Ethylene .alpha.-olefin block copolymers and methods for product

Details Ethylene .alpha.-olefin block copolymers and methods for product Ethylene .alpha.-olefin block copolymers and methods for product

1995-09-22

1998-03-31

Clark, W. Robinson H.

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

Synthetic resins

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

525 89, 525 95, 525 98, 525323, 525324, 526 72, 526 75, 526 78, 526 86, 526 87, 526 89, 526 90, 526335, 526336, 526339, 526348, C08L 2304, C08L 2316, C08F 420, C08F29708

Patent

active

057339805

ABSTRACT:
This invention relates to block polymers containing both crystalline and elastomeric blocks, the block copolymer having an A block and a B block. The A block is a polyethylene or an ethylene polymer optionally containing an alpha-olefin and is generally crystalline. The B block contains an ethylene, .alpha.-olefin copolymer segment and optionally contain an ethylene, .alpha.-olefin, non-conjugated diene terpolymer segment. If the B block contains a diene containing segment, the diene containing segment is furthest from the junction of the A and the B blocks. Also disclosed is a process for manufacture of the block copolymers and methods for coupling the block copolymers. Coupled block copolymers are useful as thermoplastic elastomers exhibiting physical properties approaching those of crosslinked EP or EPDM elastomers, but showing thermal processability after coupling. The block copolymers of the present invention may also be used as a lubricant or fuel additive, as a plastics blend component, in bitumen blends, as a component in hot melt adhesives and as a component of roof sheeting compounds.

REFERENCES:
patent: 3378606 (1968-04-01), Kontos
patent: 3378608 (1968-04-01), Hassell et al.
patent: 3499060 (1970-03-01), Sumki et al.
patent: 3798288 (1974-03-01), McManimie et al.
patent: 4065520 (1977-12-01), Bailey et al.
patent: 4408019 (1983-10-01), Blunt
patent: 4481336 (1984-11-01), Fujii et al.
patent: 4540753 (1985-09-01), Cozewith et al.
patent: 4716207 (1987-12-01), Cozewith et al.
patent: 4804794 (1989-02-01), Verstrate et al.
patent: 4843129 (1989-06-01), Spenadel et al.
patent: 4882406 (1989-11-01), Cozewith et al.
patent: 4900461 (1990-02-01), Verstrate et al.
patent: 4959436 (1990-09-01), Cozewith et al.
patent: 5030695 (1991-07-01), Cozewith et al.
Hawley's Condensed Chemical Dictionary, p. 936, Jan. 1993.
Palymer Technology Dictionary, Whelan; 1994, p. 282.
"The Effect of Molecular Weight and Molecular Weight Distribution on the Non-Neutonian Behavior of Ethylene-Diene Polymers", Trans. Soc. Rheol., 14, 83 (Jan. 1970); C.K. Shih Jan. 1970.

Affiliated with

Also associated with

Rating

Ethylene .alpha.-olefin block copolymers and methods for product does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ethylene .alpha.-olefin block copolymers and methods for product, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ethylene .alpha.-olefin block copolymers and methods for product will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-52879