Abstract:
PURPOSE: A thermoplastic resin composition and its preparation method are provided, to improve the impact resistance, the transparency and the moisture resistance. CONSTITUTION: The method comprises the steps of inputting 40-60 parts by weight of a monomer mixture comprising an acrylonitrile monomer, a styrene-based monomer and an alkyl methacrylate and 0.1-0.5 parts by weight of a hydroperoxide-based oil-soluble initiator to a reactor in the presence of 40-60 parts by weight of a rubbery polymer latex with an average particle diameter of 0.2-0.5 micrometers, adding an emulsifier and an auxiliary initiator and graft polymerizing the monomers; inputting 0.3-0.8 parts by weight of a water-soluble initiator to the reactor when the polymerization conversion rate reaches 90 %, inputting the monomer mixture continuously or several times for 1-3 hours and graft polymerizing the monomers; and coagulating the graft polymerized latex at a coagulation bath containing a metal-based electrolyte coagulant and a strong acid coagulant. The monomer mixture comprises 30-80 wt% of an alkyl methacrylate, 10-40 wt% of an aromatic vinyl compound and 1-20 wt% of an unsaturated nitrile compound, and 10-30 wt% of the monomer mixture is inputted at the first step and the rest (70-90 wt%) is at the second step.
Abstract:
PURPOSE: A thermoplastic resin composition having excellent impact resistance under high humidity, and improved transparency, natural colors and moisture resistance is provided. CONSTITUTION: The thermoplastic resin composition is produced by the process comprising the steps of: (a) introducing 40 to 60 wt% of a monomer mixture(B) consisting of an acrylonitrile monomer, styrene monomer and alkyl methacrylate in the presence of 60 to 40 wt%(based on solid contents) of an elastomeric polymer latex(A) having an average particle diameter of 0.2 to 0.5 micrometers, together with ion exchanged water, 0.5 to 1.0 parts by weight of an emulsifier, 0.1 to 1.0 parts by weight of a molecular weight modifier and 0.05 to 0.5 parts by weight of an oil-soluble peroxide initiator into a reactor, raising the temperature to 50 to 80 deg.C and adding a mixture of an initiation catalyst, a reducing agent and a complexing agent to perform a graft polymerization; and (b) introducing 0.3 to 1.0 parts by weight of a water soluble polymerization initiator when the conversion in the preceding step is more than 90%, and further introducing the monomer mixture(B) for 1 to 5 hours divisionally at several times or continuously to perform a graft polymerization.
Abstract:
A compact disk using MABS(methylmethacrylate-acrylonitrile-butadiene-styrene) copolymer resin is provided to increase fluidity, rigidity, and elongation of the compact disk, and data storage as well as to reduce manufacturing costs of the disk. A compact disk is made out of MABS(methylmethacrylate-acrylonitrile-butadiene-styrene) copolymer resin. Rubber of the MABS copolymer resin is selected from a group consisting of polybutadiene, butadiene-styrene copolymer, polyisoprene, butadiene-acrylonitrile copolymer, isobutylene-isoprene copolymer, ethylene-propylene rubber, acrylic rubber, urethane rubber, and silicon rubber, wherein the content of rubber in the MABS copolymer resin is 12 to 18 weight%.
Abstract:
A resin composition having good scratch resistance is provided to ensure well-balanced physical properties such as a coloring property, weather resistance, gloss, impact resistance, and etc. A resin composition having good scratch resistance has an outer shell comprising 5-50 parts by weight of a core-shell structure graft resin(A) containing a (meth)acrylic acid alkyl ester component and 95-50 parts by weight of a resin(B) containing 40-100% of a (meth)acrylic acid alkyl ester component. The outer shell is a polymethylmethacrylate resin. In the core-shell structure graft resin(A), the core is butadiene rubber or butadiene/styrene rubber polymer.
Abstract:
PURPOSE: A thermoplastic resin composition having improved laser marking property for white letters, impact resistance, formability, whiteness and sharpness is provided. CONSTITUTION: The thermoplastic resin composition comprises: (A) 20 to 50 parts by weight of a rubbery polymer comprising 30 to 60 parts by weight (based on solid content) of a rubber(a1) having an average particle diameter of 0.1 to 0.2 micrometers and 70 to 40 wt% (based on solid content) of a rubber(a2) having an average particle diameter of 0.3 to 0.6 micrometers; (B) 80 to 50 parts by weight of a monomer mixture comprising 10 to 40 wt% of an aromatic vinyl monomer, 3 to 20 wt% of an unsaturated nitrile monomer and 40 to 80 wt% of an alkyl methacrylate monomer; (C) 0.5 to 1.5 parts by weight of a molecular weight modifier comprising a mixture of mercaptan and terpinolene or alpha-methyl styrene oligomer; (D) 0.2 to 1.0 parts by weight of a coloring pigment; and (E) 0.2 to 1.0 parts by weight of a silicate compound.
Abstract:
PURPOSE: Provided is a styrene-based thermoplastic composite material with improved impact strength and flame retardancy, which contains a rubber modified styrene-based graft copolymer and a styrene-based copolymer. CONSTITUTION: The styrene-based thermoplastic composite material comprises: (A) 5-95pts.wt. of the rubber modified styrene-based graft copolymer obtained by graft-polymerizing (a1) 5-95pts.wt. of a monomer mixture comprising 50-95wt% of styrene, alpha-methyl styrene, halogen or alkyl substituted styrene and 50-5wt% of acrylonitrile, methacrylonitrile, C1-C8 methacrylic acid alkyl ester, maleic anhydride, and etc. and (a2) 95-5pts.wt. of a polymer selected from butadiene rubber, acryl rubber, ethylene/propylene rubber, styrene/ butadiene rubber, and etc.; (B) 95-5pts.wt. of the styrene-based copolymer, obtained by copolymerizing (b1) 50-95wt% of styrene, alpha-methyl styrene, halogen or alkyl substituted styrene and (b2) 5-50wt% of acrylonitrile, methacrylonitrile, C1-C8 methacrylic acid alkyl ester, maleic anhydride, and etc., or a mixture thereof; (C) 5-50pts.wt.(based on the (A)+(B) of 100pts.wt.) of glass fiber treated by a silane-based coupling agent; (D) 0.05-5pts.wt.(based on the (A)+(B) of 100pts.wt.) of an amino silane-based coupling agent; (E) 5-30pts.wt.(based on the (A)+(B) of 100pts.wt.) of a fused halogen compound; 1-10pts.wt.(based on the (A)+(B) of 100pts.wt.) of antimony trioxide.
Abstract:
PURPOSE: Provided is a thermoplastic resin composition, which has excellent impact strength, efflorescence resistance and transparency suitable to be used in an electronic or automobile component, an office instrument and a toy material. CONSTITUTION: The thermoplastic resin composition is produced by the method comprising the steps of: (i) introducing 60-40 parts by weight of a monomer mixture(B) containing an acrylonitrile monomer, a styrene monomer and an alkyl methacrylate together with deionized water, an emulsifier, a molecular weight modifier and a peroxide based oil soluble initiator, in the presence of 40-60 part by weight (solid content basis) of a rubbery polymer latex(A) having an average particle diameter of 0.07-0.15 micrometers, into a reactor, increasing the temperature to 50-80 deg.C, and adding a initiation catalyst, a reducing agent and a complexing agent to perform the graft polymerization; and (ii) introducing a water soluble initiator and adding the monomer mixture(B) for 1-5 hours to perform the graft polymerization, when the polymerization conversion reaches 90% or more in the step (i), wherein 10-30 wt% of the monomer mixture(B) is introduced in the step (i) and 90-70 wt% of the monomer mixture(B) is introduced in the step (ii).
Abstract:
PURPOSE: A thermoplastic resin composition having improved laser marking property for white letters, impact resistance, formability, whiteness and sharpness is provided. CONSTITUTION: The thermoplastic resin composition comprises: (A) 20 to 50 parts by weight of a rubbery polymer comprising 30 to 60 parts by weight (based on solid content) of a rubber(a1) having an average particle diameter of 0.1 to 0.2 micrometers and 70 to 40 wt% (based on solid content) of a rubber(a2) having an average particle diameter of 0.3 to 0.6 micrometers; (B) 80 to 50 parts by weight of a monomer mixture comprising 10 to 40 wt% of an aromatic vinyl monomer, 3 to 20 wt% of an unsaturated nitrile monomer and 40 to 80 wt% of an alkyl methacrylate monomer; (C) 0.5 to 1.5 parts by weight of a molecular weight modifier comprising a mixture of mercaptan and terpinolene or alpha-methyl styrene oligomer; (D) 0.2 to 1.0 parts by weight of a coloring pigment; and (E) 0.2 to 1.0 parts by weight of a silicate compound.