THERMOPLASTIC VULCANISATE BLEND

• US 20100273945A1
• Filed: 07/07/2009
• Published: 10/28/2010
• Est. Priority Date: 02/07/2005
• Status: Active Grant

• Current Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Original Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Inventors: Leboeuf, Philippe, Decombes, Vincent, Philippoz, Jean-Michel, Cavalli, Serge, Renaud, Michel C.
• Granted Patent: US 7,989,548 B2
• Time in Patent Office: Days
• US Class Current: 525/90
• CPC Class Codes: C08K 5/0025 Crosslinking or vulcanising agents; including accelerators
• CPC Class Codes: C08K 5/14 Peroxides
• CPC Class Codes: C08L 2205/02 containing two or more polymers of the same C08L -group
• CPC Class Codes: C08L 23/0869 Acids or derivatives thereof
• CPC Class Codes: C08L 23/0876 Neutralised polymers, i.e. ionomers
• CPC Class Codes: C08L 23/0884 Epoxide containing esters
• CPC Class Codes: C08L 2312/02 with dienes
• 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 2666/18 Polyesters or polycarbonates according to C08L67/00 - C08L69/00; Derivatives thereof
• CPC Class Codes: C08L 33/04 Homopolymers or copolymers of esters C08L43/04 takes precedence
• CPC Class Codes: C08L 33/06 of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
• CPC Class Codes: C08L 67/00 Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain of polyester-amides C08L77/12; of polyester-imides C08L79/08; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 67/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds C08L67/06 takes precedence
• CPC Class Codes: C08L 67/025 containing polyether sequences

Abstract

The invention relates to a new polymer blend comprising:

• • 20 to 70 wt % of a mixture (A) of two or more polyalkylene phthalates;
  • 2 to 60 wt % of a cross-linked acrylate rubber;
  • 0.5 to 20 wt % of an ionomer; and
  • 1 to 30 wt % of a terpolymer of ethylene, butylacrylate (BA) and glycidylmethacrylate (GMA);
  • wherein the weight percentages are based on the sum of the above ingredients.

The polymer blend of the invention is particularly suitable for blow-moulding, to make parts for high-temperature, high-oil-exposure uses.

Claims

1. A process for making a polymer blend comprising compounding in a melt extruder at a temperature sufficient to melt and mix all components:

a TPV component (X) comprising (X1) from 15 to 60 weight percent of a polyalkylene terephthalate polyester polymer or copolymer continuous phase and (X2) from 40 to 85 weight percent of a rubber disperse phase wherein said rubber is poly(meth)acrylate or a mixed polymer of ethylene and methyl acrylate dynamically cross-linked with an organic peroxide free radical initiator and an organic diene co-agent; and

a thermoplastic polyester component (Y) comprising (Y1) at or about 5-25% by weight of a copolyether-ester block copolymer elastomer, (Y2) at or about 40-65% by weight of poly(butylene terephthalate), (Y3) at or about 5-20% by weight of an ionomer, and (Y4) at or about 5-30% by weight of a terpolymer of ethylene, butylacrylate and glycidylmethacrylate;

provided that;

the total of (Y1)-(Y4) is 100%; and

the total content of (Y1) and (Y2) does not exceed 70%.

2. A batch process for making a polymer blend comprising the following steps:

(1) mixing the following ingredients in a batch melt blender;

20 to 70 wt % of a mixture (A) of two or more polyalkylene phthalates;

2 to 60 wt % of a rubber comprising poly(meth)acrylate or a mixed polymer of ethylene and methyl acrylate that is capable of being dynamically cross-linked;

0.5 to 20 wt % of an ionomer;

1 to 30 wt % of a terpolymer of ethylene, butylacrylate and glycidylmethacrylate;

at a temperature sufficient to melt all the components, to make a homogeneous melt; and

(2) adding an organic diene co-agent and a free-radical initiator and continuing the mixing until the cross-linking of the rubber is essentially completed.

3. A continuous process for making a polymer blend comprising the following steps:

(1) mixing the following ingredients in a continuous melt blender;

20 to 70 wt % of a mixture (A) of two or more polyalkylene phthalates;

2 to 60 wt % of a rubber comprising poly(meth)acrylate or a mixed polymer of ethylene and methyl acrylate that is capable of being dynamically cross-linked;

0.5 to 20 wt % of an ionomer;

1 to 30 wt % of a terpolymer of ethylene, butylacrylate and glycidylmethacrylate;

an organic diene co-agent and a free-radical initiator; and

(2) heating at a temperature sufficient to melt all the components, to make a homogeneous melt and continuing the mixing until the cross-linking of the rubber is essentially completed.

4. A process for making a polymer blend comprising compounding in a melt extruder at a temperature sufficient to melt and mix all components:

25-95% of a TPV component (X) comprising (X1) from 15 to 60 weight percent of a polyalkylene terephthalate polyester polymer or copolymer continuous phase and (X2) from 40 to 85 weight percent of a rubber disperse phase wherein said rubber is poly(meth)acrylate or a mixed polymer of ethylene and methyl acrylate dynamically cross-linked with an organic peroxide free radical initiator and an organic diene co-agent; and

75 to 5% of a polyalkylene phthalate polyester different from (X1).