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

Inactive Publication Date: 2021-05-14
刘鹏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, it is known that crimping is applied to the center of the wound body, but there is also a problem that the release layer of the adhesive material is peeled off by applying the crimping pressure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention relates to vinyl perfluorinated polyethylene glycol modified elastic polyurethane which is characterized in that a preparation method of the vinyl perfluorinated polyethylene glycol modified elastic polyurethane comprises the following steps: adding 50-60 parts by weight of vinyl-containing perfluorinated polyethylene glycol, 6-14 parts by weight of diisocyanate monomer and 12-25 parts by weight of organic solvent into a reactor under the protection of nitrogen, starting stirring to uniformly stir the materials, and heating to 60-90 DEG C and reacting for 2-3 hours; and adding the perfluoropolyethylene glycol into a reaction kettle, reacting at 60-90 DEG C for 1-2 hours, then dropwise adding 0.05-0.15 part of a catalyst, continuously reacting at 60-90 DEG C for 1-2 hours after dropwise adding, measuring the percentage content of -NCO in the system every 0.5 hour in the reaction process, cooling to room temperature when the percentage content of the target -NCO in the system is less than 0.5%, and then removing the organic solvent through reduced pressure distillation to obtain the vinyl-containing perfluoropolyethylene glycol modified elastic polyurethane. The smooth and elastic organic silicon release agent prepared from the polyurethane can be tightly adhered to glassine paper, and has the advantage of being easier to peel.

Description

technical field [0001] The invention belongs to the technical field of polyurethane, and relates to a vinyl perfluoropolyethylene glycol modified elastic polyurethane and an application thereof. Background technique [0002] The release agent composition is coated on the surface of various substrates such as paper, synthetic resin film, synthetic fiber, or cloth, and cured to form a cured layer, thereby forming an adhesive substance such as a pressure-sensitive adhesive. Peelable film. As such a release agent composition, one containing an organopolysiloxane having a fluorine atom-containing siloxane unit is known. Silicone coating is currently an important direction in the field of anti-fouling coatings. Because of its low surface tension, transparency, non-toxicity, high temperature resistance, and good weather resistance, it is widely used on the surface of metals, ceramics, paper, plastics, and textiles. Use as anti-fouling or anti-stick coating. [0003] However, alt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C09D183/07C09D175/14C09D183/05C09D7/63C09D5/20C09J7/40
CPCC09D183/04C08L2205/03C08L2205/025C09J7/401C09J2483/005C09D7/63C09D5/20D21H19/32D21H19/24D21H27/001C08L83/04C08L75/14C08K5/5425
Inventor 刘鹏
Owner 刘鹏
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