Polyethylene compositions for rotational molding

Details Polyethylene compositions for rotational molding Polyethylene compositions for rotational molding

2005-11-29

2005-11-29

Rabago, Roberto (Department: 1713)

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

Synthetic resins

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

C428S035700, C428S036800, C264S310000, C264S311000, C264S312000, C264S503000

Reexamination Certificate

active

06969741

ABSTRACT:
Polyethylene blend compositions suitable for rotomolding, rotomolded articles, and processes for rotomolding articles are provided. The polyethylene compositions include a first polyethylene having a melt index of 0.4 to 3.0 g/10 min and a density of from 0.910 to 0.930 g/cm3; and a second polyethylene having a melt index of 10 to 30 g/10 min and a density of 0.945 to 0.975 g/cm3. The composition has a density of from 0.930 to 0.955 g/cm3and a melt index of 1.5 to 12 g/10 min, and the first and second polyethylenes differ in density by from 0.030 to 0.048 g/cm3. These compositions exhibit improved physical properties, such as Environmental Stress Crack Resistance and Izod Impact Strength.

REFERENCES:
patent: 4330639 (1982-05-01), Matsuura et al.
patent: 4335224 (1982-06-01), Matsuura et al.
patent: 4336352 (1982-06-01), Sakurai et al.
patent: 4429079 (1984-01-01), Shibata et al.
patent: 4438238 (1984-03-01), Fukushima et al.
patent: 4461873 (1984-07-01), Bailey et al.
patent: 4536550 (1985-08-01), Moriguchi et al.
patent: 4547551 (1985-10-01), Bailey et al.
patent: 4577768 (1986-03-01), Go, deceased et al.
patent: 4705829 (1987-11-01), Kwack et al.
patent: 4770912 (1988-09-01), Furrer et al.
patent: 4786688 (1988-11-01), Thiersault et al.
patent: 4792588 (1988-12-01), Suga et al.
patent: 4835219 (1989-05-01), Tajima et al.
patent: 5015511 (1991-05-01), Treybig et al.
patent: 5082902 (1992-01-01), Gurevitch et al.
patent: 5189106 (1993-02-01), Morimoto et al.
patent: 5260384 (1993-11-01), Morimoto et al.
patent: 5306775 (1994-04-01), Martin et al.
patent: 5319029 (1994-06-01), Martin et al.
patent: 5346732 (1994-09-01), Lai et al.
patent: 5380803 (1995-01-01), Coutant et al.
patent: 5382630 (1995-01-01), Stehling et al.
patent: 5382631 (1995-01-01), Stehling et al.
patent: 5405901 (1995-04-01), Daniell et al.
patent: 5519091 (1996-05-01), Tsutsui et al.
patent: 5530055 (1996-06-01), Needham
patent: 5589128 (1996-12-01), Lai et al.
patent: 5605969 (1997-02-01), Tsutsui et al.
patent: 6111023 (2000-08-01), Chum et al.
patent: 6136924 (2000-10-01), Promel
patent: 6162871 (2000-12-01), Watanabe et al.
patent: 6225421 (2001-05-01), Promel et al.
patent: 6362270 (2002-03-01), Chaudhary et al.
patent: 0 423 962 (1991-04-01), None
patent: 1 201 711 (2002-05-01), None
patent: 1 236 770 (2002-09-01), None
patent: 2001-89615 (2001-04-01), None
patent: 00/71615 (2000-11-01), None
patent: 01/96419 (2001-12-01), None
patent: 02/48258 (2002-06-01), None
Abstract of JP 2001089615.
Dodge, Philip T., “Rotational Molding,”Encyclopedia of Polymer Science and Engineering, vol. 14, pp. 659-670 (1988).
Elvers, Barbara, et al., “Injection Molding,”Ullman's Encyclopedia of Industrial Chemistry, vol. A20, pp. 688-66 (Canada, 1992).
Fair, R. L., “Rotational Molding,”Modern Plastics Mid-October Encylcopedia, vol. 66, No. 11, pp. 317-338, McGraw-Hill, Inc. (New York, 1989).

Affiliated with

Also associated with

Rating

Polyethylene compositions for rotational molding does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polyethylene compositions for rotational molding, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyethylene compositions for rotational molding will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3458956