摘要:
The invention provides a sizing agent with good stability, particularly which is rapid in getting started in the neutral zone and a method of producing the same.A sizing agent for papermaking in neutral zone is characterized by a main component of said sizing agent being selected from the group consisting of a diester of rosin-based substances having a dicarboxylic acid or acid anhydride group expressed by the following formula (I), ##STR1## (in which R.sub.1 represents a rosin acid residue or maleopimaric acid, R.sub.2 represents a dihydric alcohol residue and R.sub.3 represents a maleopimaric acid residue); and 2) a polyester reaction product expressed by the following formula (I'), ##STR2## (in which R'.sub.1 and R'.sub.5 represent a rosin acid residue or an .alpha.,.beta.-unsaturated polybasic carboxylic acid added rosin residue, at least one of them represents .alpha.,.beta.-unsaturated polybasic carboxylic acid added rosin residue, R'.sub.2 and R'.sub.4 represent polyhydric alcohol residues, R'.sub.3 represents a polybasic carboxylic acid residue being at least tribasic, x and z are integers of 1 to 3, y is 0, 1 or 2 and m and n are 1 or 2); and 3) a mixture comprising a rosin, a rosin modified by .alpha.,.beta.-unsaturated carboxylic acid and/or or an anhydride thereof and a polyhydric alcohol ester of rosin.
摘要:
A hydrogenated diene copolymer resin composition comprising (A) 5-70% by weight of a hydrogenated diene copolymer which is a hydrogenation product of a random copolymer of at least one conjugated diene and 3-50% by weight of an alkenyl aromatic compound having a number average molecular weight of 5,000-1,000,000 and a molecular weight distribution (Mw/Mn) of 10 or less, the vinyl content in the diene portion of the random copolymer being 10-90%, at least 70% of the olefinic unsaturation of the random copolymer being hydrogenated, and (B) 95-30% by weight of at least one resin selected from the group consisting of a polypropylene resin, a polyphenylene ether resin and an alkenyl aromatic compound polymer resin. The hydrogenated diene copolymer (A) can be used in combination with (B) a polyphenylene ether resin and (C) at least one member selected from the group consisting of a polyamide and a thermoplastic polyester in such a proportion that the amount of (A) is 1-50 parts by weight, the amount of (B) is 10-89 parts by weight and the amount of (C) is 10-89 parts by weight. The above composition has improved impact resistance and improved gloss and appearance of molded article.
摘要:
Electronic equipment having a document creating function has a key input unit for inputting a document and tab and cursor position data, a memory unit for storing input characters, storage sections for storing input tab and cursor position data, a display unit for displaying the characters being input and the overall layout in a reduced scale, a printer, and a control unit for controlling the overall equipment. The overall layout of the document being created can easily be confirmed.
摘要:
A device for separating air bubbles from fluids, e. g. feed water, to provide smoother flow thereof, and to protect the piping against corrosion. The device comprises a large hollow cylinder intercalated in the piping and an air-cushion member at the top of the cylinder. An air exhaust pipe is provided in the member to separate the air bubbles.