METHOD OF MANUFACTURE OF POLYESTER MOLDING COMPOSITIONS AND ARTICLES PRODUCED THEREFROM

• US 20040220335A1
• Filed: 06/24/2004
• Published: 11/04/2004
• Est. Priority Date: 12/04/2001
• Status: Active Grant

• Current Assignee: SABIC Global Technologies BV (Government of Saudi Arabia)
• Original Assignee: General Electric Company
• Inventors: de Wit, Gerrit, Damman, Sebastiaan Bernardus
• Granted Patent: US 7,253,230 B2
• Time in Patent Office: Days
• US Class Current: 525/66
• CPC Class Codes: C08K 3/013 Fillers, pigments or reinforcing additives
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 51/04 grafted on to rubbers
• CPC Class Codes: C08L 67/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds C08L67/06 takes precedence
• CPC Class Codes: C08L 79/08 Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors

Abstract

A thermoplastic molding composition comprises a resin composition having 50 to about 90 weight percent of a polyester, about 8 to about 48 weight percent of a polyetherimide, about 2 to about 25 weight percent of a high rubber graft impact modifier, each based on the total resin composition, and up to about 15 weight percent of a particulate filler. A making the composition comprises pre-melt compounding a polyester, a polyetherimide, and a high rubber graft impact modifier to form a pre-compounded blend, wherein the pre-compounded blend has a Tg of greater than or equal to about 110° C.; and dry-blending a crystallized polyester with the pre-compounded blend to form the molding composition. Such molding compositions are particularly useful in blow-molding containers for liquids such as beer.

Claims

1. A thermoplastic molding composition comprising to about 90 wt. % of a polyester;

about 8 to about 48 wt. % of a polyetherimide; and

about 2 to about 25 wt. % of a high rubber graft impact modifier comprising at least about 40 wt. % rubber, the amount of the polyester, polyetherimide, and impact modifier being based on their total combined weight.

2. The composition of claim 1, wherein the polyester has repeating units of the following general formula (I):

3. The composition of claim 2, wherein R1 is ethylene or butylene and R² is a divalent isophthalyl or terephthalyl radical.

4. The composition of claim 1, wherein the polyester comprises polyethylene terephthalate.

5. The composition of claim 1, wherein the polyetherimide comprises structural units of the formula (II):

6. The composition of claim 1, wherein the polyetherimide is prepared by reaction of 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride, 4,4′

-bis(3,4-dicarboxyphenoxy)diphenyl ether dianhydride, 4,4′

-bis(3,4-dicarboxyphenoxy)diphenyl sulfide dianhydride, 4,4′

-bis(3,4-dicarboxyphenoxy)benzophenone dianhydride, 4,4′

-bis(3,4-dicarboxyphenoxy)diphenyl sulfone dianhydride, 2,2-bis[4-(2,3-dicarboxyphenoxy)phenyl]propane dianhydride, 4,4′

-bis(2,3-dicarboxyphenoxy)diphenyl ether dianhydride, 4,4′

-bis(2,3-dicarboxyphenoxy)diphenyl sulfide dianhydride, 4,4′

-bis(2,3-dicarboxyphenoxy)benzophenone dianhydride, 4,4′

-bis(2,3-dicarboxyphenoxy)diphenyl sulfone dianhydride, 4-(2,3-dicarboxyphenoxy)-4′

-(3,4-dicarboxyphenoxy)diphenyl-2,2-propanedianhydride, 4-(2,3-dicarboxyphenoxy)-4′

-(3,4-dicarboxyphenoxy)diphenyl ether dianhydride, 4-(2,3-dicarboxyphenoxy)-4′

-(3,4-dicarboxyphenoxy)diphenyl sulfide dianhydride, 4-(2,3-dicarboxyphenoxy)-4′

-(3,4-dicarboxyphenoxy)benzophenone dianhydride, 4-(2,3-dicarboxyphenoxy)-4′

-(3,4-dicarboxyphenoxy)diphenyl sulfone dianhydride, or mixtures comprising at least one of the foregoing, with ethylenediamine, propylenediamine, trimethylenediamine, diethylenetriamine, triethylenetetramine, hexamethylenediamine, heptamethylenediamine, octamethylenediamine, non-amethylenediamine, decamethylenediamine, 1,12-dodecanediamine, 1,18-octadecanediamine, 3-methyl heptamethylenediamine, 4,4-dimethylheptamethylenediamine, 4-methylnonamethylenediamine, 5-methylnonamethylenediamine, 2,5-dimethylhexamethylenediamine, 2,5-dimethylheptamethylenediamine, 2,2-dimethylpropylenediamine, N-methyl-bis (3-aminopropyl) amine, 3-methoxyhexamethylenediamine, 1,2-bis(3-aminopropoxy) ethane, bis(3-aminopropyl) sulfide, 1,4-cyclohexanediamine, bis-(4-aminocyclohexyl) methane, m-phenylenediamine, p-phenylenediamine, 2,4-diaminotoluene, 2,6-diaminotoluene, m-xylylenediamine, p-xylylenediamine, 2-methyl-4,6-diethyl-1,3-phenylenediamine, 5-methyl-4,6-diethyl-1,3-phenylene-diamine, benzidine, 3,3′

-dimethylbenzidine, 3,3′

-dimethoxybenzidine, 1,5-diaminonaphthalene, bis(4-aminophenyl) methane, bis(2-chloro-4-amino-3,5-diethylphenyl) methane, bis(4-aminophenyl) propane, 2,4-bis(b-amino-t-butyl) toluene, bis(p-b-amino-t-butylphenyl) ether, bis(p-b-methyl-o-aminophenyl) benzene, bis(p-b-methyl-o-aminopentyl) benzene, 1, 3-diamino-4-isopropylbenzene, bis(4-aminophenyl) sulfide, bis (4-aminophenyl) sulfone, bis(4-aminophenyl) ether, 1,3-bis(3-aminopropyl) tetramethyldisiloxane, or mixtures comprising at least one of the foregoing.

7. The composition of claim 5, wherein the polyetherimide resin comprises structural units according to formula (II) wherein each R is independently p-phenylene or m-phenylene or a combination of at least one of the foregoing and Z is a divalent radical of the formula (X).

8. The composition of claim 1, wherein the impact modifier is a core-shell impact modifier.

9. The composition of claim 1, wherein the impact modifier is an acrylonitrile butadiene styrene or a methacrylate butadiene styrene.

10. The composition of claim 9, wherein the impact modifier comprises about 2 to about 10 wt. % of the composition.

11. The composition of claim 1, further comprising up to about 15 wt. % of an inorganic filler, based on the total weight of the composition.

12. The composition of claim 11, wherein the inorganic filler is selected from the group consisting of alumina, amorphous silica, anhydrous aluminum silicates, mica, feldspar, clays, talc, glass flake, glass fibers, glass microspheres, wollastonite, metal oxides, zinc oxide, barium sulfate, and fiberglass as well as mixtures comprising at least one of the foregoin