摘要:
The use of polyisocyanates as binders in the preparation of particle boards is subject to the drawback that the boards exhibit a tendency to adhere to the face of the platens used in their formation. This problem is minimized by utilizing, in association with the polyisocyanate to be used as binder, minor amounts of one or more phosphates or thiophosphates of the formula: ##STR1## where R=alkyl (C.sub.3 and higher), alkenyl (C.sub.3 and higher), aryl, alkyl-substituted aryl, ##STR2## (where R.sub.2 is alkyl, aryl, or alkyl-substituted aryl, A and B are H, methyl, chloromethyl, 2,2,2-trichloromethyl, m=1-25) and lower-alkyl substituted by from 1 to 2 acyloxy groups where acyl is the residue of an aliphatic carboxylic acid having at least 2 carbon atoms; R.sub.1 is Cl, Br, lower-alkoxy, lower-alkylmercapto, arylamino, mono(lower-alkyl)amino, di(lower-alkyl)amino, hydroxy(lower-alkylene)oxy, aryloxy, hydrocarbylureido, and an enol residue; X=O or S and n=1 or 2. The polyisocyanates and the phosphates or thiophosphates are applied to the particles separately, or after preblending one with the other. Whether the components are applied separately or in combination one with the other, they can each be applied either neat or in the form of an emulsion or emulsions.
摘要翻译:在制备刨花板时使用多异氰酸酯作为粘合剂具有这样的缺点:板表现出粘附在其形成中使用的压板的表面的倾向。 通过利用与用作粘合剂的多异氰酸酯相关联的少量一种或多种下式的磷酸酯或硫代磷酸酯,其中R =烷基(C3及更高),烯基(C3及更高级) ,芳基,烷基取代的芳基,其中R 2是烷基,芳基或烷基取代的芳基,A和B是H,甲基,氯甲基,2,2,2-三氯甲基,m = 1-25)和 被1至2个酰氧基取代的低级烷基,其中酰基是具有至少2个碳原子的脂族羧酸的残基; R 1是Cl,Br,低级烷氧基,低级烷基巯基,芳基氨基,单(低级 - 烷基)氨基,二(低级 - 烷基)氨基,羟基(低级亚烷基)氧基,芳氧基,烃基脲基和烯醇残基; X = O或S,n = 1或2.多异氰酸酯和磷酸酯或硫代磷酸酯分别施加到颗粒上,或在与另一种预混合之后。 组分是单独使用还是与另一种组合使用,它们各自可以整齐地或以乳液或乳液的形式施用。
摘要:
A novel aliphatic diisocyanate, namely 1,4-bis(2-isocyanatoethyl)cyclohexane, is disclosed. Polyurethanes derived from this diisocyanate exhibit advantageous properties. Illustratively, polyurethane elastomers prepared from the above diisocyanate, a polymeric diol and a low molecular weight diol extender, possess significantly improved resilience properties and are useful in the preparation of automobile bumpers, fenders and the like.
摘要:
Novel bis cyclic ureas are disclosed having the formula ##STR1## wherein C.sub.n H.sub.2 n represents alkylene from 4 to 12 inclusive and provided there are at least 4 carbon atoms in succession in the chain and R is the residue obtained by the removal of both halogen atoms from a diacid halide.The bis cyclic ureas are easily converted to a novel class of aliphatic diisocyanates simply by heating. Alternatively, they are blended with polymeric polyols to form one-component storage stable compositions which are thermally converted to polyurethane resins without any significant volatile or side product formation.
摘要翻译:公开了具有式“IMAGE”的新型双环脲,其中C n H 2n表示4至12的亚烷基,并且在链中连续地具有至少4个碳原子,R是通过从 二酸卤化物。 双环脲可以简单地通过加热转化成新一类的脂族二异氰酸酯。 或者,它们与聚合多元醇共混以形成单组分储存稳定的组合物,其被热转化为聚氨酯树脂,而没有任何显着的挥发性或副产物形成。
摘要:
A novel aliphatic diisocyanate, namely 1,4-bis(2-isocyanatoethyl)cyclohexane, is disclosed. Polyurethanes derived from this diisocyanate exhibit advantageous properties. Illustratively, polyurethane elastomers prepared from the above diisocyanate, a polymeric diol and a low molecular weight diol extender, possess significantly improved resilience properties and are useful in the preparation of automobile bumpers, fenders and the like.
摘要:
A novel process is disclosed for the preparation of cyclic ureas having the formula ##STR1## wherein A is a straight chain alkylene radical of 2 to 4 carbon atoms, inclusive, wherein said alkylene radical can be substituted by at least one member selected from the group consisting of halogen, lower alkyl, lower alkoxy, aryl, aryloxy, aralkyl, and cycloaklyl. An alkylene diamine having the formula NH.sub.2 ANH.sub.2, wherein A is defined as above, is reacted in a solvent with carbonyl sulfide to form the corresponding N-(.omega.-aminoalkyl)thiocarbamic acid (NH.sub.2 ANHCOSH) or zwitterion thereof. The thiocarbamic acid is then heated to form the cyclic urea.The cyclic ureas are useful as cross-linkers and extenders in polyurethane formulations, and those ureas having 4 carbons in the alkylene chain find particular utility in the production of bis cyclic ureas which serve as masked isocyanate compounds in one-component polyurethane elastomer formulations.
摘要:
Novel bis cyclic ureas are disclosed having the formula ##STR1## WHEREIN C.sub.n H.sub.2 n represents alkylene from 4 to 12 inclusive and provided there are at least 4 carbon atoms in succession in the chain and R is the residue obtained by the removal of both halogen atoms from a diacid halide.The bis cyclic ureas are easily converted to a novel class of aliphatic diisocyanates simply by heating. Alternatively, they are blended with polymeric polyols to form one-component storage stable compositions which are thermally converted to polyurethane resins without any significant volatile or side product formation.
摘要翻译:公开了具有下式的新型双环脲:其中C n H 2n表示包含4至12的亚烷基,并且在链中连续地具有至少4个碳原子,R是通过从卤素原子中除去两个卤素原子获得的残基 二酸卤化物。
摘要:
1,3-alkylene-diazetidinediones-2,4, wherein alkylene contains at least 8 carbon atoms, are described. These compounds, which can be regarded as intramolecular dimers of alkylene diisocyanates, give rise to the latter on heating. Accordingly, these compounds are useful in a variety of situations in which it is desirable to have a compound which is stable on storage in admixture with other compounds such as polyols, polyamines and the like (which latter would react with a compound containing free isocyanate groups) but which can, at any desired moment, be converted by heating to the free diisocyanate. The latter then reacts with the other component(s) of the mixture to form a polymer.The above compounds are derived by cyclization of the appropriate cyclic allophanoyl halide.
摘要:
Novel bis cyclic ureas are disclosed having the formula ##STR1## wherein C.sub.n H.sub.a n represents alkylene from 4 to 12 inclusive and provided there are at least 4 carbon atoms in succession in the chain and R is the residue obtained by the removal of both halogen atoms from a diacid halide.The bis cyclic ureas are easily converted to a novel class of aliphatic diisocyanates simply by heating. Alternatively, they are blended with polymeric polyols to form one-component storage stable compositions which are thermally converted to polyurethane resins without any significant volatile or side product formation.
摘要翻译:公开了具有式“IMAGE”的新型双环脲,其中C n Han表示4至12的亚烷基,并且在链中连续地具有至少4个碳原子,R是通过从 二酸卤化物。 双环脲可以简单地通过加热转化成新一类的脂族二异氰酸酯。 或者,它们与聚合多元醇共混以形成单组分储存稳定的组合物,其被热转化为聚氨酯树脂,而没有任何显着的挥发性或副产物形成。
摘要:
Novel araliphatic diisocyanates having the formulaOCN(CH.sub.2).sub.3 OArX(CH.sub.2).sub.3 NCOare disclosed wherein X is oxygen or a single bond and Ar is an arylene radical. The araliphatic diisocyanates are prepared from well known and readily obtainable starting materials. When X represents a single bond, the starting material is a monohydric phenol wherein a C-alkylation reaction followed by an O-alkylation reaction with acrylonitrile provides an intermediate dipropionitrile which is converted to the diisocyanate via phosgenation of the corresponding diamine. When X represents oxygen, the starting material is a dihydric phenol wherein O-alkylation with acrylonitrile provides the dipropionitrile which in turn is converted to the diisocyanate via the phosgenation of the corresponding diamine. The diisocyanates find particular utility in the preparation of color and light stable polyurethane products.
摘要:
Disclosed are new coatings compositions based on an HDI isocyanurate or biuret polyisocyanate and a bis(imine) reaction product of a diaminoalkane containing between two and five carbon atoms with an alkyl aldehyde containing between four and seven carbon atoms (advantageously a bis(imine) product of the reaction of 1,4-diaminobutane and isobutyraldehyde). The latter bis(imine) is completely miscible in HDI isocyanurate and biuret polyisocyanates, and, as a reactive diluent, allows the preparation of high performance coatings formulations that require only small amounts of solvents to achieve a conveniently sprayable viscosity.