Abstract:
PURPOSE:To provide a plastic container produced from a polyester resin composition comprising a specific modified polyester resin and a specified resin dispersed therein, and excellent in environmental characteristics, impact resistance, rigidity, dimensional stability, moldability, luster, etc. CONSTITUTION:This container comprises a polyester resin composition comprising (A) 100 pts.wt. of a modified polyethylene terephthalate resin in which 3-100mol.% among the total amount of 200mol.% comprising 100mol% of the dicarboxylic acid component and 100mol.% of the diol component is modified and which has a glass transition tempeqature of >=50 deg.C and an intrinsic viscosity [eta]of >=0.5dl/g in a phenol/tetrachloroethane (weight ratio : 6/4) mixture solvent at 25 deg.C, and (B) 1-30 pts.wt. of a resin (preferably an acrylic rubber) having a Tg of
Abstract:
PURPOSE:To provide a resin compsn. excellent in oil resistance and flexibility and suitable as a material of a container which is neither deformed nor swollen even by the contents contg. an oil in a high proportion and excellent in squeezability, adhesion by pinch-off, and heat-sealing properties, and to provide the container. CONSTITUTION:At least one amorphous or lowly crystalline resin selected from the group consisting of polyester and polyamide resins each having a glass transition point of about 50 deg.C or higher is blended with at least one resin selected from the group consisting of polyester and polyamide resins each having a glass transition point of about 40 deg.C or lower, thereby giving the objective resin compsn.
Abstract:
PURPOSE:To improve the barrier performance against gas such as oxygen, carbon dioxide, or the like, and water vapor by forming a multilayer vessel comprising at least two layers of thermoplastic polyester having a specified composition and polyolefin. CONSTITUTION:A perform is molded by injection molding, which comprises at least two layers of a thermoplastic layer containing an ethylene naphthalate unit of 80mol% as a repeated unit and a polyolefinic layer. It is then subjected to draw/blow molding in at least single axis direction at a temperature of 110-170 deg.C, to thereby form a multilayer vessel. The used polyolefin preferably contains a propylene unit of 70mol% as a repeated unit, and also may be a copolymer of olefin such as 1-octane of 30mol%. In order to enhance the transparency, and the barrier performance against gas such as oxygen, carbon dioxide or the like in the vessel, it is preferable to effect the draw-molding in at least a single axis direction.
Abstract:
PURPOSE: To obtain the titled resin useful as, e.g., a support for immobilizing enzymes or a hydroscopic material stably in good efficiency, by polymerizing an aqueous solution of a water-soluble ethylenically unsaturated monomer suspended by dispersion in a hydrophobic solvent inert to polymerization in the presence of a specified dispersant. CONSTITUTION: A dispersant mixture (B) is obtained by adding a polyoxyalkyl ene monoether-type hydrophobic group-containing oil-soluble noionic surfactant to a sorbitan fatty acid ester of a HLB of 3ν9 so that the resultant HLB may be adjusted to 6W10. 1pt.wt. 15W80wt% aqueous solution of a water-soluble ethylenically unsaturated monomer (A) [e.g., (meth)acrylic acid] is suspended by dispersing in 1W4pts.wt. hydrophobic solvent inert to polymerization such as an aliphatic or alicyclic hydrocarbon of a b.p. of30W200°C in the presence of 0.05W10wt%, based on component A, component B. A water-soluble radical polymerization initiator (e.g., potassium persulfate) is added to the dispersion and dissolved and this dispersion is subjected to W/O suspension polymerization. COPYRIGHT: (C)1986,JPO&Japio
Abstract:
PROBLEM TO BE SOLVED: To obtain the subject composition causing no degradation of the highly water-absorbing resin even in e.g. an aqueous solution containing radical- generating matter such as L-ascorbic acid and transition metal ion(s) such as iron ion despite being high in water absorption by including a highly water- absorbing resin, a specific metal compound such as of titanium, and a chelate compound. SOLUTION: This composition is obtained by including (A) a highly water- absorbing resin, (B) a metal compound containing Ti and/or Zr, pref. a polyvalent metal salt composed of a hydroxy acid (salt) and Ti and/or Zr (mixed with alkoxide(s) of Ti and/or Zr), and (C) a chelate compound (pref. a water-soluble inorganic phosphorus-based compound, aminocarboxylic acid-based compound, organophosphorus-based compound, surfactant-based compound, or the like); alternatively, by including the component A and (D) a compound with the component C coordinated on the above metal(s).
Abstract:
PURPOSE:To decrease the amount of resin in a polyester container while increasing the strength of the container by making the container by stretched blow molding with a specified compound added to polyester resin. CONSTITUTION:A resin composition obtained by adding a compound shown in a formula I or a compound shown in a formula III in 0.1-10 pts.wt. to polyester resin in 100 pts.wt. is molded by stretched blow molding. In the formula I, R stands for alkyl group or alkoxyl group, and R'stands for hydrocarbon group, m and n are the integers with which m+n becomes not less than 0 and not more than 3, p and r are the integers with which p+r becomes 1 or 2, q is 0 or 1 and X is either one of those which are in the formula II. R1 and R2 in the formula II stand respectively for H or alkyl group with carbons in 4 or below. B1 and B2 in the formula III stand for alkyl group or alkoxyl group respectively with carbons in numbers from not less than 3 to not more than 18, A stands for dialiphatic hydrocarbon group, dialicyclic hydrocarbon group or diaromatic hydrocarbon group. When making stretched blow molding, magnification of planate stretching is four times or more.
Abstract:
PURPOSE:To obtain the subject resin, containing a specific amount of a specified diol, excellent in transparency, heat resistance and mechanical strength and suitable as hollow containers, etc. CONSTITUTION:The objective resin in which the principal component of a dicarboxylic acid component constituting the polyester is terephthalic acid and 3-80mol% of a diol component such as ethylene glycol is a diol [e.g. ethylene oxide adduct of bis(4-hydroxyphenyl)methane] expressed by formula I [R is H or methyl; X is direct bond, C2H4, formula II (Y and Z are H or 1-3C alkyl), O or SO2; (n) and (m) are 1-5].
Abstract:
PURPOSE:To obtain a multilayer plastic container having transparency and excellent in barrier properties to gas, water vapor and ultraviolet rays by forming the container consisting of two layers of a thermoplastic polyester layer which has ethylene terephthalate as a main repeating unit, and a thermoplastic polyester layer containing ethylene naphthalate. CONSTITUTION:In this process for producing a multilayer plastic container, a preform (preliminarily molded article) consisting of at least two layers of a thermoplastic polyester layer (layer A) which has the main repeating unit of 90mol% or more ethylene terephthalate as a repeating unit, and a thermoplastic polyester layer (layer B) which has 5-90mol% ethylene naphthalate as a repeating terminal, is molded by injection molding and then blow-molded to be oriented at least in an uniaxial direction in a temperature range of 80-120 deg.C. The multilayer plastic container thus produced is uniform in its thickness, has transparency and is further excellent in barrier properties to gas, such as an oxygen gas and a carbonic acid gas, or to water vapor, and also in barrier properties to ultraviolet rays. In particular, the container can be suitably utilized as a foodstuff packaging container.
Abstract:
PURPOSE:To provide a hydrolyzable paper capable of being flowed in a toilet after used by employing a water-soluble anionic adhesive and a specific water- soluble cationic polymer as a yield-improving agent. CONSTITUTION:A pulp slurry is mixed with a water-soluble cationic polymer having repeating units of the formula [R1 is H or methyl; R2 and R3 are 1-3C alkyl, hydroxyl-substituted alkyl or benzyl; Z is -C(O)O- or -C(O)NH-; Y is 2-4C alkylene or hydroxyl-substituted alkylene; X is anion; n is >=2] and a viscosity (20 deg.C) of 9-200cP, preferably 9-200cP, in a state of 20% aqueous solution preferably in an amount of 1-6% (based on the weight of the pulp), further mixed with a water-soluble anionic adhesive (e.g. CMC or carrageenan) and subsequently subjected to a paper-making process to provide the objective hydrolyzable paper.
Abstract:
PURPOSE:The titled dispersant which can consistently given small polymer granules free of fine polymer particles, prepared by reacting a polymer of an N-vinyl cyclic amide with an alpha-olefin or an alkyl vinyl ether in the presence of a peroxide compound. CONSTITUTION:A polymer of an N-vinyl cyclic amide of formula II (wherein R' and R'' are each H, CH3 or C2H5 and n is 1-3), e.g., N-vinylpyrrolidone, is reacted with a 6C or higher alpha-olefin or an alkyl vinyl ether, wherein the alkyl group is 6C or higher, at 80-200 deg.C for 10-40hr in the presence of a peroxide compound to obtain the titled dispersant comprising a polymer having repeating units of formula II, wherein (R1, R2) is selected from among the combinations of (H, H), (H, CH3), (H, C2H5), (CH3, C2H5), (H, 6C or higher linear or branched alkyl) and (H, 6C or higher alkoxyethyl) and R3-4 are each a 6C or higher linear or branched alkyl or a 6C or higher alkoxyethyl. A monomer is subjected to reversed phase suspension polymerization in the presence of 0.01-10wt% said dispersant.