Halogen-free flame-retardant UV-cured acrylate pressure-sensitive adhesive and pressure-sensitive adhesive tape, and preparation method thereof

An acrylate, pressure-sensitive tape technology, used in pressure-sensitive films/sheets, adhesives, non-polymer organic compound adhesives, etc. Problems such as low adhesive holding force and initial adhesion force, poor compatibility between flame retardants and pressure-sensitive adhesives, etc., achieve the effects of controllable mechanical properties, low cost, and low environmental pollution

Active Publication Date: 2020-01-07
湖南省和祥润新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the compatibility between flame retardants and pressure-sensitive adhesives is poor, and the rigid groups of flame retardants are too large, resulting in low adhesion and initial adhesion of pressure-sensitive adhesives.
And there may be harmful solvents left in the system
[0008] In summary, the existing problems of flame-retardant acrylate pressure-sensitive adhesives mainly include: although the pressure-sensitive adhesives containing halogen flame retardants have high flame-retardant grades, their application range is greatly limited; The flame retardant has poor compatibility with the pressure-sensitive adhesive, which will damage the cohesion, initial adhesion and peel strength of the pressure-sensitive adhesive; although the halogen-free reactive flame retardant can participate in the polymerization reaction of the monomer to form a copolymer, phosphorus and nitrogen elements Low content, poor flame retardant effect

Method used

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  • Halogen-free flame-retardant UV-cured acrylate pressure-sensitive adhesive and pressure-sensitive adhesive tape, and preparation method thereof
  • Halogen-free flame-retardant UV-cured acrylate pressure-sensitive adhesive and pressure-sensitive adhesive tape, and preparation method thereof
  • Halogen-free flame-retardant UV-cured acrylate pressure-sensitive adhesive and pressure-sensitive adhesive tape, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for preparing a halogen-free flame-retardant UV-curable acrylate pressure-sensitive adhesive and a pressure-sensitive adhesive tape according to an embodiment of the present invention, comprising the following steps:

[0033] (1) Preparation of acrylate prepolymer

[0034]According to 85 parts by weight of isooctyl acrylate, 5 parts by weight of acrylic acid, 10 parts by weight of isobornyl acrylate and 0.05 parts by weight of the first photoinitiator (TPO, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide) The parts are mixed evenly, and the polymerization reaction occurs under UV light under a nitrogen atmosphere. When the viscosity of the system reaches 450mPa.s-600mPa.s, the reaction is terminated by feeding oxygen to obtain an acrylate prepolymer;

[0035] (2) Preparation of pressure-sensitive adhesive

[0036] Add 15 parts by weight of the flame retardant dimethyl methylphosphonate (DMMP) and 2 parts by weight of silicon dioxide to the acrylate prepolymer p...

Embodiment 2

[0042] The preparation method of this embodiment is roughly the same as that of Example 1, except that the amounts of dimethyl methylphosphonate and silicon dioxide are different from those of Example 1. In this embodiment, the amount of dimethyl methylphosphonate is 20 parts by weight, and the amount of silicon dioxide is 1 part by weight.

[0043] Cut the pressure-sensitive tape sample obtained after the coating film in this example is cured and save it in strips. Test the 180° peel strength of the strip on an electronic tensile machine according to the GB / T 2792-2014 standard, and test it on a horizontal and vertical burning instrument according to the UL94-2006 standard. The flame retardant grade of the test rubber strip. The test results are shown in Table 1.

Embodiment 3

[0045] The preparation method of this example is roughly the same as that of Example 1, the main difference is that 20 parts by weight of dimethyl methylphosphonate and 0.8 parts by weight of silicon dioxide are used as the flame retardant.

[0046] Cut the pressure-sensitive tape sample obtained after the coating film in this example is cured and save it in strips. Test the 180° peel strength of the strip on an electronic tensile machine according to the GB / T 2792-2014 standard, and test it on a horizontal and vertical burning instrument according to the UL94-2006 standard. The flame retardant grade of the test rubber strip. The test results are shown in Table 1.

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Abstract

The invention discloses a halogen-free flame-retardant UV-cured acrylate pressure-sensitive adhesive and a pressure-sensitive adhesive tape, and a preparation method thereof. The halogen-free flame-retardant UV-cured acrylate pressure-sensitive adhesive comprises the following raw materials in parts by weight: 100 parts of an acrylate prepolymer, 15 to 20 parts of dimethyl methylphosphonate, 0.8 to 2 parts of silicon dioxide, 0.2 to 0.25 part of a cross-linking agent, 2.5 to 3.35 parts of tackifying resin, and 0.5 to 1 part of a second photoinitiator. The pressure-sensitive adhesive tape formed by the halogen-free flame-retardant UV-cured acrylate pressure-sensitive adhesive is good in flame-retardant effect, excellent in pressure-sensitive adhesive property and wide in application range.

Description

technical field [0001] The invention relates to the technical field of ultraviolet light-curable pressure-sensitive adhesives, in particular to a halogen-free flame-retardant UV-curable acrylate pressure-sensitive adhesive, a pressure-sensitive adhesive tape and a preparation method thereof. Background technique [0002] Acrylic pressure-sensitive adhesive is a material with viscoelastic properties, which has good wettability to the surface of various substrates. It does not contain unsaturated double bonds, so it has excellent aging resistance. And after it is peeled off, no residual glue is left on the surface of the substrate. At present, it has been widely used in packaging, automobile, electronic communication, medicine, construction, personal care and other industries. As the third-generation acrylate pressure-sensitive adhesive, UV-curable acrylate pressure-sensitive adhesive has unique characteristics: no solvent, low energy consumption, little pollution, easy react...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/02C09J4/06C09J11/04C09J11/06C09J11/08C09J7/38C09J7/25
CPCC09J4/06C09J11/04C09J11/06C09J11/08C09J2467/006C09J7/255C09J7/381C09J2301/122
Inventor 刘星林晓丹廖平湘
Owner 湖南省和祥润新材料有限公司
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