Vinyl acetate-ethylene copolymer composition and coating composition comprising the same

Abstract

This invention provides a VAE copolymer composition and a coating composition comprising the same. The VAE copolymer composition comprises a VAE copolymer, a dispersion matrix, and an organic-inorganic composite; wherein the VAE copolymer composition, after undergoing an ashing process according to the ASTM D5630-22 standard method, yields an ash; the weight ratio of the ash to the weight of the solids content of the VAE copolymer composition before the ashing process is 0.003 to 0.021; wherein, tested according to the ISO 11357-1:2016 standard method, the ash has a glass transition temperature inversion point in the range of 55°C to 100°C. By comprising the aforementioned VAE copolymer composition, the coating composition of this invention, according to the GB / T 23445-2009 standard method, has an untreated elongation at break greater than or equal to 200%, and after heat treatment, the measured decay rate of the elongation at break after heat treatment is less than 40%.

Claims

1. A vinyl acetate-ethylene copolymer composition comprising a vinyl acetate-ethylene copolymer, a dispersion matrix, and an organic-inorganic complex, the organic-inorganic complex comprising an inorganic substance and a portion thereof; wherein, The vinyl acetate-ethylene copolymer composition is subjected to an ashing process according to the ASTM D5630-22 standard method to obtain an ash; wherein the weight of the ash is relative to the weight of the solid content of the vinyl acetate-ethylene copolymer composition before the ashing process, which is 0.003 to 0.021; wherein, according to the ISO 11357-1:2016 standard method, the ash has a glass transition temperature inversion point in the range of 55°C to 100°C.

2. The vinyl acetate-ethylene copolymer composition as described in claim 1, wherein, According to the ISO 11357-1:2016 standard method, the ash content has a glass transition temperature starting point in the range of 45°C to 60°C.

3. The vinyl acetate-ethylene copolymer composition as described in claim 1, wherein, The vinyl acetate-ethylene copolymer comprises structural units derived from vinyl acetate and structural units derived from ethylene, wherein the content of the structural units derived from vinyl acetate is higher than the content of the structural units derived from ethylene.

4. The vinyl acetate-ethylene copolymer composition as described in claim 3, wherein, Based on the total weight of the vinyl acetate-ethylene copolymer, the content of the structural unit derived from vinyl acetate is 70% to 95% by weight.

5. The vinyl acetate-ethylene copolymer composition as described in claim 1, wherein, The dispersion matrix contains polyvinyl alcohol, water, hydroxyethyl cellulose, or a combination thereof.

6. The vinyl acetate-ethylene copolymer composition as described in any one of claims 1 to 5, wherein, The ash has a change in isobaric specific heat capacity (ΔCp) ranging from 0.1 J / g·℃ to 1.0 J / g·℃.

7. A coating composition comprising a vinyl acetate-ethylene copolymer composition as described in any one of claims 1 to 6, and a powder component.

8. The coating composition as described in claim 7, wherein, The powder components are selected from the following groups: white cement, black cement, silicate cement, low-carbon cement, quartz sand, calcium carbonate, talc, calcium chloride, and combinations thereof.

9. The coating composition as described in claim 7 or 8, wherein, The vinyl acetate-ethylene copolymer composition and the powder component are stored separately.

10. The coating composition described in claim 7 or 8, wherein, The powder component is dispersed in the vinyl acetate-ethylene copolymer composition.

11. The coating composition as claimed in claim 10, wherein, According to the standard method of GB / T 23445-2009, the untreated elongation at break of the coating composition is greater than or equal to 200%, and after the coating composition undergoes heat treatment as specified in GB / T 23445-2009, the measured rate of decline in the elongation at break of the coating composition after heat treatment is less than 40%.

12. The coating composition as claimed in claim 10, wherein, According to the standard method of GB / T 23445-2009, the elongation at break of the coating composition after heat treatment is greater than or equal to 150%.

13. The coating composition as claimed in claim 10, wherein, According to the standard method of GB / T 23445-2009, the elongation at break of the coating composition after immersion in water is greater than or equal to 150%.

14. The coating composition as claimed in claim 10, wherein, According to the standard method of GB / T 23445-2009, the elongation at break of the coating composition after alkali treatment is greater than or equal to 150%.

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