Preparation method of acrylic resin with branched chain containing polyester chain

A technology of acrylic resin and polyester resin, which is applied in the field of preparation of acrylic resin, can solve the problems of poor drying of polyester resin, low molecular weight of polyester resin, poor drying and other problems, and achieve the effect of good impact resistance

Inactive Publication Date: 2020-01-03
山东凯威尔新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although acrylic resin has good drying properties, weather resistance and hardness, etc., it has non-negligible defects in pigment dispersibility, solvent resistance, flexibility and adhesion.
[0004] Polyester resin, that is, polyester resin made from polybasic acid and polyol (such as a mixture of aliphatic alcohol and alcohol), is difficult to apply to automobile repairs that require high gloss, mechanical properties, and chemical resistance. In paints and similar topcoats, polyester resins have the disadvantages of poor drying, poor weather resistance, poor stain resistance, and insufficient hardness
[0005] In order to improve the above problems, a new resin is synthesized by mixing acrylic resin and polyester resin in the prior art. The resin synthesized in this way has high solid content and good coating film formation, but the low molecular weight of polyester resin leads to its application in There will be problems of poor drying, poor stain resistance and poor solvent resistance on the product, and there will be problems of poor compatibility depending on the molecular weight and type of polyester resin

Method used

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  • Preparation method of acrylic resin with branched chain containing polyester chain
  • Preparation method of acrylic resin with branched chain containing polyester chain
  • Preparation method of acrylic resin with branched chain containing polyester chain

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Preparation of polyester intermediate 1

[0042] Add 166.7g of trimethylolpropane (TMP), 269.3g of octapentyl glycol (NPG), 85.5g of 1,6-hexanediol (1,6-HD) and isophthalic acid ( IPA) 448.4g, adipic acid 169g, heat up to 210°C under nitrogen environment, keep warm for esterification reaction, acid value drops below 10mgKOH / g and then cool down, add toluene 328.5g at 120°C, n-butyl acetate 328.5 g and 52g of maleic anhydride, then heat up to 115°C for heat preservation, and the reaction ends when the acid value reaches between 24-28mgKOH / g, the solid content is 60.3%, and the bubble viscosity is O-P, and the acid value of 25mgKOH / g can be obtained Polyester resin with unsaturated double bonds at the end of the molecule.

[0043] (2) Preparation of acrylic resin containing polyester chain on branched chain

[0044]Add 1 250g of polyester intermediate, 24.5g of xylene, and 2g of di-tert-butyl peroxide into the four-necked reaction flask, raise the temperature to 125...

Embodiment 2

[0046] (1) Preparation of polyester intermediate 2

[0047] Same as the synthetic method of intermediate 1 in Example 1, just replace the maleic anhydride therein with oxalic anhydride 64.7g, make solid content be 60.8%, bubble viscosity is Q, the molecule of acid value 23mgKOH / g Polyester resin with unsaturated double bonds at the end.

[0048] (2) Preparation of acrylic resin containing polyester chain on branched chain

[0049] Add 250g of intermediate 2, 24.5g of xylene, and 2g of di-tert-butyl peroxide into the four-necked reaction flask, raise the temperature to 125°C under nitrogen atmosphere, and add 75g of styrene, methyl 80g of methyl acrylate, 75g of tert-butyl acrylate, 50g of butyl methacrylate, 67.5g of 2-hydroxypropyl acrylate, and 2.5g of methacrylic acid are mixed, and 60.5g of n-butyl acetate is added in the initiator dropping tank, Mix 43g of (2-ethylhexanoic acid) tert-butyl peroxide and 5g of tert-butyl peroxybenzoate; after reaching 125°C, the monomer a...

Embodiment 3

[0051] (1) Preparation of polyester intermediate 3

[0052] Add 167.3g of trimethylolpropane (TMP), 270.4g of octapentyl glycol (NPG), 85.9g of 1,6-hexanediol (1,6-HD) and 85.9g of isophthalic acid (IPA) into the four-necked reaction flask. ) 386.5g, adipic acid 209.6g, methacrylic acid 20g, heat up to 210°C under nitrogen environment to carry out esterification reaction, the acid value reaches 15mgKOH / g and lower the temperature, add toluene 328.5g below 120°C, acetic acid is 328.5 g of butyl ester was diluted to obtain a polyester resin having unsaturated double bonds at the molecular end with a solid content of 60.1%, a bubble viscosity of R-S, and an acid value of 8 mgKOH / g.

[0053] (2) Preparation of acrylic resin containing polyester chain on branched chain

[0054] Add 250g of intermediate 3, 24.5g of xylene, and 2g of di-tert-butyl peroxide into the four-necked reaction flask, raise the temperature to 125°C under nitrogen atmosphere, and add 75g of styrene and methac...

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Abstract

The invention belongs to the technical field of acrylic resin, and particularly relates to a preparation method of acrylic resin with a branched chain containing a polyester chain. The preparation method comprises the steps: preparing a polyester intermediate with a polyester resin tail end and an unsaturated double bond; and carrying out free radical polymerization reaction on the polyester intermediate and an acrylic monomer to prepare the acrylic resin with the branched chain containing the polyester chain. With adopting of the preparation method of the acrylic resin with the branched chaincontaining the polyester chain, the prepared acrylic resin has the advantages of good adhesiveness, solvent resistance, gloss, softness and impact resistance of polyester resin, also has excellent physical properties such as weather resistance, hardness, chemical resistance and dryness of the acrylic resin, and the polyester resin and the acrylic resin complement each other to finally form perfect physical properties, so that the acrylic resin can be applied to two-liquid polyurethane coatings in automobile repair coatings and finish paints.

Description

technical field [0001] The invention belongs to the technical field of acrylic resins, and in particular relates to a preparation method of an acrylic resin whose branches contain polyester chains. Background technique [0002] Coatings for automotive repair have strict requirements on the gloss, mechanical properties and chemical properties of the product. Mechanical properties refer to surface hardness, friction resistance, impact resistance, etc., and chemical properties include acid resistance, alkali resistance, pollution resistance, solvent resistance, and weather resistance. [0003] General car repair paint is composed of acrylic series resin and curing agent, and it is a heat-curing paint using polyurethane curing agent. Although acrylic resin has good drying properties, weather resistance and hardness, etc., it has non-negligible defects in pigment dispersibility, solvent resistance, flexibility and adhesion. [0004] Polyester resin, that is, polyester resin mad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/01C08F220/14C08F212/08C08F220/18C08F220/20C08F220/06
CPCC08F283/01C08F220/14C08F212/08C08F220/20C08F220/06
Inventor 邓金标李起雨马金玉刘子畅肖超苏旭
Owner 山东凯威尔新材料有限公司
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