A kind of degradable water-soluble elastomer and preparation method thereof

A water-soluble, elastomer technology, applied in the field of thermoplastic elastomers, can solve the problems of inability to meet the needs of use, toxicity of elastomer products, poor water solubility, etc., to achieve good mechanical strength, high elongation at break, guaranteed mechanical performance effect

Active Publication Date: 2021-07-23
FIVE STAR DOWNHOLE SERVICE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the elastomers in the prior art usually have a large molecular weight, and the macromolecular chains are easy to form a complex entanglement structure. After the material contacts water, it will swell first, and then it can be dissolved. The water solubility is not good, and it cannot be well in water. scattered, unable to meet the needs of use in special industries and special oil and gas engineering fields
In addition, most of the elastomers in the prior art are not degradable, especially in oceans, rivers and other water bodies, it often takes hundreds of years for elastomer solid waste to degrade naturally, and a large amount of use will cause serious environmental pollution; many rubber and plastic elastomers Toxic and harmful compounding agents need to be added in the synthesis process of the body, so that the terminal elastomer products often have certain toxicity

Method used

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  • A kind of degradable water-soluble elastomer and preparation method thereof
  • A kind of degradable water-soluble elastomer and preparation method thereof

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Embodiment 1

[0034] The degradable water-soluble elastomer described in this embodiment includes the following components in parts by mass:

[0035] The copolymer of polylactic acid and polyethylene glycol is used as the soft segment prepolymer, and the copolymer of 1,4-butanediol-2-sulfonate and isophorone diisocyanate is used as the hard segment prepolymer. 185 parts of segment copolymer; 30 parts of polyacrylamide; 20 parts of polyvinyl alcohol; 5 parts of hydroxyl silicone oil; 5 parts of sodium polyacrylate.

[0036] Wherein, the mass ratio of polylactic acid and polyethylene glycol in the soft segment prepolymer is 5:100; the number average molecular weight of polyethylene glycol is 1000;

[0037] The mass ratio of 1,4-butanediol-2-sodium sulfonate to isophorone diisocyanate in the hard segment prepolymer is 30:50.

[0038] The preparation method of the degradable water-soluble elastomer described in the present embodiment is as follows:

[0039] S1. Put 100 parts of polyethylene g...

Embodiment 2

[0043] The degradable water-soluble elastomer described in this embodiment includes the following components in parts by mass:

[0044] The copolymer of polylactic acid and polyethylene glycol is used as the soft segment prepolymer, and the copolymer of 1,4-butanediol-2-sulfonate and isophorone diisocyanate is used as the hard segment prepolymer. 100 parts of segment copolymer; 50 parts of guar gum; 5 parts of amino silicone oil; 50 parts of sodium polyacrylate.

[0045] Wherein, the mass ratio of polylactic acid and polyethylene glycol in the soft segment prepolymer is 1:1; the number average molecular weight of polyethylene glycol is 2000;

[0046] The mass ratio of 1,4-butanediol-2-sulfonate to isophorone diisocyanate in the hard segment prepolymer is 1:1.

[0047] The preparation method of the degradable water-soluble elastomer described in the present embodiment is as follows:

[0048] S1. Put 20 parts of polyethylene glycol 2000, 20 parts of lactide and 0.01 part of ca...

Embodiment 3

[0052] The degradable water-soluble elastomer described in this embodiment includes the following components in parts by mass:

[0053] The copolymer of polylactic acid and polyethylene glycol is used as the soft segment prepolymer, and the copolymer of 1,4-butanediol-2-sulfonate and isophorone diisocyanate is used as the hard segment prepolymer. 185 parts of segment copolymer; 3 parts of polyacrylamide, 2 parts of polyvinyl alcohol, 5 parts of hydroxyl silicone oil, and 5 parts of sodium polyacrylate.

[0054] Wherein, the mass ratio of polylactic acid and polyethylene glycol in the soft segment prepolymer is 1:20; the number average molecular weight of polyethylene glycol is 1000;

[0055] The mass ratio of 1,4-butanediol-2-sodium sulfonate to isophorone diisocyanate in the hard segment prepolymer is 3:5.

[0056] The preparation method of the degradable water-soluble elastomer described in the present embodiment is as follows:

[0057] S1. Put 100 parts of polyethylene gl...

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Abstract

The invention provides a degradable water-soluble elastomer and a preparation method thereof. The degradable water-soluble elastomer comprises a soft segment prepolymer of a copolymer of polylactic acid and polyethylene glycol, a sulfonic acid type hydrophilic monomer and The copolymer of isocyanate is a block copolymer of hard segment prepolymer; wherein the mass ratio of soft segment prepolymer to hard segment prepolymer is (25‑120): (25‑80). The preparation method includes: ring-opening polymerization of lactide and polyethylene glycol in the presence of a catalyst to obtain a soft segment prepolymer of polylactic acid and polyethylene glycol copolymer; Polymerization reaction to obtain sulfonic acid type hydrophilic monomer and isocyanate copolymer hard segment prepolymer; mix soft segment prepolymer and hard segment prepolymer to carry out polymerization reaction to obtain degradable water-soluble elastomer. The degradable water-soluble elastomer has good mechanical strength, good dispersibility in water, is degradable, and has environmental protection.

Description

technical field [0001] The invention belongs to the technical field of thermoplastic elastomers, and in particular relates to a degradable water-soluble elastomer and a preparation method thereof. Background technique [0002] Elastomer refers to a polymer material that deforms significantly under weak stress and can quickly return to its original state and size after stress relaxation. Elastomers include rubber and thermoplastic elastomers. Among them, thermoplastic elastomers not only have the excellent properties of high elasticity, aging resistance, and oil resistance of traditional cross-linked vulcanized rubber, but also have the characteristics of convenient processing and wide processing methods of ordinary plastics. Widely used in different fields. [0003] The molecular structure of thermoplastic polyurethane elastomer is composed of soft segments and hard segments alternately. The soft segment with low glass transition temperature forms a continuous matrix, makin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/06C08L33/26C08L29/04C08L83/04C08L33/02C08G18/42C08G18/66C08G18/32
CPCC08G18/3855C08G18/428C08G18/6633C08L75/06C08L2205/035C08L33/26C08L29/04C08L83/04C08L33/02
Inventor 胡毅
Owner FIVE STAR DOWNHOLE SERVICE INC
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