摘要:
A method for transferring ink (24a, 34a, 44a, 64a, 94a, 104a) on a plate (21, 31, 41, 61, 91 and 101) onto a material to be printed (23, 33, 43, 53, 67, 93, 106) by a printing method. The method involves the steps of: providing the ink at predetermined positions (25, 35, 45, 65) on the plate, the ink being sensitive to a field to increase its viscosity so as to have a solidified state or a semi-solidified state; applying the field to the ink to maintain configuration of the ink provided at the predetermined positions on the plate; and transferring the ink onto the material to be printed while maintaining the ink in the solidified or semi-solidified state.
摘要:
A polyphenylene ether resin composition comprising as the major components:
(a) 100 parts by weight of polyphenylene ether resin, and (b) 1 - 30 parts by weight of a hydrocarbon resin which has a softening point of 140 - 180 o C and a ratio of weight-average molecular weight to number-average molecular weight M w /M n of 2.0 or less, and is prepared by polymerizing a raw material oil of hydrocarbon in which a total content of indene and methylindene is 80% by weight or more by the use of a Friedel-Crafts type catalyst.
摘要:
An aqueous dispersion of a substituted succinic anhydride comprising an aqueous soluble copolymer A, or an aqueous soluble copolymer A 2 or a mixture of these two copolymers, the copolymer A, having 50 to 98.5 per cent by mol of (meth)acrylamide (a), 1 to 49.5 per cent by mol of N,N-dialkylamidealkyl(meth)acrylamide (b), and 0.5 to 20 per cent by mol of (meth)acrylic acid (c) as monomer ingredients, the aqueous soluble copolymer A 2 having 70 per cent by weight or more of a mixture monomer ingredient having 50 to 98.5 per cent by mol of (meth)acrylamide (a), 1 to 49.5 per cent by mol of N,N-dialkylaminoalkyl(meth)acrylamide (b) and 0.5 to 20 per cent by mol of (meth)acrylic acid (c) and other copolymer monomer (d) as monomer ingredients. The dispersion is used as a sizing agent and shows a dilute stability in paper-making steps as well as a sufficient sizing effect in a low content addition range, even in acidic paper making without using a calcium carbonate filler, and in neutral paper making using alum.
摘要:
Resin compositions are disclosed for use as engineering plastic grades. A selected class of cured polybutadienes of specified configuration is crosslinked with a selected class of thermoplastic or thermosetting resins. The resultant composition is highly capable of exhibiting superior heat distortion temperature, great impact strength and adequate dielectric constant.
摘要:
Resin compositions are disclosed for use as engineering plastic grades. A selected class of cured polybutadienes of specified configuration is crosslinked with a selected class of thermoplastic or thermosetting resins. The resultant composition is highly capable of exhibiting superior heat distortion temperature, great impact strength and adequate dielectric constant.
摘要:
A method for preparing a light-colored indene-coumarone resin is here disclosed which comprises the step of polymerizing an aromatic coal fraction raw material having a boiling point of 140 to 240°C in the presence of a Friedel-Crafts type catalyst in a polymerization reactor in which the amount of oxygen is restricted to 15 ml or less with respect to 100 g of the aromatic coal fraction raw material oil at room temperature. As a raw material, a mixture is also used which is composed of the above-mentioned aromatic coal fraction and a phenol in an amount of 3 to 30 parts by weight with respect to 100 parts by weight of the aromatic coal fraction.
摘要:
An aqueous dispersed solution of a substituted succinic anhydride which comprises an aqueous soluble copolymer (A) having 50 percent or more by mol of (meth)acrylamide (a) 1 percent or more by mol of N,N-dialkylamino.alkyl(methy)-acrylamide (b) as monomer ingredients, aqueous soluble copolymer (B) having 50 percent or more by mol of (meth)acrylamide (a), 1 percent or more by mold of N,N-dialkylamino.alkyl(meth)acrylamide (b) and 49 percent or less by mol of other copolymer monomer (c) as monomer ingredients, or both of the aqueous soluble copolymer (A) and the aqueous soluble copolymer (B), and a process for producing an aqueous dispersed solution of a substituted succinic anhydride prepared by dispersing the aqueous soluble copolymer (A) or the aqueous soluble copolymer (B) or a mixture (C) of 99 to 99.9 percent by weight of the substituted succinic anhydride (d) and 10 to 0.1 percent by weight of an oil-in-water type surfactant (e) in aqueous solution containing both the aqueous soluble copolymer (A) and the aqueous soluble copolymer (B). Thus, the aqueous dispersion can provide an excellent sizing effect in case applied as a sizing agent in paper making process but also has preferable dilute dispersibility of aqueous dispersion, does not possibly contaminate wires, rolls and carpets of a paper making machine when applied as a sizing agent in the practical paper making process with properties of capable of continuously operating for a long period of time.