Vinyl perfluorinated polyethylene glycol modified elastic polyurethane and application thereof
A polyethylene glycol modified, elastic polyurethane technology, applied in the field of polyurethane, can solve the problem of peeling off the release layer, and achieve the effects of increasing bonding, improving impact resistance, and easy peeling
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Embodiment 1
[0021] A vinyl-containing perfluoropolyethylene glycol modified elastic polyurethane X, in parts by weight, the preparation method of which is:
[0022] Under the protection of nitrogen, add 54 parts of isopentenyl perfluoropolyethylene glycol, 9 parts of MDI, and 18 parts of acetone into the reactor, start stirring to stir the materials evenly, and heat to 78 ° C for 3 hours; then drop by drop Add 0.10 parts of stannous octoate, continue to react at 78°C for 2 hours after the dropwise addition, measure the percentage of -NCO in the system every 0.5 hours during the reaction, when the system reaches the target -NCO percentage of less than 0.5%, cool down to room temperature, Then, the organic solvent is removed by distillation under reduced pressure, and the vinyl-containing perfluoropolyethylene glycol-modified elastic polyurethane X is obtained.
Embodiment 2
[0024] A smooth and elastic silicone release agent is characterized in that its formula consists of the following parts by weight: containing vinyl perfluoropolyethylene glycol modified elastic polyurethane X30 parts, vinyl-terminated polysiloxane Alkanes (viscosity is 5000cp, vinyl content is 0.04%) 80 parts, hydrogen-containing polysiloxane (viscosity is 50cp, hydrogen content is 0.3%) 12 parts, ethylene glycol diglycidyl ester 2 parts, vinyl tris - 3 parts of (β-methoxyethoxy) silane, 2 parts of chloroplatinic acid-divinyltetramethyldisiloxane.
Embodiment 3
[0026] A smooth and elastic silicone release agent is characterized in that its formula consists of the following parts by weight: containing vinyl perfluoropolyethylene glycol modified elastic polyurethane X20 parts, vinyl-terminated polysiloxane 100 parts of alkane (viscosity of 20000cp, vinyl content of 0.01%), 6 parts of hydrogen-containing polysiloxane (viscosity of 20cp, hydrogen content of 1.2%), 4,5-epoxycyclohexane-1,2 - 4 parts of diglycidyl dicarboxylate, 1 part of γ-(methacryloyloxy)propyltrimethoxysilane, 10 parts of chloroplatinic acid-diethyl phthalate.
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