摘要:
New compounds containing isocyanatophenoxy groups, corresponding to ##STR1## wherein R.sup.1 denotes a residue of a n-valent polyhydroxyl compound having a molecular weight of about 92-6000, R.sup.2 denotes hydrogen or methyl group and n denotes an integer of from 3 to 8 were found to be suitable as hardeners in the preparation of adhesives.
摘要:
N,N-disubstituted monourethanes and oligourethanes are produced by reacting (a) N-aliphatically and/or N-cycloaliphatically and/or N-araliphatically substituted monourethanes and/or oligourethanes with an alkylating agent in the presence of a solid alkali metal hydroxide. No solvent need by employed but if a solvent is used, that solvent should be an aprotic organic solvent. The alkali metal hydroxide must be used in an equivalent amount. A phase transfer catalyst may optionally be employed. The N,N-disubstituted urethanes obtained by this process are useful in the production of dyes, pharmaceutical products and thermostable synthetic materials.
摘要:
The present invention relates to N,N-disubstituted compounds containing urethane groups and terminal hydroxyl groups corresponding to the general formula ##STR1## wherein X is the residue of a strong memobasic or polybasic acid remaining after dissociation of the proton or protons of said acid or a hydroxyl group;Y is an n-functional hydrocarbon group having a molecular weight of from about 15 to about 8000 (preferably from about 300 to about 4000) and optionally interrupted by oxygen, sulfur, or silicon atoms, or by ester, carbonate, urea, N-monosubstituted urethane, or N,N-disubstituted urethane groups;1.sub.R hydrogen or a hydrocarbon group having a molecular weight of from about 15 to about 200;2.sub.R is the radical of an alkylating or arylating agent; and is an integer of from 2 to about 6.The present invention further relates to a process for preparing such compounds and to a method for using such compounds in the production of plastics.
摘要:
The present invention thus relates to new compounds containing aminophenoxy end groups corresponding to the formula ##STR1## wherein R.sub.1 denotes an n-valent group as obtained by the removal of hydroxyl groups from an n-valent polyhydroxyl compound having a molecular weight of about 400 to about 12,000, preferably 400 to about 6,000,R.sub.2 denotes an integer with a value from 2 to 8, preferably from 2 to 4.The present invention also relates to a process for the preparation of these compounds containing aminophenoxy end groups by reacting a polyhydroxyl compound with a halogenated nitrobenzene in the presence of an alkaline compound and subsequently hydrogenating the nitrophenoxy adducts obtained to form the corresponding aminophenoxy adducts.Lastly, the present invention relates to the use of the compounds containing aminophenoxy end groups as starting components for the production of polyurethane plastics by the isocyanate polyaddition process.
摘要:
The present invention is directed to new aromatic diamines containing sulfonic acid aryl esters corresponding to the formula ##STR1## wherein R.sub.1 represents hydrogen, an optionally branched C.sub.1 -C.sub.6 alkyl radical (preferably a methyl group), a C.sub.1 -C.sub.6 alkoxy radical or a halogen atom (preferably chlorine) andR.sub.2 and R.sub.3 which may be the same or different, represent hydrogen, an optionally branched C.sub.1 -C.sub.20 (preferably C.sub.1 -C.sub.6) alkyl radical, a C.sub.1 -C.sub.6 alkoxy radical or a halogen atom (preferably chlorine).The present invention is also directed to a process for the production of the above aromatic diamines containing sulfonic acid esters by the reaction of optionally substituted sulfochlorides with optionally substituted phenols followed by hydrogenation.Finally, the present invention is directed to the use of aromatic diamines containing sulfonic acid aryl esters as a synthesis component for the production of polyurethane plastics by the isocyanate polyaddition process.
摘要:
The present invention relates to novel low-monomer low-viscosity high-activity formulations composed of isocyanurate containing isocyanate groups, exclusively based on 2,4-diisocyanatotoluene and phthalate-free plasticizers, to the use thereof as adhesion promoters with improved adhesion for coating compositions based on plasticized polyvinyl chloride, and to coatings and coated substrates.
摘要:
The present invention relates to a process for the phosgenation of amines in the gas phase, in which a specific type of heat exchanger is used for vaporizing the amines.
摘要:
The present invention relates to novel low-monomer-content, low-viscosity, high-activity preparations made of isocyanurates containing isocyanate groups and of phthalate-free plasticizers, to use of the same as adhesion promoters with improved adhesion for coating compositions based on plasticized polyvinyl chloride, and also to coatings and coated substrates.
摘要:
A continuous process for the preparation of highly stable, finely divided, low viscosity polymer polyols of small average particle size wherein in the first step an intermediate is prepared by reacting (1) a mixture of at least two ethylenically unsaturated monomers, preferably styrene and acrylonitrile, in a mixture comprising (2) a base polyol and (3) a macromer in the presence of (4) a free radical initiator, (5) a solvent having moderate chain transfer activity, and, optionally, (6) a reaction moderator at a temperature of at least 100.degree. C., such that the intermediate contains at least about 12% by weight of macromer, based on the weight of the base polyol and macromer, and a solids content of at least about 15% by weight and less than about 30% by weight, based on the weight of the base polyol, macromer and ethylenically unsaturated monomers. The intermediate, which functions as a seed for further polymerization, is then further reacted, in one or more stirred-tank reactors in series, in a mixture of at least two ethylenically unsaturated monomers, preferably styrene and acrylonitrile, in a base polyol and, optionally, a macromer, in the presence of solvent, initiator and a reaction moderator which are distributed among the remaining reactors.
摘要:
A process for the production of stable, agglomerate-free, low viscosity graft copolymer dispersions through radical polymerization of ethylenically unsaturated monomers in the presence of a base polyol, a macromer, an enol ether of a specific formula, and optionally, an organic solvent. These enol ethers correspond to the general formula:A=CH--O--Rwherein:A represents a di-valent residue of the formula ##STR1## R represents an aliphatic hydrocarbon radical having 1 to 18 carbon atoms, a cycloaliphatic hydrocarbon radical having 5 to 10 carbon atoms, or a substituted or unsubstituted benzyl radical;andR' represents a hydrogen atom or an aliphatic hydrocarbon radical having 1 to 8 carbon atoms.