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Amphiprotic co-continuous polymer network, preparation method and application thereof

A polymer and co-continuous technology, applied in the field of amphoteric co-continuous polymer network and its preparation, can solve the problems of network performance deterioration and achieve good oxygen transmission rate and temperature sensitivity

Inactive Publication Date: 2011-06-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, polyethylene oxide is often used as one of the raw materials to prepare amphoteric co-continuous network (PCT Int.Appl. (2006), WO 2006118987 A1 20061109), because polyethylene oxide will undergo oxidative degradation under natural conditions, resulting in network performance It deteriorates during use, so it is necessary to use other raw materials with antioxidant capacity to prepare a new type of amphoteric co-continuous network

Method used

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Examples

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example 1

[0019] (1) Synthesis of 3-(1,1,3,3-tetramethyldisiloxane) propyl methacrylate: under normal temperature water bath, under stirring conditions, 1 part of tetramethyldisiloxane, 1 Parts of allyl methacrylate and 300 ppm Karstedt's catalyst were reacted for 3 hours, then 0.1 part of triphenylphosphine was added and stirred for 1 hour. Then vacuum distillation and rectification were carried out at 50° C. to obtain 0.3 parts of 3-(1,1,3,3-tetramethyldisiloxane)propyl methacrylate.

[0020] (2) Preparation of modified unsaturated organosiloxane polymer mixture: 60 parts of polydimethylsiloxane with vinyl end groups on both sides, 1 part of methacrylic acid-3-(1,1,3, 3-Tetramethyldisiloxane) propyl ester was dissolved in 70 parts of toluene, and 500 ppm Karstedt catalyst was added under stirring, and reacted at 45° C. for 2 hours to obtain vinyl on one side and methyl on one side. Acrylate-based polydimethylsiloxane mixture, set aside.

[0021] (3) Synthesis of graft copolymer: 1 p...

example 2

[0025] (1) Synthesis of 3-(1,1,3,3-tetramethyldisiloxane) propyl methacrylate: under normal temperature water bath, under stirring conditions, 1 part of tetramethyldisiloxane, 1 Parts of allyl methacrylate (126 g, 1 mol), 100 ppm Karstedt's catalyst After the reaction was carried out for 6 hours, 0.2 parts of triphenylphosphine was added. Then carry out vacuum distillation and rectification at 50°C to obtain 3-(1,1,3,3-tetramethyldisiloxane)propyl methacrylate.

[0026] (2) Preparation of modified unsaturated organosiloxane polymer mixture: 60 parts of polydimethylsiloxane with vinyl end groups on both sides, 1 part of methacrylic acid-3-(1,1,3, Dissolve 3-tetramethyldisiloxane) propyl ester in 70 parts of toluene, add 500ppm of Karstedt catalyst under stirring, and react at 35-75°C for 3 hours to obtain vinyl on one side and vinyl on one side It is a polydimethylsiloxane mixture of methacrylate, and it is ready for use.

[0027] (3) Synthesis of graft copolymer: 1 part of N...

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PUM

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Abstract

The invention relates to an amphoteric co-continuous polymer network. The amphoteric co-continuous polymer network is prepared through chemical crosslinking reaction by using an organic siloxane polymer as a raw material and N-isopropyl acrylamide as a reactant monomer to generate a graft copolymer. The gel dissolving rate in water is in the range of 0-10%, the swelling rate in water is in the range of 20-50%, and the oxygen transmissibility is in the range of 150-600 barrers. The invention also relates to a method for producing the amphoteric co-continuous polymer network. The method comprises the following steps: (1) synthesis of methacrylic acid-3-(1,1,3,3-tetramethyldisiloxane)propyl ester; (2) preparation of a modified unsaturated organic siloxane polymer mixture; (3) synthesis of the graft copolymer; and (4) preparation of amphoteric co-continuous network. The amphoteric co-continuous polymer network is used for biomedical materials, including contact lens, artificial organs, controlled-release drug carriers etc.

Description

technical field [0001] The invention belongs to the field of polymer synthesis and application, and in particular relates to an amphoteric co-continuous polymer network and its preparation method and application. Background technique [0002] At present, polyethylene oxide is often used as one of the raw materials to prepare amphoteric co-continuous network (PCT Int.Appl. (2006), WO 2006118987 A1 20061109), because polyethylene oxide will undergo oxidative degradation under natural conditions, resulting in network performance It deteriorates during use, so it is necessary to use other raw materials with antioxidant capacity to prepare a new type of amphoteric co-continuous network. [0003] The Si-O bond energy (450KJ / mol) in silicone polymer is much greater than the C-C bond energy (345KJ / mol) and C-O bond energy (35lKJ / mol), and has excellent high temperature resistance, UV and infrared radiation resistance, Resistance to oxidative degradation; the surface energy of silic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/20C08G77/42G02C7/04A61L27/18A61K47/34
Inventor 何春菊
Owner DONGHUA UNIV
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