摘要:
A melt-blended composition containing at least two kinds of hydrolyzed ethylene-vinyl acetate copolymers having a different ethylene content from each other within the range of 20 to 55% by mole, a degree of hydrolysis in vinyl acetate component of at least 80% by mole and a specific melt tension as defined herein, the hydrolyzed copolymers included in the largest amount and the second largest amount among the hydrolyzed copolymers constituting the composition having a specific relationship with each other in weight ratio and ethylene content and the fusion curve of the composition indicating substantially single peak. The composition has an improved melt-moldability, and provides molded articles having remarkably reduced fish eyes and uniform thickness or excellent dimensional stability.
摘要:
This invention provides a halogen-containing thermoplastic resin composition comprising a halogen-containing thermoplastic resin (A), a melt-moldable vinyl alcohol polymer (B) and a polyesteramide (C), the proportions of (B) and (C) being 0.1 to 100 parts by weight and 0.1 to 10 parts by weight, respectively, based on 100 parts by weight of (A). The component (C) improves the compatibility between the components (A) and (B).
摘要:
This invention provides a halogen-containing thermoplastic resin composition comprising a halogen-containing thermoplastic resin (A) consisting of 100 to 0.1 weight percent of a thermoplastic polyurethane-vinyl chloride graft polymer (a1) with a polyurethane content of 10 to 90 weight percent which is produced by polymerizing vinyl chloride in the presence of a thermoplastic polyurethane and 0 to 99.9 weight percent of another halogen-containing polymer (a2) and a melt-moldable vinyl alcohol polymer (B), the proportion of melt-moldable vinyl alcohol polymer (B) being in the range of 0.1 to 100 parts by weight to 100 parts by weight of halogen-containing thermoplastic resin (A).
摘要:
A thermoplastic resin composition comprising(1) a thermoplastic resin having an ester structure in the main chain and(2) a hydrolyzed ethylene-vinyl acetate copolymer having an ethylene content of 20 to 60% by mole and a degree of hydrolysis in the vinyl acetate component of at least 95% by mole, and having an ash content of not more than 20 ppm and an alkali metal content of not more than 5 ppm. The composition of the present invention can give molded articles having excellent properties, and is suitable for use as wrapping or packaging materials and engineering plastics.
摘要:
An improved saponified ethylene-vinyl acetate copolymer composition comprising(A) 50 to 99.5 weight % of a saponified ethylene-vinyl acetate copolymer,(B) 0.4 to 50 weight % of an ethylene copolymer having a density of 0.90.about.0.94 g/cm.sup.3, and(C) a graft polymer obtainable by grafting an ethylenically unsaturated carboxylic acid or a derivative thereof to a polyolefin resin and reacting the adduct with a polyamide oligomer or polyamide.
摘要:
A halogen-containing thermoplastic resin composition comprising a halogen-containing thermoplastic resin (A), a metallic soap (B) and an ash- and alkali metal-lean ethylene-vinyl acetate copolymer hydrolysate (C) having an ethylene content of 20 to 75 mole percent, a degree of saponification not less than 50 mole percent, an ash content not exceeding 300 ppm and an alkali metal content not exceeding 200 ppm, the proportions of (B) and (C) based on 100 parts of weight by (A) being 0.1 to 5 parts by weight and 0.1 to 5 parts by weight, respectively. The composition may further include, in addition to (A), (B) and (C) mentioned above, at least one compound (D) selected from the group consisting of .beta.-diketone compounds, organic phosphorous esters and aminocarboxylic acid compounds, the proportion of (D) based on 100 parts by weight of (A) being 0.05 to 5 parts by weight, and/or at least one compound (E) selected from the group consisting of phenol derivatives and epoxy compounds, the proportion of (E) based on 100 parts by weight of (A) being 0.01 to 5 parts by weight.
摘要:
A moldable resin composition comprising (1) a saponified ethylene/vinyl acetate copolymer having an ethylene content ranging from 20 to 80 mole % and a saponification degree of not less than 90%, and a polyamide resin containing terminal carboxyl (--COOH) and terminal amide (--CONRR') groups, wherein the number (A) of the terminal carboxyl groups and the number (B) of terminal amide groups satisfies the relationship: ##EQU1## wherein (R) is a hydrocarbyl group of 1 to 22 carbon atoms and R' is a hydrogen atom or a hydrocarbyl group of 1 to 22 carbon atoms.
摘要:
A polyolefin resin composition comprising(A) 50 to 99.5 weight % of a polyolefin resin,(B) 0.4 to 50 weight % of a saponified ethylenevinyl acetate copolymer, and(C) 0.1 to 15 weight % of a graft polymer obtainable by grafting an ethylenically unsaturated carboxylic acid or a derivative thereof to a polyolefin resin and reacting the adduct with a polyamide oligomer or polyamide, which composition satisfies the relation: M.sub.2 /M.sub.1 =not less than 1.5 wherein M.sub.2 and M.sub.1 are the melt flow rates of (B) and (A), respectively, under a load of 2160 g at 210 C. The present invention is predicated on the above finding.
摘要:
A halogen-containing thermoplastic resin composition comprising a halogen-containing thermoplastic resin (A), a metal soap (B), an ethylene-vinyl acetate copolymer hydrolysate (C), and a hydrotalcite type solid solution (D) of the general formula[(M.sub.1.sup.2+).sub.yl (M.sub.2.sup.2+).sub.y2 ].sub.1-x M.sup.3+ .sub.x (OH).sub.2 A.sup.n- .sub.x/n .multidot.mH.sub.2 Owherein M.sub.1.sup.2+ is a metal selected from the group consisting of Mg, Ca, Sr and Ba, M.sub.2.sup.2+ is a metal selected from the group consisting of Zn, Cd, Pb and Sn, M.sup.3+ is a trivalent metal, N.sup.n- is an anion having a valence of n and x, y1, y2 and m are positive numbers in the ranges of 0
摘要:
A process for preparing a vinyl alcohol copolymer, which comprises adding at least one specific olefin derivative containing phenyl group to a solution of vinyl ester copolymer when the predetermined polymerization conversion has been attained, removing an unpolymerized monomer and hydrolyzing the copolymer. The hydrolyzed copolymer easily gives transparent film which has not fish eyes or surface roughness without generation of fumes or bad odors and coloration during molding.