Use of polyester resins for the production of articles having good properties as barries to water vapour
Use of compositions comprising polyester resins formed by specified recurring units, sequences or specified copolymers in the production of articles having excellent water barrier properties. Use of compositions comprising polyester resins formed by (i) recurring units X = [O-(CH 2) n-OCO-(CH 2) m-C...
Gespeichert in:
Hauptverfasser: | , , , , , |
---|---|
Format: | Patent |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext bestellen |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | Use of compositions comprising polyester resins formed by specified recurring units, sequences or specified copolymers in the production of articles having excellent water barrier properties. Use of compositions comprising polyester resins formed by (i) recurring units X = [O-(CH 2) n-OCO-(CH 2) m-CO] and/or Y = [O-(CH 2) k-CO]; (ii) copolymers comprising units and/or sequences of formula x i[O-(CH 2) n i-OCO-(CH 2) m i-CO] and/or y j[O-(CH 2) k j-CO]; or (iii) [Image] x i and y j are molar fractions and vary between 0-1 such that formula (iv) applies. [Image] Z = [O-(CH 2) a-OCO-(CH 2) b-C. The resins have mean numeral molecular weights of greater than 10,000. The units or sequences in (i), (ii) or (iii) allows the production of biodegradable articles having a permeability to water vapor of less than 350 g x 30 mu m/m 2> per day at 38[deg]C and 90 % relative humidity. half sum of n and m, k : at least 6; i, j : 1-5; n i2-22; m i0-20; k j1-21; a : 2-3; b : 7-11 An independent claim is also included for products produced from the polyester resins. |
---|