic acids and from aliphatic dihydroxy compounds with molecular weight Mn from 5000 to 25 000 measured by 1H NMR with from 15.9 to 48.9% by weight, based on the copolyester, of a lactide in the presence of a catalyst, and then the resultant polyester triblock with molecular weight Mn measured by 1H NMR from 5800 to 49 500 with ii) from 0.1 to 3% by weight, based on the copolyester, of a diisocyanate. The present invention further relates to a process for the production of, and to the use of, the abovementioned biodegradable copolyesters.

Abstract: The present invention relates to a process for coating paper, wherein the coating material used is a biodegradable, aliphatic-aromatic polyester having a melt volume rate (MVR) according to EN ISO 1133 (190° C., 2.16 kg weight) of from 3 to 50 cm3/10 min.

Abstract: The present invention relates to a process for coating paper, wherein the coating material used is a biodegradable, aliphatic-aromatic polyester having a melt volume rate (MVR) according to EN ISO 1133 (190° C., 2.16 kg weight) of from 3 to 50 cm3/10 min.

Abstract: The present invention relates to a process for complete anaerobic digestion of polymer mixtures of the composition: a) 25 to 95% by weight of a polyhydroxyalkanoate selected from the group consisting of poly-4-hydroxybutyrate, poly-3-hydroxybutyrate, poly(3-hydroxybutyrate-co-3-hydroxyvalerate), poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) and poly(3-hydroxybutyrate-co-4-hydroxybutyrate) and b) 5 to 75% by weight of an aliphatic polyester comprising: i) 65 to 100 mol %, based on components i to ii, of succinic acid or of a succinic acid derivative; ii) 0 to 35 mol %, based on components i to ii, of an aliphatic C5-C36-dicarboxylic acid, of a corresponding acid derivative or of a mixture; iii) 98 to 100 mol %, based on components i to ii, of a C2-C8-alkylenediol or C2-C6-oxyalkylenediol; iv) 0 to 2% by weight, based on the polymer obtainable from components i to iii, of at least one polyfunctional compound comprising at least two isocyanate, isocyanurate, oxazoline or epoxide groups or at least three alco

Abstract: The present invention relates to a process for coating paper, wherein the coating material used is a biodegradable, aliphatic-aromatic polyester having a melt volume rate (MVR) according to EN ISO 1133 (190° C., 2.16 kg weight) of from 3 to 50 cm3/10 min.

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 50 to 99.9% by weight, based on the total weight of components i to iii), of polylactic acid, ii) from 0 to 49.9% by weight, based on the total weight of components i to iii), of one or more further polymers, iii) from 0.1 to 2% by weight, based on the total weight of components i to iii), of a diepoxide or polyepoxide, and iv) from 0 to 10% by weight of one or more additives, b) incorporation by mixing of v) from 3 to 7% by weight, based on the total weight of components i to iv), of an organic blowing agent into the polymer melt by means of a static or dynamic mixer at a temperature of at least 140° C., c) discharging through a die plate with holes, the diameter of which at the exit from the die is at most 1.

Abstract: The present invention relates to biodegradable polyester foil comprising: i) 80 to 95 weight %, based on the total weight of components i to ii, of a biodegradable polyester based on aliphatic and aromatic dicarboxylic acids and on an aliphatic dihydroxy compound; ii) 5 to 20 weight %, based on the total weight of components i to ii, of polyhydroxyalkanoate; iii) 10 to 25 weight %, based on the total weight of components i to vi, of calcium carbonate; iv) 3 to 15 weight %, based on the total weight of components i to vi, of talc; v) 0 to 30 weight %, based on the total weight of components i to vi, of polylactic acid and/or starch; vi) 0 to 2 weight %, based on the total weight of components i to vi, of 2-(4,6-bisbiphenyl-4-yl-1,3,5-triazine-2-yl)-5-(2-ethyl-(n)-hexyloxy)phenol; and to uses of these polyester foils, in particular for agricultural applications, such as mulch foils.

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 present invention relates to a process for the continuous production of polymer mixtures comprising: a) from 10 to 80% by weight of a biodegradable polyester (Q) composed of aliphatic or aliphatic and aromatic dicarboxylic acids and of aliphatic dihydroxy compounds, and b) from 20 to 90% by weight of one or more polymers (T) selected from the group consisting of: polylactic acid, polycaprolactone, polypropylene carbonate, polyglycolide, aliphatic polyester, cellulose acetate, and polyhydroxyalkanoate, where i) a mixture composed of the aliphatic dihydroxy compounds, of the aliphatic and aromatic dicarboxylic acids and, if appropriate, of further comonomers (component C) is mixed, without addition of any catalyst, to give a paste or, as an alternative, the liquid esters of the dicarboxylic acids are fed into the system, as also are the dihydroxy compound and, if appropriate, further comonomers, without addition of any catalyst, and in a first stage this mixture, together with the entire amount or with a

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 present invention relates to a biodegradable polyester film comprising: i) from 75 to 100% by weight, based on the total weight of components i to ii, of a biodegradable polyester based on aliphatic and/or aromatic dicarboxylic acids and on an aliphatic dihydroxy compound; ii) from 0 to 25% by weight, based on the total weight of components i to ii, of polylactic acid; iii) from 10 to 25% by weight, based on the total weight of components i to v, of calcium carbonate; iv) from 3 to 15% by weight, based on the total weight of components i to v, of talc; v) from 0 to 1% by weight, based on the total weight of components i to v, of a copolymer which contains epoxy groups and is based on styrene, acrylic ester, and/or methacrylic ester; vi) from 0 to 2% by weight, based on the total weight of components i to v, of 2-(4,6-bisbiphenyl-4-yl-1,3,5-triazin-2-yl)-5-(2-ethyl-(n)-hexyloxy)phenol.

Abstract: The present invention relates to a process for complete anaerobic digestion of polymer mixtures of the composition: a) 25 to 95% by weight of a polyhydroxyalkanoate selected from the group consisting of poly-4-hydroxybutyrate, poly-3-hydroxybutyrate, poly(3-hydroxybutyrate-co-3-hydroxyvalerate), poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) and poly(3-hydroxybutyrate-co-4-hydroxybutyrate) and b) 5 to 75% by weight of an aliphatic polyester comprising: i) 65 to 100 mol %, based on components i to ii, of succinic acid or of a succinic acid derivative; ii) 0 to 35 mol %, based on components i to ii, of an aliphatic C5-C36-dicarboxylic acid, of a corresponding acid derivative or of a mixture; iii) 98 to 100 mol %, based on components i to ii, of a C2-C8-alkylenediol or C2-C6-oxyalkylenediol; iv) 0 to 2% by weight, based on the polymer obtainable from components i to iii, of at least one polyfunctional compound comprising at least two isocyanate, isocyanurate, oxazoline or epoxide groups or at least three alco

Abstract: The invention relates to binders for pulverulent metals, metal alloys or ceramics based on polyacetals, polyethers and polyesters, to thermoplastic compositions comprising these binders for the production of metallic or ceramic moldings, to the use thereof and to processes for production of moldings therefrom.

Abstract: The present invention relates to a process for complete anaerobic digestion of polymer mixtures comprising: a) 25 to 95% by weight of a polyhydroxyalkanoate selected from the group consisting of poly-4-hydroxybutyrates, poly-3-hydroxybutyrates, poly(3-hydroxybutyrate-co-3-hydroxyvalerates), poly(3-hydroxybutyrate-co-3-hydroxyhexanoates) and poly(3-hydroxybutyrate-co-4-hydroxybutyrates), and b) 5 to 75% by weight of an aliphatic-aromatic polyester comprising: i) 65 to 95 mol %, based on components i to ii, of one or more C5-C36-dicarboxylic acid derivatives or C5-C36-dicarboxylic acids; ii) 35 to 5 mol %, based on components i to ii, of a terephthalic acid derivative or of a terephthalic acid; iii) 98 to 100 mol %, based on components i to ii, of an C2-C8-alkylenediol or C2-C6-oxyalkylenediol; iv) 0 to 2% by weight, based on components i to iii, of at least one polyfunctional compound comprising at least two isocyanate, isocyanurate, oxazoline or epoxide groups or at least three alcohol or carboxylic acid gr

Abstract: The present invention relates to a polyester comprising repeat units based on at least one aliphatic dicarboxylic acid or an ester-forming derivative thereof (component A1), at least one aromatic dicarboxylic acid or an ester-forming derivative thereof (component A2), at least one diol (component B), optionally at least one sulfo-containing compound (component A3) and optionally at least one trifunctional crosslinking agent as component C1 and/or at least one difunctional chain extender as component C2, component A1 comprising 2-methylsuccinic acid or an ester-forming derivative thereof, to a process for preparing the inventive polyester, to the mixtures comprising the inventive polyester, to the use of the inventive polyesters or of the inventive mixtures for production of moldings, films, adhesives, foams or fibers, and to moldings, films, adhesives, foams or fibers comprising at least one inventive polyester or at least one inventive mixture.

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 50 to 99.9% by weight, based on the total weight of components i to iii), of polylactic acid, ii) from 0 to 49.9% by weight, based on the total weight of components i to iii), of one or more further polymers, iii) from 0.1 to 2% by weight, based on the total weight of components i to iii), of a diepoxide or polyepoxide, and iv) from 0 to 10% by weight of one or more additives, b) incorporation by mixing of v) from 3 to 7% by weight, based on the total weight of components i to iv), of an organic blowing agent into the polymer melt by means of a static or dynamic mixer at a temperature of at least 140° C., c) discharging through a die plate with holes, the diameter of which at the exit from the die is at most 1.

Abstract: The invention relates to binders for pulverulent metals, metal alloys or ceramics based on polyacetals, polyethers and polyesters, to thermoplastic compositions comprising these binders for the production of metallic or ceramic moldings, to the use thereof and to processes for production of moldings therefrom.