摘要:
A Taylor reactor (1) according to FIG. 1, comprising 1. an annular reaction volume (2) which widens in the flow direction and is defined by an outer reactor wall (3), a rotor (4) which is mounted rotatably at the end (4.1) in the reactor floor (5) and at its other end (4.2) is unmounted, and a reactor floor (5) having a seal (6) for the drive shaft (7), 2. an inlet region (8) above the reactor floor (5), having at least one side feed (8.1) and/or at least one feed (8.1) through the reactor floor (5) for the reactants and/or the process media, 3. an outlet region (9) which is disposed above the annular reaction volume (2), widens further beyond the annular reaction volume (2) in the flow direction, and subsequently tapers toward a product offtake (10), 4. a product offtake (10) which at its greatest diameter opens toward the outlet region (9) and tapers in the other direction, and 5. a pressure maintenance valve (11); and its use for continuous bulk polymerization.
摘要:
A Taylor reactor (1) according to FIG. 1, comprising 1. an annular reaction volume (2) which widens in the flow direction and is defined by an outer reactor wall (3), a rotor (4) which is mounted rotatably at the end (4.1) in the reactor floor (5) and at its other end (4.2) is unmounted, and a reactor floor (5) having a seal (6) for the drive shaft (7), 2. an inlet region (8) above the reactor floor (5), having at least one side feed (8.1) and/or at least one feed (8.1) through the reactor floor (5) for the reactants and/or the process media, 3. an outlet region (9) which is disposed above the annular reaction volume (2), widens further beyond the annular reaction volume (2) in the flow direction, and subsequently tapers toward a product offtake (10), 4. a product offtake (10) which at its greatest diameter opens toward the outlet region (9) and tapers in the other direction, and 5. a pressure maintenance valve (11); and its use for continuous bulk polymerization.
摘要:
The present invention relates to a coating composition comprising(A) at least one hydroxyl-containing component which [lacuna] of(A1) from 5 to 60% by weight of at least one polyester and(A2) from 40 to 95% by weight of at least one polyacrylate resin which has been prepared at least partially in the presence of component (A1) and(B) at least one crosslinking agent, characterized in that component (A2) is obtainable from the monomer units:(a) a cycloaliphatic ester of (meth)acrylic acid,(b) a hydroxyl-containing alkyl ester of (meth)acrylic acid,(c) a monomer which is different from (a) and (b) and has at least two polymerizable, olefinically unsaturated double bonds,(d) optionally a further hydroxyl-containing, ethylenically unsaturated monomer which is different from (a), (b) and (c),(e) an aliphatic ester of (meth)acrylic acid which is different from (a), (b), (c) and (d),(f) a vinyl-aromatic hydrocarbon which is different from (a), (b), (c), (d) and (e), and(g) a further ethylenically unsaturated monomer which is different from (a), (b), (c), (d), (e) and (f).
摘要:
Disclosed herein is a powder coating suspension prepared in the presence of an emulsifier (A) by emulsifying a liquid component (B) in an aqueous medium (C) to give an aqueous emulsion of liquid particles (D); and cooling the emulsion of liquid particles (D); wherein the emulsifier (A) has a hydroxyl number of 50 to 250 mg KOH/g and is a copolymer prepared by copolymerizing in an aqueous medium (a1) a hydroxyl-containing, olefinically unsaturated monomer; and (a2) an olefinically unsaturated monomer selected from the group consisting of (a21) a monomer of the general formula R1R2C═CR3R4, wherein R1, R2, R3, and R4 are independently hydrogen atoms or substituted or unsubstituted alkyl, cycloalkyl, alkylcycloalkyl, cycloalkylalkyl, aryl, alkylaryl, cycloalkylaryl, arylalkyl or arylcycloalkyl radicals, with the proviso that at least two of R1, R2, R3, and R4 are aryl, arylalkyl or arylcycloalkyl radicals; (a22) an olefinically unsaturated terpene hydrocarbon; and (a23) a dimeric alpha-alkylvinylaromatic.
摘要翻译:本文公开了通过在水性介质(C)中乳化液体组分(B)而在乳化剂(A)存在下制备的粉末涂料悬浮液,得到液体颗粒(D)的水性乳液; 并冷却液体颗粒(D)的乳液; 其中所述乳化剂(A)的羟值为50-250mgKOH / g,并且是通过在水性介质(a1)中共聚含羟基的烯属不饱和单体制备的共聚物; 和(a2)选自(a21)通式为R 1 R 2 C = CR 3 R 4的单体的烯属不饱和单体,其中R 1,R 2,R 3和R 4独立地为氢原子或取代或未取代的烷基,环烷基,烷基环烷基, 环烷基烷基,芳基,烷基芳基,环烷基芳基,芳基烷基或芳基环烷基,条件是R 1,R 2,R 3和R 4中的至少两个是芳基,芳基烷基或芳基环烷基; (a22)烯属不饱和萜烯烃; 和(a23)二聚α-烷基乙烯基芳族化合物。
摘要:
A process and means for producing powder coating materials. A polyaddition resin is prepared in a Taylor reactor at temperatures above the melting temperature of the polyaddition resin. The polyaddition resin melt prepared in a Taylor Reactor is supplied to a homogenizing means and crosslinker is added to the homogenizing means to prepare a components melt, followed by cooling the components melt on a cooling means for solidification to the end product and supplying the end product to a pulverizing means.
摘要:
An oligomeric urethane acrylate composition is disclosed. The composition comprises, on average per molecule, at least two structural units of the general formula I: R{—X—CH2—CH(—CH2—O—(O)—CR1═CH2)[—O—C(O)—NH—]}n (I), where n is a number from 1 to 6, R is a monovalent to hexavalent organic radical, X is oxygen atom or —C(O)—O— radical linked by the carbon atom to the radical R, and R1 is hydrogen atom, halogen atom, nitrile group, substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, substituted or unsubstituted cycloalkyl group having 3 to 6 carbon atoms, or substituted or unsubstituted aryl group having 6 to 10 carbon atoms. Also disclosed are processes for preparing and using the compositions.
摘要:
Powder coating materials prepared by (1) mixing at least two liquid components comprising in each case at least one liquid starting product in a static mixer, to give a molecularly disperse and/or finely dispersed liquid mixture, (2) emulsifying the liquid mixture (1) in an aqueous medium in a dispersing unit, to give an aqueous emulsion of liquid particals, (3) cooling the emulsion (2) so that a suspension of dimensionally stable particles is formed, (4) isolating the dimensionally stable particles from the suspension (3) or alternatively (3) isolating the dimensionally stable particles directly from the emulsion (2); and also processes for preparing them and their use as coating materials, adhesives, and sealing compounds or to prepare such compositions.
摘要:
Liquid compositions and homopolymers or copolymers of olefinically unsaturated compounds, preparable by (co)polymerizing olefinically unsaturated compounds and reactive diluents for thermally curable multisubstance mixtures as reaction medium, and their use to prepare coating compositions, adhesives and sealing compounds.
摘要:
A description is given of polyisocyanates of the formula I in which R and R′ are identical or different and are alkyl groups having 1-4 carbon atoms and n is on average from 1.5 to 5 and also of a process for preparing these polyisocyanates in which a polyamine of the formula II in which R, R′, and n are as defined above, is reacted with phosgene. The new polyisocyanates are suitable for producing crosslinked polyurethanes from reaction mixtures with low solvent content and for producing coating compositions or adhesives. Also described are the coating compositions and adhesives, and their use.
摘要:
The invention relates to polycarbamates of the formula I in which R and R′ are identical or different and are alkyl groups having 1-4 carbon atoms and n is a number from, on average, 2 to 5.