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Synthetic method of acrylic resin

A technology of acrylic resin and synthesis method, applied in coatings, polyurea/polyurethane coatings, etc., can solve problems such as poor adhesion, and achieve the effect of improving adhesion, good physical and chemical properties and construction properties, and excellent physical and chemical properties

Active Publication Date: 2013-06-05
西安经建油漆有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem of poor adhesion of current two-component polyurethane primers on bare aluminum surfaces

Method used

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  • Synthetic method of acrylic resin

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Experimental program
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Effect test

preparation example Construction

[0017] The synthetic method of described acrylic resin comprises the following steps:

[0018] Step 1) Pour 2 / 3 parts by weight of the above xylene, 10-15 parts of toluene, and 8-10 parts of butyl acetate into the reactor to form a solvent, and leave 1 / 3 of the xylene to flush the pipeline;

[0019] Step 2) Dissolve 0.3-0.8 parts of initiator 1 with 15-19 parts of methyl methacrylate, and then add the above weight parts of styrene, butyl acrylate, acrylic acid and 1 / 3 of the above formula amount of hydroxypropyl acrylate and The mixed solvent in step 1) is mixed into a mixed monomer and put into the head tank;

[0020] Step 3) Turn on the condenser, raise the temperature, keep reflux, start dropwise adding the mixed monomer in step 2) at 120-125°C, control the addition in 2.5-3 hours, when the mixed monomer is dropped halfway, add another 1 / 3 The hydroxypropyl acrylate of the above-mentioned formula amount is added to this mixed monomer. After adding, the mixed solution was...

Embodiment 1

[0023] Get 17kg of methyl methacrylate, 8kg of styrene, 22kg of butyl acrylate, 7kg of hydroxypropyl acrylate, 1.2kg of acrylic acid, 0.5kg of initiator 1, 0.3kg of initiator 2, and 0.3kg of initiator The xylene of agent 3,17.7kg, the toluene of 12kg, the butyl acetate of 9kg; Described initiator 1, initiator 2, initiator 3 are benzoyl peroxide.

[0024] The synthetic method of described acrylic resin comprises the following steps:

[0025] Step 1) Pour 11.8kg of xylene, 12kg of toluene, and 9kg of butyl acetate into the reactor to form a solvent, and set aside 5.9kg of xylene to flush the pipeline;

[0026] Step 2) Dissolve 0.5kg of initiator 1 with 17kg of methyl methacrylate, then add 8kg of styrene, 22kg of butyl acrylate, 1.2kg of acrylic acid and 1 / 3 of the above formula amount of hydroxypropyl acrylate and step 1) The mixed solvent is mixed into a mixed monomer, which is poured into the high level tank;

[0027] Step 3) Turn on the condenser, raise the temperature, ke...

Embodiment 2

[0030] Get 15kg of methyl methacrylate, 5kg of styrene, 20kg of butyl acrylate, 6kg of hydroxypropyl acrylate, 1.0kg of acrylic acid, 0.3kg of initiator 1, 0.1kg of initiator 2, and 0.1kg of initiator The xylene of agent 3,17.7kg, the toluene of 10kg, the butyl acetate of 8kg; The synthetic method of described acrylic resin is with embodiment 1.

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Abstract

The invention discloses a synthetic method of acrylic resin. The synthetic method comprises the following steps of: (1) pumping dimethylbenzene, methylbenzene and butyl acetate into a reaction kettle, and reserving little dimethylbenzene for flushing pipelines; (2) dissolving an initiator 1 in methyl methacrylate, then adding styrene, butyl acrylate, acyclic acid and one third of hydroxy-propyl acrylate for mixing with the mixed solvent in the step (1) to form a mixed monomer, and pumping into a header tank; (3) opening a condenser, heating, maintaining refluxing, dropwise adding the mixed monomer in the step (2) at 120-125 DEG C, completing dropwise addition within 2.5-3 hours, after one half of mixed monomer is dropwise added, adding another one third of hydroxy-propyl acrylate to the mixed monomer according to the formula amount, after one half of new mixed monomer is dropwise added, adding the rest of one third of hydroxy-propyl acrylate according to the formula amount, continuing dropwise addition, and carrying out heat preservation for 2 hours after the dropwise addition of the mixed solution is ended; and (4) refilling an initiator 2 in the solution in the step 3, carrying out heat preservation for 2 hours, refilling an initiator 3, carrying out heat preservation for 2 hours, and closing water of the condenser.

Description

technical field [0001] The invention relates to a method for synthesizing a resin, in particular to a method for synthesizing an acrylic resin. It belongs to the field of chemical industry. Background technique [0002] The acrylic polyurethane paints generally used in the surface coating of industrial machinery, equipment, automobiles, etc. have high hardness, large internal stress in the paint film, and poor adhesion on the bare aluminum surface. For good adhesion, the bare aluminum surface must be chemically treated, that is, anodized or arodin chemically treated. After treatment, a layer of oxide film is formed on the bare aluminum surface. This oxide film is uniform and porous, which increases the contact area with the surface coating, thereby improving the adhesion of the surface coating. The surface coating is firmly attached to the aluminum plate. surface. Due to many factors, industrial parts (bare aluminum) cannot be chemically treated. Therefore, the present ...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F220/14C08F212/08C08F220/28C08F220/06C09D175/04C09D7/12
Inventor 王文月杨金安
Owner 西安经建油漆有限责任公司
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