摘要:
A carboxyl group-containing epoxy acrylate is prepared by the reaction of an epoxy resin advanced with an aromatic biphenol compound which is reacted with a polycarboxylic acid anhydride in the presence or absence of a catalyst and a polymerization inhibitor at an elevated temperature. The carboxyl group-containing epoxy acrylate is mixed with a photoinitiator to obtain a photoresist formulation.
摘要:
Epoxy acrylates and carboxyl group-containing epoxy acrylates of formulae III and IV of the claims that are relatively polymolecular and are chemically crosslinkable can be used in photoresist formulations with the additional use of highly polymerized polymer binders. Such resist formulations are used in particular in the field of printed circuit boards and printing plates, are applicable from aqueous medium, are almost tack-free and have very good edge coverage, especially on conductors.
摘要:
A retention and triggering mechanism with a shape memory actuator which ensures safe triggering and is of simple design and requires little energy. An end (7, 8) of a stressed wire is held by a free end of a wire made of shape memory material (9, 10) which contracts along its length when heated, thus withdrawing its free end from an opening (27, 28) formed in the end (7, 8) of the stressed wire thereby releasing the stressed wire.
摘要:
A coaxial valve includes an actuating drive, a valve housing (11), a valve sleeve (12) that is longitudinally slidable in the valve housing (11) between open and closed positions, and a closing body (13) arranged coaxially at one end of the valve sleeve (12). In the closed position, the valve sleeve seals against the closing body. In the open position, the valve sleeve is spaced from the closing body, to open a valve opening cross-section (V). The actuating drive includes an electric servomotor (21) with a linear actuator (22), and a transmission mechanism (30) for transmitting the linear movement of the actuator to the valve sleeve. The transmission mechanism includes a rocker lever with a first end articulately connected to the linear actuator, a second end articulately connected to the valve housing, and a middle section articulately connected to the valve sleeve.
摘要:
Reaction products of a microgel that contains carboxylic acid groups with a nitrogen-containing base have a high latency and high stability towards mechanical influences and are suitable as hardeners for one-component epoxy resin systems.
摘要:
The present invention relates to a curable mixture which is useful in the formation of castings and which contains (a) an epoxy resin and (b) a mixture of oligomeric cyanoguanidines obtained by the reaction between a monoisocyanate and a diisocyanate to give a carbodiimide which is subsequently reacted with cyanamide.
摘要:
Positive photoresist compositions comprising, in an organic solvent, at leasta) one alkali-soluble resin,b) one photosensitive quinone diazide,c) one aromatic hydroxy compound of formula I ##STR1## wherein each R is --H, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, --OCH.sub.2 C.sub.6 H.sub.5, --OC.sub.6 H.sub.5 or --COOC.sub.1 -C.sub.4 alkyl, and R.sub.1 and R.sub.2 are each independently of the other H, C.sub.1 -C.sub.4 alkyl, --C.sub.6 H.sub.5 or a cycloaliphatic 5- or 6-membered ring, a is an integer from 0 to 4, and m and n are each independently of the other 0, 1 or 2, which compound enhances the photosensitivity and/or the rate of development, and optionallyd) additional customary modifiers,are eminently suitable for making relief structures.
摘要翻译:正性光致抗蚀剂组合物,其在有机溶剂中包含至少一种碱溶性树脂,b)一种光敏醌二叠氮化物,c)一种式I的芳族羟基化合物(*化学结构*)(I),其中每个R是 - H,C 1 -C 4烷基,C 1 -C 4烷氧基,-OCH 2 C 6 H 5,-OC 6 H 5或-COOC 1 -C 4烷基,R 1和R 2各自独立地为H,C 1 -C 4烷基,-C 6 H 5或脂环族五元或六元环, a是0至4的整数,m和n各自独立地为0,1或2,该化合物增强光敏性和/或显影速率,以及任选地d)另外的常规改性剂,特别适用于 做救济结构。
摘要:
An improved process for the preparation of glycidyl ethers of formula I ##STR1## wherein Q is an aliphatic, cycloaliphatic or araliphatic radical of a valency m, R is --H or --CH.sub.3, and m is an integer from 1 to 10,by reacting an alcohol of formula Q--(OH).sub.m with m mol of an epihalohydrin of formula II ##STR2## in the presence of a catalyst to the corresponding halohydrin ether, and dehydrohalogenating said halohydrin ether with an alkali metal hydroxide to give a compound of formula I, wherein Q, m and R are as defined above and Hal is halogen,which process comprises using as catalysta) tin difluoride orb) a divalent tin halide in conjunction with a co-catalyst.
摘要:
Orthocarbonates of the formula I ##STR1## in which R is C.sub.1 -C.sub.4 alkyl, x is zero, 1 or 2, and A is a trivalent radical derived from an aliphatic triol by omitting the hydroxyl groups, the hydroxyl groups of the triol being bonded to different carbon atoms, are suitable as cocomponents in the curing of epoxy resins in that they limit the reduction in volume occurring during curing of epoxy resins. In addition, the cured resins are distinguished by increased flexural strength and impact strength.
摘要:
Novel epoxidised phenol ethers of formula I ##STR1## are described wherein R.sup.1 denotes C.sub.1 -C.sub.20 alkyl, C.sub.5 -C.sub.9 cycloalkyl or C.sub.7 -C.sub.14 aralkyl, R.sup.2 has one of the meanings of R.sup.1 or is, in addition hydrogen or a radical or formula II ##STR2## R.sup.3 denotes C.sub.1 -C.sub.6 alkyl or halogen, R.sup.4 and R.sup.5 denotes hydrogen or C.sub.1 -C.sub.6 alkyl, R.sup.6 denotes hydrogen or methyl, m is 0, 1 or 2 and n is an integer from 0 to 30, with the proviso that at least two radicals, R.sup.2, must be epoxide groups of formula II. The compounds are especially suitable for encasing electronic components.