Claims
- 1. A composition which foams upon being heated to a predetermined temperature, comprising:
a blowing agent; a binder component in an amount from about 10 to about 100 parts by weight, said binder component being a wax having a weight average molecular weight of less than 10,000; a surfactant in an amount from about 1 to about 50 parts by weight; and a filler component in an amount from about 5 to about 75 parts by weight, wherein said composition has been processed at a temperature below an activation temperature of said blowing agent in order to prevent premature degradation, wherein said composition is in a solid particulate form; and wherein said parts by weight are based on 100 parts by weight of said blowing agent.
- 2. A composition according to claim 1, wherein said at least one blowing agent is an endothermic blowing agent or an exothermic blowing agent, or a combination thereof.
- 3. A composition according to claim 2, wherein said particulate form is a pellet, chip or flake.
- 4. A composition according to claim 2, wherein said wax is an ethylene bis-stearamide wax, a hydroxystearamide wax, or a combination thereof.
- 5. A composition according to claim 2, wherein said wax is an ethylene bis-stearamide wax, a hydroxystearamide wax, a polycaprolactam wax, a polyolefin wax, or a combination thereof.
- 6. A composition according to claim 2, wherein said binder is present in an amount from about 25 parts to about 50 parts by weight, wherein said surfactant is present in an amount from about 4 parts to about 20 parts by weight, and wherein said filler is present in an amount from about 30 parts to about 60 parts by weight.
- 7. A composition according to claim 6, wherein said composition includes a functional compounding additive in an amount from about 1 part to about 100 parts.
- 8. A composition according to claim 7, wherein said surfactant is mineral oil, castor oil, soybean oil, or a combination thereof.
- 9. A composition according to claim 8, wherein said filler is calcium carbonate, silica, alumina, talc, a sulfate, a sulfide, mica, or a combination thereof.
- 10. A molded article comprising a polymeric material and a composition according to claim 9.
- 11. A method for preparing a foamable composition for use in polymeric materials, comprising the steps of:
compounding said foamable composition comprising at least one blowing agent, a binder component in an amount from about 10 to about 100 parts by weight, said binder component being a wax having a weight average molecular weight of less than 10,000, a surfactant in an amount from about 1 to about 50 parts by weight, a filler component in an amount from about 5 to about 75 parts by weight and optionally, a functional additive, said parts by weight based on 100 parts by weight of said blowing agent; mixing said composition at a temperature below an activation temperature of said blowing agent; and cold compression molding said composition into a particulate form.
- 12. A method for preparing a foamable composition according to claim 11, wherein said cold compression molding step is conducted at a temperature below the activation temperature of said at least one blowing agent.
- 13. A method according to claim 12, wherein said at least one blowing agent is an endothermic blowing agent or an exothermic blowing agent, or a combination thereof.
- 14. A method according to claim 13, wherein said composition is in the form of a pellet, chip or flake.
- 15. A method according to claim 11, wherein said wax is an ethylene bis-stearamide wax, a hydroxystearamide wax, or a combination thereof.
- 16. A method according to claim 15, wherein said wax is an ethylene bis-stearamide wax, a hydroxystearamide wax, a polycaprolactam wax, a polyolefin wax, or a combination thereof.
- 17. A method according to claim 16, wherein said binder is present in an amount from about 25 parts to about 50 parts by weight, wherein said surfactant is present in an amount from about 4 parts to about 10 parts by weight, and wherein said filler is present in an amount from about 30 parts to about 60 parts by weight.
- 18. A method according to claim 17, wherein said composition includes a functional compounding additive in an amount from about 1 part to about 100 parts by weight.
- 19. A method according to claim 18, wherein said filler is calcium carbonate, silica, alumina, talc, a sulfate, a sulfide, mica or a combination thereof.
- 20. A molded article comprising a composition prepared according to the method of claim 19, and a polymeric material.
CROSS REFERENCE
[0001] This application claims the benefit of prior filed co-pending provisional application 60/302,264 filed Jun. 29, 2001 of the same title; and a continuation-in-part of co-pending non-provisional application Ser. No. 10/126,312 filed Apr. 19, 2002, which is a continuation-in-part of prior application Ser. No. 09/844,459, filed Apr. 27, 2001, now U.S. Pat. No. 6,384,002, both entitled “A Composition and Method for Purging Polymer Processing Equipment.”
Provisional Applications (1)
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Number |
Date |
Country |
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60302264 |
Jun 2001 |
US |
Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
10126312 |
Apr 2002 |
US |
Child |
10171055 |
Jun 2002 |
US |
Parent |
09844459 |
Apr 2001 |
US |
Child |
10171055 |
Jun 2002 |
US |