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High molecular weight acrylic resin for polyvinylidene fluoride coiled material finish paint

A polyvinylidene fluoride resin, polyvinylidene fluoride technology, applied in the direction of coating, etc., to achieve the effect of slow termination, significant automatic acceleration effect, and high molecular weight distribution

Active Publication Date: 2013-11-06
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the artificial aging resistance of the coil topcoat film obtained by incorporating the resin still needs to be improved.

Method used

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  • High molecular weight acrylic resin for polyvinylidene fluoride coiled material finish paint
  • High molecular weight acrylic resin for polyvinylidene fluoride coiled material finish paint
  • High molecular weight acrylic resin for polyvinylidene fluoride coiled material finish paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] ① See Table 1 for the amount of raw materials.

[0018] Table 1

[0019]

[0020] ②Specific operation of suspension polymerization

[0021] Add distilled water into the reaction vessel, add inorganic dispersant and heat up to 70°C under stirring and nitrogen flow, then add the homogeneous mixture of raw material monomers and initiators, keep the temperature at 80°C for 6 to 7 hours, then heat up to After heat preservation reaction at 90°C for 1 hour, cool down to 30°C, add 22.95 grams of dilute acid (5wt% sulfuric acid), and react for 10 minutes, then filter, wash with water, discharge, and dry to obtain bead-like transparent particles, which are high molecular weight acrylic acid Resin B-1. The Mn of the B-1 resin measured by gel permeation chromatography is 137116; the Mw is 166213; and the Mw / Mn is 1.21.

Embodiment 2

[0023] ① See Table 2 for the amount of raw materials.

[0024] Table 2

[0025]

[0026] ②Specific operation of suspension polymerization

[0027] Add distilled water into the reaction vessel, add inorganic dispersant and raise the temperature to 70°C under stirring and nitrogen gas, then add the homogeneous mixture of raw material monomers and initiators, keep the temperature at 80°C for 5 to 6 hours, then heat up to After heat preservation reaction at 90°C for 1 hour, cool down to 30°C, add 22.97 grams of dilute acid (5wt% sulfuric acid), and react for 10 minutes, then filter, wash with water, discharge, and dry to obtain bead-like transparent particles that are high molecular weight acrylic acid Resin B-2. The Mn of the B-2 resin measured by gel permeation chromatography is 112938; the Mw is 171944; and the Mw / Mn is 1.52.

Embodiment 3

[0029] ① See Table 3 for the amount of raw materials.

[0030] table 3

[0031]

[0032] ②Specific operation of suspension polymerization

[0033] Add distilled water into the reaction vessel, add inorganic dispersant and raise the temperature to 70°C under stirring and nitrogen gas, then add the homogeneous mixture of raw material monomers and initiators, keep the reaction at 80°C for 5 to 6 hours, then cool down to At 30°C, add 18.79 grams of dilute acid (4wt% phosphoric acid), react for another 10 minutes, then filter, wash with water, discharge, and dry to obtain bead-like transparent particles that are high molecular weight acrylic resin B-3. The Mn of the B-3 resin measured by gel permeation chromatography is 97365; the Mw is 160517; and the Mw / Mn is 1.65.

[0034] (2) Preparation of coil topcoat

[0035] In order to investigate the performance of the high-molecular-weight acrylic resin of the present invention, the acrylic resin of the present invention (embodimen...

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Abstract

The invention relates to a high molecular weight acrylic resin for a polyvinylidene fluoride coiled material finish paint. The acrylic resin is combined with polyvinylidene fluoride resin as a coiled material finish paint base-material, is a bead-shape transparent particle and has a number-average molecular weight Mn higher than 90 thousand and molecular weight distribution Mw / Mn less than 2.0. The resin of the invention is prepared by a suspension polymerization method from material monomers of 50-80 wt% of methyl methacrylate and / or methyl acrylate, 10-40 wt% of ethyl acrylate and / or methyl methacrylate and 0-40 wt% of one or more selected from acrylic acid, hydroxyethyl acrylate, hydroxypropyl acrylate, methacrylic acid, hydroxyethyl methacrylate, hydroxypropyl methacrylate, butyl acrylate and butyl methacrylate. The high molecular weight acrylic resin of the invention can be combined with a PVDF resin, and a prepared finish paint film has comprehensive properties the same as an imported one and better performances on MEK-resistant wiping frequency and artificial ageing resistance.

Description

technical field [0001] The present invention relates to a high molecular weight acrylic resin used for polyvinylidene fluoride coil topcoat, more specifically, a polyvinylidene fluoride (PVDF) resin that can be incorporated as a coil topcoat base material high molecular weight acrylic resin. Background technique [0002] Polyvinylidene fluoride (hereinafter referred to as PVDF) resin has a large number of C-F bonds with high bond energy (116Kcal / mol) in its structural chain, so many properties of this resin are very excellent, the most prominent performance is that it has the properties of other resins In addition, PVDF resin also has excellent flexibility, stain resistance, chemical medium resistance, heat resistance and hydrolysis resistance. Foreign coil coating researchers began to study the preparation of high-performance coil coatings with PVDF resins as early as the 1970s. Now the product has been widely used in the market. However, due to the semi-crystalline stat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/14C08F220/18C08F220/06C08F220/28C08F2/18C09D127/16C09D133/12C09D133/08
Inventor 冯春苗甘崇宁吴奎录常霞俊王飞周春丽蒋旭蒋英侠
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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