Abstract: An impact resistant thermoplastic resin composition which comprises:100 parts by weight of a resin mixture comprising from 20 to 80% by weight of a polyamide resin (A) and from 20 to 80% by weight of a graft copolymer (B) composed of from 40 to 60 parts by weight of a conjugated diene rubber and from 40 to 60 parts by weight of a monomer mixture comprising from 60 to 80% by weight of an aromatic vinyl monomer component and from 20 to 40% by weight of a vinyl cyanide monomer component (provided that the total amount of said monomer mixture is 100% by weight) wherein the average particle size of graft rubber is from 0.2 to 1.0 .mu.m, the graft ratio is from 40 to 80%, and the specific viscosity of a resinous component composed of said monomer components is from 0.05 to 0.10;from 0.01 to 40 parts by weight of a copolymer (C) comprising from 50 to 80% by weight of an aromatic vinyl monomer component, from 0.01 to 30% by weight of an .alpha.,.beta.

Abstract: A heat and impact resistant thermoplastic resin composition which comprises:100 parts by weight of a resin mixture comprising from 20 to 80% by weight of a polyamide resin (A) and from 20 to 80% by weight of a graft copolymer resin (B) obtained by graft polymerizing from 30 to 65 parts by weight of a monomer mixture comprising from 30 to 80% by weight of an aromatic vinyl monomer, from 5 to 65% by weight of an N-substituted maleimide monomer and from 0 to 40% by weight of other vinyl monomer copolymerizable with these monomers (provided that the total amount of said monomer mixture is 100% by weight) to from 35 to 70 parts by weight of a conjugated diene rubber;from 0 to 40 parts by weight of a copolymer resin (C) comprising from 30 to 80% by weight of an aromatic vinyl monomer component, from 5 to 65% by weight of an N-substituted maleimide monomer component and from 0 to 40% by weight of other vinyl monomer component copolymerizable with these monomers (provided that the total amount of the monomer componen

Abstract: A radiographic intensifying screen which comprises a support, a fluorescent layer formed thereon comprising an X-ray luminescent phosphor and a binder resin supporting the X-ray luminescent phosphor in a dispersed state, and a protective layer formed on the fluorescent layer, wherein the proportion of the binder resin to the X-ray luminescent phosphor is within a range of from 4 to 8% by weight on the average of the entire fluorescent layer, and the binder resin is unevenly distributed in the fluorescent layer so that the proportion of the binder resin to the X-ray luminescent phosphor in the fluorescent layer in the vicinity of the protective layer is higher than the proportion of the binder resin to the X-ray excitable phosphor in the remainder of the fluorescent layer.

Abstract: A process for producing a heat resistant resin composition, which comprises polymerizing by suspension polymerization a monomer mixture comprising from 30 to 80% by weight of an aromatic vinyl monomer, from 10 to 50% by weight of an N-substituted maleimide monomer, from 10 to 40% by weight of a vinyl cyanide monomer and from 0 to 30% by weight of other vinyl monomer copolymerizable therewith, characterized in that the polymerization reaction is initiated in the presence of a part of the monomer mixture and a part of a suspending agent in the suspension polymerization system prior to the initiation of the polymerization reaction, and then during the polymerization, the rest of the monomer mixture and the rest of the suspending agent are added to the polymerization system continuously or intermittently to complete the polymerization reaction.

Abstract: A heat and impact resistant composition comprising:(A) 5-89 parts by weight of a graft polymer prepared by graft polymerizing 30-75 parts by weight of a mixture of 30-80% of an aromatic vinyl monomer, 10-50% of an N-substituted maleimide monomer, 10-45% of a vinyl cyanide monomer and 0-30% of another copolymerizable vinyl monomer onto 25-70 parts by weight of a diene rubber (a);(B) 10-90 parts by weight of a copolymer obtained by polymerizing a mixture of 30-80% of an aromatic vinyl monomer, 10-50% of an N-substituted maleimide monomer, 10-40% of a vinyl cyanide monomer and 0-30% of another copolymerizable vinyl monomer, or (B') an imido group--containing adduct of a copolymer obtained by reacting a primary amine and/or ammonia with a copolymer obtained by polymerizing a mixture of 30-80% of an aromatic vinyl monomer, 5-50% of an alpha, beta-unsaturated dicarboxylic acid anhydride monomer and 0-40% of another copolymerizable vinyl monomer;(C) 1-45 parts be weight of a graft polymer made by graft polymerizing

Abstract: A gradient radiation image conversion sheet, comprising a protective layer a fluorescent layer and a support layer, and the transmissions of said protective layer and/or said fluorescent layer are partially changed and the dots of the print of said gradient patterns and the border between the printed area and the unprinted area are blurred. The gradient image conversion sheet has a gradation area in which the change in transmission is extremely smooth and a speed ratio which may be set in a relatively wide range, and the sheet can be produced through a mass-production system to give products of constant quality.

Abstract: A gradient intensifying screen comprising a support, a fluorescent layer formed on the support and a transparent protective layer formed on the fluorescent layer, characterized in that at least a part of the transparent protective layer is dyed with a dyestuff so that the light transmission of the transparent protective layer is partially varied.

Abstract: An intensifying screen comprising: a support, a fluorescent layer on the support and a protective layer on the fluorescent layer, wherein the fluorescent layer is composed essentially of a blue emitting phosphor selected from the group consisting of (1) a M.sup.II WO.sub.4 phosphor wherein M.sup.II is at least one of Mg, Ca, Zn and Cd, (2) a CaWO.sub.4 phosphor, (3) a BaSO.sub.4 :Pb phosphor, (4) a BaSO.sub.4 :Eu.sup.2+ phosphor, (5) a (Ba, Sr)SO.sub.4 :Eu.sup.2+ phosphor, (6) a MeF.sub.2.pMe'X.sub.2.qKX'.rMe"SO.sub.4 :mEu.sup.2+, nTb.sup.3+ phosphor, wherein Me is at least one of Mg, Ca, Sr and Ba, each of Me' and Me" is at least one of Ca, Sr and Ba, each of X and X' is at least one of Cl and Br, and p, q, r, m and n are numbers which satisfy the conditions of 0.80.ltoreq.p.ltoreq.1.5, 0.ltoreq.q.ltoreq.2.0, 0.ltoreq.r.ltoreq.1.0, 0.001.ltoreq.m.ltoreq.0.10 and 0.ltoreq.n.ltoreq.0.05, respectively, provided q+r.noteq.0, (7) a LnOX:Tm phosphor wherein Ln is La or Gd, and X is Cl or Br, (8) a Ln(Ta.sub.

Abstract: A heat resistant resin composition comprising from 10 to 90% by weight of a copolymer A and from 90 to 10% by weight of a copolymer B, in which the copolymer A is composed of an N-aromatic maleimide monomer residue, a maleimide monomer residue, a vinyl aromatic monomer residue and, optionally other vinyl monomer residue, the total content of the N-aromatic maleimide monomer residue and the maleimide monomer residue being from 10 to 45%, the content of the N-aromatic maleimide monomer residue being greater than the content of the maleimide monomer residue, the content of the vinyl aromatic monomer residue being from 90 to 55% and the content of said other vinyl monomer residue being from 0 to 20%, and the copolymer B is composed of a vinyl cyanide monomer residue, a vinyl aromatic monomer residue and, optionally other vinyl monomer residue, the content of the vinyl cyanide monomer residue being from 20 to 55%, the content of the vinyl aromatic monomer residue being from 80 to 45% and the content of said other

Abstract: A radiographic intensifying screen comprising a support and a fluorescent layer formed on the support, characterized in that said fluorescent layer is composed essentially of a rare earth oxysulfide phosphor represented by the formula:(Ln.sub.1-x-y-z' Tb.sub.x, R.sub.y, A.sub.z).sub.2 O.sub.2 Swhere Ln is at least one element selected from the group consisting of La, Gd, Y and Lu, R is at least one element selected from the group consisting of Nd and Ho, A is at least one element selected from the group consisting of Pr, Er and Yb, and x, y and z are numbers within the ranges of 0.001.ltoreq.x.ltoreq.0.02, 0.0001.ltoreq.y.ltoreq.0.01 and O.ltoreq.z.ltoreq.0.01, respectively, and x.gtoreq.y+z.

Abstract: A heat resistant resin composition comprising from 10 to 90% by weight of a copolymer A and from 90 to 10% by weight of a copolymer B, in which the copolymer A is composed of an N-aromatic maleimide monomer residue, a maleimide monomer residue, a vinyl aromatic monomer residue and, optionally other vinyl monomer residue, the total content of the N-aromatic maleimide monomer residue and the maleimide monomer residue being from 10 to 45%, the content of the N-aromatic maleimide monomer residue being greater than the content of the maleimide monomer residue, the content of the vinyl aromatic monomer residue being from 90 to 55% and the content of said other vinyl monomer residue being from 0 to 20%, and the copolymer B is composed of a vinyl cyanide monomer residue, a vinyl aromatic monomer residue and, optionally other vinyl monomer residue, the content of the vinyl cyanide monomer residue being from 20 to 55%, the content of the vinyl aromatic monomer residue being from 80 to 45% and the content of said other

Abstract: An X-ray intensifying screen having a high speed and capable of providing good image quality superior in sharpness, granularity and contrast comprising a support having formed thereon a fluorescent layer composed of a complex halide phosphor represented by the composition formula shown below and having further formed on the fluorescent layer another fluorescent layer composed of a calcium tungstate phosphor:(Me.sub.1-f, Mg.sub.f)F.sub.2 .multidot.aMe'X.sub.2 .multidot.bKX'.multidot.cMe"SO.sub.4 :dEu.sup.2+,eTb.sup.3+wherein Me, Me' and Me" each represents at least one of the alkaline earth metals of the group consisting of barium, strontium and calcium; X and X' each represents at least one of chlorine and bromine; and a, b, c, d, e and f are the numbers defined by one of the following five combinations:1. 0.80.ltoreq.a.sub.1 .ltoreq.1.50, 0.10.ltoreq.b.sub.1 .ltoreq.1.50, c.sub.1 .dbd.0, 0.001.ltoreq.d.sub.1 .ltoreq.0.20, e.sub.1 .dbd.0 and f.sub.1 .dbd.0;2. 0.30.ltoreq.a.sub.2 .ltoreq.1.50, 0.10.ltoreq.b.