Thermoplastic elastomer made of styrene-isoprene-styrene block polymer grafted polyoxyethylene ether as well as amphiphilic hot-melt pressure-sensitive adhesive

A thermoplastic elastomer and styrene block technology, applied in adhesives, adhesive additives, polymer adhesive additives, etc., can solve problems such as unsatisfactory bonding effect and less research on chemically modified structure-function correlations , to achieve good adhesion performance and thermal stability, good hygroscopicity

Active Publication Date: 2015-09-23
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there are few studies on the chemical modification of SIS amphiphilicity and the correlation between structure and function. Chinese patent CN103773000A discloses a star-shaped styrene-based thermoplastic elastomer. The long styrene blocks formed ensure that the system has sufficient physical interaction. joint point and cohesive strength, and at the same time achieve the purpose of regulating its processing temperature; Chinese patent CN103087279A discloses a thermoplastic elastomer containing polar styrene blocks, which is based on linear styrene thermoplastic Elastomer polymer is the main chain, and the styrene block has polar branched chain polymers, which overcomes the disadvantages of SBC-based adhesives that have unsatisfactory bonding effects on polar materials

Method used

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  • Thermoplastic elastomer made of styrene-isoprene-styrene block polymer grafted polyoxyethylene ether as well as amphiphilic hot-melt pressure-sensitive adhesive
  • Thermoplastic elastomer made of styrene-isoprene-styrene block polymer grafted polyoxyethylene ether as well as amphiphilic hot-melt pressure-sensitive adhesive
  • Thermoplastic elastomer made of styrene-isoprene-styrene block polymer grafted polyoxyethylene ether as well as amphiphilic hot-melt pressure-sensitive adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1Synthesis of SIS-g-PEO thermoplastic elastomer

[0037] According to the characteristic of above-mentioned graft polymer, adopt hydrogen peroxide in-situ oxidation method to prepare epoxidized SIS; Anhydrous formic acid is used as catalyst, by adjusting the amount of oxidant hydrogen peroxide, obtain epoxidized SIS with different epoxy degrees ( ESIS) thermoplastic elastomer. Then the ESIS is subjected to a ring-opening grafting reaction; first, the macromolecules containing the polyoxyethylene ether segment are reacted with an alkali to generate potassium alkoxide; immediately after the reaction, the potassium alkoxide solution and the ESIS toluene solution are added to the autoclave, sealed, and The reaction was carried out under the protection of atmospheric pressure N2. Amphiphilic SIS-g-PEO thermoplastic elastomers with different graft ratios were obtained.

[0038]

Embodiment 2

[0039] Example 2The hygroscopicity and drug release test of SIS and SIS-g-PEO thermoplastic elastomer film

[0040] According to the preparation method of the thermoplastic elastomer film in the manual, a blank thermoplastic elastomer film with a thickness of 100±5um was obtained, and the SIS and the blank amphiphilic thermoplastic elastomer SIS-g-PEO film were tested with reference to the hygroscopicity test method. Hygroscopicity test; at the same time, according to the preparation method of the medicated thermoplastic elastomer film, a medicated thermoplastic elastomer film with a thickness of 100±5um was obtained, and then the SIS and the amphiphilic thermoplastic elastomer SIS were investigated with reference to the release performance measurement method -24h cumulative release rate of oleanolic acid and geniposide in g-PEO film, the results are as follows:

[0041]

Embodiment 3

[0042] The preparation of embodiment 3 hot melt pressure sensitive adhesive

[0043] SIS type hot melt pressure sensitive adhesive: 10 parts of SIS thermoplastic elastomer, 4 parts of mineral oil, 10 parts of C5 resin; according to this formula, add SIS thermoplastic elastomer, mineral oil and C5 resin into tetrahydrofuran, and add an appropriate amount of anti- Oxygen agent with a solid content of 40%, stirred at 300 r / min at room temperature for 60 min, and the obtained SIS hot-melt pressure-sensitive adhesive matrix was used as a control.

[0044] Amphiphilic SIS-g-PEO hot-melt pressure-sensitive adhesive: According to the preparation method in the following formula and instructions, mix an appropriate amount of SIS-g-PEO amphiphilic thermoplastic elastomer, mineral oil and tackifying resin, antioxidant Adding tetrahydrofuran, the solid content is 40%, and stirring at room temperature for 60 min at 300 r / min to obtain an amphiphilic SIS-g-PEO hot-melt pressure-sensitive adh...

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Abstract

The invention belongs to the technical field of hot-melt pressure-sensitive adhesive, and relates to an SIS-g-PEO thermoplastic elastomer made of styrene-isoprene-styrene block polymer grafted polyoxyethylene ether as well as an amphiphilic hot-melt pressure-sensitive adhesive. An SIS block polymer grafted hydrophilic chain segment is subjected to chemical modification, so that the thermoplastic elastomer has good release performance on hydrophilic/lipophilic components. The amphiphilic hot-melt pressure-sensitive adhesive prepared by SIS-g-PEO has good adhesion performance, releases hydrophilic/lipophilic components together, has good moisture absorption, and is suitable for being used as pressure-sensitive adhesive medicine carrying substrate of a transdermal patch.

Description

technical field [0001] The invention belongs to the technical field of hot-melt pressure-sensitive adhesives, and relates to a thermoplastic elastomer of styrene-isoprene-styrene block polymer (SIS) grafted with polyoxyethylene ether (PEO) and an amphiphilic thermoplastic elastomer. Melt pressure sensitive adhesive. Background technique [0002] The basic composition of hot-melt pressure-sensitive adhesives is matrix resin, tackifying resin, plasticizer, anti-aging agent or antioxidant; the matrix resin is a thermoplastic elastomer, which is the main component of pressure-sensitive adhesives, and mainly gives pressure-sensitive adhesives cohesive strength, film-forming properties, etc. Hot-melt pressure-sensitive adhesive has thermoplastic processability. It can be mixed and coated in the molten state. After cooling and solidification, it can be quickly bonded by applying light finger pressure. At the same time, it can be peeled off relatively easily without polluting the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02C09J187/00C09J11/08C08J5/18
Inventor 汪晴李扬李晓晖申凯华包春艳
Owner DALIAN UNIV OF TECH
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