Impact resistant blends of thermoplastic polyamides, polyolefins and elastomers

• US 5,006,601 A
• Filed: 07/20/1990
• Issued: 04/09/1991
• Est. Priority Date: 09/25/1986
• Status: Expired due to Term

• Current Assignee: Shell Oil Company (Shell Plc)
• Original Assignee: Shell Oil Company (Shell Plc)
• Inventors: Lutz, Robert G., Gelles, Richard, Gergen, William P.
• Primary Examiner(s): WOODWARD, ANA LUCRECIA
• Application Number:
  US07/554,956
• Time in Patent Office: 263 Days
• Field of Search: 525/92, 525/179, 525/66
• US Class Current: 525/66
• CPC Class Codes: C08L 2205/03 containing three or more polymers in a blend
• CPC Class Codes: C08L 2205/035 containing four or more polymers in a blend
• CPC Class Codes: C08L 23/10 Homopolymers or copolymers of propene
• CPC Class Codes: C08L 23/12 Polypropene
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 2666/06 Homopolymers or copolymers of unsaturated hydrocarbons; Derivatives thereof
• CPC Class Codes: C08L 2666/14 Macromolecular compounds according to C08L59/00 - C08L87/00; Derivatives thereof
• CPC Class Codes: C08L 2666/20 Macromolecular compounds having nitrogen in the main chain according to C08L75/00 - C08L79/00; Derivatives thereof
• CPC Class Codes: C08L 2666/24 Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
• CPC Class Codes: C08L 51/00 Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds for ABS polymers C08L55/02; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 51/006 grafted on to block copolymers containing at least one sequence of polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: C08L 51/06 grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
• CPC Class Codes: C08L 53/02 of vinyl-aromatic monomers and conjugated dienes
• CPC Class Codes: C08L 53/025 modified
• CPC Class Codes: C08L 77/00 Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08; Compositions of derivatives of such polymers

Abstract

The present invention relates to an impact resistant polymeric composition, useful as a structural material, comprising a polyamide such as a nylon 6,6, a polyolefin such as polypropylene, and a functionalized elastomer such as a maleated-EPDM.

Claims

1. Impact resistant polymeric compositions comprising:

(a) from 1 to 59 percent by weight of a polyamide having a number average molecular weight of at least 5000; and

(b) from 1 to 95 percent by weight of an isotactic propylene homopolymer;

(c) from 1 to 50 percent by weight of an elstomeric olefin copolymer to which has been grafted an acid compound or its derivative selected from the group consisting of carboxylic acids and their derivatives.

2. The composition of claim 1 wherein the elastomer is EPDM.

3. The composition of claim 1 wherein the acid compound is maleic acid.

4. The composition of claim 1 wherein the acid compound is carboxylic acid.

5. The composition of claim 1 wherein the polyamide is present at between about 20 and 59 percent by weight.

6. The composition of claim 1 wherein the polyamide is present at between about 30 and 59 percent by weight.

7. The composition of claim 1 wherein the polyamide is nylon 6,6.

8. The composition of claim 1 wherein the polyamide resin is selected from the group consisting of polyhexamethylene adipamide, polyhexamethylene sebacamide, polycaprolactam, polyhexamethylene isophthalamide, polyhexamethylene tere-co-isophthalamide and mixtures and copolymers of the above.

9. The composition of claim 1 wherein the elastomer is present at between 5 and 35 percent by weight.

10. The composition of claim 1 wherein the elastomer is present at between about 5 and 25 percent by weight.

11. The composition of claim 1 wherein the isotactic propylene homopolymer is present between about 10 and 80 percent by weight.

12. The composition of claim 1 wherein the isotactic propylene homopolymer is present between about 20 and 70 percent by weight.