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Polyacrylate-urethane copolymer and preparation method thereof

A technology of polyacrylate and hydroxyl-terminated polyacrylate, which is applied in the field of chemical materials, can solve the problems that polyurethane has no relevant reports, and achieve the effects of controllable molecular weight, good solubility, and clear structure

Active Publication Date: 2012-08-08
溧阳常大技术转移中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no relevant reports at home and abroad on the research of polyurethane synthesis with hydroxyl-terminated polyacrylate prepared by ATRP method as raw material.

Method used

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  • Polyacrylate-urethane copolymer and preparation method thereof
  • Polyacrylate-urethane copolymer and preparation method thereof
  • Polyacrylate-urethane copolymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Embodiment 1: (preparation of polyethylacrylate-urethane copolymer with the linear hydroxyl-terminated polyethylacrylate of molecular weight 2000 as raw material)

[0064] (1) preparation of molecular weight 2000 linear polyethyl acrylate

[0065] Polymerization formula: Initiator (alpha-bromoisobutyrate hydroxybutyl): monomer (ethyl acrylate): catalyst: ligand = 1: 23.3: 0.233: 0.465 (molar ratio), then add 20 % toluene as solvent.

[0066] Polymerization step: Add 20 g (0.2326 mol) of ethyl acrylate monomer to a 100 ml four-necked flask equipped with a thermometer and a magnetic stirrer, and 2.65 g (0.01 mol, a purity of 93% ), 4 g of solvent toluene, 0.335 g (0.00233 mol) of catalyst CuBr, and 0.80 g (0.00465 mol) of ligand PMDETA, mixed uniformly, vacuumed the system with nitrogen, and reacted at 65°C to 70°C for 10 hours. After the reaction finishes, dilute the polymer with ethyl acetate, remove the catalyst in the polymer, and then remove the solvent in the syst...

Embodiment 2

[0073] Embodiment 2: (preparation of polybutylacrylate-urethane copolymer with the linear hydroxyl-terminated polybutylacrylate of molecular weight 2000 as raw material)

[0074] (1) Preparation of linear polybutylacrylate with molecular weight 2000

[0075]Polymerization formula: Initiator (alpha-bromoisobutyrate hydroxybutyl): monomer (butyl acrylate): catalyst: ligand = 1: 14.4: 0.125: 0.251 (molar ratio), then add 20 % toluene as solvent.

[0076] Polymerization step: Add 103.95 g (0.812 mol) of butyl acrylate monomer to a 100 ml four-necked flask equipped with a thermometer and a magnetic stirrer, and 13.5 g (0.0565 mol, purity 90 %), solvent toluene 20g, catalyst CuBr1.02g (0.00708mol), ligand PMDETA

[0077] 2.45 g (0.0142 mol), mix well, vacuumize the system with nitrogen, and react at 60°C to 65°C for 9 hours. After the reaction finishes, dilute the polymer with ethyl acetate, remove the catalyst in the polymer, and then remove the solvent in the system through dec...

Embodiment 3

[0084] Embodiment 3: (preparation of polyisooctyl acrylate-urethane copolymer with the linear hydroxyl-terminated polyacrylate isooctyl of molecular weight 2000 as raw material)

[0085] (1) Preparation of linear polyisooctyl acrylate with a molecular weight of 2000

[0086] Polymerization formula: Initiator (alpha-bromoisobutyrate hydroxybutyl): monomer (isooctyl acrylate): catalyst: ligand = 1: 10: 0.126: 0.253 (molar ratio), then add equal to monomer mass 20% toluene was used as solvent.

[0087] Polymerization step: In a 500ml four-necked flask equipped with a thermometer and a magnetic stirrer, 162.13g (0.88mol) of isooctyl acrylate monomer, 21g (0.0879mol, purity 90 %), solvent toluene 32.35g, catalyst CuBr 1.60g (0.0111mol), ligand PMDETA 3.85g (0.0222mol), mix uniformly, vacuumize the system with nitrogen, and react at 60°C-65°C for 8h. After the reaction, the polymer was diluted with ethyl acetate to remove the catalyst in the polymer, and then the solvent in the sy...

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Abstract

The invention relates to a polyacrylate-urethane copolymer which has a structural formula shown in the specification of the inveniton, wherein n=3-200, carbon atom number of R1 is less than 25, and R' is polyacrylate. A preparation method comprises the steps of: firstly, preparing polyacrylate with one linear or branched end of Br and the other end of hydroxyl, wherein the polyacrylate has molecular weight of 500-10000 and narrower molecular weight distribution, carrying out nucleophilic substitution on terminal bromine of the polyacrylate by N-methyl ethanolamine to obtain hydroxyl terminated polyacrylate; and then reacting the hydroxyl terminated polyacrylate R(HO)n used as raw materials with isocyanates R1(OCN)n in the presence of a given quantity of solvent or in absence of solvent ata certain temperature under the condition of adding a given quantity of catalyst or no catalyst to prepare the novel polyacrylate-urethane copolymer with molecular weight of above 8000 and molecular main chain containing acrylate and urethane structures. The copolymer has better dissolubility, mechanical behavior, adhesive property and thermostabilization, and has respective advantages of the acrylate and the polyurethane.

Description

technical field [0001] The invention belongs to the field of chemical materials and relates to the preparation of acrylate-urethane copolymers containing acrylate and urethane structures in the main chain by using hydroxyl-terminated polyacrylate polymers synthesized by atom transfer radical polymerization (ATRP) as raw materials. Background technique [0002] Polyurethane has good physical and mechanical properties, excellent cold resistance, elasticity, high gloss, adjustable polymer hardness, and resistance to organic solvents. It is widely used in automobiles, construction, machinery, light industry, medical equipment, and safety protection. and aerospace fields. However, polyurethane resin has disadvantages such as relatively high price and poor aging resistance. Acrylic resin has the advantages of high mechanical strength, aging resistance, light resistance and non-yellowing, and good water resistance, but has disadvantages such as poor resistance to organic solvents,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/62C08F120/16C08F8/26
Inventor 李坚孙治丹范瑞香任强俞强
Owner 溧阳常大技术转移中心有限公司
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