Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Light-curable polyurethane-poly(methyl) acrylate pressure-sensitive polymer and preparation method thereof

A technology of acrylate and hydroxyacrylate, which is applied in the field of polyurethane polyacrylate pressure-sensitive polymer and its preparation method, can solve problems such as internal stress cannot be released, bonded materials fall off, and affect the use of pressure-sensitive adhesives, etc., to achieve excellent Flexibility and low shrinkage, good elasticity, excellent dilution effect

Active Publication Date: 2014-02-05
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because acrylate polymers generally have a chain-like linear structure, they are extremely sensitive to temperature, and will gradually become soft and sticky as the temperature rises; when the temperature drops to a certain limit, they will gradually become brittle, have poor weather resistance, and have a large shrinkage rate. Interface is selective and performs poorly when used alone
Therefore, thickeners, softeners, and some additives to increase cohesion are often added during use, and additives are generally small molecules, which are easy to separate out from the polymer when physically mixed with acrylate polymers, and small molecules that increase cohesion The additive shrinks seriously during curing, which affects the use of pressure-sensitive adhesives
[0005] (2) The fillers added to improve the cohesion of pressure-sensitive adhesives are usually small molecular monomers, and the volume shrinks during the curing process. During this process, the molecular chains are quickly frozen and do not stack to the state of the lowest position energy; If the thickness of the adhesive layer is uneven or the hardness is too high, the internal stress generated by the shrinkage cannot be released, causing some industries to use pressure-sensitive adhesives to often appear white after curing, until the bonded materials fall off
[0006] (3) The pressure-sensitive adhesive industry often adopts thermal curing and hot melting methods in the production, which consumes a lot of energy and has low efficiency.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Light-curable polyurethane-poly(methyl) acrylate pressure-sensitive polymer and preparation method thereof
  • Light-curable polyurethane-poly(methyl) acrylate pressure-sensitive polymer and preparation method thereof
  • Light-curable polyurethane-poly(methyl) acrylate pressure-sensitive polymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: Preparation of photocurable polyurethane polymethacrylate pressure-sensitive polymer S1

[0037] (1) Add 100 parts by weight of polyether diol that has been dehydrated into a reactor equipped with a stirrer and a thermometer, mechanically stir at a speed of 300r / min and heat to 60°C, then add 14 parts by weight of toluene diisocyanate , mixed evenly under stirring conditions, and reacted for 4 hours to obtain a polyurethane prepolymer with -NCO- at both ends; then added 1.5 parts by weight of diethylamine to single-end -NCO-, continued to react for 4 hours, and then took a sample Test, its infrared spectrogram results show that part of the diethylamine-terminated polyurethane macromonomer has been obtained.

[0038] (2) Add 200 parts by weight of cyclohexanone, 8 parts by weight of hydroxyethyl methacrylate (HEMA), 10 parts by weight of glycidyl methacrylate (GMA), and 82 parts by weight of oxyethoxyethyl acrylate and 1.6 parts by weight of azobisisobutylcya...

Embodiment 2

[0044] Example 2: Preparation of photocurable polyurethane polyacrylate pressure-sensitive polymer S2

[0045] (1) Add 100 parts by weight of polyether diol that has been dehydrated into a reactor equipped with a stirrer and a thermometer, stir and heat to 80°C, then add 40 parts by weight of diphenylmethane diisocyanate, at 350r / The rotating speed of min is mechanically stirred and mixed evenly. After 5 hours of reaction, a polyurethane prepolymer with -NCO- at both ends is obtained; then 3 parts by weight of dipropylamine is added to single-end the -NCO-, and the reaction is continued for 4 hours. After the sample is tested, Its infrared spectrogram results show that at 3335cm -1 The -NH- stretching vibration peak appeared at 1730cm -1 The carbonyl stretching vibration peak appeared at , indicating that the isocyanate group of diphenylmethane diisocyanate reacted with the hydroxyl group of polyether diol, 3650cm -1 The O-H stretching vibration peak disappears, indicating ...

Embodiment 3

[0050] Example 3: Preparation of photocurable polyurethane polyacrylate pressure-sensitive polymer S3

[0051] (1) Add 100 parts by weight of polyether diol that has been dehydrated into a reactor equipped with a stirrer and a thermometer, stir and heat to 70°C, then add 10 parts by weight of xylylene diisocyanate, and heat at 300r / min speed mechanically stirred and mixed evenly, after 2 hours of reaction to obtain a polyurethane prepolymer with -NCO- at both ends; then add 1 weight part of dibutylamine to single-end -NCO-, continue to react for 4 hours and then take samples Test, its infrared spectrum results show that at 3335cm -1 The -NH- stretching vibration peak appeared at 1730cm -1 The carbonyl stretching vibration peak appeared at , indicating that the isocyanate group of xylylene diisocyanate reacted with the hydroxyl group of polyether diol, 3650cm -1 The O-H stretching vibration peak disappears, indicating that some dibutylamine-terminated polyurethane macromonom...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
peel strengthaaaaaaaaaa
peel strengthaaaaaaaaaa
peel strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a light-curable polyurethane-poly(methyl) acrylate pressure-sensitive polymer and a preparation method thereof. The preparation method for the light-curable polyurethane-poly(methyl) acrylate pressure-sensitive polymer comprises the following steps: heating 10 to 90 parts by weight of a polyurethane macromonomer and 10 to 90 parts by weight of a (methyl)acrylate macromonomer to a temperature of 60 to 75 DEG C under the action of a catalyst B and carrying out a reaction for 4 to 5 h so as to obtain the light-curable polyurethane-poly(methyl) acrylate pressure-sensitive polymer. The structure of the light-curable polyurethane-poly(methyl) acrylate pressure-sensitive polymer combines the advantages of polyurethane and poly(methyl) acrylate into one; meanwhile, an introduced ethoxy structure improves fluidity of the polymer and reduces shrinkage, which is beneficial for uniform coating of the polymer during production of a pressure-sensitive adhesive, and low shrinkage can guarantee stability of the pressure-sensitive adhesive and prolongs the service life of the pressure-sensitive adhesive.

Description

technical field [0001] The invention belongs to the field of adhesives, and in particular relates to a light-curable polyurethane poly(meth)acrylate pressure-sensitive polymer and a preparation method thereof. Background technique [0002] UV curing material has a very high curing rate, does not contain solvent or a small amount of inert diluent, and does not need to be heated during curing, so it has the characteristics of low pollution, low energy consumption, high efficiency, and wide applicability. It has been widely used in recent years New building materials, metal electronic component packaging, optical fiber coating and bonding and other fields. Pressure-sensitive adhesives are referred to as pressure-sensitive adhesives for short. They are easy to use and generally do not affect the surface of the adherend after being peeled off. They are a type of adhesives that are widely used. [0003] Pressure-sensitive adhesives need to have proper viscosity and elasticity aga...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/78C08G18/62C08G18/48C08F220/28C08F220/32C08F220/06C09J175/04C09J7/02
CPCC08F8/14C08F220/28C08F220/285C08F2810/30C08G18/10C08G18/4825C08G81/02C08G2170/40C08G18/287C08F220/281C08F220/325
Inventor 刘伟区王红蕾闫振龙苏奎夏侯国伦
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com