摘要:
A process for producing a 2-alkylidene-4-bromoacetoacetic acid ester of the formula (3): wherein R1 and R2 each independently represent a lower alkyl group having 1-5 carbon atoms, the process is characterized by reacting a 4-bromoacetoacetic acid ester of the formula (1): where R1 has the same meaning as defined above, with an aldehyde of the formula (2): R2CHO (2) wherein R2 has the same meaning as defined above, in an inert organic solvent in the presence of an amine and a carboxylic acid.
摘要:
There are disclosed an industrially favorable process for producing a tetrazole compound of general formula (1): characterized in that a nitrile of general formula (2): R1CN (2) is reacted with hydrazine or a salt thereof in the presence of a catalyst, followed by reaction with a nitrous acid compound of general formula (3): ANO2 (3) or a nitrile of general formula (2) is reacted with hydrogen sulfide, followed by reaction with an alkyl halide of general formula (4): R4J (4) with hydrazine or a salt thereof, and then with a nitrous acid compound of general formula (3); and an intermediate of general formula (5): R1C(═R5)R6 (5) which is useful for the production of the tetrazole compound (in which R1 to R6, A and J in the above formulas are as defined in the specification).
摘要:
An ethylene-aromatic vinyl compound copolymer having an aromatic vinyl compound content of from 1 to less than 55% by molar fraction, prepared in the presence of a transition metal compound containing two unsubstituted or substituted indenyl groups or a transition metal compound containing one unsubstituted or substituted cyclopentadienyl group and one unsubstituted or substituted indenyl group.
摘要:
A recording and reproducing apparatus is disclosed in which video signal and indexing signal are separately recorded in video signal areas and subcode areas, respectively, of diagonal tracks formed on a tape by a rotating head. The apparatus has a tape driver for driving the tape, add/erase command keys for generating add/erase command to add/erase the indexing signal, an indexing signal control for setting and resetting the indexing signal, and a recording device for recording the video signal to the video signal area and, if any, the indexing signal to the subcode area of each track. An editing control is provided for controlling the indexing signal control in response to the add/erase command such that the indexing signal is first recorded as a reset state for a first predetermined amount and then recorded as a set state.
摘要:
A reproducing apparatus reproduces information signals recorded multi-segmentally on oblique tracks on a tape. Track ID information recorded in the tracks is detected and compared with a reference frame to obtain a phase difference. The tape transportation is controlled in response to this phase difference to correct a reproduced phase so that it is made to coincide with a reference frame phase, as well as to perform tracking control using a tracking pilot signal recorded on the oblique track together with the information signal.
摘要:
There is disclosed a process of producing an N-alkylacetamide of the general formula (III): ##STR1## wherein X.sup.1, X.sup.2 and X.sup.3 are the same or different and are independently hydrogen, lower alkyl, lower alkoxy, lower alkenyl, halogen or trifluoromethyl; R.sup.1 and R.sup.2 are the same or different and are independently lower alkyl; and represents a chemical bond of E- or Z-configuration, or a mixture of these configurations, which includes the steps of:(a) reacting an acetonitrile of the general formula (I): ##STR2## wherein X.sup.1, X.sup.2, X.sup.3, R.sup.1 and are each as defined above, with an alkylamine of the general formula (IV):R.sup.2 --NH.sub.2 (IV)wherein R.sup.2 is as defined above, to give an N-alkylacetamidine of the general formula (II): ##STR3## wherein X.sup.1, X.sup.2, X.sup.3, R.sup.1, R.sup.2 and are each as defined above; and(b) reacting the N-alkylacetamidine (II) with a nitrite derivative in the presence of an acid.
摘要:
There is disclosed a process of producing a 2-iminothiazoline derivative of the general formula [II], characterized in that a thiourea derivative of the general formula [I] is treated with an acid. Also disclosed are a process of producing an N-substituted N-arylcyanamide derivative of the general formula [VI], characterized in that an N-arylcyanamide derivative of the general formula [IV] is reacted with an allyl halide derivative of the general formula [V] in an aprotic polar solvent in the presence of an iodide and an alkali metal carbonate; and a process of producing an N-substituted N-arylthiourea derivative of the general formula [VII], characterized in that an N-substituted N-arylcyanamide derivative of the general formula [VI] obtained as described above is further reacted with a chemical species which generates sulfide ion or hydrogensulfide ion.
摘要:
This invention provides an improved system for transporting plastics articles such as containers for foods from one place such as a plastics articles-manufacturing plant to another such as a goods-charging plant and encompasses vehicle means for transporting the articles in large quantities, devices which receive the articles from the vehicle means, convey the articles and discharge them into a pipeline for pneumatic conveyance and a device which is installed at the delivery end of the pipeline, which stores the articles and which is provided with means capable of discharging them therefrom at a predetermined rate.
摘要:
An attaching method for attaching a support plate to a surface of a substrate with an adhesive involves the steps of applying an adhesive to the surface of the substrate, heating and thereafter cooling the substrate, positioning centers of the substrate and the supporting plate to coincide with each other, and forming a layered structure by pushing the supporting plate onto the substrate with the adhesive therebetween in a pressure-reduced atmosphere. In the positioning step, after the supporting late has been placed on the substrate, it is possible to finely adjust the alignment of the supporting plate and a semiconductor wafer when attached because the adhesive is applied to the surface of the substrate, and thereafter the substrate is heated and cooled.
摘要:
An adhesive composition of the present invention includes, as a main component, a polymer produced by copolymerization of a monomer composition including: styrene; a (meth)acrylic acid alkyl ester having a chain structure; a (meth)acrylic acid ester having an aliphatic ring; and a (meth)acrylic acid ester having an aromatic ring, wherein: the styrene is contained in a range of 40 to 69 parts by mass; the (meth)acrylic acid alkyl ester having the chain structure is contained in a range of 20 to 30 parts by mass; the (meth)acrylic acid ester having the aliphatic ring is contained in a range of 10 to 25 parts by mass; and the (meth)acrylic acid ester having the aromatic ring is contained in a range of 1 to 5 parts by mass, where the total amount of the above components is 100 parts by mass. This allows for provision of an adhesive composition having high adhesive strength under high-temperature environment, as well as high heat resistance, high alkali resistance, and easiness in stripping from semiconductor wafers and the like even after high-temperature processing.