Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From aldehyde or derivative thereof as reactant
Patent
1998-01-29
1999-08-17
Truong, Duc
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From aldehyde or derivative thereof as reactant
528129, 528163, 528230, 264 458, 264 468, C08G 1230
Patent
active
059395150
DESCRIPTION:
BRIEF SUMMARY
The invention relates to condensation products obtainable by condensation of a mixture comprising as essential components ##STR3## where X, X' and X" are each selected from the group consisting of --NH.sub.2, --NHR and --NRR', and X, X' and X" are not all --NH.sub.2, and R and R' are each selected from the group consisting of hydroxy-C.sub.2 -C.sub.10 -alkyl, hydroxy-C.sub.2 -C.sub.4 -alkyl(oxa-C.sub.2 -C.sub.4 -alkyl).sub.n, where n is from 1 to 5, and amino-C.sub.2 -C.sub.12 -alkyl, or mixtures of melamines I, and general formula II ##STR4## where R" is methyl or phenyl, Z' and Z" are each selected from the group consisting of --NH.sub.2, --NHR.sup.III and NR.sup.III R.sup.IV, and R.sup.III and R.sup.IV are each selected from the group consisting of hydroxy-C.sub.2 -C.sub.10 -alkyl, hydroxy-C.sub.2 -C.sub.4 -alkyl-(oxa-C.sub.2 -C.sub.4 -alkyl).sub.n, where n is from 1 to 5, --CH.sub.2 CH.sub.2 --S--CH.sub.2 CH.sub.2 OH, and amino-C.sub.2 -C.sub.12 -alkyl, or mixtures of triazines II, and which are unsubstituted or are substituted by radicals selected from the group consisting of C.sub.1 -C.sub.9 -alkyl and hydroxyl, C.sub.1 -C.sub.4 -alkanes substituted by two or three phenol groups, di(hydroxyphenyl) sulfones or mixtures of these phenols, melamine, substituted melamine I or triazine II to formaldehyde within the range from 1:1.15 to 1:4.5.
The invention further relates to a process for producing these condensation products, their use for producing fibers and foams, and molded articles obtainable from these products.
EP-A-523 485 describes condensation products obtainable by condensation of a mixture comprising as essential components ##STR5## where X, X' and X" are each selected from the group consisting of --NH.sub.2, --NHR and --NRR', and X, X' and X" are not all --NH.sub.2, and R and R' are each selected from the group consisting of hydroxy-C.sub.2 -C.sub.4 -alkyl-, hydroxy-C.sub.2 -C.sub.4 -alkyl(oxa-C.sub.2 -C.sub.4 -alkyl).sub.n, where n is from 1 to 5, and amino-C.sub.2 -C.sub.12 -alkyl, or mixtures of melamines I, and unsubstituted or are substituted by radicals selected from the group consisting of C.sub.1 -C.sub.9 -alkyl and hydroxyl, C.sub.1 -C.sub.4 -alkanes substituted by two or three phenol groups, di(hydroxyphenyl) sulfones or mixtures of these phenols, melamines to formaldehyde within the range from 1:1.15 to 1:4.5, their use for producing fibers and foams, and molded articles obtainable from these products. The disadvantage of the fibers of EP-A-523 485 is that they lack extensibility.
It is an object of the present invention to provide melamineformaldehyde condensation products possessing improved fiber extensibility in the cured state.
We have found that this object is achieved by the above-defined condensation products.
We have also found a process for producing these condensation products, their use for producing fibers and foams, and also molded articles obtainable from these products.
The melamine resins of the invention include as monomeric building block (A) from 90 to 99.9 mol % of a mixture consisting essentially of from 30 to 100, preferably 50 to 99, particularly preferably from 85 to 95, mol % of melamine and from 0 to 70, preferably from 1 to 50, particularly preferably from 5 to 15, mol % of a substituted melamine I or mixtures of substituted melamines I and also from 1 to 70, preferably from 1 to 40, particularly preferably from 1 to 25, mol %, based on (a)+(b), of a substituted triazine II.
As further monomeric building block (B) the melamine resins include from 0.1 to 10 mol %, based on the total number of moles of monomeric building blocks (A) (a), (A) (b) and (B), of a phenol or of a mixture of phenols.
The condensation products of the invention are obtainable by reacting the components (A) and (B) with formaldehyde or formaldehyde-supplying compounds in a molar ratio of melamine, substituted melamine I and triazine II to formaldehyde within the range from 1:1.15 to 1:4.5, preferably from 1:1.8 to 1:3.0.
Suitable substituted melamines of the general formula I ##STR6#
REFERENCES:
patent: 4088620 (1978-05-01), Nihongi et al.
patent: 5322915 (1994-06-01), Weiser et al.
Houben-Weyl, Bd. 14/2, S. 357 (no date).
Guenther Erhard
Reuther Wolfgang
BASF - Aktiengesellschaft
Truong Duc
LandOfFree
Modified melamine-formaldehyde resins does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Modified melamine-formaldehyde resins, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modified melamine-formaldehyde resins will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-315696