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A kind of cold seal adhesive and its preparation method and a kind of preparation method of adhesive tape

An adhesive and cold-close type technology, which is applied in the direction of adhesive types, ester copolymer adhesives, film/sheet adhesives, etc., can solve the problem of limited effect, uneven monomer concentration, sticky Solve problems such as uneven surface viscosity of the joint belt, achieve the effects of uniform viscosity distribution and thickness, improved heat resistance, and improved high-temperature adhesive force

Active Publication Date: 2021-07-13
NANJING TSINGSHANG ADVANCED MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the technology of cold seal adhesives is mainly in the hands of Japan, and has applied for many related patents in China, such as the Chinese patent CN201080007840.0 "Temperature-sensitive adhesive and temperature-sensitive adhesive tape", which uses metal The chelate compound forms a coordination bond with the side-chain crystalline polymer, thereby improving the heat resistance of the adhesive. The effect of this patent is limited only by the coordination bond; patent CN201210376120.2 "Adhesive Composition and Adhesive "Tape", in the presence of polyurethane (meth)acrylate, UV irradiation is carried out on the monomer mixture containing (meth)acrylate and (meth)acrylamide compounds to form a certain cross-linking system in the system, Improve cohesion, thereby improving heat resistance. UV curing is a transient reaction. It is easy to make the monomer concentration uneven during crosslinking, resulting in uneven surface viscosity of the adhesive tape.

Method used

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  • A kind of cold seal adhesive and its preparation method and a kind of preparation method of adhesive tape
  • A kind of cold seal adhesive and its preparation method and a kind of preparation method of adhesive tape
  • A kind of cold seal adhesive and its preparation method and a kind of preparation method of adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A cold-sealing adhesive, comprising the following raw materials in parts by mass:

[0025]

[0026] A kind of preparation method of cold seal type adhesive, comprises the following steps:

[0027] Step 1, add 20 parts of behenyl methacrylate, 40 parts of methyl methacrylate and 3 parts of methacrylic acid in 20 parts of toluene, and stir evenly in N2 bubbling, add 0.1 part of initiator Oxidize benzoyl to obtain a crystalline prepolymer with a side chain;

[0028] Step 2: Add 8 parts of bifunctional polymer and 2 parts of hexamethylene diisocyanate curing agent to the crystalline prepolymer with side chains prepared in Step 1, and stir well to obtain the cold-seal adhesive mixture.

[0029] The hydroxyl value of the bifunctional polymer is 35 mg KOH / g, and the molecular weight is below 5000.

[0030] An adhesive tape made of cold seal adhesive, made by the following method: add 1 part of 2,2-diethoxybenzophenone to the adhesive in the dark, mix it evenly Coated on...

Embodiment 2

[0032] A cold-sealing adhesive, comprising the following raw materials in parts by mass:

[0033]

[0034] A kind of preparation method of cold seal type adhesive, comprises the following steps:

[0035] Step 1, add 30 parts of stearyl methacrylate, 40 parts of methyl methacrylate and 5 parts of (meth)acrylic acid-2-2 hydroxypropyl ester in 20 parts of toluene, and stir in N2 bubbling Evenly, add 0.1 part of initiator azobisisobutyronitrile to obtain a crystalline prepolymer with a side chain;

[0036] Step 2: Add 10 parts of bifunctional polymer and 2.5 parts of toluene diisocyanate curing agent to the crystalline prepolymer with side chains prepared in Step 1, and stir thoroughly to obtain a cold-close adhesive.

[0037] The hydroxyl value of the bifunctional polymer is 30 mg KOH / g, and the molecular weight is below 5000.

[0038] A kind of adhesive tape made of cold seal adhesive is made by the following method: add 0.2 part of photoinitiator TPO and 0.1 part of photoi...

Embodiment 3

[0040] A cold-sealing adhesive, comprising the following raw materials in parts by mass:

[0041]

[0042] A kind of preparation method of cold seal type adhesive, comprises the following steps:

[0043] Step 1, add 30 parts of myristyl methacrylate, 60 parts of ethyl methacrylate and 5 parts of (meth)acrylic acid-2-2 hydroxypropyl ester in 20 parts of toluene, and stir in N2 bubbling Evenly, add 0.15 parts of initiator azobisisobutyronitrile to obtain a crystalline prepolymer with a side chain;

[0044] Step 2: Add 8 parts of bifunctional polymer and 8 parts of toluene diisocyanate curing agent to the crystalline prepolymer with side chains prepared in Step 1, and stir thoroughly to obtain a cold-close adhesive.

[0045] The hydroxyl value of the bifunctional polymer is 35 mg KOH / g, and the molecular weight is below 5000.

[0046] A kind of adhesive tape made of cold seal adhesive is made by the following method: add 0.15 parts of photoinitiator TPO to the adhesive in th...

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Abstract

The present invention relates to a kind of cold seal type adhesive and its preparation method and a kind of preparation method of adhesive tape, comprise the linear alkyl (meth)acrylic acid ester of carbon number 14 or more, carbon number 1-6 Alkyl (meth)acrylates, polar monomers, copolymerization initiators, bifunctional polymers and isocyanate crosslinking agents. The adhesive tape is prepared by adding linear alkyl (meth)acrylates with 14 or more carbon atoms, alkyl (meth)acrylates with 1-6 carbon atoms, and polar monomers to toluene. , and N 2 Stir evenly in bubbling, add a copolymerization initiator to obtain a crystalline prepolymer with side chains, add a bifunctional polymer and an isocyanate crosslinking agent to the above system, and stir evenly to obtain an adhesive. Add a photoinitiator to avoid sunlight, mix it evenly, and apply it on the base film. After drying and heat-setting treatment, it is irradiated with ultraviolet rays to make an adhesive tape. The invention has the advantages of good heat resistance, strong adhesive force and the like.

Description

technical field [0001] The invention relates to a temperature-sensitive adhesive, in particular to a cold-close adhesive, a preparation method thereof, and a preparation method of an adhesive tape. Background technique [0002] The main feature of the cold seal adhesive is that when the temperature is lower than the melting point of the side chain crystalline polymer, crystallization occurs, showing low viscosity; when the temperature is higher than the melting point, a phase change occurs and shows fluidity, bonding force recovery. This adhesive can be reused according to temperature changes. In the fields of electronic components, semiconductor wafers, liquid crystals, etc., it has important applications for temporarily fixing components. [0003] At present, the technology of cold seal adhesives is mainly in the hands of Japan, and has applied for many related patents in China, such as the Chinese patent CN201080007840.0 "Temperature-sensitive adhesive and temperature-s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/08C09J7/30
CPCC09J133/066C09J133/08C09J2433/00C09J2467/006C09J2475/00C09J7/30C09J2301/122C08L75/14
Inventor 董村东赵朋陈坤
Owner NANJING TSINGSHANG ADVANCED MATERIALS TECH CO LTD
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