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Acrylic acid emulsion and functional acrylic acid emulsion for unshadowed protective film

An acrylic emulsion and acrylate technology, applied in the direction of film/sheet adhesive, adhesive type, adhesive additive, etc., can solve the problems of poor applicability, gel, restriction, etc., to improve heat resistance and Corrosion resistance, high crosslink density and cohesive strength, shadow reduction effect

Inactive Publication Date: 2013-01-16
南京夜视丽精细化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Chinese patent CN1517422A discloses the composition and preparation method of a peelable emulsion pressure-sensitive adhesive, which adds a water-dispersible polyisocyanate crosslinking agent to the acrylic emulsion containing hydroxyl groups, and the adhesive products obtained have good Heat resistance, it can be used on a variety of substrates without any residual glue, but the reaction between a large amount of water and water-dispersible polyisocyanate in the emulsion reduces the cross-linking efficiency of the cross-linking agent, and it is very easy to add a cross-linking agent Gel phenomenon occurs during stirring and storage, poor applicability
[0009] Zhou Bo’s Nanjing Forestry University master’s thesis "Research and Application of Emulsion Pressure Sensitive Adhesive for Protective Film" studies the influence of various process conditions on the performance of acrylic emulsion adhesives, and uses internal crosslinking agents, external linking agents, reactive emulsifiers, etc. to improve acrylic emulsion, and studied the application of acrylic emulsion on the surface protective film of stainless steel plate and aluminum-plastic plate, but it did not analyze and solve the problem of water-resistant whitening of the protective film, and the prepared protective film can only withstand 80°C for four hours, making it The application on stainless steel mirror panels is limited, and the heat resistance and water whitening resistance need to be improved
[0010] In summary, there have been many reports on the patents of acrylic pressure-sensitive adhesives for protective films, but there have been no reports on the application of acrylic emulsion pressure-sensitive adhesives for shadow-free protective films on high-gloss stainless steel mirror panels.

Method used

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  • Acrylic acid emulsion and functional acrylic acid emulsion for unshadowed protective film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Weigh 35.2 parts of butyl acrylate, 39.8 parts of isooctyl acrylate, 6 parts of methyl methacrylate, 3 parts of hydroxyethyl acrylate, 10.1 parts of ethyl acrylate, 1.9 parts of methyl acrylate, and 2 parts of maleic acid. 2 parts of N-methylol acrylamide, 0.5 parts of ammonium persulfate, 2.0 parts of 2-acrylamido-2-methyl-propenesulfonic acid, 40 parts of deionized water, deionized water, 2-acrylamido- Add 2-methyl-propenesulfonic acid and ammonium persulfate to the pre-emulsification kettle and stir evenly; then add the weighed comonomer to the pre-emulsification kettle, and stir quickly for 0.5 hours to form a pre-emulsion solution, which is reduced for use. Add 85 parts of deionized water, 0.3 parts of 2-acrylamido-2-methyl-propenesulfonic acid, and 10% pre-emulsion into the reactor, start stirring, heat up to 82°C, keep for 30 minutes, and react to form seeds Emulsion, then drip the remaining pre-emulsion in about 5 hours, keep it for 30 minutes, and finally add 0....

Embodiment 2

[0044] Weigh 38 parts of butyl acrylate, 31 parts of isooctyl acrylate, 8 parts of lauryl acrylate, 6 parts of methyl methacrylate, 8 parts of ethyl acrylate, 4 parts of methyl acrylate, and 5 parts of maleic acid. 0.3 parts of hydrogen oxide, 0.3 parts of sodium formaldehyde sulfoxylate, 2.2 parts of allyloxy nonylphenol polyoxyethylene ether bisphosphonic acid, 40 parts of deionized water, deionized water, allyloxy nonylphenol polyoxygen Vinyl ether bisphosphoric acid and hydrogen peroxide, sodium formaldehyde sulfoxylate hydrogen sulfate are added to the pre-emulsification kettle and quickly stirred uniformly; then the weighed mixed monomer is added to the pre-emulsification kettle, and the pre-emulsion is formed after rapid stirring for 0.5h. Reduce speed for use, add 85 parts of deionized water, 0.2 parts of allyloxy nonylphenol polyoxyethylene ether bisphosphonic acid, 8% pre-emulsion to the reactor, start stirring, heat up to 82°C, keep for 30 minutes, and react to form s...

Embodiment 3

[0046] Weigh 10.3 parts of butyl acrylate, 40 parts of isooctyl acrylate, 8 parts of tridecyl acrylate, 9 parts of methyl methacrylate, 15 parts of hydroxypropyl acrylate, 8 parts of ethyl acrylate, and butyl methacrylate 4.7 parts, 3.2 parts of maleic acid, 1 part of N-methylolacrylamide, 0.8 parts of acrylamide, 0.4 parts of tert-butyl hydroperoxide, 0.3 parts of sodium formaldehyde sulfoxylate, allyloxynonyl 1.8 parts of phenol polyoxyethylene ether ammonium sulfate, 40 parts of deionized water, add deionized water, tert-butyl hydroperoxide, sodium formaldehyde sulfoxylate and allyloxy nonylphenol polyoxyethylene ether ammonium sulfate to In the pre-emulsification kettle, quickly stir uniformly; then add the weighed mixed monomers to the pre-emulsification kettle, and quickly stir for 0.5h to form a pre-emulsion liquid, slow down for use, add 85 parts of deionized water and 0.4 parts of emulsification to the reactor 7% pre-emulsion liquid, start stirring, heat to 82℃, keep f...

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Abstract

The invention relates to acrylic acid emulsion and functional acrylic acid emulsion for an unshadowed protective film comprising the same. The acrylic acid emulsion is compounded with an external cross-linking agent to obtain the functional acrylic acid emulsion for the unshadowed protective film which can be applied to a high-finish stainless steel mirror board to form the unshadowed protective film. A preparation method of the acrylic acid emulsion comprises the following steps of: 1) performing polymerization on a functional monomer and an acrylic ester monomer by pre-emulsification and seeding polymerization processes to prepare an acrylic ester polymer, wherein a comonomer comprises the following components in percentage by weight: 5 to 20 percent of the functional monomer, 5 to 10 percent of hard acrylic ester monomer, 10 to 20 percent of medium soft acrylic ester monomer and 50 to 80 percent of soft acrylic ester monomer; Tg of the hard acrylic ester monomer is more than or equal to 36 DEG C; Tg of the medium soft acrylic ester monomer is between 35 and -25 DEG C; and Tg of the soft acrylic ester monomer is less than or equal to -24 DEG C; and 2) adjusting the pH value of the polymer emulsion prepared in the step 1) to be alkalescent to obtain the acrylic acid emulsion.

Description

Technical field [0001] The invention relates to an acrylic emulsion and a functional acrylic emulsion for a shadowless protective film. Background technique [0002] Surface protection adhesive tape is mainly used to protect the surface of a type of pressure-sensitive adhesive tape to prevent the surface of the material from being scratched, polluted and corroded during processing, transportation, storage and use. Such as various plastic plates, soil-mounted plates, stainless steel plates and aluminum alloy materials. [0003] The surface protective film has the following requirements: easy to stick; it can be peeled off repeatedly without leaving any pressure-sensitive adhesive marks and "dark shadows" on the metal surface; no corrosion or rust on the metal surface; excellent water whitening resistance , Humidity and heat resistance and aging resistance, without any bad smell. [0004] Judging from recent public reports on pressure-sensitive adhesives for surface protection films ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F220/14C08F220/28C08F222/02C08F220/58C08F2/24C08L33/08C09J133/08C09J11/06C09J7/02
Inventor 林中祥周波牛正发曹刚杨华新
Owner 南京夜视丽精细化工有限责任公司
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