THERMOPLASTIC ARTICLES AND PROCESSES FOR MAKING THE SAME USING AN IMPROVED MASTERBATCH

• US 20100216931A1
• Filed: 04/09/2010
• Published: 08/26/2010
• Est. Priority Date: 06/29/2006
• Status: Active Grant

• Current Assignee: Dow Global Technologies LLC (Dow, Inc.)
• Original Assignee: Dow Global Technologies, Inc. (Dow, Inc.)
• Inventors: Krabbenborg, Franciscus J.T., Houg, Jacobus, Ballot, Michael, Wevers, Ronald
• Granted Patent: US 7,858,688 B2
• Time in Patent Office: Days
• US Class Current: 524/451
• CPC Class Codes: C08J 2323/10 Homopolymers or copolymers of propene
• CPC Class Codes: C08J 2423/00 Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
• CPC Class Codes: C08J 3/226 using a polymer as a carrier
• CPC Class Codes: C08L 23/0815 Copolymers of ethene with aliphatic 1-olefins
• CPC Class Codes: C08L 23/10 Homopolymers or copolymers of propene
• CPC Class Codes: C08L 2666/06 Homopolymers or copolymers of unsaturated hydrocarbons; Derivatives thereof

Abstract

The present invention is directed to improved processes for making plastic articles, and articles made therefrom. In a broad aspect, the invention is directed to improved processes and articles made therefrom, that include the steps of providing as separate materials a first material that includes a polyolefin, a second material including an admixture of from about 45 to 85 wt. % of the total admixture of at least one particulated mineral filler; and from about 15 to 55 wt. % of the total admixture of at least a second polyolefin having a melt index greater than about 150 g/10 min at 190° C./2.16 kg, as measured per ISO 1133 (condition D); applying a shear force to form a molten blend; shaping the molten blend and solidifying the molten blend.

Claims

1-19. -19. (canceled)

20. :

A kit for use in an injection molding process, wherein the kit includes in separate packages;

(i) a first polyolefin;

(ii) at least one particulated mineral filler; and

(iii) a second polyolefin having a melt index greater than about 150 g/10 min at 190°

C./2.16 kg, as measured per ISO 1133 (condition D).

21. :

A kit for use in a process for making a shaped article, wherein the kit includes in separate packages;

(a) a first material including a first polyolefin; and

(b) a second material including an admixture including

(i) from about 45 to 85 weight percent of at least one particulated mineral filler, based on the total weight of the admixture, and

(ii) from about 15 to about 55 weight percent of a second polyolefin, wherein the second polyolefin comprises a polyolefin plastomer that includes a thermoplastic having a primary monomer of ethylene, a comonomer selected from the group consisting of 1-butene, 1-hexene, and 1-octene, and is characterized by a melt index greater than 150 g/10 min at 190°

C./2.16 kg, as measured per ISO 1133 condition D.

22. :

The kit of claim 21, wherein the first polyolefin of the first material comprises a thermoplastic polyolefin, the first material and second materials are pellets, the polyolefin plastomer includes a polymer made with a metallocene catalyst; and

the second material further comprises a propylene-ethylene copolymer characterized by

i) a melt index greater than 10 g/10 min at 230°

C./2.16 kg as measured per ISO 1133, and

ii) a flexural modulus of less than 100 MPa, as measured per ASTM D-790A.

23. :

The kit of claim 22, wherein the propylene-ethylene copolymer is characterized by;

i) from 6% by weight to 25% by weight ethylene-derived units, and from 75% by weight to 94% by weight propylene-derived units, the percentages by weight based on the total weight of propylene- and ethylene-derived units, and

ii) a melting point ranging from 35°

C. to 110°

C.

24. :

The kit of claim 21, wherein the thermoplastic polyolefin of the first material includes a polypropylene impact copolymer characterized by a melt flow rate of less than 70 g/10 min as measured according to ISO 1133 condition M at 230°

C./2.16 kg, containing greater than 8 weight percent of ethylene, and having greater than 40 weight percent crystallinity.

25. :

The kit of claim 21, wherein the kit further comprises includes at least one additive selected from a heat stabilizer, a UV stabilizer, a mold release agent, a nucleator, a lubricant, a slip agent, a colorant or any combination thereof.

26. :

The kit of claim 21, wherein the second polyolefin includes an ethylene-octene copolymer.

27. :

The kit of claim 21, wherein the particulated mineral filler includes talc.

28. :

The kit of claim 21, wherein particles of the second material are coated or partially coated with a mineral filler or a micronized polymer.

29. :

The kit of claim 21, wherein the kit is used in a process for making a shaped article, comprising the steps of;

a) providing as separate materials the first material and the second material;

b) applying a shear force to the first and second materials, while the materials are at an elevated temperature for blending the materials to form a molten blend;

c) shaping the molten blend; and

d) solidifying the molten blend;

wherein

the step of applying a shear force occurs while the first and second materials advance along a screw within a screw and barrel assembly, and

the process is substantially free of a step of compounding together the first and second materials prior to introducing the first and second materials to the screw and barrel assembly.