摘要:
The present invention is directed to isocyanato isocyanurates prepared from diisocyanates which contain a sterically unhindered isocyanate group bound to a primary aliphatic carbon atom and a sterically hindered isocyanate group which is bound to a tertiary carbon atom forming part of a cycloaliphatic ring system, said diisocyanate having an NCO content of about 20 to 50% by weight. The present invention is further directed to a process for preparing these isocyanato isocyanurates by catalytic trimerization and the use of the isocyanato isocyanurates in a process for the production of polyisocyanate polyaddition products, preferably two-component polyurethane stoving lacquers.
摘要:
The present invention relates to a powder lacquer containing a mixture of(A) a polyisocyanate component in power form which is solid below about 40.degree. C. and liquid above about 150.degree. C. and(B) a organic polyhydroxyl component in powder form which is solid below about 40.degree. C. and liquid above about 150.degree. C.,components (A) and (B) being present in quantities corresponding to an equivalent ratio of isocyanate groups to hydroxyl groups of about 0.6:1 to 1.2:1, characterized in that component (A) is based on a polyisocyanate or polyisocyanate mixture which(a) does not contain any blocking agents for isocyanate groups,(b) has a content of free isocyanate groups (expressed as NCO) attached to tertiary, aliphatic or cycloaliphatic carbon atoms of about 8 to 24% by weight and an average NCO functionality of at least 2.1,(c) has a urethane group content (expressed as --NH--CO--O--) of about 3 to 30% by weight and(d) has an isocyanurate group content (expressed as C.sub.3 N.sub.3 O.sub.3) of 0 to about 30% by weight.The present invention also relates to the use of this powder lacquer for the production of coatings on heat-resistant substrates by methods known in powder lacquer technology.
摘要翻译:本发明涉及一种粉末漆,其含有(A)固体低于约40℃的功率形式的多异氰酸酯组分和高于约150℃的液体的混合物和(B)粉末形式的有机多羟基组分, 固体低于约40℃,液体高于约150℃,组分(A)和(B)的存在量相当于异氰酸酯基与羟基的当量比为约0.6:1至1.2:1, 其特征在于组分(A)是基于多异氰酸酯或多异氰酸酯混合物,其中(a)不含任何异氰酸酯基团的封端剂,(b)具有连接到叔脂族或叔碳原子上的游离异氰酸酯基团(表示为NCO) 约8至24重量%的脂环族碳原子和平均NCO官能度至少为2.1,(c)具有约3至30重量%的氨基甲酸酯基含量(表示为-NH-CO-O-)和( d)具有0至约的异氰脲酸酯基含量(表示为C 3 N 3 O 3) 30重量%。 本发明还涉及这种粉末漆用于通过粉末漆技术中已知的方法在耐热基材上生产涂层的用途。
摘要:
The present invention is directed to a process for the production of polyisocyanates containing isocyanurate groups by trimerizing a mixture of aliphatic-cycloaliphatic diisocyanates having a sterically unhindered isocyanate group bound to a primary aliphatic carbon atom and a sterically hindered isocyanate group bound to a tertiary carbon atom which forms a part of a cycloaliphatic ring system and 1,6-diisocyanatohexane. The present invention is also directed to the polyisocyanates containing isocyanurate groups produced according to this process and to their use, optionally in blocked form, as an isocyanate component in the production of polyisocyanate polyaddition products, preferably polyurethane lacquers.
摘要:
The present invention is directed to a process for the production of prepolymers containing free tertiary isocyanate groups by reacting(a) an organic diisocyanate containing one isocyanate group attached to a primary aliphatic carbon atom and an isocyanate group attached to a tertiary aliphatic or cycloaliphatic carbon atom with(b) a polyester polyol having a molecular weight of 800 to 12,000 and a hydroxyl functionality of 2 to 6 at an NCO/OH equivalent ratio of 1.6:1 to 2:1 to provide prepolymers having a molecular weight of about 1000 to 3000 and an NCO content of about 4 to 12%.The present invention is also directed to the prepolymers containing free isocyanate groups obtained by this process and to their use for the production of polyurethane lacquers and coatings.
摘要:
The present invention relates to a process for the preparation of polyurethanes suitable for use as thickeners for aqueous compositions by reacting at an NCO/OH equivalent ratio of 0.9:1 to 1.2:1a) a polyether component having an OH number of 10 to 30 mg KOH/g and obtained by the alkoxylation of a mixture ofa1) 30 to 80 mole % of a monofunctional alcohol or alkylphenol having 8 to 30 carbon atoms,a2) 2 to 10 mole % of sodium hydroxide or potassium hydroxide,a3) 10 to 60 mole % of water anda4) 0 to 10 mole % of a trihydric to hexahydric alcohol having a molecular weight of 92 to 600, with ethylene oxide or a mixture of ethylene oxide with up to 20 mole %, based on the total moles of alkylene oxides, of propylene oxide, in which the percentages of a1) to a4) add up to 100,withb) a polyisocyanate component containing at least one organic diisocyanate, optionally in admixture with up to 20 mole %, based on the total moles of component b), of higher than difunctional polyisocyanates.The invention also relates to the polyurethanes obtainable by this method and their use, optionally in combination with other thickeners, for the thickening of aqueous systems.
摘要:
The invention relates to a cooking arrangement (1) comprising a cooking hob (2) which is arranged on a worktop (3), wherein the cooking hob (2) is supported on the worktop (3) by means of a carrier frame (4), wherein the cooking hob (2) has a vertical height (H) and a bottom member (6) with a bottom surface which is directed vertically downwards and wherein the worktop (3) has a top surface (7) which is directed vertically upwards. To allow an arrangement of the cooking hob (2) without machining a cutout into the worktop (3) the invention proposes that the carrier frame (4) is designed to support the cooking hob (2) in such a way that the bottom surface of the bottom member (6) is positioned in a vertical height equal or above (x) the vertical height of the top surface (7) of the worktop (3).
摘要:
The invention relates to a vehicle door system with two vehicle doors, with a vehicle body which encloses a passenger compartment and has a common vehicle door opening for the two vehicle doors, wherein, for closing the door opening, the vehicle doors being movable in a manner such that they move from an open position into a closed position and relative to each other and, in the closed position, each are adjacent to the other in a connecting region via a connecting end side, and with impact protection which has stiffening elements for stiffening the vehicle doors in the vehicle opening, and wherein at least one first stiffening element is arranged in the connecting region of the one vehicle door and at least one stiffening element is arranged in the connecting region of the other vehicle door.
摘要:
The present application in particular is directed to an induction coil assembly 2 adapted for an electric induction hob of a household or industrial type appliance. The induction coil assembly 2 comprises at least one induction coil 5 which has at least one of ovoid and coiled ovoid windings 6.
摘要:
A honing machine for super finishing workpieces, e.g. by honing using a tool spindle (7), can be rotatably driven and can receive a tool. A motor rotates the tool spindle, the tool spindle (12) being arranged on a carriage (12), which can be displaced on a machine frame (16), by means of a drive device, in the direction of the rotational axis of the tool spindle. The drive device consists of a flat primary part (13) and a secondary part (17) of an electric linear motor (18), the secondary part being linearly displaceable along the primary part. One (13) of the components primary part/secondary part (13, 17) of the linear motor (18) is disposed on the machine frame (16), and the other (17) on the carriage (12).
摘要:
The present invention relates to a process for cleaning multi-product production plants for polyester polyols with a cleaning polyol. The cleaning polyol can be used as a raw material in the production of further polyols.