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Preparation method of polyurethane modified fluorinated acrylic resin for reflecting material

A technology of fluorinated acrylic acid and polyurethane modification, which is applied in the field of coating resin preparation to achieve the effects of small diameter, excellent hydrophobicity and oleophobicity, and high degree of enrichment

Inactive Publication Date: 2015-04-29
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

[0011] Aiming at the problem of poor high temperature and strong alkali washing and dry cleaning performance of existing reflective materials, the present invention provides a preparation of polyurethane-modified fluorinated acrylic resin for reflective materials Method, this kind of resin can not only form a film on the cloth base, but also bond glass beads, so that the reflective material made has a retro-reflective function under light irradiation, and has better resistance to high temperature and strong alkali (95°C, PH=13) washing, dry cleaning resistance, perspiration resistance and soft hand feeling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] (1) Preparation of active fluorinated acrylate polymers

[0064] Based on the total weight of comonomers, weigh 2% mercaptoethanol, 5% dodecafluoroheptyl methacrylate, 1% hydroxyethyl acrylate, 35.2% butyl acrylate, 34.8% isooctyl acrylate, methacrylate 10% methyl acrylate, 10% ethyl acrylate, 2% methyl acrylate, 0.4% azobisisobutyronitrile, 100% ethyl acetate, add the monomer mixture and 2 / 3 solvent to the reactor, start stirring Start to heat up rapidly to reflux, reflux for 1 hour, then dropwise add the initiator solution composed of the initiator and the remaining 1 / 3 solvent, drop evenly within 3 hours, then keep warm for 3 hours, cool to about 30°C and filter out the material, the solid content is 50%.

[0065] (2) Preparation of isocyanate-terminated prepolymer

[0066] Weigh polyester polyol (hydroxyl value 47 mgKOH / g, acid value 0.4 mgKOH / g) 90.2%, toluene diisocyanate 9.8%, organic solvent 100%, R (molar ratio of isocyanate group to hydroxyl group) = 1.5...

Embodiment 2

[0071] (1) Preparation of active fluorinated acrylate polymers: Based on the total weight of comonomers, weigh 65% of isooctyl acrylate, 11% of methyl methacrylate, 1% of 3-mercapto-1-propanol, 10% of hexafluorobutyl methacrylate, hydroxyacrylate 2% of propyl ester, 10.1% of butyl methacrylate, 0.9% of methyl acrylate, 0.5% of azobisisobutyronitrile, 70% of ethyl acetate, 10% of toluene, the process condition of polymerization is carried out by embodiment 1, solid The content is 55%.

[0072] (2) Preparation of isocyanate-terminated prepolymer

[0073] Weigh polyester polyol (hydroxyl value 44 mgKOH / g, acid value 0.4 mgKOH / g) 90.2%, toluene diisocyanate 9.8%, organic solvent 120%, R (molar ratio of isocyanate group to hydroxyl group) = 1.6 , add polyester polyol and 20% organic solvent into the reaction kettle, start stirring, heat up for dehydration, stop heating when the dehydration temperature reaches 140°C, about 12% of the organic solvent will come out, cool down to ...

Embodiment 3

[0078] (1) Preparation of active fluorinated acrylate polymers:Based on the total weight of comonomers, weigh 33% isooctyl acrylate, 30% tridecyl acrylate, 10% trifluoroethyl methacrylate, 11% isobornyl methacrylate, 3-mercapto -2-butanol 1%, hydroxypropyl acrylate 2%, lauryl acrylate 11%, methyl acrylate 2%, azobisisobutyronitrile 0.5%, ethyl acetate 70%, toluene 10%, polymerization process Condition is carried out by embodiment 1, and solid content is 55%.

[0079] (2) Preparation of isocyanate-terminated prepolymer

[0080] Weigh polyester polyol (hydroxyl value 47 mgKOH / g, acid value 0.4 mgKOH / g) 90.2%, toluene diisocyanate 9.8%, organic solvent 120%, R (molar ratio of isocyanate group to hydroxyl group) = 1.5 , add polyester polyol and 20% organic solvent into the reaction kettle, start stirring, heat up for dehydration, stop heating when the dehydration temperature reaches 140°C, about 12% of the organic solvent will come out, cool down to 65°C, add toluene diisocya...

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Abstract

The invention provides a preparation method of polyurethane modified fluorinated acrylic resin for a reflecting material. The preparation method comprises the following steps: firstly, preparing an active fluorinated polyacrylate polymer; and then, preparing a terminated isocyanate prepolymer, and promoting the active fluorinated polyacrylate polymer to react with the terminated isocyanate prepolymer so as to obtain the polyurethane modified fluorinated acrylic resin. The resin disclosed by the invention can be used for forming a film on a cloth base and can be also used for bonding glass beads, so that the prepared reflecting material has a retro-reflection function in light exposure, and the reflecting material is relatively good in such performances as high-temperature strong base washing resistance (95 DEG C, pH=13), dry washing resistance, sweat resistance, soft hand feel and the like.

Description

technical field [0001] The invention relates to a method for preparing a coating resin used on reflective materials, in particular to a method for preparing polyurethane-modified fluorinated acrylic resin for reflective materials. [0002] Background of the invention [0003] In road construction management, fire fighting, maritime affairs, transportation, mining operations or other operations, for the safety of personnel, reflective materials are added to the work clothes, which have a warning effect. A variety of reflective materials are known, their fields of application continue to expand, and people's performance requirements are also constantly increasing, especially for clothing articles worn in harsh environments. This type of clothing includes firefighter jackets, miners and construction workers' safety protective clothing. Because these clothes are often used under harsh conditions, they may become very dirty and need to be washed in a high-temperature alkaline e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/62C08G18/42C08F220/22C08F220/28C08F220/18C08F220/14
CPCC08F220/18C08G18/10C08G18/4063C08G18/6279C08G2270/00C08F220/1808C08F220/1804C08G18/62C08F220/22C08F220/281C08F220/14C08F220/1812
Inventor 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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