The embodiments provide processes for preparing a diisocyanate composition and an optical lens, which are excellent in yield and quality with mitigated environmental problems by using a solid triphosgene composition instead of phosgene gas in the process of preparing a diisocyanate from a diamine through a hydrochloride thereof and by controlling the content of a decomposition product in a triphosgene composition, the b* value according to CIE color coordinate of the triphosgene composition in an organic solvent, or the content of water in the triphosgene.

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) ##STR00001##
(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) ##STR00001##
(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) ##STR00001##
(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)).

The present invention relates to a process for the purification of a product stream from isocyanate synthesis, wherein the isocyanate converted to the gas phase from the product stream is continuously deposited on a rotating cooled roller and removed from the roller. The present invention further relates to an apparatus for the purification of a product stream from isocyanate synthesis, wherein the apparatus has both a heated roller and a condensation roller.

The present invention relates to a process for the purification of a product stream from isocyanate synthesis, wherein the isocyanate converted to the gas phase from the product stream is continuously deposited on a rotating cooled roller and removed from the roller. The present invention further relates to an apparatus for the purification of a product stream from isocyanate synthesis, wherein the apparatus has both a heated roller and a condensation roller.

The present invention relates to a process for the purification of a product stream from isocyanate synthesis, wherein the isocyanate converted to the gas phase from the product stream is continuously deposited on a rotating cooled roller and removed from the roller. The present invention further relates to an apparatus for the purification of a product stream from isocyanate synthesis, wherein the apparatus has both a heated roller and a condensation roller.

The disclosure features novel lipids and compositions involving the same. Nanoparticle compositions include a novel lipid as well as additional lipids such as phospholipids, structural lipids, and PEG lipids. Nanoparticle compositions further including therapeutic and/or prophylactics such as RNA are useful in the delivery of therapeutic and/or prophylactics to mammalian cells or organs to, for example, regulate polypeptide, protein, or gene expression.

The disclosure features novel lipids and compositions involving the same. Nanoparticle compositions include a novel lipid as well as additional lipids such as phospholipids, structural lipids, and PEG lipids. Nanoparticle compositions further including therapeutic and/or prophylactics such as RNA are useful in the delivery of therapeutic and/or prophylactics to mammalian cells or organs to, for example, regulate polypeptide, protein, or gene expression.

The invention relates to a method for the separation of isocyanate monomers from isocyanate-containing mixtures by the provision of the mixture in a solvent and dialysis of the dissolved mixture against the solvent by means of a permeable membrane having a pore size in the range of between 5 and 400 nm. The method may in particular be employed for the separation of isocyanate monomers from prepolymers containing isocyanate groups, with said prepolymers being used for the production of adhesives, insulating, and expanding foams.