A radiation-crosslinked medical pressure-sensitive adhesive and its preparation method

A pressure-sensitive adhesive and irradiation technology, applied in the field of pressure-sensitive adhesives, can solve problems such as skin allergies, and achieve the effects of improving integrity, improving integrity and viscosity, and improving solvent resistance.

Active Publication Date: 2018-10-26
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Products prepared by this method are not suitable for medical materials and may easily cause skin allergies

Method used

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  • A radiation-crosslinked medical pressure-sensitive adhesive and its preparation method
  • A radiation-crosslinked medical pressure-sensitive adhesive and its preparation method
  • A radiation-crosslinked medical pressure-sensitive adhesive and its preparation method

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preparation example Construction

[0029] The invention also discloses a preparation method of radiation-crosslinked medical pressure-sensitive adhesive, the preparation method comprising the following steps:

[0030] Step 1): at 130-160° C., banburying the block copolymer, polyisobutylene, tackifying resin, antioxidant and plasticizer by parts by weight for 1-10 minutes;

[0031] Step 2): After lowering the temperature to 90-100°C, add water-absorbing components and continue banburying for 5-10 minutes;

[0032] Step 3): After taking out the banburying product of step 2), use a flat vulcanizing machine at 100-120°C to press it into a 1-2mm thick sheet-like plate;

[0033] Step 4): putting the sheet-like plate into an electron accelerator for radiation cross-linking, the radiation dose is 5-8 Mrad.

Embodiment 1

[0035] Using a Brabender internal mixer, at 140°C, 15 parts of block copolymer SIS, 20 parts of polyisobutylene, 20 parts of tackifying resin, 1 part of antioxidant After banburying 10 minutes of plasticizer and 9 parts of plasticizer, the temperature was lowered to 100°C and 40 parts of water-absorbing components were added and mixed for 10 minutes to obtain a blend. Press into a sheet-like sample with a thickness of 1mm.

[0036] The polyisobutene is composed of two kinds of polyisobutene with weight average molecular weights of 85000 and 40000 respectively mixed in a weight ratio of 1:2; the tackifying resin is rosin resin, and the antioxidant is antioxidant 1010; the plasticizer is naphthene oil; the water-absorbing component is guar gum.

Embodiment 2

[0038] Using a Brabender internal mixer, at 140°C, 15 parts of block copolymer SIS, 20 parts of polyisobutylene, 20 parts of tackifying resin, 1 part of antioxidant After banburying 10 minutes of plasticizer and 9 parts of plasticizer, the temperature was lowered to 100°C and 40 parts of water-absorbing components were added and mixed for 10 minutes to obtain a blend. Press into a sheet-like sample with a thickness of 1mm. Put the prepared flake sample into an electron accelerator for irradiation cross-linking, and the irradiation dose is 7Mrad.

[0039] The polyisobutene is composed of two kinds of polyisobutene with weight average molecular weights of 85000 and 40000 respectively mixed in a weight ratio of 1:2; the tackifying resin is rosin resin, and the antioxidant is antioxidant 1010; the plasticizer is naphthene oil; the water-absorbing component is guar gum.

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Abstract

The invention discloses a novel irradiation crosslinking medical pressure-sensitive adhesive. The medical pressure-sensitive adhesive is prepared from, by weight, 10-15 parts of block copolymer, 20-50 parts of polyisobutene, 15-30 parts of tackifying resin, 15-40 parts of water absorption component, 8-10 parts of plasticizer and 1-3 parts of antioxidant, wherein the block copolymer is a styrene-isoprene-styrene block copolymer, and the block ratio S / I is 15 / 85. The medical pressure-sensitive adhesive prepared through irradiation crosslinking has the good mechanical property and adhesive property, and the integrity obtained after water absorption and the viscosity are improved. By means of adopting the method of electronic irradiation for crosslinking in the preparation technology, the prepared medical pressure-sensitive adhesive has the advantages of no solvent, environmental protection and non-pollution production, and moreover, by adding no crosslinking agent, the prepared medical pressure-sensitive adhesive is non-irritating and harmless to a human body, which accords with the medical conditions.

Description

technical field [0001] The invention relates to the field of pressure-sensitive adhesives, in particular to a radiation-crosslinked medical pressure-sensitive adhesive and a preparation method thereof. Background technique [0002] Under normal circumstances, the skin of the human body can maintain the stability of the internal environment of the human body and prevent the invasion of microorganisms. But when the skin is injured, the normal protective function of the skin is damaged, and at this time, medical dressings can protect the human body from injury. The pressure-sensitive adhesive with styrene-isoprene-styrene block copolymer SIS as the main component and other chemical components can well meet the performance required by medical dressings, and the price is low, so it has a broad market . [0003] However, due to the addition of other chemical components such as plasticizers, the component of the block copolymer SIS is diluted, which reduces the cohesion of the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J153/02C09J123/20C09J11/08
CPCC08K2201/014C08L2203/02C08L2205/025C08L2205/035C08L2312/06C09J11/08C09J153/02C08L23/22C08L93/04C08L91/00C08L5/00C08L45/02C08L91/06C08L57/02C08L1/284
Inventor 郝同辉蒋涛程园园张群朝赵辉
Owner HUBEI UNIV
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