Preparation of degradable polyester composites and use thereof

Patent metadata

Field	Value
Publication number	US-2023399506-A1
Application number	US-202218054842-A
Country	US
Kind code	A1
Filing date	Nov 11, 2022
Priority date	Jun 12, 2022
Publication date	Dec 14, 2023
Grant date	—

Abstract

The polyester based polymer composition includes a polyester, a metal oxide, and a metal hydroxide. The polymer composites contains the metal oxide and a metal hydroxide made from melting blending has good mechanical property as well as greater degradability after a required time in the higher temperatures and moisture of downhole conditions. The reinforced polymer composites with glass fibers, and the metal oxide and metal hydroxide made from melting blending has higher mechanical property as well as greater degradability after a required time in the higher temperatures and moisture of downhole conditions. The polymer composites made from melting blending have the required mechanical properties and the degradability so that the polymer composites can be used for degradable or dissolvable component of a downhole tool.

First claim

We claim:

1 . A degradable composite, comprising:
about 20-70% by weight of polyester; about 4-30% by weight of a metal oxide, and a metal hydroxide, and about 1-50% by weight of fiber, wherein the composite has a tensile strength of at least about 90 MPa.

2 . The degradable composite according to claim 1 , wherein the polyester is about 30-60% by weight of the composite.

3 . The degradable composite according to claim 1 , wherein the metal oxide is about 2-25% of the composites.

4 . The degradable composite according to claim 1 , wherein the metal hydroxide is about 2-15% of the composites.

5 . The degradable composite according to claim 1 , wherein the fiber is about 10-50% of the composites.

6 . The degradable composite according to claim 1 , wherein the polyester is polyethylene terephthalate (PET).

7 . The degradable composite according to claim 1 , wherein the polyester is polyethylene naphthalate (PEN).

8 . The degradable composite according to claim 1 , wherein the metal oxide is calcium oxide, or magnesium oxide, or aluminum oxide.

9 . A method of manufacturing a degradable composite, comprising;
a. heating a polyester, metal oxide, metal hydroxide above melting point of the polyester to form a mixture; b. blending the mixture during the heating to form evenly distributed composite; and c. compression molding the evenly distributed composite above the melting temperature of the polyester.

10 . The method of claim 9 , wherein the polyester is about 20-70% by weight.

11 . The method of claim 9 , wherein the mixture further comprises fiber.

12 . The method of claim 11 , wherein the fiber is about 10-50% of the composite.

13 . The method of claim 9 , wherein the metal oxide and metal hydroxide is about 4-30%.

14 . The method of claim 9 , wherein the polyester is either polyethylene terephthalate (PET).

15 . The method of claim 9 , wherein the polyester is polyethylene naphthalate (PEN).

16 . The method of claim 9 , wherein the metal oxide is calcium oxide, or magnesium oxide, or aluminum oxide.

17 . A degradable composite, comprising:
polyester; a metal oxide, and a metal hydroxide, and fiber, wherein the composite has a tensile strength of at least about 80 MPa.

18 . The degradable composite according to claim 17 , wherein the metal oxide is about 2-25% of the composites.

19 . The degradable composite according to claim 17 , wherein the metal hydroxide is about 2-15% of the composites.

20 . The degradable composite according to claim 17 , wherein the metal hydroxide is calcium hydroxide, magnesium hydroxide, or aluminum hydroxide.

Assignees

• Cnpc Usa Corp
• Beijing Huamei Inc
• China Nat Petroleum Corp

Inventors

• Xing Peixiang
• Ren Jiaxiang
• Cheng Peng

Classifications

• C08L67/02 Primary

  Polyesters derived from dicarboxylic acids and dihydroxy compounds (C08L67/06 takes precedence) · CPC title

• C08K3/22 Primary

  of metals · CPC title

• C08L2201/06

  Biodegradable · CPC title

• C08K2003/2224

  Magnesium hydroxide · CPC title

• C08K2003/2206

  of calcium, strontium or barium · CPC title