Highly viscous, largely amorphous polyolefin

Details Highly viscous, largely amorphous polyolefin Highly viscous, largely amorphous polyolefin

2006-03-13

2010-10-05

Choi, Ling-Siu (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C525S240000

Reexamination Certificate

active

07807768

ABSTRACT:
A polyolefin which contains the following monomer units:a) not more than 25% by weight of units which are derived from ethene,b) not more than 75% by weight of units which are derived from propene andc) from 5 to 100% by weight of units which are derived from an α-olefin having 4 to 20 carbon atoms,the polyolefin having the following parameters:d) a weight-average molecular weight in the range of from 70 000 to 10 000 000 g/mol,e) a polydispersity in the range of from 4 to 60,f) a melt viscosity, measured by oscillation rheometry at a shear rate of 1 Hz at 190° C., in the range of from 100 000 to 100 000 000 mPa·s,g) a needle penetration in the range of from 3 to 70·0.1 mm,h) an enthalpy of fusion in the range of from 2 to 100 J/g,i) a glass transition temperature Tgin the range of from −15° C. to −80° C. andj) a final melting point of the crystalline fraction in the range of from 85 to 175° C.,is compatible both with ethylene polymers and with propylene polymers and is suitable for use in sheets, sealing sheets and shaped articles.

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U.S. Appl. No. 11/911, 394, filed Oct. 12, 2007, Becker, et al.
U.S. Appl. No. 11/917,104, filed Dec. 10, 2007, Vey, et al.

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