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EP-4735513-A1 - LOW-EMISSION POLYMER COMPOSITIONS

EP4735513A1EP 4735513 A1EP4735513 A1EP 4735513A1EP-4735513-A1

Abstract

A composition comprising polyvinyl chloride, an additive selected from a plasticizer and/or a stabilizer and containing a volatile organic compound, and adsorbent particles that are capable of adsorbing the volatile organic compound and have a pore size of more than 1 nm, wherein the adsorbent particles are (a) not particles of a silica-alumina-containing compound and are not particles of eggshell, or (b) particles of a silica-alumina-containing compound having a molar silica/alumina ratio of lower than 70; a film made of the composition; and a composite structure containing the film.

Inventors

  • FERREIRA ARAÚJO, ALFREDO FILIPE
  • ROQUE MARCENEIRO, SOFIA DANIELA
  • GONÇALVES LOBO, MARIA IRENE
  • ANUTES DIAS, ANA MARIA
  • Cipriano de Sousa, Herminio José

Assignees

  • TMG - Tecidos Plastificados e Outros Revestimentos para a Indústria Automóvel, S.A.
  • Universidade de Coimbra

Dates

Publication Date
20260506
Application Date
20240518

Claims (15)

  1. 1. A composition comprising polyvinyl chloride, an additive selected from a plasticizer and/or a stabilizer and containing a volatile organic compound, and adsorbent particles that are capable of adsorbing the volatile organic compound and have a pore size of more than 1 nm, wherein the adsorbent particles are (a) not particles of a silica-alumina-containing compound and are not particles of eggshell, or (b) particles of a silica-alumina-containing compound having a molar silica/alumina ratio of lower than 70.
  2. 2. The composition according to claim 1, wherein the adsorbent particles are particles of diatomaceous earth, glass, or combinations thereof.
  3. 3. The composition according to claim 1 or 2, wherein the adsorbent particles of the silica- alumina-containing compound have a silica/alumina ratio of 5 to 70.
  4. 4. The composition according to any of the preceding claims, wherein the adsorbent particles of the silica-alumina-containing compound have a silica/alumina ratio of lower than 30.
  5. 5. The composition according to any of the preceding claims, wherein the plasticizer is selected from the group consisting of phthalates, trimellitates, adipates, sebacates, organophosphates, bio-attributed compounds, and bio-based compounds.
  6. 6. The composition according to any of the preceding claims, wherein at least 50 % of the pores of the adsorbent particles have a size of more than 1 nm.
  7. 7. The composition according to any of the preceding claims, wherein the adsorbent particles have a BET specific surface area of at least 1 m 2 /g.
  8. 8. The composition according to any of the preceding claims, wherein the size of the adsorbent particles is 1 to less than 60 pm.
  9. 9. The composition according to any of the preceding claims, wherein the composition contains 0.1 to 5.0 mass% of the adsorbent particles.
  10. 10. A film made of the composition according to any one of claims 1 to 9.
  11. 11. A composite structure comprising an adsorptive layer made of the composition of any one of claims 1 to 9.
  12. 12. The composite structure according to claim 11, wherein the adsorptive layer is a compact layer or a foam layer, or the composite structure comprises two of the adsorptive layers, wherein one is a compact layer and one is a foam layer.
  13. 13. The composite structure according to claim 11 or 12, which is an artificial leather.
  14. 14. A method of preparing a film according to claim 10 or a composite structure according to any of claims 11 to 13, comprising a step of applying the composition described in any of claims 1 to 9 in a liquid or pasty form on a support and solidifying the composition to form the film or the adsorptive layer of the composite structure.
  15. 15. The use of a film according to claim 10 or a composite structure according to any of claims 11 to 13 as a surface material in the interior of a vehicle.

Description

Low-emission polymer compositions Field of the invention The present invention relates to low-emission compositions and films and their use in the interior of a vehicle. art CN 107190521 A discloses a PVC artificial leather containing zeolite as an adsorbent for plasticizers but does not disclose the pore size or the silica/alumina ratio of the zeolite. DE 10 2015 107 173 A1 discloses structures containing a polymer layer which comprises a zeolite having a pore size of 0.5 nm or lower as an adsorbent and is used to adsorb plasticizers migrating from adjacent layers. WO 2022/243084 A1 discloses a PVC dense layer composition for preparing artificial leather, wherein the PVC dense layer composition comprises a zeolite as an adsorbent having a pore size of 0.4 to 1 nm and a silica/alumina ratio of greater than 30 and up to 1000. Problem to be solved bv the invention The problem underlying the present invention was to provide a polymer composition and a film being improved in terms of low emissions of volatile organic compound (VOC). Summary of the invention The problem underlying the present invention was solved by a composition containing specific adsorbent particles. The present invention covers the following aspects [1] to [15], [1] A composition comprising polyvinyl chloride, an additive selected from a plasticizer and/or a stabilizer and containing a volatile organic compound, and adsorbent particles that are capable of adsorbing the volatile organic compound and have a pore size of more than 1 nm, wherein the adsorbent particles are (a) not particles of a silica-alumina-containing compound and are not particles of eggshell, or (b) particles of a silica-alumina-containing compound having a molar silica/alumina ratio of lower than 70. [1 -1] The composition according to aspect [1], wherein the adsorbent particles are natural products or synthetic products. [1-2] The composition according to any of the preceding aspects, wherein the pore size is up to 50 nm, preferably 5 to 50 nm. [1-3] The composition according to any of the preceding aspects, wherein at least 90 % of the pores have a size of more than 1 nm. [1-4] The composition according to any of the preceding aspects, wherein the adsorbent particles (b) have a molar silica/alumina ratio of at least 5. [1-5] The composition according to any of the preceding aspects, wherein the content of the polymer is more than 40 mass%. [1 -6] The composition according to any of the preceding aspects, wherein the VOC is at least one compound selected from hydrocarbons, alcohols, aldehydes, ketones, ethers, phenols, esters, and organic acids. [1 -7] The composition according to any of the preceding aspects, wherein the VOC is a single compound or a mixture of compounds and is contained in an amount of more than 0.001 mass% (10 ppm) or more than 0.005 mass% (50 ppm) in the composition. [1-8] The composition according to any of the preceding aspects, wherein the additive is a plasticizer containing a volatile organic compound. [2] The composition according to aspect [1], wherein the adsorbent particles are particles of diatomaceous earth, glass or combinations thereof. [2-1] The composition according to aspect [2], wherein the diatomaceous earth falls within embodiment (b). [2-2] The composition according to aspect [2], wherein the glass is a recycled product. [3] The composition according to aspect [1] or [2], wherein the adsorbent particles of the silica-alumina-containing compound have a silica/alumina ratio of 5 to 70. [4] The composition according to any of the preceding aspects, wherein the adsorbent particles of the silica-alumina-containing compound have a silica/alumina ratio of lower than 30. [5] The composition according to any of the preceding aspects, wherein the plasticizer is selected from the group consisting of phthalates, trimellitates, adipates, sebacates, organophosphates, bio-attributed compounds, and bio-based compounds. [6] The composition according to any of the preceding aspects, wherein at least 50 % of the pores of the adsorbent particles have a size of more than 1 nm. [6-1] The composition according to any of the preceding aspects, wherein at least 90 % of the pores have a size of more than 1 nm. [6-2] The composition according to any of the preceding aspects, wherein at least 50 %, preferably at least 90 % of the pores have a size of up to 50 nm. [6-3] The composition according to any of the preceding aspects, wherein the pores have a size of 5 to 50 nm, preferably 10 to 40 nm. [7] The composition according to any of the preceding aspects, wherein the adsorbent particles have a BET specific surface area of at least 1 m2/g. [7-1] The composition according to aspect [7], wherein the BET specific surface area is attributable to the pores described in the preceding aspects. [8] The composition according to any of the preceding aspects, wherein the size of the adsorbent particles is 1 to less than 60 pm. [8-1] The composition according to a