Propylene based terpolymers

Patent metadata

Field	Value
Publication number	US-10072109-B2
Application number	US-201414898049-A
Country	US
Kind code	B2
Filing date	May 6, 2014
Priority date	Jun 11, 2013
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

The present technology relates to container comprising a propylene, ethylene, 1-butene terpolymer wherein in the terpolymer:
i) the content of ethylene derived units ranges from 0.5 wt % to 1.8 wt %; ii) the content of 1-butene derived units ranges from 3.5 wt % to 6.5 wt %; iii) the ratio C2 wt %/C4 wt % ranges from 0.12 to 0.22; wherein C2 wt % is the weight percentage of ethylene derived units, and C4 wt % is the weight percentage of 1-butene derived units; iv) the total content of ethylene and 1-butene derived units is comprised between 4.2 wt % and 7.5 wt %; v) the melt flow rate (MFR measured according to ISO 1133, 230° C., 2.16 kg) ranges from 20 to 80 g/10 min; vi) the xylene soluble fraction at 25° C. is lower than 7.0 wt %; and vii) the melting point is higher than 140° C.

First claim

The invention claimed is:

1. An injection molded container comprising a propylene, ethylene, and 1-butene terpolymer comprising:
i) an ethylene derived content of 0.5-1.8 wt %;
ii) a 1-butene derived content of 5-6 wt %;
iii) a C 2 wt %/C 4 wt % ratio of 0.12-0.22; wherein C 2 wt % is the weight percentage of ethylene derived units and C 4 wt % is the weight percentage of 1-butene derived units;
iv) a total content of ethylene and 1-butene derived units of 5.5-7 wt %;
v) a melt flow rate (MFR, ISO 1133, 230° C., 2.16 kg) of 20-80 g/10 min;
vi) a xylene soluble fraction at 25° C. lower than 7.0 wt %;
vii) a melting point higher than 140° C.; and
viii) a haze value for a 0.4 mm thick wall of the injection molded container of lower than 3.8%.

2. The injection molded container of claim 1 , wherein the ethylene derived terpolymer content is 0.7-1.5 wt %.

3. The injection molded container of claim 1 , wherein the terpolymer melting point is 140-152° C.

4. The injection molded container of claim 1 , wherein the terpolymer has a gloss as measured on a 1 mm plaque of higher than 120%.

5. The injection molded container of claim 1 , wherein the propylene, ethylene, and 1-butene terpolymer comprises a C 2 wt %/C 4 wt % ratio of 0.14-0.20; wherein C 2 wt % is the weight percentage of ethylene derived units and C 4 wt % is the weight percentage of 1-butene derived units.

6. The injection molded container of claim 1 , wherein the propylene, ethylene, and 1-butene terpolymer comprises a C 2 wt %/C 4 wt % ratio of 0.15-0.20; wherein C 2 wt % is the weight percentage of ethylene derived units and C 4 wt % is the weight percentage of 1-butene derived units.

7. The injection molded container of claim 1 , wherein the propylene, ethylene, and 1-butene terpolymer comprises a melt flow rate (MFR, ISO 1133, 230° C., 2.16 kg) of 25-70 g/10 min.

8. The injection molded container of claim 1 , wherein the propylene, ethylene, and 1-butene terpolymer comprises a melt flow rate (MFR, ISO 1133, 230° C., 2.16 kg) of 31-52 g/10 min.

9. The injection molded container of claim 1 , wherein the propylene, ethylene, and 1-butene terpolymer comprises a xylene soluble fraction at 25° C. lower than 6.0 wt %.

10. The injection molded container of claim 1 , wherein the propylene, ethylene, and 1-butene terpolymer comprises a xylene soluble fraction at 25° C. lower than 5.5 wt %.

Assignees

• Basell Poliolefine Italia Srl

Inventors

• Destro Mara
• Ciarafoni Marco
• Massari Paola
• Caputo Tiziana
• Bohm Thomas

Classifications

• C08F210/06 Primary

  Propene · CPC title

• C08F210/02

  Ethene · CPC title

• B65D65/38

  Packaging materials of special type or form · CPC title

• C08F210/08

  Butenes · CPC title

• C08F2500/12

  Melt flow index or melt flow ratio · CPC title