A kind of removable hot-melt pressure-sensitive adhesive and preparation method thereof

A technology of hot-melt pressure-sensitive adhesives and pressure-sensitive adhesives, which is applied in the direction of pressure-sensitive films/sheets, adhesives, heat-activated films/sheets, etc., and can solve problems such as failure to open repeatedly normally, large peeling force, and rubber sleeve tearing off, etc. Achieve good retention, easy peeling, and good adhesion

Active Publication Date: 2018-08-31
河北方大新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since water-based sealing adhesives are limited in PE or PP film products, hot-melt pressure-sensitive adhesives can also be coated on both sides of the substrate, but the existing sealing tapes of the same type of adhesives cannot work normally after the adhesive strips are placed. The problem that the rubber sleeve will be torn off after repeated opening and the peeling force is slightly large

Method used

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  • A kind of removable hot-melt pressure-sensitive adhesive and preparation method thereof
  • A kind of removable hot-melt pressure-sensitive adhesive and preparation method thereof
  • A kind of removable hot-melt pressure-sensitive adhesive and preparation method thereof

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preparation example Construction

[0024] The preparation method of the above-mentioned hot-melt pressure-sensitive adhesive is carried out according to the following steps:

[0025] a. Weigh the components of the raw materials according to the formula, take dioctyl terephthalate, liquid petroleum resin, antioxidant 1076 and antioxidant 168 and put them into the reactor, heat and stir, and pour into the reactor while stirring Introduce nitrogen for protection to prevent aging and degradation of raw materials;

[0026] b. When the heating temperature reaches 135±5°C, slowly add SIS and 1 / 3 of the amount of C5 petroleum resin, and stir for 5 minutes; continue to stir and heat to 165±5°C, and keep the temperature at 25 rpm Stir for 120 minutes; keep the temperature range of 165±5°C because if the temperature is too low, it will cause incomplete melting and SIS agglomeration, and if the temperature is too high, it will cause thermal oxidation and degradation at high temperature due to unsaturated double bonds in SI...

Embodiment 1

[0038] The hot-melt pressure-sensitive adhesive is prepared according to the following formula in units of parts by mass in kg.

[0039] Formulation list of table 1 hot-melt pressure-sensitive adhesive

[0040]

[0041]

[0042] The preparation method of hot melt pressure sensitive adhesive is as follows:

[0043] a. take each component by the proportioning ratio of embodiment 3, get dioctyl terephthalate (DOTP), liquid petroleum resin, antioxidant 1076 and antioxidant 168 and all drop in the reactor, stir and heat, At the same time, nitrogen protection was introduced.

[0044] b. When the heating temperature reaches 135°C, slowly add 1 / 3 part of C5 petroleum resin 3200, which is 11kg and all SIS 1105, and stir for 5 minutes; minutes) 120 minutes;

[0045] c. Add polyethylene wax and UV531 under the condition of temperature control and stirring, and add the remaining C5 petroleum resin in 2 times, with an interval of 5 minutes between the two additions, and keep stirr...

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Abstract

The invention relates to a removable hot-melt pressure-sensitive adhesive and belongs to the technical field of adhesives. The pressure-sensitive adhesive is prepared from raw materials in parts by mass as follows: 35-45 parts of matrix resin, namely, a styrene-isoprene-styrene triblock copolymer, 30-40 parts of a tackifier, namely, C5 petroleum resin, 8-13 parts of a softener, namely, dioctyl terephthalate, 3-8 parts of a peel strength modifier, namely, polyethylene wax, 7-15 parts of a viscosity modifier, namely, liquid petroleum resin, 0.6-1.4 parts of an antioxidant and 0.4 parts of an ultraviolet absorbent. An adhesive tape prepared from the pressure-sensitive adhesive can be peeled and pasted repeatedly, and the adhesive cannot be transferred after the pressure-sensitive adhesive is pasted with paper, PE films, PP films and the like. The pressure-sensitive adhesive meets the environmental protection requirement of European Union REACH and RoHS on the basis of detection of specialized agencies and can completely meet the requirement of production of sealing labels, labels and removable adhesive bags.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a hot-melt pressure-sensitive adhesive suitable for labels, adhesive bags, sealing labels and the like. Background technique [0002] Sealing tape is mainly used for sealing plastic bags such as envelopes, stationery, and clothing. The sealing adhesives mainly include hot-melt pressure-sensitive adhesive sealing adhesives, oil-based sealing adhesives and water-based sealing adhesives. The earliest oil-based sealing adhesives generally use toluene as solvents, and the main raw materials are rubber, terpene resin, rosin, etc., which have a strong smell and cause great damage to the operators; the water-based sealing adhesives developed in the past ten years are those that will The main raw materials such as polymers and water-soluble resins are dissolved in solvent water, and the odor is small. However, due to the energy consumption of drying water, and most PE and PP films are n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J153/02C09J11/08C09J11/06C09J7/35C09J7/38
CPCC08L2205/025C08L2205/035C09J11/06C09J11/08C09J153/02C09J2301/124C09J2301/312C09J2301/408C08L57/02C08L23/06C08K5/00C08K5/12C08K5/1345C08K5/526C08K5/132
Inventor 杨志杜中泰
Owner 河北方大新材料股份有限公司
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