摘要:
The present invention relates to aqueous isocyanate emulsions and their use as binders in the production of shaped articles. These emulsions contain(A) from 80 to 20% by weight, based on the total emulsion, of water;(B) from 18 to 79% by weight, based on the total emulsion, of an organic polyisocyanate;(C) from 0.5 to 15% by weight, based on the total emulsion of a sulfonic acid corresponding to the formula:R.sub.1 --SO.sub.3 H).sub.n whereinn represents the integers 1 or 2, andR.sub.1 represents an aromatic hydrocarbon radical containing from 6 to 14 carbon atoms, an aliphatic hydrocarbon radical containing from 10 to 18 carbon atoms, a cyclo-aliphatic hydrocarbon radical containing from 6 to 15 carbon atoms, an araliphatic hydrocarbon radical containing from 7 to 15 carbon atoms or an alkaromatic hydrocarbon radical containing from 7 to 24 carbon atoms; and(D) from 0 to 10% by weight, based on the polyisocyanate, of a nonionic, surface-active agent as an emulsifier.
摘要:
The present invention relates to aqueous isocyanate emulsions and their use as binders in the production of shaped articles. These emulsions contain(A) from 80 to 20% by weight, based on the total emulsion, of water;(B) from 18 to 79% by weight, based on the total emulsion, of an organic polyisocyanate;(C) from 0.5 to 15% by weight, based on the total emulsion of a sulfonic acid corresponding to the formula:R.sub.1 --SO.sub.3 H).sub.nwhereinn represents the integers 1 or 2, andR.sub.1 represents an aromatic hydrocarbon radical containing from 6 to 14 carbon atoms, an aliphatic hydrocarbon radical containing from 10 to 18 carbon atoms, a cycloaliphatic hydrocarbon radical containing from 6 to 15 carbon atoms, an araliphatic hydrocarbon radical containing from 7 to 15 carbon atoms or an alkaromatic hydrocarbon radical containing from 7 to 24 carbon atoms; and(D) from 0 to 10% by weight, based on the polyisocyanate, of a nonionic, surface-active agent as an emulsifier.
摘要:
The present invention relates to a substantially anhydrous binder having a self-releasing effect for the production of pressed articles comprising:(A) a polyisocyanate; and(B) a sulfonic acid corresponding to the general formula:R--SO.sub.3 H).sub.n whereinn represents an integer of 1 or 2;R represents an aromatic hydrocarbon radical having from 6 to 14 carbon atoms, an aliphatic hydrocarbon radical having from 10 to 18 carbon atoms, a cycloaliphatic hydrocarbon radical having from 6 to 15 carbon atoms, an araliphatic hydrocarbon radical having from 7 to 15 carbon atoms or an alkaromatic hydrocarbon radical having from 7 to 24 carbon atoms; and the equivalent ratio of the components (A) and (B) is 100:0.5 to 100:20.The invention is also directed to the use of such binders in the production of shaped articles by the hot pressing of a wide variety of organic and/or inorganic materials.
摘要:
The present invention relates to a substantially anhydrous binder having a self-releasing effect for the production of pressed articles comprising:(A) a polyisocyanate; and(B) a sulfonic acid corresponding to the general formula:R--SO.sub.3 H).sub.n whereinn represents an integer of 1 or 2;R represents an aromatic hydrocarbon radical having from 6 to 14 carbon atoms, an aliphatic hydrocarbon radical having from 10 to 18 carbon atoms, a cycloaliphatic hydrocarbon radical having from 6 to 15 carbon atoms, an araliphatic hydrocarbon radical having from 7 to 15 carbon atoms or an alkaromatic hydrocarbon radical having from 7 to 24 carbon atoms; andthe equivalent ratio of the components (A) and (B) is 100:0.5 to 100:20.The invention is also directed to the use of such binders in the production of shaped articles by the hot pressing of a wide variety of organic and/or inorganic materials.
摘要:
The present invention is directed to monoformylated 3,3'-diaminodipropylamine mixtures corresponding to formulae I and II ##STR1## The present invention is also directed to a process for the production of these mixtures by reacting acrylonitrile and formamide in the presence of a 4-aminopyridine derivative to form N,N-bis-(2-cyanoethyl)-formamide which is then hydrogenated to the monoformylated 3,3'-diaminopropylamine mixture corresponding to formulae I and II.Finally, the present invention is also directed to the use of these mixtures as chain extending agents for the preparation of polyurethanes by the polyisocyanate polyaddition process.
摘要:
The present invention relates to a process for the conditioning and/or purification of organic isocyanates bya) mixing organic isocyanates at 20.degree. to 150.degree. C. with 0.001 to 1 mole %, based on the isocyanate, of a silylated acid corresponding to the formulaX-[Si(CH.sub.3).sub.3 ].sub.n whereinX represents the neutral acid residue obtained by removing the acidic hydrogen atoms from an n-basic acid having a pKa value of at most 3, with the exception of hydrohalic acids andn is an integer from 1 to 3, andb) optionally working up the resulting mixture by distillation after a residence time of at least 5 minutes.
摘要:
The present invention relates to liquid storable organic isocyanates containing carbodiimide and/or uretone imine groups prepared by(a) partially carbodiimidizing isocyanate groups of an organic isocyanate with catalysts of the phospholine type, and(b) terminating the carbodiimidization reaction by the addition of a silylated acid corresponding to the formulaX--[Si(CH.sub.3).sub.3 ].sub.n in whichX represents the neutral acid residue obtained by removal of the acidic hydrogen atoms from an n-basic acid having a pK.sub.a value of at most 3, other than a hydrohalic acid, andn is an integer of 1 to 3.The invention further relates to the use of the liquid polyisocyanate mixtures according to the invention for the preparation of polyurethane plastics, preferably polyurethane foams, having improved burning behavior.
摘要:
This invention relates to an improved process for the preparation of urethanes by the reaction of aromatic nitro compounds with alcohols and carbon monoxides in the presence of catalyst systems containing sulphur and/or selenium and/or compounds of these elements.
摘要:
The instant invention relates to an improved process for the preparation of urethanes by the reaction of aromatic nitro compounds with alcohols and carbon monoxide in the presence of catalyst systems which contain selenium.
摘要:
The present invention relates to a process for preparing polyisocyanates containing isocyanurate groups by trimerizing a portion of the isocyanate groups of an organic polyisocyanate component containing a) one or more diisocyanates corresponding to formula (1) ##STR1## wherein R represents a saturated, straight-chain, aliphatic hydrocarbon group having 8 to 15 carbon atoms and optionally b) up to 95 NCO equivalent-%, based on the total equivalents a) and b), of one or more organic polyisocyanates other than a), in the presence of trimerization catalysts and terminating the trimerization reaction at any desired degree of trimerization. The invention also relates to the polyisocyanates containing isocyanurate groups obtained by this process and to their use, optionally in excess starting polyisocyanates and optionally blocked with blocking agents for isocyanate groups, as an isocyanate component for preparing polyisocyanate addition products.