Polyacrylate, acrylic foam composition, acrylic foam adhesive tape as well as preparation methods and applications thereof

Abstract

The invention relates to polyacrylate, an acrylic foam composition, an acrylic foam adhesive tape as well as preparation methods and application thereof. The polyacrylate comprises the following raw material components in parts by weight: 10-30 parts of a soft monomer; 5-20 parts of a hard monomer; 2-8 parts of a functional monomer; 5-10 parts of a low-surface-energy monomer; 40 to 70 parts of a solvent; and 0.1-0.6 part of a free radical initiator. The acrylic foam composition comprises the following raw material components in parts by weight: 30-50 parts of the polyacrylate; 50 to 70 parts of a solvent; 0.5-1 part of a curing agent; 0.5 to 2 parts of foaming microspheres; 0.1 to 0.6 part of a dispersant; and 1-5 parts of carbon black. The acrylic foam adhesive tape is soft, has random adhesion, has weak viscosity and adsorbability itself, can temporarily fix and repeatedly attach a smooth plane, and can absorb impact force, so that an OLED is not liable to crack due to collision or falling.

Description

technical field [0001] The invention relates to a polyacrylate, an acrylic foam composition, an acrylic foam adhesive tape, a preparation method and an application thereof. Background technique [0002] With the development of science and technology, people's life is inseparable from electronic display devices, such as mobile phones, computers, etc. These electronic devices are easy to bump and fall during use, so it is necessary to paste a layer of buffer under the screen OLED frame of these electronic devices Material foam (such as PE foam, EVA foam, PU foam) to absorb the impact of the outside world on it. [0003] Existing acrylate foam technology (CN106674417): an acrylic foam tape composition and a method for preparing the acrylic foam tape, including a foam substrate layer and tape layers on both sides of the foam substrate layer; The foam substrate layer is uniformly mixed physically with acrylate monomers, reaction aids, bridging agents, porous fillers and additive...

AI Technical Summary

Problems solved by technology

[0008] It can be seen that the existing foam tape production process is to select pre-foamed substrates such as PE, EVA, PU, ​​and then apply adhesives on both sides of these substrates. This method is complicated to process and high in cost. Thick, it is no longer suitable for increasingly thinner electronic products such as mobile phones, and the pores of the pre-foamed substrate are uneven, and the shockproof effect is not good

[0009] In addition, the existing foam tapes are usually made by ultraviolet light irradiation and thermal polymerization. When the thickness of the foam is thick, the sufficiency of ultraviolet irradiation is affected. demanding questions

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