Polybutylene terephthalate thermoforming process
AssigneeBASF SE
InventorsMaximilian Lehenmeier, Simon Kniesel, Erik Gubbels
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Abstract
The invention relates to the use of a thermoplastic polymer having a melting point below 220° C. as additive in polybutylene terephthalate molding compositions for reducing the necking upon elongation of sheets or films of the polybutylene terephthalate molding composition, preferably wherein the polybutylene terephthalate molding composition comprises a) 50 to 95 wt % of polybutylene terephthalate as component A, b) 5 to 50 wt % of the thermoplastic polymer having a melting point below 220° C., as component B, c) 0 to 45 wt % of filler as component C, d) 0 to 20 wt % of further additives as component D, wherein the total of components A to D is 100 wt %.
Claims15
(canceled)
The method according to claim 15, wherein an amount of the thermoplastic polymer having a melting point below 220° C. is 5 to 40 wt %, based on the total amount of the polybutylene terephthalate molding composition, which is 100 wt %.
The method according to claim 15, wherein the polybutylene terephthalate molding composition comprises
- a) 50 to 95 wt % of polybutylene terephthalate as component A,
- b) 5 to 50 wt % of the thermoplastic polymer having a melting point below 220° C., as component B,
- c) 0 to 45 wt % of filler as component C,
- d) 0 to 20 wt % of further additives as component D,
- wherein the total of components A to D is 100 wt %.
A method for reducing necking upon elongation of a sheet or a film molding composition in a thermoforming process comprising adding a thermoplastic polymer having a melting point below 220° C., where the thermoplastic polymer is selected from the group consisting of polyesters based on an aliphatic and aromatic dicarboxylic acid and on an aliphatic dihydroxy compound.
Dependencies are inferred from the claim text.