Title:
サイズ組成物
Document Type and Number:
Japanese Patent JP4781679
Kind Code:
B2
Abstract:
A sizing agent contains a polyurethane-polyurea (PUR) dispersion which is obtained under specified conditions relating to the presence of amino groups and the amount of chain extenders used by (1) reacting a polyisocyanate with polymeric polyols or polyamines, low molecular weight compounds and isocyanate-reactive hydrophilic compounds optionally in a solvent; (2) adding a solvent or diluting the pre-polymer; and (3) chain extending the product. A sizing agent containing a polyurethane- polyurea (PUR) dispersion, optionally further film-forming resins, optionally crosslinkers and also auxiliaries is such that the PUR is obtained by: (1) reacting a polyisocyanate with (i) polymeric polyols or polyamines of number average molecular weight (M n) 400-8000; (ii) optionally low molecular weight mono- or poly-alcohols, mono- or poly-amines or aminoalcohols of M n 17-400; (iii) isocyanate (NCO)-reactive (potentially) ionic hydrophilic compounds; and (iv) NCO- reactive nonionic hydrophilic compounds optionally in an inert solvent, with the proviso that none of the reactants (i) - (iv) or the solvent contains primary or secondary amino groups; (2) either dissolving the thus-obtained pre-polymer in an aliphatic ketone or, when a solvent has already been used in the preparation, optionally diluting with further aliphatic ketone; and (3) reacting the residual free NCO groups with a chain extender comprising (C1) hydrazine (hydrate) and optionally also (C2) compounds comprising (i) - (iii) or the above inert solvent, the process being such that the following provisos hold: (A) compounds (C2) contain primary and/or secondary amino groups; (B) the total weight of (C1) and (C2) is such that the calculated degree of chain extension is 40-200%; and (C) the (C1) : (C2) ratio is such that >=40% of the free NCO groups are chain extended or terminated by component (C1).
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Inventors:
Torsten Riche
Thomas Feller
Jürgen Mikesner
Thomas Feller
Jürgen Mikesner
Application Number:
JP2005006137A
Publication Date:
September 28, 2011
Filing Date:
January 13, 2005
Export Citation:
Assignee:
Bayer MaterialScience AG
International Classes:
C08G18/10; C03C25/26; D06M15/564; C03C25/32; C03C25/326; C08G18/08; C08G18/12; C08G18/28; C08G18/65; C08G18/70
Domestic Patent References:
| JP62292658A |
Foreign References:
| WO2003060017A1 |
Attorney, Agent or Firm:
Aoyama Aoi
Yasuo Shibata
Kenichi Morizumi
Yasuo Shibata
Kenichi Morizumi