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Résultats pour
 brevets
1.
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PROCESS FOR THE PRODUCTION OF SIZED AND/OR WET-STRENGTH PAPERS, PAPERBOARDS AND CARDBOARDS
| Numéro de document |
02822324 |
| Statut |
Délivré - en vigueur |
| Date de dépôt |
2011-12-19 |
| Date de disponibilité au public |
2012-06-28 |
| Date d'octroi |
2019-03-12 |
| Propriétaire |
- BAYER MATERIALSCIENCE LLC (USA)
- BAYER INTELLECTUAL PROPERTY GMBH (Allemagne)
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| Inventeur(s) |
- Sommer, Stefan
- Luehmann, Erhard
- Dvorchak, Michael J.
- Unal, Serkan
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Abrégé
The present invention relates to a process for the production of sized and/or wet- strength papers, paperboards or cardboards, wherein an aqueous radiation-curable dispersion containing water and at least one polymer, characterized in that the polymer contains cationic groups, is mixed with suspended wood pulp and/or chemical pulp and this mixture is sieved, pressed, thermally dried and then radiation-cured, characterized in that the dispersion is employed in amounts, based on its non-aqueous content in relation to the solid content of the wood pulp and/or chemical pulp, of from 0.001 to 10 wt.%, the papers, paperboards and cardboards produced by this process, and compositions comprising suspended wood pulp and/or chemical pulp and an aqueous radiation-curable dispersion containing at least one polymer, characterized in that the polymer contains cationic groups.
Classes IPC ?
- D21H 21/16 - Agents de collage ou hydrophobes
- D21H 17/44 - Composés macromoléculaires synthétiques obtenus par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carbone contenant des groupes ioniques cationiques
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2.
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LOW TEMPERATURE CURING POLYURETDIONE COMPOSITIONS
| Numéro de document |
02792995 |
| Statut |
Délivré - en vigueur |
| Date de dépôt |
2011-03-15 |
| Date de disponibilité au public |
2011-09-22 |
| Date d'octroi |
2018-07-03 |
| Propriétaire |
- BAYER MATERIALSCIENCE LLC (USA)
- BAYER MATERIALSCIENCE AG (Allemagne)
- PPG INDUSTRIES OHIO, INC. (USA)
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| Inventeur(s) |
- Shaffer, Myron W.
- Ekin, Abdullah
- Kinney, Carol L.
- Greszta-Franz, Dorota
- Martz, Jonathan T.
- Deng, Jun
- Hayes, Deborah E.
- Thomas, Stephen J.
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Abrégé
Composition and process for low temperature curing of polyuretdione-polyol compositions in which the polyuretdione is prepared from a polyisocyanate with isocyanate groups and a polyol containing primary hydroxyl groups. The catalyst for the composition and process is an amine catalyst containing the group -N=C-N-, being aprotic, having a pKa greater than 20 and upon addition to the liquid coating composition causing a phase-change of the coating composition from liquid to solid at 250C and 1atm. within one week.
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3.
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IMPROVED PROCESS FOR THE PRODUCTION OF CARBODIIMIDE MODIFIED ORGANIC ISOCYANATES
| Numéro de document |
02509861 |
| Statut |
Délivré - en vigueur |
| Date de dépôt |
2005-06-13 |
| Date de disponibilité au public |
2005-12-17 |
| Date d'octroi |
2013-08-13 |
| Propriétaire |
BAYER MATERIALSCIENCE LLC (USA)
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| Inventeur(s) |
- Rosthauser, James W.
- Garrett, James Thomas
- Bolton, Jeffrey S.
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Abrégé
The present invention relates to an improved process for the production of carbodiimide modified organic isocyanate, preferably a polymethylene polyphenylisocyanate, and most preferably diphenylmethane diisocyanate. This process includes (1 ) neutralizing acidic impurities in an organic isocyanate, (2) partially carbodiimidizing isocyanate groups of the neutralized organic isocyanate, and (3) terminating the carbodiimidization reaction.
Classes IPC ?
- C08G 18/02 - Polymérisats d'isocyanates ou d'isothiocyanates d'isocyanates ou d'isothiocyanates uniquement
- C07C 267/00 - Diimides carboniques
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