Resin composition and manufacturing method therefor

• US 6,562,898 B2
• Filed: 01/11/2001
• Issued: 05/13/2003
• Est. Priority Date: 07/05/2000
• Status: Expired due to Term

• Current Assignee: Katsuhisa Masumoto
• Original Assignee: Katsuhisa Masumoto
• Inventors: Masumoto, Katsuhisa
• Primary Examiner(s): Wu, David W.
• Assistant Examiner(s): Hu, Henry S.
• Application Number:
  US09/759,942
• Publication Number:
  US 20020028873A1
• Time in Patent Office: 852 Days
• Field of Search: 524/580, 427/2.24, 427/2.25, 623/1.43, 623/1.18
• US Class Current: 524/580
• CPC Class Codes: C08K 3/18 Oxygen-containing compounds, e.g. metal carbonyls

Abstract

The present invention relates to resin composition with superior antioxidant properties, mechanical strength and insulating properties. A mixture of a thermoplastic resin in pellet or granular form and water is heated under pressure at a subcritical condition of the water to melt the thermoplastic resin, and the melted resin is cooled.

Claims

1. A resin composition, wherein a mixture of a thermoplastic resin in pellet or granular form and water is melted using heat and pressure under a subcritical condition of the water, and the melted resin is cooled, wherein the water includes antioxidizing substances produced by groups of effective microorganisms, and wherein the pressure is in a range of between 15 and 22 MPa.

2. The resin composition of claim 1, wherein the water is natural unchanged water.

3. The resin composition of claim 1 wherein the mixture is heated at a temperature of between 200 and 250°

C.

4. The resin composition of claim 1, wherein the water is purified water or distilled water.

5. The resin composition according to claim 1, wherein the thermoplastic resin is polyethylene or polypropylene.

6. The resin composition according to claim 1, wherein the melted resin is cooled using cold water with impurities removed.

13. The resin composition of claim 3, wherein the composition is used to insulate and rustproof electrical wiring.

14. The resin composition of claim 3, wherein the composition is used to line pipes so that the pipes remain free of rust.

7. A method for manufacturing a resin composition comprising a first stage wherein a thermoplastic resin in pellet or granular form is mixed and stirred in water, and the water includes antioxidizing substances produced by groups of effective microorganism, a second stage wherein the mixture is heated using heat and pressure under a subcritical condition of the water and the thermoplastic resin is melted and the pressure is in a range of between 15 and 22 MPa, and a third stage wherein the melted resin obtained in the second stage is cooled.

8. The method for manufacturing a resin composition according to claim 7, wherein the water is natural unchanged water.

9. The method of manufacturing a resin composition according to claim 7, wherein the mixture is heated at a temperature of between 200 and 250°

C.

10. The method for manufacturing a resin composition according to claim 7, wherein the water is purified water or distilled water.

11. The method according to claim 7, wherein the melted resin obtained in the second stage is cooled using cold water with impurities removed.

12. The method for manufacturing a resin composition according to claim 7, wherein the thermoplastic resin is polyethylene or polypropylene.