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AssigneeBayer Aktiengesellschaft
InventorsThorsten Rische, Karin Naujoks, Jurgen Meixner, Thomas Feller, Eberhard Konig
Estimating the term…
The present invention relates to a binder composition containing A) at least one aqueous polyurethane-polyurea dispersion and B) at least one stabilizer containing a) at least one amine having a structural unit corresponding to formula (I) 1 which has no hydrazide groups, b) at least one compound having a structural unit corresponding to formula (II) —CO—NH—NH— (II) and c) optionally a stabilizing compound other than a) and b). The polyurethane dispersions are manufactured in the presence of components a) and b). It is possible for components a) and b), depending on the grade used, to be incorporated into the polymer framework as structural units. For this reason binder compositions comprising A) at least one aqueous polyurethane dispersion, containing structural units of at least one stabilizing agent or mixture of stabilizing agents B) based on a) at least one amine with the general formula (I), 2 which has no hydrazide groups, b) at least one compound with the general formula (II), —CO—NH—NH— (II) and c) optionally a stabilizing compound other than a) and b). are also the subject matter of the invention in question. The present invention also relates to a process for the preparation of these binder compositions. Further, the present invention relates to coating, adhesive and sizing compositions containing the binder compositions according to the invention. Finally, the present invention also relates to glass fibers sized with sizing compositions containing the binder compositions according to the invention.
A binder composition comprising
A binder composition comprising
Dependencies are inferred from the claim text.
From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers: polyurethanes
Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step: using…
Monohydroxy compounds: compounds containing ether groups, e.g. oxyalkylated monohydroxy compounds
Containing -N-C=O groups: containing hydrazide or semi-carbazide groups
Term end not estimated
The present invention relates to aqueous polyurethane-polyurea dispersions which are stabilized with respect to thermal yellowing, and to their preparation and use.
In the coating of substrates, aqueous binders, in particular polyurethane-polyurea (PU) dispersions, are increasingly being used. In some applications high temperatures, which lead to undesired yellowing of the coating, are required for drying the coatings.
In the area of sizing of glass fibers, PU dispersions are used as aqueous binders. Due to the comparatively high temperatures in the coating and drying processes and in the compounding of the sized glass fibers into a plastics matrix, thermal yellowing of the coatings produced often occurs and is undesired.
Compounds Used:
Diaminosulphonate: NH2—CH2CH2—NH—CH2CH2—SO3Na (45% in water)
Determination of Thermal Yellowing: