Don J Germano

US Patent:

54243629, Jun 13, 1995

Filed:

Apr 28, 1993

Appl. No.:

8/054384

Inventors:

Thomas J. McKeand - Clute TX
Stephen R. Betso - Lake Jackson TX
H. Craig Silvis - Midland MI
Deepak R. Parikh - Lake Jackson TX
Don J. Germano - Lake Jackson TX

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C08L 5106

US Classification:

525 71

Abstract:

Paintable thermoplastic polyolefin compositions are disclosed which comprise (i) 30 to about 70 wt % of at least one polypropylene or graft-modified polypropylene, (ii) 0 to about 40 wt % of at least one nongrafted or graft-modified substantially linear ethylene polymer, and (iii) 0 to about 50 wt % of an interpolymer of ethylene and an. alpha. ,. beta. -unsaturated carbonyl copolymer, e. g. a copolymer of ethylene and acrylic acid. The polypropylene and substantially linear ethylene polymer are grafted with an unsaturated organic compound containing at least on ethylenic unsaturation and at least one carbonyl group, e. g. maleic anhydride. The compositions exhibit excellent paintability with conventional paints without prior application of a primer or surface treatment, good heat resistance, and good low temperature impact resistance and they can be recycled by melt blending the compositions with thermoplastic materials, e. g. , in an extruder.

US Patent:

58831886, Mar 16, 1999

Filed:

Sep 10, 1997

Appl. No.:

8/926760

Inventors:

Yuh-Chin Hwang - Taipei, TW
Stephen R. Betso - Horgen, CH
Thomas J. McKeand - Freeport TX
H. Craig Silvis - Midland MI
Deepak R. Parikh - Lake Jackson TX
Don J. Germano - Lake Jackson TX
Seema V. Karande - Lake Jackson TX

Assignee:

The Dow Chemical Company - Midland MI
Dow Europe S.A. - Horgen

International Classification:

C08L 5100

US Classification:

525 71

Abstract:

Paintable thermoplastic polyolefin compositions are disclosed which comprise (i) about 20 to about 70 wt % of at least one graft-modified polypropylene, (ii) about 10 to about 40 wt % of at least one nongrafted or graft-modified homogeneously branched linear ethylene polymer, ethylene-propylene monomer rubber, ethylene-propylene-diene monomer rubber, heterogeneously branched linear ethylene polymer, styrene block copolymer, or a combination thereof and (iii) about 5 to about 50 wt % of an interpolymer of ethylene and an. alpha. ,. beta. -unsaturated carbonyl copolymer, e. g. a copolymer of ethylene and acrylic acid. The polypropylene and, optionally the homogeneously branched linear ethylene polymer, ethylene-propylene monomer rubber, ethylene-propylene-diene monomer rubber, heterogeneously branched linear ethylene polymer, and styrene block copolymer are grafted with an unsaturated organic compound containing at least one site of ethylenic unsaturation and at least one carbonyl group, e. g. maleic anhydride. The compositions exhibit excellent paintability with conventional paints without prior application of a primer or surface treatment, good heat resistance, good low temperature impact resistance, and they can be recycled by melt blending the compositions with thermoplastic materials, e. g.