Thermoplastic elastomer mixed soft segment and preparation method thereof

A thermoplastic elastomer, soft segment technology, applied in the field of copolymers, can solve the problems of uncontrollable reaction, unavoidable, unstable isocyanate group, etc.

Active Publication Date: 2015-11-11
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problems in this method are as follows: 1): The isocyanate group is extremely active, and when the soft chain segment is connected, it reacts with the soft chain segment too fast, causing the reaction to be uncontrollable, and the degree of reaction cannot be detected; 2): due to relying on The isocyanate connects the two amino-terminated soft chain segments, wh

Method used

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  • Thermoplastic elastomer mixed soft segment and preparation method thereof
  • Thermoplastic elastomer mixed soft segment and preparation method thereof
  • Thermoplastic elastomer mixed soft segment and preparation method thereof

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Embodiment Construction

[0008] Technical scheme of the present invention is as follows:

[0009] A mixed soft segment of a thermoplastic elastomer, the mixed soft segment is a polyether-polysiloxane mixed segment polymer, the structural formula is as follows:

[0010]

[0011] The preparation method of the mixed soft segment of the above-mentioned thermoplastic elastomer comprises the following steps:

[0012] (1) In organic solvent A, (acrylate group methyl) dimethacrylate group silane reacts with hydroxyl-terminated polydimethylsiloxane, solvent A is removed, and acrylate group group-terminated polydimethylsiloxane is obtained. Silicone;

[0013] (2) At room temperature, dissolve the amino-terminated polyether in solvent B, under the protection of an inert gas, heat up to 15-30°C, add the acrylate-methyl-terminated polysiloxane prepared in step (1), Insulate and stir for 12-24 hours to carry out the polymerization reaction. After the reaction, the solvent B is removed in vacuum at 20-60° C. to...

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Abstract

The invention relates to a thermoplastic elastomer mixed soft segment and a preparation method thereof. The preparation method comprises the following steps: (1) reacting (acrylate-base methyl) dimethyl-acrylate-base silane with hydroxyl-terminated polydimethylsiloxane in an organic solvent to obtain acrylate-base methyl-terminated polysiloxane; and (2) dissolving amino-terminated polyether in a solvent B at room temperature, heating to 15-30 DEG C in an inert gas protective atmosphere, adding the acrylate-base methyl-terminated polysiloxane, and stirring for 12-24 hours while keeping the temperature to perform polymerization reaction, thereby obtaining the mixed soft segment. The polyether-polysiloxane mixed segment polymer product has stable properties, and can be easily characterized. The amine-olefine addition reaction is utilized to connect the polyether and polysiloxane; and the whole polymerization process has the advantages of stable and efficient reaction, high reaction degree (up to 100%), no need of any catalyst, and no byproduct generation.

Description

Technical field: [0001] The invention relates to a mixed soft segment of a thermoplastic elastomer and a preparation method thereof, belonging to the technical field of copolymers. Background technique: [0002] Thermoplastic polyurea-polysiloxane block copolymerized elastomer has been highly concerned and researched in the past 20 years due to its excellent mechanical properties and stable chemical properties; it consists of polysiloxane as the soft segment and polyurea as the hard chain Segments, which are connected in a certain order to form elastomer molecular segments; in thermoplastic elastomers, in view of the shortcomings of a single soft segment, the introduction of a second soft segment can effectively overcome the shortcomings of a single soft segment, making thermoplastic elastomers both It has the excellent performance of two kinds of soft segments. [0003] Due to the huge difference in the solubility parameters of the non-polar polysiloxane chains and the hig...

Claims

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Application Information

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IPC IPC(8): C08G77/46C08F283/12C08F230/08
Inventor 张洁张京哲张玉晗冯圣玉
Owner SHANDONG UNIV
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