Polymer compositions and method of making pipes

Details Polymer compositions and method of making pipes Polymer compositions and method of making pipes

2011-08-02

2011-08-02

Nutter, Nathan M (Department: 1765)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S240000

Reexamination Certificate

active

07989549

ABSTRACT:
A polymer composition comprises a low-molecular-weight (LMW) ethylene polymer component and a high-molecular-weight (HMW) ethylene polymer component. Preferably, the LMW polyethylene component and the HMW polyethylene component co-crystallize in the composition such that it exhibits a single or substantially single peak in a lamella thickness distribution (“LTD”) curve. The ethylene polymer for the LMW and the HMW polyethylene components can be either homopolyethylene or ethylene copolymer. Preferably, both components are an ethylene copolymer of the same or different composition (i.e., with the same or different comonomers). A method of making a pipe that includes selecting a polymer composition having a substantially single peak in the LTD curve is described.

REFERENCES:
patent: 3984610 (1976-10-01), Elston
patent: 4461873 (1984-07-01), Bailey et al.
patent: 4500648 (1985-02-01), Malpass
patent: 4530914 (1985-07-01), Ewen et al.
patent: 4752597 (1988-06-01), Turner
patent: 4851489 (1989-07-01), Malpass
patent: 4935474 (1990-06-01), Ewen et al.
patent: 4937299 (1990-06-01), Ewen et al.
patent: 5047485 (1991-09-01), DeNicola, Jr.
patent: 5055438 (1991-10-01), Canich
patent: 5057475 (1991-10-01), Canich et al.
patent: 5064802 (1991-11-01), Stevens et al.
patent: 5096867 (1992-03-01), Canich
patent: 5132380 (1992-07-01), Stevens et al.
patent: 5272236 (1993-12-01), Lai et al.
patent: 5324800 (1994-06-01), Welbom, Jr. et al.
patent: 5380803 (1995-01-01), Coutant et al.
patent: 5470811 (1995-11-01), Jejelowo et al.
patent: 5530072 (1996-06-01), Shirodkar
patent: 5556928 (1996-09-01), Devore et al.
patent: 5665800 (1997-09-01), Lai et al.
patent: 5685128 (1997-11-01), Chum et al.
patent: 5703180 (1997-12-01), Tsutsui et al.
patent: 5703187 (1997-12-01), Timmers
patent: 5783638 (1998-07-01), Lai et al.
patent: 5852152 (1998-12-01), Walton et al.
patent: 5965756 (1999-10-01), McAdon et al.
patent: 6001941 (1999-12-01), Tsutsui et al.
patent: 6015868 (2000-01-01), Nicklas et al.
patent: 6034021 (2000-03-01), Wilson et al.
patent: 6107147 (2000-08-01), Kim et al.
patent: 6114457 (2000-09-01), Markel et al.
patent: 6114486 (2000-09-01), Rowland et al.
patent: 6143854 (2000-11-01), Bamberger et al.
patent: 6147180 (2000-11-01), Markel et al.
patent: 6197910 (2001-03-01), Weng et al.
patent: 6207606 (2001-03-01), Lue et al.
patent: 6277931 (2001-08-01), Jaber et al.
patent: 6346575 (2002-02-01), Debras et al.
patent: 6369176 (2002-04-01), Laughner et al.
patent: 6462135 (2002-10-01), Rohde et al.
patent: 6545093 (2003-04-01), de Lange et al.
patent: 6787608 (2004-09-01), VanDun et al.
patent: 2001/0039320 (2001-11-01), Jacobsen et al.
patent: 0 321 964 (1989-06-01), None
patent: 0 773 257 (1997-05-01), None
patent: 0 778 289 (1997-06-01), None
patent: 1 057 834 (2000-12-01), None
patent: WO-96/07478 (1996-03-01), None
patent: WO 97/48735 (1997-12-01), None
patent: WO-00/49059 (2000-08-01), None
patent: WO-00/50488 (2000-08-01), None
patent: WO-01/14434 (2001-03-01), None
patent: WO-01-42315 (2001-06-01), None
patent: WO-01/92403 (2001-12-01), None
patent: WO-03/016396 (2003-02-01), None
F. Chen, et al.,Crystallisation of single-site polyethylene blends investigated by thermal fractionation techniques, Polymer 42, 2001, pp. 4579-4587, Australia.
Satoru Hosoda, et al.Degree of comonomer Inclusion into lamella crystal for propylene/olefin copolymers, Polymer 43, 2002, pp. 7451-7460, Australia.

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