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Polyurethane/polyacrylate copolymer and BOPP (Biaxially-oriented Polypropylene) film prepared by same

A technology of polyacrylate and hydroxy acrylate, applied in coating and other directions, can solve the problems of insufficient film performance, short service life, poor coating performance, etc., and achieve a simple and rapid film forming process and good dimensional stability. , the effect of excellent elasticity

Active Publication Date: 2013-04-24
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, chlorinated polypropylene often needs to use benzene solvents, which do not meet the requirements of environmental protection. When polyacrylate polymer solutions are used alone, because acrylate polymers generally have a chain-like linear structure, they are extremely sensitive to temperature. It will gradually become soft and viscous when it rises; when the temperature drops to a certain limit, it will gradually become brittle and have poor weather resistance, so the resulting coating performance is poor; when polyurethane polymer solution is used alone, there is a problem of poor heat resistance
In the industry, the direct physical mixing method is generally used to modify the two, but the compatibility is poor, the performance of the coating film cannot be fully exerted, the service life is short, and there are problems such as shrinkage and deformation.

Method used

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  • Polyurethane/polyacrylate copolymer and BOPP (Biaxially-oriented Polypropylene) film prepared by same
  • Polyurethane/polyacrylate copolymer and BOPP (Biaxially-oriented Polypropylene) film prepared by same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of polyurethane macromonomer terminated with hydroxyethyl methacrylate: dehydrate polyether diol by rotary evaporation, and vacuum dry it in a vacuum oven at 120°C to obtain dehydrated polyether diol . According to the weight ratio, add 100 parts of dehydrated polyether diol N210 (molecular weight: 1000) into a reactor equipped with a stirrer and a thermometer, raise the temperature to 80°C, and then add 34 parts of toluene diisocyanate, under the condition of stirring Mix evenly at 80°C and continue to react for 3 hours to obtain a polyurethane prepolymer with an end group of -NCO-; then add 26 parts of hydroxyethyl methacrylate to block the -NCO-, and react at 80°C for 4 Hours later, the sample was taken for testing, and the results of its infrared spectrum showed 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 toluene diisocyanate ...

Embodiment 2

[0036] (1) Preparation of polyurethane macromonomer terminated with hydroxyethyl methacrylate: dehydrate polyether diol by rotary evaporation, and vacuum dry it in a vacuum oven at 120°C to obtain dehydrated polyether diol . According to the weight ratio, add 100 parts of dehydrated polyether diol N210 (molecular weight: 1000) into a reactor equipped with a stirrer and a thermometer, raise the temperature to 70°C, and then add 50 parts of diphenylmethane diisocyanate, Mix well under the condition of stirring, and continue to react for 3 hours to obtain a polyurethane prepolymer whose terminal group is -NCO-; then add 26 parts of hydroxyethyl methacrylate to block -NCO-, and react at 80°C After 4 hours, the sample was taken for testing, and the results of its infrared spectrum showed 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 diisocyanat...

Embodiment 3

[0042] (1) Preparation of polyurethane macromonomer terminated with hydroxyethyl methacrylate: dehydrate polyether diol by rotary evaporation, and vacuum dry it in a vacuum oven at 120°C to obtain dehydrated polyether diol . According to the weight ratio, add 100 parts of dehydrated polyether diol N210 (molecular weight: 1000) into a reactor equipped with a stirrer and a thermometer, raise the temperature to 85 ° C, and then add 44 parts of isophorone diisocyanate, in Mix well under stirring conditions, and continue to react for 7 hours to obtain a polyurethane polymer whose end group is -NCO-; then add 26 parts of hydroxyethyl methacrylate to end-cap the -NCO-, and react at 80°C for 3 Hours later, the sample was taken for testing, and the results of its infrared spectrum showed 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 isophorone diisocyanate reacted...

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Abstract

The invention belongs to the field of coatings and discloses a polyurethane / polyacrylate copolymer and a BOPP (Biaxially-oriented Polypropylene) curing film prepared by the same. The polyurethane / polyacrylate copolymer is prepared by the following steps: (1) preparing a polyurethane macromonomer at the sealing end of hydroxyl methacrylate; (2) preparing a polyacrylate macromonomer; and (3) preparing the polyurethane / polyacrylate copolymer. A preparation method of the BOPP film prepared by taking the polyurethane / polyacrylate copolymer as a raw material comprises the following steps: taking 10 parts of polyurethane / polyacrylate copolymer, 0.4 part of initiator a,a-diethoxyacetophenone, fully agitating for 5-15 minutes till uniform mixing, obtaining a ultraviolet cured coating, coating an ultraviolet cured material on the BOPP surface and irradiating for 1 minute through ultraviolet light) with a wavelength of 365 nm to obtain the BOPP film.

Description

technical field [0001] The invention belongs to the field of coatings, and in particular relates to a polyurethane / polyacrylate copolymer and a BOPP film prepared therefrom. technical background [0002] Biaxially oriented polypropylene film (BOPP) is one of the most important packaging plastic films. It has light weight, good transparency, moisture resistance and oxygen resistance, good air tightness, toughness and folding resistance, smooth surface, heat resistance, acid and alkali, solvents, Friction and tearing can reproduce the shape and color of the product, and it is cheap and has excellent processing performance. It is often used as the surface material of composite films and as a base material, and can be widely used in plastic packaging materials. However, since the polyolefin film is non-polar and difficult to print, the industry usually uses corona and coating methods to treat the surface of BOPP to increase its surface energy, thereby increasing the adhesion bet...

Claims

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Application Information

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IPC IPC(8): C08G81/02C08G18/67C08G18/48C08F220/14C08F220/18C08F220/28C09D187/00C08J7/04C08L23/12
Inventor 刘伟区王红蕾
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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