Abstract:
The present invention relates to a polyester mixture comprising: i) from 95 to 99.95% by weight, based on components i and ii, of a polyester selected from the group consisting of: polybutylene terephthalate, polycyclohexylenedimethylene 2,5-furandicarboxylate, polybutylene adipate-co-terephthalate, polybutylene sebacate-co-terephthalate, polybutylene succinate-co-terephthalate, polybutylene 2,5-furandicarboxylate-co-succinate, polybutylene 2,5-furandicarboxylate-co-adipate, polybutylene 2,5-furandicarboxylate-co-azelate, polybutylene 2,5-furandicarboxylate-co-sebacate, polybutylene 2,5-furandicarboxylate-co-brassylate, polybutylene 2,5-furandicarboxylate-co-1,18-C18-dicarboxylate, polybutylene succinate, polybutylene adipate, polybutylene succinate-co-adipate, polybutylene succinate-co-sebacate, polybutylene sebacate or mixtures of 2 or more of the polyesters mentioned, and ii) from 0.05 to 5% by weight, based on components i and ii, of polyethylene 2,5-furandicarboxylate.
Abstract:
A process for the continuous production of a biodegradable polyester, wherea mixture of aliphatic dihydroxy compounds, aliphatic and aromatic dicarboxylic acids or their liquid esters, and, optionally, further comonomers is mixed, without addition of a catalyst, to give a paste, and i) this mixture with at least a portion of the catalyst, is continuously esterified or, transesterified; ii) the transesterification or, esterification product obtained in i) is continuously precondensed with any remaining amount of catalyst to an intrinsic viscosity of from 20 to 70 cm3/g; iii) the product obtainable from ii) is continuously polycondensed to an intrinsic viscosity of from 60 to 170 cm3/g, and iv) the product obtainable from iii) is reacted continuously with a chain extender in a polyaddition reaction to an intrinsic viscosity of from 150 to 320 cm3/g. The invention further relates to biodegradable polyesters obtained_by this process.
Abstract:
The invention relates to thermoplastic molding compositions comprising A) 10 to 98 wt % of a thermoplastic polyamide other than B), B) 1 to 50 wt % of a thermoplastic polyamide comprising units derived from 2-pyrrolidone, C) 0 to 40 wt % of a halogen-free flame retardant, D) 0 to 60 wt % of a fibrous or particulate filler or mixtures thereof, E) 0 to 30 wt % of further added substances, wherein the weight percentages A) to E) sum to 100%.
Abstract:
The present invention relates to specific deoxybenzoin containing flame retardant polyesters and flame retardant thermoplastic polymer molding compositions comprising deoxybenzoin containing flame retardant polyesters as well as their preparation and use for producing moldings, fibers or foils.
Abstract:
A copolymer obtained by condensation of i) 90 to 99.5 mol %, based on components i) to ii), of succinic acid; ii) 0.5 to 10 mol %, based on components i) to ii), of azelaic acid, sebacic acid and/or brassylic acid; iii) 98 to 102 mol %, based on components i) to ii), of 1,3-propanediol or 1,4 butanediol, and iv) 0.01% to 5% by weight, based on the total weight of the components i) to ii), of a chain extender and/or crosslinker selected from the group consisting of an at least trihydric alcohol or an at least tribasic carboxylic acid.
Abstract:
The present invention relates to a polyester consisting of (A) repeat units derived from an acid component, which consists of (a1) 2,5-furandicarboxylic acid, (a2) an aliphatic C4-C36 dicarboxylic acid or a mixture of a plurality of aliphatic C4-C36 dicarboxylic acids, and (a3) a sulfonate group-containing dicarboxylic acid, and of (B) repeat units derived from a di-ol/amine component, and optionally of further repeat units (C) and/or branching components (E), and of (D) repeat units derived from at least one di- or oligofunctional compound selected from the group consisting of a di- or oligoisocyanate and a di- or oligoisocyanurate. In addition, the present invention relates to the production of these polyesters and their use.
Abstract:
The invention relates to polyesters containing: A) an acid component composed of: a1) 25 to 100 mol % of 2,5-furandicarboxylic acid or its esters or mixtures thereof a2) 0 to 75 mol % of an aliphatic C4-C36-dicarboxylic acid or its esters or mixtures thereof and a3) 1 to 10 mol % of a sulfonate-containing compound, wherein the mol percentages of the components a1) to a3) sum to 100, and B) a diol component composed of: b1) 98 to 100 mol % based on the components a1) to a3) of component A of a C2- to C12-alkanediol or mixtures thereof and b2) 0 to 2 mol % based on the components a1) to a3) of a branching agent comprising at least 3 functional groups; and optionally further components. The invention further relates to the production of the polyesters and the use thereof and to aqueous dispersions and polyester mixtures comprising these polyesters.
Abstract:
The present invention relates to specific deoxybenzoin containing flame retardant polyesters and flame retardant thermoplastic polymer molding compositions comprising deoxybenzoin containing flame retardant polyesters as well as their preparation and use for producing moldings, fibers or foils.
Abstract:
The use of an aqueous polyurethane dispersion adhesive is described for producing biodisintegratable composite foils where at least two substrates are adhesive-bonded to one another with use of the polyurethane dispersion adhesive, where at least one of the substrates is a biodisintegrable polymer foil. At least 60% by weight of the polyurethane is composed of diisocyanates, polyesterdiols, and at least one bifunctional carboxylic acid selected from dihydroxycarboxylic acids and diaminocarboxylic acids.
Abstract:
A method of producing a molded article involving preparing a copolymer obtained by condensation of (i) 90 to 99.5 mol %, based on components i) to ii), of succinic acid; (ii) 0.5 to 10 mol %, based on components i) to ii), of 4 to 10 mol % sebacic acid; (iii) 98 to 102 mol %, based on components i) to ii), of 1,3-propanediol or 1,4-butanediol; (iv) 0.05 to 0.5% by weight, based on the total weight of components i) to iii), of a crosslinker; and (v) 0.35 to 2% by weight, based on the total weight of components i) to iii), of 1,6-hexamethylene diisocyanate. The copolymer is injection molded or blow molded to form a molded article having a wall thickness above 200 μm.