US 2025/0019574 A1 · SECONDARY CURED UV PRESSURE-SENSITIVE ADHESIVE, AND PREPARATION METHODS FOR SAME AND EXPLOSION-PROOF FILM

Abstract

Provided are a secondary cured UV pressure-sensitive adhesive, and preparation methods for same and an explosion-proof film. The secondary cured UV pressure-sensitive adhesive is composed of the following materials, in percentages by mass: 31-35% of a hydroxyl-containing polyacrylate prepolymer, 6-9% of pentaerythritol triacrylate, 3-5% of 2-hydroxyl-3-phenoxy propane acrylate, 2-3% of an isocyanate curing agent, 2-3% of photo initiator 184, and 50% of ethyl acetate. The secondary cured UV pressure-sensitive adhesive is prepared by carrying out a thermal curing cross-linking reaction of a hydroxyl-containing polyacrylate prepolymer, pentaerythritol triacrylate and 2-hydroxyl-3-phenoxy propane acrylate by using an isocyanate curing agent, and initiating a free radical polymerization of pentaerythritol triacrylate and 2-hydroxyl-3-phenoxy propane acrylate by using photo initiator 184.

Claims12

Dependent claims

A secondary cured UV pressure-sensitive adhesive, composed of following mass percent contents of materials:

a hydroxyl-containing polyacrylate prepolymer
31-35%,
pentaerythritol triacrylate
6-9%,
2-hydroxyl-3-phenoxy propane acrylate
3-5%,
an isocyanate curing agent
2-3%,
photo initiator 184
2-3%, and
ethyl acetate
50%, wherein
a cross-linking and curing of the UV pressure-sensitive adhesive is accomplished by following steps:
firstly, a thermal curing cross-linking reaction between the hydroxyl-containing polyacrylate prepolymer, pentaerythritol triacrylate and 2-hydroxyl-3-phenoxy propane acrylate is carried out by using the isocyanate curing agent, to form an interpenetrating network structure;
and secondly, under UV irradiation, a free radical polymerization of pentaerythritol triacrylate and 2-hydroxyl-3-phenoxy propane acrylate is initiated by using photo initiator 184, to complete a photo-curing cross-linking reaction.

12 more elements

A preparation method for a secondary cured UV pressure-sensitive adhesive, wherein the method comprises following steps

1) synthesis of a hydroxyl-containing polyacrylate prepolymer, comprising:
according to weight parts, weighing 20 to 23 parts of n-butyl acrylate, 10 to 13 parts of tetrahydrofurfuryl acrylate, 8 to 10 parts of hydroxyethyl acrylate, 3 to 4 parts of acrylic acid, 3 to 4 parts of benzoyl peroxide, respectively;
adding them to a four-neck flask, and mixing them evenly with 50 parts of ethyl acetate;
and subjecting a resultant to random copolymerization using a free radical polymerization process to obtain the hydroxyl-containing polyacrylate prepolymer;
and
2) preparation of the secondary cured UV pressure-sensitive adhesive, comprising:
according to mass percent content, weighing the hydroxyl-containing polyacrylate prepolymer at 31%˜35%, pentaerythritol triacrylate at 6%˜9%, 2-hydroxyl-3-phenoxy propane acrylate at 3%˜5%, isocyanate curing agent at 2%˜3%, photo initiator 184 at 2%˜3%, and ethyl acetate at 50%, respectively;
and in a light-shielded environment, uniformly dispersing and stirring after contained in a black container to obtain the secondary cured UV pressure-sensitive adhesive.

5 more elements

Dependencies are inferred from the claim text.

Secondary cured uv pressure-sensitive adhesive, and preparation methods for same and explosion-proof film

Life of this patent

Secondary cured uv pressure-sensitive adhesive, and preparation methods for same and explosion-proof film

Life of this patent

Abstract

Claims12