Polyurethane thermoplastic elastomer modified by amino POSS and preparation method of thermoplastic elastomer

A thermoplastic elastomer and polyurethane technology, applied in the field of amino-POSS modified polyurethane thermoplastic elastomer and its preparation, can solve the problems of poor compatibility between POSS and polyurethane, unfavorable long-life use of materials, low dielectric constant, etc. The effect of improving surface hydrophobicity, improving elongation at break, increasing tensile strength and elongation at break

Active Publication Date: 2019-10-01
道勤材料技术(麻城)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite material prepared by this patent has a lower dielectric constant and better mechanical properties, but using the preparation method of this patent, the compatibility of POSS and polyurethane is not good, so as time goes by, POSS will change from polyurethane Precipitation in the system, which is not conducive to the long-life use of the material

Method used

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  • Polyurethane thermoplastic elastomer modified by amino POSS and preparation method of thermoplastic elastomer
  • Polyurethane thermoplastic elastomer modified by amino POSS and preparation method of thermoplastic elastomer
  • Polyurethane thermoplastic elastomer modified by amino POSS and preparation method of thermoplastic elastomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] First weigh each component by the following parts by weight:

[0037] Amino POSS: 1 part;

[0038] Isophorone diisocyanate: 50 parts;

[0039] Polytetrahydrofuran: 30 parts;

[0040] Dibutyltin dilaurate: 0.1 part;

[0041] Acetone: 100 parts;

[0042] Then in high purity N 2 Under protection, dissolve the water-removing polytetrahydrofuran PTMG in dry acetone, stir well, add the catalyst dibutyltin dilaurate and heat to a slight boil.

[0043] Then slowly add isophorone diisocyanate IPDI, reflux reaction for 3 hours, add amino POSS, continue to react for 1 hour and then stop heating;

[0044] The resulting emulsion was left to stand at room temperature until there were no obvious bubbles, then slowly poured into a polytetrafluoroethylene mold, and left to stand at room temperature for 1 day to obtain the amino POSS-modified polyurethane thermoplastic elastomer material.

Embodiment 2

[0046] First weigh each component by the following parts by weight:

[0047] Amino POSS: 4 parts;

[0048] Isophorone diisocyanate: 50 parts;

[0049] Polytetrahydrofuran: 30 parts;

[0050] Dibutyltin dilaurate: 0.1 part;

[0051] Acetone: 105 parts;

[0052] Then in high purity N 2 Under protection, dissolve the water-removing polytetrahydrofuran PTMG in dry acetone, stir well, add the catalyst dibutyltin dilaurate and heat to a slight boil;

[0053] Then slowly add isophorone diisocyanate IPDI, reflux reaction for 4 hours, add amino POSS, continue to react for 1 hour, then stop heating;

[0054] The resulting emulsion was left to stand at room temperature until there were no obvious bubbles, then slowly poured into a polytetrafluoroethylene mold, and left to stand at room temperature for 1 day to obtain the amino POSS-modified polyurethane thermoplastic elastomer material.

Embodiment 3

[0056] First weigh each component by the following parts by weight:

[0057] Amino POSS: 7 parts;

[0058] Isophorone diisocyanate: 50 parts;

[0059] Polytetrahydrofuran: 40 parts;

[0060] Dibutyltin dilaurate: 0.1 part;

[0061] Acetone: 110 parts;

[0062] Then in high purity N 2 Under protection, dissolve the water-removing polytetrahydrofuran PTMG in dry acetone, stir well, add the catalyst dibutyltin dilaurate and heat to a slight boil;

[0063] Then slowly add isophorone diisocyanate IPDI, reflux reaction for 5 hours, add amino POSS, continue to react for 1 hour and stop heating;

[0064] The resulting emulsion was left to stand at room temperature until there were no obvious bubbles, then slowly poured into a polytetrafluoroethylene mold, and left to stand at room temperature for 1 day to obtain the amino POSS-modified polyurethane thermoplastic elastomer material.

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Abstract

The invention discloses a preparation method of a polyurethane thermoplastic elastomer modified by amino POSS. The method comprises the steps that under protection of nitrogen, polytetrahydrofuran isdissolved in acetone, after uniform stirring, a catalyst dibutyltin dilaurate is added, and the mixture is heated to be slightly boiled; isophorone diisocyanate is slowly added, a backflow reaction isconducted for 3-5 hours, the amino POSS is added, and after a reaction continues to be conducted for 1-2 hours, heating is stopped; an obtained emulsion is subjected to standing at the normal temperature until no bubbles exist, the emulsion is slowly poured into a polytetrafluoroethylene mold, and after one day of standing at the normal temperature, the polyurethane thermoplastic elastomer modified by the amino POSS is obtained. By means of the preparation method, the mechanical performance and surface hydrophobicity of modified polyurethane can be improved, and the application range of a polyurethane material is further enlarged.

Description

technical field [0001] The invention relates to the field of polyurethane thermoplastic elastomer synthesis, in particular to an amino POSS-modified polyurethane thermoplastic elastomer widely used in the fields of films and adhesives and a preparation method thereof. Background technique [0002] Polyurethane has the advantages of excellent flexibility, light stability, abrasion resistance, chemical resistance and weather resistance, and is one of the most widely used polymer materials. Structural modification of polyurethane to improve its comprehensive performance has become a key research direction of domestic and foreign scholars in this field. [0003] At present, the modification of polyurethane is mainly divided into physical modification and chemical modification. Physical modification is mainly to add various fillers to polyurethane, but the effect is very small; chemical modification is mainly cross-linking modification. This method has a significant effect. It c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/38
CPCC08G18/289C08G18/4854C08G18/6666
Inventor 赵辉肖文涛
Owner 道勤材料技术(麻城)有限公司
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