Polyester colorant concentrate
A colorant, concentrate technology, applied in the direction of one-component polyester rayon, dyeing method, adding pigment in spinning solution, etc.
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Embodiment 1
[0042] A polyester-carbon black masterbatch was prepared, but here a mixture of 30 wt. A powder mixture composed of agents. According to the invention, the proportion of copolyester added is 67% by weight of copolyester, based on the amount of lamp black used. The copolyester used is composed of 1,4-butanediol as diol component, and 55 mol % terephthalic acid, 35 mol % isophthalic acid and 10 Mole % sebacic acid formed condensation product, which can be obtained according to DE-A-15 94 216 Example 4. Subsequently, the inventive mixture was extruded and pelletized as described in the comparative example. The specific solution viscosity of the polyester-carbon black masterbatch pellet of the present invention is 563, and its polymer carrier concentration in dichloroacetic acid is 1 gram / 100 milliliters, under 25 ℃ (298K), measure at 25 ℃ (298K), melt Viscosity is 181 [Pa*s], which is measured by a plate / plate viscometer SR 200 (from Rheometrics) at 280°C=553K with a shear rat...
Embodiment 2
[0044] 28% by weight of lamp black, 60% by weight of polybutylene terephthalate (PBT) and 12% by weight of copolyesters selected from commercially available hot-melt adhesives (43% by weight of copolyester, based on The amount of carbon black pigment used) consists of a mixture having a melting point of 141 °C (414K) and a melt viscosity MV of 30 Pa*s (at 190 °C (463K) and a weight load of 2.16 kg, determined according to the test of ISO 1133), Melt viscosity factor MF=-0.66[Pa*s / degree], according to MV[Pa*s]=exp(-0.023*T+14.1), by plate / plate viscometer SR 200 (obtained from Rheometrics company) in In the temperature range of 160°C (433K) to 240°C (513K), at a shear rate of 10 seconds -1 Measured, melted in the form of a powder mixture in an extruder without addition of further additives or dispersing aids, dispersed and homogenized, the extruded monofilament strands were then cut into pellets after cooling in a water bath. The specific solution viscosity of the PBT-carbon ...
Embodiment 3
[0048] 30% by weight of lamp black, 53% by weight of a mixture of polyethylene terephthalate and polybutylene terephthalate (mixing ratio 1:1) and 17% by weight according to the invention according to the examples A powder mixture of the copolyester of 2 (57% by weight copolyester, based on the carbon black pigment content used) was melted, dispersed and homogenized in the extruder according to the procedure described above, and then extruded into monofilaments bunches and crushed into pellets after cooling. The specific solution viscosity of the thus obtained polyester-carbon black masterbatch is 790, measured at 25°C (298K) at a total polymer concentration of 1 g / 100 ml in dichloroacetic acid, and melted The bulk viscosity is 257 [Pa*s], which is measured by means of the viscometer SR 200 as described above and can be processed without problems by the side flow technique in order to achieve coloring of the polyester melt prior to spinning, while concentrating The pressure i...
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Abstract
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