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A kind of acrylate polymer, preparation method and application thereof

An acrylate and polymer technology, applied in the direction of coating, can solve the problems of affecting the arrangement of aluminum powder, poor compatibility, poor resin matching, etc., and achieve the effect of not easy to fall off and good compatibility

Active Publication Date: 2019-07-26
NIPPON PAINT IND COATINGS SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cellulose acetate is only soluble in very strong solvents such as acetone, methyl ethyl ketone and ethyl acetate; and it has very low tolerance to hydrocarbon solvents, and its compatibility with resins is poor, and it can be used commercially. not much resin
If the compatibility of acrylic resin and cellulose acetate butyrate is not good, it will seriously affect the performance of the coating, the surface gloss of the coating film will be poor, wrinkling, and the arrangement of aluminum powder will be seriously affected

Method used

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  • A kind of acrylate polymer, preparation method and application thereof
  • A kind of acrylate polymer, preparation method and application thereof
  • A kind of acrylate polymer, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] One, prepare the monomer containing anchoring group, also known as MCE monomer: the prepolymer of glycidyl tertiary carbonic acid ester and acrylic acid monomer; Definition product name MCE-BAC (methacrylic acid and glycidyl tertiary carbonic acid) in this embodiment Ester prepolymer butyl acetate solution), formula is as shown in table 1:

[0071] Table 1

[0072]

[0073] Preparation method: Add 57g of CARDURA E10P and 20g of butyl acetate to a four-necked flask equipped with a stirrer, condenser, thermometer and dropping funnel, raise the temperature to 140°C under nitrogen protection, add 23g of methacrylic acid and the For the mixture of 0.012 g of hydroquinone, after the dropwise addition, continue to heat up to 150° C., and keep it warm until the end of the reaction. The acid value is 15-35 through control detection at the end of the reaction, the viscosity is A5-E (Gargerian tube / 25° C.), and the solid content is 70-90%. A light yellow monomer containing an ...

Embodiment 2

[0080] 1, prepare acrylate polymer, formula as shown in table 3:

[0081] table 3

[0082]

[0083]

[0084] 2, the preparation method is the same as Example 1, the solvent is changed to butyl acetate, and the diluting solvent is butyl acetate and propylene glycol methyl ether acetate, and the MCE consumption that makes acrylate polymer is 16%, and molecular weight and distribution are: number average molecular weight Mn=5898, weight average molecular weight Mw=43118, dispersion M W / Mn=7.311, glass transition temperature Tg (theoretical value)=4°C, hydroxyl value (theoretical value)=42mgKOH / g, solubility parameter SP=10.25. The solid content is 50.53%, the viscosity is N~O, the acid value is 9.65, and the compatibility with CAB-381-2 is qualified.

Embodiment 3

[0102] 1, prepare acrylate polymer, formula as shown in table 7:

[0103] Table 7

[0104]

[0105] 2. The preparation method is the same as in Example 1, and the acrylate polymer is obtained. The molecular weight and distribution are: Mn=6466, Mw=39512, Mw / Mn=5.764, Tg (theoretical value)=10.6°C, hydroxyl value (theoretical value) =65 mgKOH / g, SP=10.25. The solid content is 51.29%, the viscosity is T~U, the acid value is 8.3, and the compatibility with CAB-381-2 is qualified.

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Abstract

The invention discloses an acrylate polymer. The acrylate polymer contains a following repetition structure unit represented in the specification, wherein n is 5-13, and R is selected from C1-C6 alkyl groups. The invention further discloses a preparation method of the acrylate polymer. The preparation method comprises steps as follows: prepolymer MCE monomers containing glycidyl tertiary carboxylic ester and acrylic monomers as well as a mixture of acrylate monomers and an initiator are dropwise added to a solvent under the protection of nitrogen, a product is subjected to the primary heat preservation, and the initiator is supplemented; then the heat preservation is performed for the second time, and finally, the solvent is added for dilution and adjustment of solids, so that the acrylate polymer is obtained. The monomers containing anchor groups are introduced and contain a certain number of carbon chains, terminal groups contain the anchor groups, resin molecular chains containing the anchor groups are close to CAB (cellulose acetate butyrate) molecular chains, and the molecular chains are interwoven and anchored and are not prone to falling off, so that the compatibility of acrylic resin and CAB resin is good.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to an acrylate polymer for coatings with good compatibility with cellulose acetate butyrate, a preparation method and an application thereof. Background technique [0002] China has become the largest automobile market in the world. In the next 10 years, with the increase of automobile ownership, automobile refinish paint will become the fastest-growing paint variety in China's paint industry. Due to the light color of acrylic resin, good outdoor weather resistance, excellent color and gloss retention, no discoloration under overbaking (below 170°C), and certain corrosion resistance, these characteristics determine the wide application of acrylic coatings. [0003] Currently, the largest market is automotive (especially sedan) painting. Cellulose acetate butyrate (CAB) is an esterification product of natural polymer cellulose. Because cellulose acetate butyrate has th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F265/02C08F220/14C08F220/18C09D133/00C09D151/00C09D101/14
CPCC08F265/02C09D133/00C08L51/003C08L1/14C08F220/18
Inventor 李世冰施珠容唐晓冬徐晓冬缪青徐辉
Owner NIPPON PAINT IND COATINGS SHANGHAI