Antistatic resin-made container and kit for production thereof
An antistatic resin-made container is formed by solution-bonding a plurality of resinous parts thereof to each other, preferably with acetonitrile as the solvent, wherein each resinous part is formed of an antistatic resin composition including (a) a polyacrylonitrile resin: 50-95 wt. % and (b) a hydrophilic polymer: 5-50 wt. %. The thus-formed antistatic resin-made container is suitable for accommodating a precision product, such as a photomask, or a semi-product thereof, which is produced in an extremely small number but requires a high level of antistatic property of the container therefor.
1 . An antistatic resin-made container for a precision (semi-)product having a structure comprising a plurality of resinous parts bonded with a solvent to each other, wherein each of the plurality of resinous parts comprises an antistatic resin composition comprising (a) a polyacrylonitrile resin: 50-95 wt. % and (b) a hydrophilic polymer: 5-50 wt. %.
2 . An antistatic resin-made container according to claim 1 , wherein the antistatic resin composition comprises 80-95 wt. % of the polyacrylonitrile resin (a) and 5-20 wt. % of the hydrophilic polymer (b).
3 . An antistatic resin-made container according to claim 1 , wherein the hydrophilic polymer (a) is a polyalkylene oxide group-containing polymer.
4 . An antistatic resin-made container according to claim 3 , wherein the hydrophilic polymer (b) is a graft-copolymer obtained by graft-polymerizing (iv) 5 to 95 wt. parts of at least one species of ethylenically unsaturated monomer onto a rubber trunk polymer in an amount of 5 to 95 wt. parts (giving a total of 100 wt. parts together with the ethylenically unsaturated monomer), which rubber trunk polymer in turn is a copolymer of
(i) 50-95 wt. % of at least one monomer selected from conjugated dienes and acrylate esters,
(ii) 5-50 wt. % of at least one species of monomers each having 4 to 500 alkylene oxide groups and an ethylenic unsaturation, and
(iii) 0-40 wt. % of at least one species of ethylenically unsaturated monomer copolymerizable with the conjugated diene or acrylate ester (i).
5 . An antistatic resin-made container according to claim 1 , wherein the antistatic resin composition further comprises a surfactant.
6 . An antistatic resin-made container according to claim 1 , wherein the antistatic resin composition further comprises a polyvalent metal compound.
7 . An antistatic resin-made container according to claim 1 , wherein the polyacrylonitrile resin (a) exhibits a flexural rigidity of at least 2 GPa.
8 . A kit for producing an antistatic resin-made container, including (1) an antistatic resin sheet comprising (a) a polyacrylonitrile resin: 50-95 wt. % and (b) a hydrophilic polymer: 5-50 wt. %, and (2) solvent acetonitrile.
9 . A kit according to claim 8 , wherein the antistatic resin sheet has thickness of 1-20 mm.
10 . A kit according to claim 8 wherein the antistatic resin sheet has a flexural rigidity of at least 1.5 GPa, a Taber abrasion of at most 200 mg and a volumetric intrinsic resistivity of at most 10 11 ohm.m.