Composition For Polymeric Chain Extension

Abstract

The present invention relates to a composition comprising at least one compound of the formula (1)

##STR00001##

wherein
R.sup.1, R.sup.2 and R.sup.3 are the same or different and denote a C.sub.1-C.sub.10-alkyl, and at least one carrier resin.

Claims

1. A composition comprising at least one compound of the formula (1) ##STR00004## wherein R.sup.1, R.sup.2 and R.sup.3 are the same or different and are a C.sub.1-C.sub.10-alykl, and at least one carrier resin.

2. The composition as claimed in claim 1, wherein R.sup.1, R.sup.2 and R.sup.3 are the same or different and are a C.sub.1-C.sub.2-alkyl.

3. The composition as claimed in claim 1, wherein R.sup.1, R.sup.2 and R.sup.3 are methyl.

4. The composition as claimed in claim 1, wherein the carrier resin is selected from the group consisting of polyethylene, polyethylene-norbonene copolymers, polypropylene, polybutylene, polymethyl pentene, polyethylene-vinyl acetate copolymers, polycarbonate, polystyrene, polystyrene block copolymers, polybutadien, polyisopren, polyethylene-butylen, polyacrylates, polyvinyl chloride, chlorinated polyethylene, polyvinylidene chloride, polyethylene-acrylate copolymers, acrylnitril-butadiene-styrene-copolymers, and mixtures thereof.

5. The composition as claimed in claim 1, wherein the carrier resin is acrylnitril-butadiene-styrene-copolymer, polystyrene or polycarbonate.

6. The composition as claimed in claim 3, wherein the carrier resin is polyethylene terephthalate, polybutylene terephthalate, polyethylene terephthalate glycol, maleic anhydride grafted polyethylene, or a mixture thereof.

7. The composition as claimed in claim 1, wherein the compound of formula (1) is present in an amount of between 0.01 to 99.9 wt.-%, relative to the total weight of the concentrate composition.

8. The composition as claimed in claim 1, wherein the compound of formula (1) is present in an amount of between 5.0 and 50.0 wt.-%, relative to the total weight of the concentrate composition.

9. A method for preparing a composition as claimed in claim 1, comprising the step of combining, by dispersive or distributive mixing, the compound of formula (1) and the carrier resin.

10. A chain extender for step-growth polycondensates comprising a composition as claimed in claim 1.

11. The chain extender as claimed in claim 10, wherein the polycondensates are polyamides, polyesters, polycarbonates, polyurethanes, polystyrene co-maleic anhydride or polyethylene co-acrylic acid.

12. The chain extender as claimed in claim 10, wherein the compound of formula (1) is present in an amount of from 0.1 to 50 wt.-%, relative to the total weight of the composition and the polycondensate.

13. The chain extender as claimed in claim 10, wherein the polycondensates are manufactured into polymeric articles.

14. The chain extender as claimed in claim 13, wherein the polymeric articles are sheets, films, containers or fibers.

Description

EXAMPLES

Example 1

[0037] Six formulations A-F were extruded in accordance with normal industry procedure using a Leistritz MASS technology (27 mm/40D). Therefor a masterbatch containing 10% of the chain extender in polycarbonate as carrier system was extruded. This masterbatch was incorporated in PET (amounts indicated in Table 1) by extrusion at temperatures between 200 and 300° C. with an average residence time of 35 to 40 s. The intrinsic viscosity (I.V.) was determined relative to neat PET.

TABLE-US-00001 TABLE 1 Concentration Concentration of TMTM Increase of I.V. of PET chain extender in final relative to neat PET Sample [%] product [%] [%] A 100 0 0 B 99.9 0.1 12 C 99.85 0.15 16 D 99.8 0.2 21 E 99.775 0.225 21 F 99.7 0.3 27

[0038] The used PET was RAMAPET® R 180 GR BB (Indorama Plastics, 192 000 g/mol).

Example 2

[0039] Nine formulations A-I were extruded in accordance with normal industry procedure using a Leistritz MASS technology (27 mm/40D). Therefor a masterbatch containing 10% of the chain extender in polycarbonate as carrier system was prepared. This masterbatch was incorporated in PET (amounts indicated in Table 2) by extrusion at temperatures between 200 and 300° C. In this trial the residence times of material within the extruder was varied.

TABLE-US-00002 TABLE 2 Concentration of Increase of Concentration chain extender in I.V. relative of PET finished product Residence to neat PET Sample [%] [wt.-%] time [s] [%] A 100 0 35 0 B 100 0 50 0 C 100 0 64 0 D 99.9 0.1 35 16 E 99.9 0.1 50 14 F 99.9 0.1 64 10 G 99.7 0.3 35 25 H 99.7 0.3 50 18 I 99.7 0.3 64 10

[0040] The used PET was RAMAPET® R 180 GR BB and the chain extender was TMTM.

[0041] It is demonstrated that the chain extender works best at shorter residence time with high concentrations in process.

Example 3

[0042] Four formulations A-D were extruded in accordance with normal industry procedure using a Leistritz MASS technology (27 mm/40D). Therefor a masterbatch containing 10% of the chain extender on different carrier systems was prepared. This masterbatch was incorporated in PET by extrusion at temperatures between 200 and 300° C.

TABLE-US-00003 TABLE 3 Concentration of Increase of Concentration chain extender in I.V. relative of PET finished product to neat PET Sample [%] [%] Carrier resin [%] A 100 0 — 0 B 99.9 0.1 PC 12 C 99.85 0.15 PC 16 D 99.9 0.1 MAH-g PE 4

[0043] The used PET was RAMAPET® R 180 GR BB and the chain extender was TMTM.