摘要:
To provide a process for stable and continuous production of a polyacetal resin, mainly comprising a copolymer of 1,3-dioxolane and trioxane under the presence of a catalyst, in a high yield on an industrial scale for a long period of time. In the continuous production of a polyacetal resin by mixing 1,3-dioxolane with boron trifluoride and/or a coordination compound of boron trifluoride and then, mixing the obtained mixture with trioxane to conduct bulk polymerization in a polymerization machine, 1,3-dioxolane is brought into contact with boron trifluoride and/or a coordination compound of boron trifluoride while feeding both at the same direction and they are mixed together for 0.1 to 30 seconds under the condition of at least 0.1 m/sec of the linear velocity of the mixture and subsequently mixed with trioxane.
摘要:
A branched or crosslinked polyacetal resin is excellent in blow moldability, has impact resistances such as plane impact resistance, and the smoothness of the inner surfaces of moldings produced therefrom, and is suitable for molding, particularly blow molding. It can be produced by the bulk polymerization of (A) trioxane with (B) a cyclic ether and/or cyclic formal and (C) a polyfunctional glycidyl ether compound in the presence of (D) a cationic polymerization catalyst, a mixture prepared by mixing the cyclic ether and/or cyclic formal (B) with the polyfunctional glycidyl ether compound (C) and the cationic polymerization catalyst (D) is added to trioxane (A) to conduct the polymerization.
摘要:
It is a purpose of the present invention to provide a polyacetal resin composition that contains a glass inorganic filler, improves adhesiveness between the glass inorganic filler and the polyacetal resin, and attains excellent mechanical strength. A polyacetal resin composition comprises 100 parts by weight of a polyacetal resin component (A) and 3-200 parts by weight of a glass in organic filler (B), wherein said polyacetal resin component (A) consists of 99.9-80 parts by weight of a polyacetal resin (A1) having hydroxyl groups at 0-20 mmol/kg in the molecule and 0.1-20 parts by weight of a modified polyacetal resin (A2) having hydroxyl groups at 50-2,000 mmol/kg in the molecule.
摘要:
To provide a polyacetal resin composition which is highly rigid and has excellent surface hardness, sliding characteristics, etc. That is, a polyacetal resin composition, produced by blending 100 parts by weight of a polyacetal resin (A) with 0.01-100 part(s) by weight of a branched polyacetal copolymer (B) which is obtained by copolymerization of 100 parts by weight of trioxane (a), 0.01-10 part(s) by weight of a monofunctional glycidyl compound (b) and 0-20 part(s) by weight of a cyclic ether compound (c) which is copolymerizable with trioxane.
摘要:
A process for producing a transparent film includes forming a melt from a copolyester having structural units represented by the following formulas I and II, respectively: ##STR1## wherein R groups may be the same or different from each other are each selected from the group consisting of--CH.sub.2 CH.sub.2, --CH.sub.2 CH.sub.2 OCH.sub.2 CH.sub.2 --, --CH--CH.sub.2 --, ##STR2## and the molar fraction ratio of the structural units of formula II to the total structural units of formulas I and II is between 0.02 to 0.020, which a melt of the copolyester is formed into a film, rapidly quenched to solidify the copolyester and impart low crystallinity thereto. The solidified film is aged at a temperature of 60 degree centigrade or below, and then heat-treated at a temperature between the glass transition point (Tg) of the copolyester and no greater than 2.degree. C. below the melting point of the copolyester minus 2.
摘要:
To offer a resin material in which various properties such as excellent appearance and rigidity inherent to a polyacetal resin are maintained and a weather (light) resistance is improved. That is, a branched polyacetal resin composition comprising 100 parts by weight of a branched polyacetal copolymer (A) having an oxymethylene group as the main repeating unit and having a branching unit represented by the following formula (I), 0.01 to 5 parts by weight of a weather (light) resistant stabilizer (B) and 0.01 to 5 parts by weight of a hindered amine substance (C): wherein m and n each is an integer of 0 to 5; the sum of m+n is 1 to 5; and R is a monovalent organic group having a molecular weight of 40 to 1000.
摘要翻译:提供一种树脂材料,其中保持聚缩醛树脂固有的优异的外观和刚性等各种性能,并提高耐候性(耐光性)。 即,含有100重量份作为主要重复单元的具有甲醛基的支链聚缩醛共聚物(A)和由下式(I)表示的支化单元的支链聚缩醛树脂组合物,其为0.01〜5重量份 耐光稳定剂(B)和0.01〜5重量份的受阻胺物质(C):其中m和n各自为0至5的整数; m + n的和为1〜5; R为分子量为40〜1000的一价有机基团。
摘要:
A modified polyester resin is the reaction product of:(A) an acid component mainly comprised of terephthalic acid, 2,6-naphthalene dicarboxylic acid or a lower alcohol ester thereof,(B) a diol component mainly comprising an alkylene glycol having 2 to 8 carbon atoms, and(C) an aromatic sulfonic acid compound of the following general formula (1):HO(RO).sub.n --Ar--SO.sub.3 M (1) where Ar represents a benzene or naphthale ring, n represents an integer from 1 to 10, R represents a group selected from among alkylenes having 2 or 3 carbon atoms and when n is 2 or more, R may be the same as or different from one another, and M represents an alkali metal selected from lithium, sodium and potassium. The modified polyester resin also satisfies the following formulas (2) and (3):0.25.ltoreq.x.ltoreq.100 (meq/kg) (2)2.ltoreq.(x/CEG).times.100.ltoreq.150 (%) (3) where x represents the amount of the aromatic sulfonic acid compound represented by the above general formula (1) introduced thereinto and CEG represents the amount of the carboxy end groups, and x and CEG are each expressed in millequivalent per kilogram (meq/kg) of the polymer.
摘要:
A transparent polyester container is produced by melt-molding a copolyester resin containing 75 to 98 molar % of repeating units of an ester of terephthalic acid with 1,4-butanediol with the balance mainly containing repeating units of an ester of terephthalic acid with an alkylene oxide adduct of a bisphenol compound, rapidly cooling the molding to prepare a sheet having a low crystallinity, maturing the sheet at a temperature selected so as to meet a requirement represented by the following formula (1) to prepare a sheet satisfying a requirement represented by the following formula (2) and subjecting the sheet to thermoforming through the use of a cavity mold at a temperature falling within a range represented by the following formula (3):______________________________________ Ta .ltoreq. Tcc (.degree.C.) (1) (.DELTA.Hcc).sub.a .gtoreq. 5 (J/g) (2) Tcc + 2 .ltoreq. Tb .ltoreq. Tm - 2 (.degree.C.) (3) ______________________________________ whereinTa is the maturing temperature (.degree.C.),Tb is the cavity mold temperature (.degree.C.),Tcc is the cold crystallization temperature (.degree.C.),Tm is the melting point (.degree.C.) of the resin, and(.DELTA.Hcc).sub.a is the quantity of heat (J/g) of cold crystallization of the sheet after maturing.
摘要:
To provide a resin material in which various properties such as excellent appearance and rigidity inherent to a polyacetal resin are maintained and to which the antistatic property is given. That is, a branched polyacetal resin composition, comprising 100 parts by weight of a branched polyacetal copolymer (A) having an oxymethylene group as the main repeating unit and having a branching unit represented by the following formula (I), and 0.1 to 30 parts by weight of a compound (B) having a polyalkylene ether unit as the main constituting component and/or 0.01 to 10 parts by weight of an ester (C) of fatty acid with polyhydroxyl alcohol having a hydroxyl group: wherein m and n each is an integer of 0 to 5; the sum of m+n is 1 to 5; and R is a monovalent organic group having a molecular weight of 40 to 1000.
摘要翻译:提供一种树脂材料,其中保持聚缩醛树脂固有的优异外观和刚性等各种性能,并提供抗静电性能。 即,含有作为主要重复单元的具有氧亚甲基的支链聚缩醛共聚物(A)100重量份,具有下述通式(I)所示的分支单元的支链聚缩醛树脂组合物和0.1〜30重量份 的具有聚亚烷基醚单元作为主要成分的化合物(B)和/或0.01至10重量份的具有羟基的多羟基醇的脂肪酸酯(C):其中m和n各自为 0到5的整数; m + n的和为1〜5; R为分子量为40〜1000的一价有机基团。
摘要:
Moldable polyester resin compositions and molded articles therefrom include, based on the total weight of all resin components:(A) between 2 to 98% by weight of a compatibilizing metal sulfonate group-containing aromatic polyester copolymer which is the polycondensation reaction product of (a) an aromatic dicarboxylic acid or its ester-forming derivative, (b) a diol compound or its ester-forming derivative, and (c) an ester-forming compound containing a metal sulfonate group;(B) between 2 to 98% by weight of an additive resin which is one of (B-I) an olefin copolymer which is the copolymerization reaction product between an olefin with at least one of an .alpha.,.beta.-unsaturated carboxylic acid or its derivative and a vinyl alcohol or its ester, and (B-II) a polyamide resin; and, optionally(C) between 0 to 96% by weight of a non-compatibilizing aromatic polyester resin.The ester-forming compound containing a metal sulfonate group is preferably incorporated into the main polymer chain of the compatibilizing aromatic polyester resin in an amount between 0.01 to 15 molar percent.