Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1992-08-07
1994-09-06
Krass, Frederick
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
523503, 524539, 524599, 524600, 524601, 524602, 524604, 524606, 524607, 524608, 525 38, 525 42, 525 43, 525 44, 525 47, 525411, 528403, 528405, C09D16708, C09D17902
Patent
active
053448596
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to new water-dilutable binder mixtures based on alkyd resins and poly-N-acyl alkyleneimines, to processes for the production of the new binder mixtures and to their use in oxidatively drying paints.
STATEMENT OF RELATED ART
In principle, lacquers and paints are divided into physically drying systems and chemically drying systems. One form of chemically drying paints are oxidatively drying systems in which a crosslinking reaction is initiated by atmospheric oxygen. The most important oxidatively drying paints now contain binder mixtures based on alkyd resins in which highly unsaturated fatty acids are incorporated by condensation in the form of mixed polyesters. Binder mixtures containing so-called self-emulsifying alkyd resins, i.e. those which, by virtue of incorporated hydrophilic groups, can be emulsified in water without any need for external emulsifiers, are used for water-dilutable paints. Self-emulsifying alkyd resins in which polyethylene glycol is incorporated and of which the residual acid groups have been at least partly neutralized by addition of a base are often used as the binder component. The production of aqueous dispersions of such alkyd resins is described, for example, in DE-PS 28 09 840, in DE-PS 15 95 278 and in German patent application P 39 32 375.7. These aqueous alkyd resin dispersions have excellent stabilities. However, if they are used as sole binder component, these alkyd resin dispersions give water-dilutable paints or coatings which are in need of improvement in regard to their drying properties and in regard to film quality, particularly film hardness.
By contrast, quick-drying films combining high gloss with high hardness values are provided by paints of which the binders are based on poly-N-acyl alkyleneimines, particularly those according to German patent application P 39 00 859.2. However, most of the poly-N-acyl alkyleneimines used there are difficult to emulsify in water. Acceptable emulsifiability in water can only be achieved where poly-N-acyl alkyleneimine mixtures containing more than 50% by weight of ethyl oxazoline are used. However, a binder mixture of this type gives coatings which are extremely sensitive to water.
DESCRIPTION OF THE INVENTION
Object of the Invention
Accordingly, the problem addressed by the present invention was to provide binder mixtures which would advantageously combine the ready emulsifiability of alkyd resins with the favorable drying properties and film quality of poly-N-acyl alkyleneimines and processes for the production of such binder mixtures and to enable them to be used in oxidatively drying paints.
SUMMARY OF THE INVENTION
Accordingly, the present invention relates to water-dilutable binder mixtures suitable for oxidatively drying paints based on alkyd resins in which polyethylene glycol is incorporated and of which the residual acid groups have been at least partly neutralized by addition of bases, characterized in that, together with the alkyd resins, they contain poly-N-acyl alkyleneimines prepared by cationic polymerization of one or more monomers corresponding to general formula I: ##STR1## in which Z is a direct bond or the group >CR.sup.5 R.sup.6, where R.sup.5 and R.sup.6 may be-the same or different and represent H or alkyl containing up to 2 carbon atoms, aromatic or aliphatic radical containing up to 8 carbon atoms, and up to 21 carbon atoms.
The binder mixtures according to the invention are based on alkyd resins which have been produced in known manner from monobasic and polybasic carboxylic acids and/or anhydrides thereof and polyhydric alcohols using polyethylene glycol and which have an acid value of 5 to 25.
DESCRIPTION OF PREFERRED EMBODIMENTS
Preferred alkyd resins are the alkyd resins which can be produced in accordance with German patent application P 39 32 375.7 where particular emphasis is placed on alkyd resins which have been produced from: quantities of 20 to 40% by weight, the fatty acids should contain more than 12 carbon atoms and should
REFERENCES:
patent: 3483141 (1969-12-01), Litt et al.
Eicken Ulrich
Gorzinski Manfred
Gress Wolfgang
Hase Brigitte
Stork Norbert
Henkel Kommanditgesellschaft auf Aktien
Jaeschke Wayne C.
Krass Frederick
Szoke Ernest G.
Wisdom, Jr. Norvell E.
LandOfFree
Water-dilutable binder mixtures based on alkyd resins and poly-n does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Water-dilutable binder mixtures based on alkyd resins and poly-n, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Water-dilutable binder mixtures based on alkyd resins and poly-n will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1329842