203 results about "Vinylcyanide" patented technology

The present invention provides an aromatic polycarbonate resin composition having excellent surface impact strength and flame retardancy which is suitable for production of thin-wall molded products, as well as a molded product produced from the composition.The aromatic polycarbonate resin composition comprises.100 parts by weight of a mixture comprising 60 to 90% by weight of an aromatic polycarbonate resin (a), 10 to 40% by weight of a rubber polymer / aromatic vinyl / cyanided vinyl-based copolymer (b-1) and 0 to 35% by weight of an aromatic vinyl / cyanided vinyl-based copolymer (b-2);10 to 40 parts by weight of (c) a phosphorus-based flame retardant;0 to 5 parts by weight of (d) a fluorinated polyolefin; and0 to 50 parts by weight of an inorganic filler (e),a content of the rubber polymer component being 31 to 50% by weight on the basis of a total amount of the components (b-1) and (b-2), and which aromatic polycarbonate resin composition has such a property that an injection-molded product obtained from the aromatic polycarbonate resin composition satisfies the following relational formula (1):Cpf / Cpc<2  (1)wherein Cpf is a notched Charpy impact strength in a direction parallel with a flow direction of the resin composition; and Cpc is a notched Charpy impact strength in a direction perpendicular to a flow direction of the resin composition as measured according to JIS K7111.

The present invention relates to a process for preparing thermoplastic resin for extrusion sheets, and particularly to a process for preparing acrylonitrile-butadiene-styrene (ABS) thermoplastic transparent resin for extrusion sheets having superior impact resistance, chemical resistance, processability, whitening resistance, high temperature elongation, etc. and very superior transparency, by controlling a mixing ratio of a methacrylate alkylester compound or acrylate alkylester compound, an aromatic vinyl compound, and a vinylcyanide compound grafted on conjugated diene rubber latex of which an average particle diameter and gel contents (degree of crosslinking) are optimized to control a refractive index of the monomer mixture to be similar to that of the rubber latex, and optimizing the molecular weight.

The reinforced thermoplastic resin composition of the present invention includes: 50 to 90% by weight of a polycarbonate resin (A); 10 to 50% by weight of a graft copolymer mixture (B) (provided that a total amount of the component (A) and the component (B) accounts for 100% by weight) which is obtained by graft-polymerizing an aromatic alkenyl compound monomer unit (a) and a vinyl cyanide compound monomer unit (b) onto a rubber polymer (B1); and 6 to 22 parts by weight of an inorganic filler (D) which has been surface-treated with a water-soluble polyamide, relative to the total of 100 parts by weight of the polycarbonate resin (A) and the graft copolymer mixture (B). There is provided a reinforced thermoplastic resin composition exhibiting excellent moldability, generates a minimal amount of gas during molding, and also being capable of improving the rigidity of the resulting molded article and the impact resistance when dropping the product.

The present invention relates to a thermoplastic resin composition and a preparation method of the same, and more precisely a thermoplastic resin having excellent impact strength, surface gloss, and beautiful color, as well as a high level of hardness and scratch resistance, which comprises a) a primary graft copolymer prepared by polymerization of conjugated diene rubber latex with (metha)acrylic acid alkyl ester compound, aromatic vinyl compound and vinyl cyan compound; and b) a secondary copolymer prepared by polymerization of (metha)acrylic acid alkyl ester compound with aromatic vinyl compound and vinyl cyan compound.

The present invention relates to a method for preparing a rubber-reinforced thermoplastic resin, the prepared rubber-reinforced thermoplastic resin and a rubber-reinforced thermoplastic resin composition thereof, wherein the rubber-reinforced thermoplastic resin has excellent heat-sealing properties and thermal stability maintaining good mechanical properties. More specifically, the present invention relates to a method for preparing a rubber-reinforced thermoplastic resin, the prepared rubber-reinforced thermoplastic resin and a rubber-reinforced thermoplastic resin composition thereof, characterized in that the use includes, based on 100 parts by weight of the total monomers used to prepare the graft copolymer , 10 to 30 parts by weight of rubber latex with an average particle diameter of 0.08 to 0.16 μm and a gel content of 65 to 95 percent by weight, and 15 to 45 parts by weight of a rubber latex with an average particle diameter of 0.26 to 0.34 μm and a gel content of 55 to 85 percent by weight The mixture of rubber latex, keeping the ratio of vinyl cyanide including acrylonitrile to aromatic vinyl compound including styrene is 16 / 84~24 / 76 as the monomer composition grafted on the rubber latex, and adjusting the grafting The copolymer, that is, the rubber-reinforced thermoplastic resin, has a graft ratio of 25-65.

The present invention relates to a transparent resin composition which has excellent chemical resistance and transparency and is usable for medical purposes and food containers, a method for preparing the same, and a molded product manufactured therefrom and, specifically, to a transparent thermoplastic resin composition having excellent chemical resistance and transparency, a method for preparing the same, and a molded product manufactured therefrom, wherein the resin composition contains: (A) a graft copolymer obtained by graft-copolymerizing, onto a) conjugated diene rubber latex, b) a methacrylic acid alkyl ester compound or an acrylic acid alkyl ester compound, c) an aromatic vinyl compound, and d) a vinyl cyan compound; (B) a copolymer resin obtained by copolymerizing i) a methacrylic acid alkyl ester compound or an acrylic acid alkyl ester compound, ii) an aromatic vinyl compound, and iii) a vinyl cyan compound; and (C) a polyether-amide bloc copolymer.

The resin composition according to the present invention comprises(A)a graft polymer prepared by grafting in emulsion polymerization 100 parts by weight of monomer mixture comprising 20-30% by weight of vinyl cyanide compound and 70-80% by weight of vinyl aromatic compound to 20-60 parts by weight of diene rubber,(B)a graft polymer prepared by grafting in emulsion polymerization 100 parts by weight of monomer mixture comprising 20-30%by weight of vinyl cyanide compound and 70-80% by weight of vinyl aromatic compound to 20-60 parts by weight of acrylic rubber,(C)a linear copolymer prepared by polymerizing 40-50% by weight of vinyl cyanide compound and 50-60% by weight of vinyl aromatic compound, and (D) a branched copolymer prepared by 30-35% by weight of vinyl cyanide compound and 65-70% by weight of vinyl aromatic compound.

The present invention relates to an acrylonitrile (ASA) type thermoplastic resin composition with excellent weatherability and appearance properties, and more particularly, to an acrylate-styrene-acrylonitrile type thermoplastic resin composition comprising a) an acrylate-styrene-acrylonitrile graft copolymer; b) a butadienc-acrylonitrile methylmethacrylate graft copolymer; c) a copolymer of aromatic vinyl compound and vinylcyanide compound; and d) an alkyl acrylate copolymer, which has remarkably improved appearance properties such as scratch resistance, color (color stability) and gloss as well as excellent basic properties and weatherability.

The invention provides a flame retardant aromatic series panlite polycarbonate resin composite, wherein, as per parts by weight, the composite contains 50-90 parts by weight of aromatic series panlite polycarbonate resin (component A) and 1-50 parts by weight of thermoplastic graft copolymer (component B), which is formed by grafting vinylcyanide compounds and aromatic series vinyl-compounds on dienes rubber constituent, and does not present an absorption peak derived from fatty amide between 3200cm<-1> and 3400cm<-1> in the measurement of infrared absorption spectrum, and the rubber constituent content of which is 5-80 percent by weight, and contains 1-30 parts by weight of organophosphorous flame retardant (component C) and 0.05-2 parts by weight of fluorine-containing drip-proof agent (component D) as well, and all the contents of the composite amount to 100 parts by weight. The invention also relates to a flame retardance aromatic series panlite polycarbonate resin composite which contains aromatic series panlite polycarbonate resin, ABS resin, organophosphorous flame retardant and fluorine-containing drip-proof agent and the flame retardance of which is further improved without reducing flowability and mechanical features.

The present invention relates to acrylonitrile-butadiene-styrene copolymer transparent resin having superior chemical resistance and transparency and preparation thereof, and particularly to acrylonitrile-butadiene-styrene copolymer transparent resin having superior chemical resistance and transparency by graft-copolymerzing on a) conjugated diene rubber latex, b) methacrylate alkylester or acrylate alkylester compound, c) aromatic vinyl compound and d) vinyl cyanide compound, and preparation thereof. In addition, according to the present invention, chemical resistance and ESCR can be further improved by further adding e) polyester-amide copolymer to the acrylonitrile-butadiene-styrene copolymer transparent resin.

Amorphous polyolefin resin compositions having an impact resistance remarkably improved without impairing the transparency by an impact modifier which can be prepared from easily available raw materials by a general polymerization method, the compositions containing as the impact modifier a core-shell elastomer obtained by graft polymerization of a monomer mixture of an alkyl (meth)acrylate with an alkyl group having 3 to 8 carbon atoms, an alkyl (meth)acrylate with an alkyl group having 2 or less carbon atom or a vinyl cyanide compound, and an aromatic vinyl monomer in a specific ratio in the presence of a conjugated diene copolymer rubber.

The present invention relates to a method for producing an ABS-based graft copolymer and a method for producing a thermoplastic resin composition comprising same. More specifically, the present invention relates to a method for producing an ABS-based graft copolymer and a method for producing a thermoplastic resin composition comprising same, characterized in that a predetermined amount of a vinylaromatic compound and a vinyl cyan compound are added and partially grafted before enlarging a small-diameter rubber latex, and then a polymer coagulant is added in a specific content range to enlarge the rubber latex. According to the present invention, the stability of the latex can provide an ABS-based graft copolymer and has an advantage of improving impact resistance.

A polyamide resin / rubber-reinforced styrene-based resin composition, particularly, a polyamide resin / ABS resin composition, excellent in the balance between impact strength and fluidity as well as in the heat resistance, chemical resistance and paintability, as well as a shaped article thereof, are provided. The resin composition comprises 100 parts by weight of a thermoplastic resin comprising (A) from 79.5 to 20 parts by weight of a polyamide resin, (B) from 20 to 79.5 parts by weight of a polymer obtained by grafting an aromatic vinyl-based monomer and a vinyl cyanide-based monomer to a specific rubber-like polymer, (C) from 0.5 to 60 parts by weight of an unsaturated carboxylic acid-modified copolymer obtained by copolymerizing an unsaturated carboxylic acid, an aromatic vinyl-based monomer and a vinyl cyanide-based monomer, and (D) from 0 to 50 parts by weight of a copolymer obtained by copolymerizing an aromatic vinyl-based monomer and a vinyl cyanide-based monomer (with the proviso that the total of (A), (B), (C) and (D) is 100 parts by weight), and if desired, further comprises (E) from 0.05 to 150 parts by weight of an inorganic filler.

The thermoplastic ABS resin composition according to the present invention comprises (a) 2 to 25 parts by weight of a graft copolymer particle containing rubbers having a volume average particle diameter range from 0.05 μm to less than 0.18 μm; (b) 2 to 25 parts by weight of a graft copolymer particle containing rubbers having a volume average particle diameter range from 0.18 μm to less than 0.4 μm; (c) 2 to 18 parts by weight of a graft copolymer particle containing rubbers having a volume average particle diameter range from 0.4 μm to less than 4 μm; (d) 10 to 70 parts by weight of a branched vinyl cyanide-vinyl aromatic copolymer; and (e) 1 to 60 parts by weight of a long-chain linear vinyl cyanide-vinyl aromatic copolymer.

The present invention relates to ABS thermoplastic resin and preparation thereof, and particularly to a process for preparing an ABS graft copolymer comprising the step of introducing to a) 40 to 80 weight parts of rubber latex comprising i) 10 to 50 weight parts of large diameter polybutadiene rubber latex having a particle diameter of 2500 to 3500 Å, gel contents of 60 to 80%, and a swelling index to 12 to 30, and ii) 50 to 90 weight parts of large diameter rubber latex having a particle diameter of 2500 to 3500 Å, gel contents of 81 to 97%, and a swelling index of 18 to 40, b) 20 to 60 weight parts of a monomer mixture of two or more kinds selected from a group consisting of aromatic vinyl compounds and vinyl cyanide compounds to prepare a graft copolymer, wherein 5 to 30 wt % of the monomer mixture is introduced as a batch and simultaneously 70 to 95 wt % of the monomer mixture is started to be continuously introduced in an emulsified state, and a thermoplastic resin composition using the same. According to the process of the present invention, control of polymerization heat is easy even at high solid contents, and polymerization cohesion contents can be minimized and thus ABS thermoplastic resin having superior impact resistance, gloss, and coloring property can be provided.

A thermoplastic resin composition, comprising:an aromatic polycarbonate (A);a copolymer mixture (B) comprising a copolymer (b1) of a vinyl cyanide-based monomer and one or more kinds of monomers copolymerizable with said vinyl cyanide-based monomer, and a graft copolymer (b2) of a vinyl cyanide-based monomer, one or more kinds of monomers copolymerizable with said vinyl cyanide-based monomer and a rubbery polymer; andat least one kind of metal atom selected from the group consisting of Mg, Al and Ca,wherein the copolymer mixture (B) comprises an acetone-soluble component,wherein said acetone-soluble component has at least two peak tops, being peak top 1 and peak top 2, within the range of 15 to 50% of vinyl cyanide component content rate, when measuring the vinyl cyanide component content rate by high performance liquid chromatography,wherein the peak top 1 is present in the range of 15% or more to 30% or less of vinyl cyanide component content rate,wherein the peak top 2 is present in the range of from more than 30% to 50% or less of vinyl cyanide component content rate, andwherein the total content of the metal atoms is 10 to 1000 ppm, based on 100 parts by mass of total amount of the aromatic polycarbonate (A) and the copolymer mixture (B).

Provided are a thermoplastic resin composition having high environmental stress crack resistance (ESCR) as well as excellent impact resistance and transparency and a thermoplastic resin molded article prepared therefrom. The thermoplastic resin composition includes a graft copolymer (A), in which a (meth)acrylic acid ester, a vinyl cyan-based compound, and an aromatic vinyl compound are graft polymerized with a conjugated diene-based rubber latex; and a copolymer (B) of a (meth)acrylic acid ester-aromatic vinyl compound-vinyl cyan-based compound in a weight ratio of 35:65 to 70:30. A difference in refractive indices of the graft copolymer (A) and the copolymer (B) of the (meth)acrylic acid ester-aromatic vinyl compound-vinyl cyan-based compound is less than 0.003 when irradiated with light having a wavelength of 450 nm to 680 nm, and a melt index is 4.0 g / 10 min or less when the melt index is measured in accordance with ASTM D1238.