Polyacetal resins with reduced formaldehyde odor

C - Chemistry – Metallurgy – 08 – K

Patent

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Details

C08K 5/00 (2006.01) C08K 5/17 (2006.01) C08K 5/3415 (2006.01) C08K 5/3445 (2006.01) C08L 59/00 (2006.01)

Patent

CA 2364654

Incorporation of an odor-reducing additive selected from the group consisting of: (i) a low molecular weight primary or secondary amino compound of low volatility, containing at least one amino group and two or more carbon atoms and having a weak basicity of Pkb in the range of 2 - 8; (ii) succinimide; (iii) anthranilic acid; (iv) 4-amino benzonic acid, and mixtures thereof, into a polyacetal resin to reduce its formaldehyde odor. A combination of the odor- reducing additive with a weak acidic imino was found to have a synergistic effect in further reducing the formaldehyde odor.

Selon l'invention, un additif réducteur d'odeurs sélectionné dans le groupe constitué par: i) un composé aminé primaire ou secondaire de faible masse moléculaire, peu volatil, contenant au moins un groupe aminé et deux ou plusieurs atomes de carbone et présentant un Pkb de faible basicité de l'ordre de 2 à 8: ii) un succinimide; iii) un acide anthranilique; iv) un acide 4-amino benzoïque et des mélanges desdits produits, est incorporé dans une résine polyacétalique pour en diminuer l'odeur de formaldéhyde. L'association de l'additif réducteur d'odeurs et d'un imino acide faible est réputée avoir un effet synergique pouvant réduire davantage l'odeur de formaldéhyde.

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