.alpha.-monoolefinic graft copolymers

• US 5,342,886 A
• Filed: 12/11/1991
• Issued: 08/30/1994
• Est. Priority Date: 03/24/1988
• Status: Expired due to Term

• Current Assignee: Atochem, Co.
• Original Assignee: Atochem, Co.
• Inventors: Abadie, Patrick, Parsy, Roland, Glotin, Michel
• Primary Examiner(s): WOODWARD, ANA LUCRECIA
• Application Number:
  US07/806,773
• Time in Patent Office: 993 Days
• Field of Search: 525/66, 525/179
• US Class Current: 525/66
• CPC Class Codes: C08G 81/028 containing polyamide sequences
• CPC Class Codes: C08L 2205/03 containing three or more polymers in a blend
• CPC Class Codes: C08L 23/02 not modified by chemical after-treatment
• CPC Class Codes: C08L 23/0853 Vinylacetate
• CPC Class Codes: C08L 23/10 Homopolymers or copolymers of propene
• CPC Class Codes: C08L 25/18 Homopolymers or copolymers of aromatic monomers containing elements other than carbon and hydrogen
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• 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 29/04 Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
• 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 51/06 grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
• 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

Novel graft copolymers, well adopted for compatibilizing at least two normally incompatible thermoplastic polymers, include the copolymerizates of at least one monoamino-substituted polyamide oligomer and an α-monoolefin polymer or copolymer having grafted thereon a monomer which is reactive with the amine functional group of the monoamino-substituted polyamide oligomer.

Claims

1. A polymer alloy comprising a polyamide, a polyolefin incompatible with the polyamide and a compatibilizing amount of a graft copolymer having the formula A_a M_b X_c P_d in which:

A_a M_b is the (co)polymer backbone;

X_c P_d denotes the polymers grafted on the (co)polymer backbone;

A is a recurring unit of an α

-monoolefin containing from 2 to 8 carbon atoms;

M is selected from among;

(i) recurring units of an α

-monoolefin containing from 2 to 8 carbon atoms;

or

(ii) recurring units of a plurality of α

-monoolefins as defined above;

X is a recurring unit of a monomer which can be grafted by a free-radical mechanism onto an α

-monoolefin homo- or copolymer and containing a functional group which is reactive with an amino-substituted recurring unit;

P is derived from a polyamide oligomer of the formula;

##STR7## in which f is a number ranging from 3 to 11;

g is a number ranging from 5 to 80;

R⁵ is hydrogen or a linear or branched chain alkyl radical containing up to 20 carbon atoms; and

R⁶ is a linear or branched chain alkyl or alkenyl group containing up to 20 carbon atoms, a saturated or unsaturated cycloaliphatic radical, an aromatic radical, or combination thereof;

a is a number ranging from 0 to 5,000;

b is a number from 0 to 45,000 and the sum a+b ranges from 350 to 45,000;

c is a number such that the ratio by weight of the monomer X grafted on the (co)polymer backbone to the copolymer grafted with X ranges from 500 ppm to 10%; and

d is a number other than zero or less than or equal to C.

2. The polymer alloy as defined by claim 1, said at least two incompatible polymers comprising an aliphatic (co)polyamide/(co)polymer of propylene, ethylene or both propylene and ethylene;

semiaromatic (co)polyamide/(co)polymer of propylene, ethylene or both propylene and ethylene;

or block polyetheramide/(co)polymer of propylene, ethylene or both propylene and ethylene.

3. The polymer alloy as defined by claim 1, said at least two incompatible polymers comprising polyamide 6/polypropylene;

polyamide 6/polyethylene;

polyamide 6/ethylene/propylene copolymer;

polyamide 11 or 12/polypropylene or polyethylene or ethylene/propylene copolymer;

block polyetheramide/polypropylene or polyethylene or ethylene/propylene copolymer;

or semiaromatic polyamide/polypropylene or polyethylene or ethylene/propylene copolymer.

4. The polymer alloy as defined by claim 1, comprising from 0.1 to 30% by weight of said graft copolymer.