Polyacetal resin composition excellent in heat stability and surface processability and process for surface treating same
AssigneeAsahi Kasei Kogyo Kabushiki Kaisha
InventorsYoshihiro Hattori, Takashi Watanabe, Kunio Maeda
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Abstract
A polyacetal resin composition excellent in heat stability and surface processability which comprises (a) about 100 parts by weight of polyacetal resin, (b) about 2 to about 35 parts by weight of a carbonate, phosphate or acetate of a metal belonging to Group II of the Periodic Table or a mixture thereof and (c) about 0.01 to about 20 parts by weight of a polymer, a copolymer or a mixture thereof of a compound selected from the group consisting of unsaturated polyesters, alkyl esters of acrylic acid or methacrylic acid, amides of acrylic acid or methacrylic acid, triallyl cyanurate, diallyl phthalate, vinyl acetate and divinylbenzene.
Claims34
A surface-treated polyacetal resin product having no surface cracks noticeable to the naked eye and having surface characteristics such that when chemical nickel is deposited thereon by immersing the product in an aqueous chemical nickel solution at 40.degree. C. for 10 minutes to deposit chemical nickel on the surface thereof, eluting the deposited chemical nickel from said surface, and determining the amount of chemical nickel eluted, the nickel weight obtained by dividing the area of the surface deposited with nickel to give the amount of chemical nickel deposited is 85-150 mg/dm.sup.2 and wherein the peeling strength of a plated metal layer plated by chemically plating a nickel layer by means of a chemical nickel solution, then electroplating with copper so as to give a mean plating thickness of about 40.mu., drawing at least two parallel breaking lines or nicks on the plated metal surface at a distance of 10 mm apart, pulling or stretching the plated metal layer between said lines or nicks in a direction perpendicular to said surface and measuring the stress necessary for peeling is 1.0 kg/cm or more;
- said surface-treated polyacetal resin product being obtained by a process comprising (1) blending (a) about 100 parts by weight of polyacetal resin, (b) about 2 to about 35 parts by weight of a carbonate, phosphate or acetate of a metal belonging to Group II of the Periodic Table or a mixture thereof and (c) about 0.01 to about 20 parts by weight of a polymer, a copolymer or a mixture thereof of a compound selected from the group consisting of unsaturated polyesters, alkyl esters of acrylic acid or methacrylic acid, amides of acrylic acid or methacrylic acid, triallyl cyanurate, diallyl phthalate, vinyl acetate and divinylbenzene;
- (2) molding the resulting polyacetal resin composition into the desired configuration;
- and (3) conditioning the resulting molded product by dipping said molded product in an aqueous solution consisting essentially of sulfuric acid.
A surface-treated polyacetal resin product having no surface cracks noticeable to the naked eye and having surface characteristics such that when chemical nickel is deposited thereon by immersing the product in an aqueous chemical nickel solution at 40.degree. C. for 10 minutes to deposit chemical nickel on the surface thereof, eluting the deposited chemical nickel from said surface, and determining the amount of chemical nickel eluted, the nickel weight obtained by dividing the area of the surface deposited with nickel to give the amount of chemical nickel deposited is 85-150 mg/dm.sup.2 and wherein the peeling strength of a plated metal layer plated by chemically plating a nickel layer by means of a chemical nickel solution, then electroplating with copper so as to give a mean plating thickness of about 40.mu., drawing at least two parallel breaking lines or nicks in a direction perpendicular to said surface and measuring the stress necessary for peeling is 1.0 kg/cm or more;
- said surface-treated polyacetal resin product being obtained by a process comprising (1) blending (a) about 100 parts by weight of polyacetal resin, (b) about 2 to about 35 parts by weight of a carbonate, phosphate or acetate of a metal belonging to Group II of the Periodic Table or a mixture thereof and (c) about 0.01 to about 20 parts by weight of a polymer, a copolymer or a mixture thereof of a compound selected from the group consisting of unsaturated polyesters, alkyl esters of acrylic acid or methacrylic acid, amides of acrylic acid or methacrylic acid, triallyl cyanurate, diallyl phthalate, vinyl acetate and divinylbenzene;
- (2) molding the resulting polyacetal resin composition into the desired configuration;
- and (3) conditioning the resulting molded product by dipping said molded product in an aqueous solution containing sulfuric acid but not more than about 4% by weight of potassium bichromate.
A surface-treated polyacetal resin product having no surface cracks noticeable to the naked eye and having surface characteristics such that when chemical nickel is deposited thereon by immersing the product in an aqueous chemical nickel solution at 40.degree. C. for 10 minutes to deposit chemical nickel on the surface thereof, eluting the deposited chemical nickel from said surface, and determining the amount of chemical nickel eluted, the nickel weight obtained by dividing the area of the surface deposited with nickel to give the amount of chemical nickel deposited is 85-150 mg/dm.sup.2 and wherein the peeling strength of a plated metal layer plated by chemically plating a nickel layer by means of a chemical nickel solution, then electroplating with copper so as to give a mean plating thickness of about 40.mu., drawing at least two parallel breaking lines or nicks on the plated metal surface at a distance of 10 mm apart, pulling or stretching the plated metal layer between said lines or nicks in a direction perpendicular to said surface and measuring the stress necessary for peeling is 1.0 kg/cm or more;
- said surface-treated polyacetal resin product being obtained by a process comprising (1) blending (a) about 100 parts by weight of polyacetal resin, (b) about 2 to about 35 parts by weight of a carbonate, phosphate or acetate of a metal belonging to Group II of the Periodic Table or a mixture thereof and (c) about 0.01 to about 20 parts by weight of a polymer, a copolymer or a mixture thereof of a compound selected from the group consisting of unsaturated polyesters, alkyl esters of acrylic acid or methacrylic acid, amides of acrylic acid or methacrylic acid, triallyl cyanurate, diallyl phthalate, vinyl acetate and divinylbenzene;
- (2) molding the resulting polyacetal resin composition into the desired configuration;
- and (3) conditioning the resulting molded product by dipping said molded product in an aqueous solution consisting essentially of sulfuric acid and phosphoric acid.
Dependencies are inferred from the claim text.