The invention relates to a process for producing a polyisocyanate composition comprising addition of at least one isocyanate-inert solvent to at least one polyisocyanate, characterized in that the addition of the solvent is carried out in one or more stages and at least one of these stages is performed as a continuous dilution. The invention further relates to the polyisocyanate compositions obtainable by the process, to the use of the polyisocyanate compositions, to a two-component system containing the polyisocyanate composition and to composite systems produced with the two-component system.

A resist underlayer composition includes (A) a polymer including a structural unit represented by Chemical Formula 1, a compound represented by Chemical Formula 2, or a combination thereof; (B) a polymer including a structure in which at least one moiety represented by Chemical Formula 3 or Chemical Formula 4 and a moiety represented by Chemical Formula 7 are bound to each other; and (C) a solvent:

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A resist underlayer composition includes (A) a polymer including a structural unit represented by Chemical Formula 1, a compound represented by Chemical Formula 2, or a combination thereof; (B) a polymer including a structure in which at least one moiety represented by Chemical Formula 3 or Chemical Formula 4 and a moiety represented by Chemical Formula 7 are bound to each other; and (C) a solvent:

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A composition is provided including a compound (A) represented by Formula (1) and a compound (B) represented by Formula (2), wherein the compound (B) is contained in an amount of 0.00002 to 0.2 parts by mass with respect to 100 parts by mass of the compound (A):

(R.sub.1—COO).sub.n—R.sub.2—(NCO).sub.m   (1)

(in Formula (1), R.sub.1 is an ethylenically unsaturated group having 2 to 7 carbon atoms; R.sub.2 is an (m+n)-valent hydrocarbon group having 1 to 7 carbon atoms; and n and m are each an integer of 1 or 2)

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(in Formula (2), R is (—R.sub.2—(OCO—R.sub.1), and R.sub.1 and R.sub.2 are the same as those in Formula (1)).

A composition is provided including a compound (A) represented by Formula (1) and a compound (B) represented by Formula (2), wherein the compound (B) is contained in an amount of 0.00002 to 0.2 parts by mass with respect to 100 parts by mass of the compound (A):

(R.sub.1—COO).sub.n—R.sub.2—(NCO).sub.m   (1)

(in Formula (1), R.sub.1 is an ethylenically unsaturated group having 2 to 7 carbon atoms; R.sub.2 is an (m+n)-valent hydrocarbon group having 1 to 7 carbon atoms; and n and m are each an integer of 1 or 2)

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(in Formula (2), R is (—R.sub.2—(OCO—R.sub.1), and R.sub.1 and R.sub.2 are the same as those in Formula (1)).

This nonaqueous electrolyte secondary battery is provided with a positive electrode, a negative electrode and a non-aqueous electrolyte. The non-aqueous electrolyte contains: a non-aqueous solvent that contains a fluorine-containing cyclic carbonate; an isocyanuric acid derivative such as triallyl isocyanurate; and a cyclic carboxylic acid anhydride such as diglycolic acid anhydride.

This nonaqueous electrolyte secondary battery is provided with a positive electrode, a negative electrode and a non-aqueous electrolyte. The non-aqueous electrolyte contains: a non-aqueous solvent that contains a fluorine-containing cyclic carbonate; an isocyanuric acid derivative such as triallyl isocyanurate; and a cyclic carboxylic acid anhydride such as diglycolic acid anhydride.

The present invention provides a process for preparing isocyanurate from diisocyanate, in which i) prior to the reaction the peroxide content of the diisocyanate to be used is determined, and thereafter ii) a) if the determined peroxide content is greater than 10 mmol/kg, the diisocyanate is subjected to distillative purification until the determined peroxide content is less than or equal to 10 mmol/kg, orb) if the determined peroxide content is less than or equal to 10 mmol/kg, no further action is taken, and iii) distilled diisocyanate with respect to a) and/or untreated diisocyanate with respect to b) is subsequently converted to isocyanurate.

The present invention provides a process for preparing isocyanurate from diisocyanate, in which i) prior to the reaction the peroxide content of the diisocyanate to be used is determined, and thereafter ii) a) if the determined peroxide content is greater than 10 mmol/kg, the diisocyanate is subjected to distillative purification until the determined peroxide content is less than or equal to 10 mmol/kg, orb) if the determined peroxide content is less than or equal to 10 mmol/kg, no further action is taken, and iii) distilled diisocyanate with respect to a) and/or untreated diisocyanate with respect to b) is subsequently converted to isocyanurate.

A compound represented by the following formula (1):

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wherein R.sup.1 is a monovalent organic group containing a polyether chain; X.sup.1 and X.sup.2 are each individually a monovalent group; and the polyether chain is a chain represented by the following formula: (OC.sub.6F.sub.12).sub.m11(OC.sub.5F.sub.10).sub.m12(OC.sub.4F.sub.8).sub.m13(OC.sub.3X.sup.10.sub.6).sub.m14(OC.sub.2F.sub.4).sub.m15(OCF.sub.2).sub.m16, wherein m11, m12, m13, m14, m15, and m16 are each individually an integer of 0 or 1 or greater; X.sup.10s are each individually H, F, or Cl; the repeating units are present in any order; and the sum of m11 to m16 is an integer of 10 or greater, R.sup.1 being other than those containing a urethane bond.