Optical adhesive with low gel fraction and preparation method thereof
An optical adhesive, low-gel technology, used in adhesives, adhesive types, ester copolymer adhesives, etc., can solve the problem of uncontrollable and accurate control of the gel fraction of optical adhesives, etc. question
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[0013] A method for preparing an optical adhesive with a low gel fraction, comprising the steps of:
[0014] Step 1: Mix 0-80 parts of isooctyl acrylate, 0-30 parts of hydroxyethyl acrylate, 0-15 parts of isobornyl acrylate, 0-5 parts of isocyanate ethyl acrylate and 0-0.5 parts of light The initiator is mixed to obtain an optical prepolymer;
[0015] Step 2: adding 0-1 part of multifunctional monomer to the optical prepolymer obtained in step 1, coating on the base film, and then irradiating with UV light;
[0016] Step 3: irradiating and reacting the coated base film under UV light to obtain an optical adhesive film.
[0017] Step 4: heat the coated optical adhesive film at 40-120°C for 12h-72h to carry out deep curing and cross-linking.
Embodiment 1
[0019] An optical adhesive with a low gel fraction, consisting of the following substances in parts by mass: 80 parts of isooctyl acrylate, 10 parts of hydroxyethyl acrylate, 10 parts of isobornyl acrylate and 0.5 parts of 1-hydroxy - cyclohexylbenzophenone.
[0020] A method for preparing an optical adhesive with a low gel fraction, comprising the steps of:
[0021] Step 1: Mix 80 parts of isooctyl acrylate, 10 parts of hydroxyethyl acrylate, 10 parts of isobornyl acrylate, and 0.5 parts of 1-hydroxy-cyclohexylbenzophenone to obtain an optical prepolymer;
[0022] Step 2: adding 0.2 parts of (2,4,6-trimethylbenzoyl)phenylphosphine oxide into the optical prepolymer, coating on the base film, and then irradiating with UV light;
[0023] Step 3: irradiating the coated base film under UV light, reacting and curing to obtain an optical adhesive film.
[0024] Step 4: heat the coated optical adhesive film at 100° C. for 70 hours to perform deep curing and cross-linking.
Embodiment 2
[0026] An optical adhesive with a low gel fraction, consisting of the following substances in parts by mass: 80 parts of isooctyl acrylate, 10 parts of hydroxyethyl acrylate, 10 parts of isobornyl acrylate, 0.1 part of isocyanate acrylic acid ethyl ester and 0.5 parts of 1-hydroxy-cyclohexylbenzophenone.
[0027] A method for preparing an optical adhesive with a low gel fraction, comprising the steps of:
[0028] Step 1: Mix 80 parts of isooctyl acrylate, 10 parts of hydroxyethyl acrylate, 10 parts of isobornyl acrylate and 0.5 parts of 1-hydroxyl-cyclohexylbenzophenone to obtain a low gel fraction optical adhesive mixture;
[0029] Step 2: Add 0.2 parts by mass of (2,4,6-trimethylbenzoyl) phenylphosphine oxide and 0.05 parts of trimethylolpropane triacrylate into the adhesive, on the base film Coating is carried out, followed by UV light irradiation;
[0030] Step 3: irradiating the coated base film under UV light, reacting and curing to obtain an optical adhesive film.
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