Low emission tin catalysts
Plastic articles with low emission obtainable by polymerization, condensation, and/or cross-linking reaction including the use of metal catalysts wherein said metal catalyst has a low emissivity and is an organotin compound of the general formula R 2 SnX 2 wherein R is a C 1 -C 8 -hydrocarbyl, X is a carboxylate group with 14-20 carbon atoms having at least one olefinic double bond. Moreover, the invention relates to the use of an organotin compound in the manufacture of plastic articles with low emissivity of said organotin compound.
1 . A polyurethane article with low fogging characteristics derived from a polyurethane forming reaction mixture containing as a catalyst for the mixture an organotin compound having low emissivity of the general formula
R 2 SnX 2
wherein R is methyl and X is a carboxylate group with 14-20 carbon atoms having at least one olefinic double bond.
2 . The polyurethane article according to claim 1 , wherein in said organotin compound X is a carboxylate group derived from a carboxylic acid of the formula:
R′—COOH
wherein R′ is a C 13 -C 19 hydrocarbyl group having one or more olefinic double bonds.
3 . The polyurethane article according to claim 2 , wherein said one or more olefinic double bonds are isolated double bonds.
4 . The polyurethane article according to claim 2 , wherein R′ is a substituted or unsubstituted alkenyl group.
5 . The polyurethane article according to claim 2 , wherein in said organotin compound said hydrocarbyl and/or carboxylate group is a linear group.
6 . The polyurethane article according claim 2 , wherein in said organotin compound the carboxylate group is selected from the group consisting of oleate, ricinoleate, linoleate and linolenate.
7 . The polyurethane article according to claim 1 , wherein said organotin compound is liquid at room temperature (20-25° C.).
8 . The polyurethane article according to claim 1 , wherein said polyurethane article is a foamed article.
9 . The polyurethane article according to claim 1 , wherein in the polyurethane forming reaction mixture comprises an isocyanate and a polyol.
10 - 11 . (canceled)
12 . The polyurethane article according to claim 9 , wherein the polyol is selected from the group consisting of polyether polyols, polyester polyols and mixtures thereof.
13 . The polyurethane article according to claim 8 , wherein the polyurethane forming reaction mixture comprises an aliphatic isocyanate and a polyol.
14 . A process for preparing a polyurethane article having low fogging characteristics comprising the step of reacting simultaneously or sequentially an isocyanate with a polyol in the presence of an organotin compound having low emissivity of the general formula
R 2 SnX 2
wherein R is methyl and X is a carboxylate group with 14-20 carbon atoms having at least one olefinic double bond.
15 . The process according to claim 14 , wherein in said organotin compound X is a carboxylate group derived from a carboxylic acid of the formula:
R′—COOH
wherein R′ is a C 13 -C 19 hydrocarbyl group having one or more olefinic double bonds.
16 . The process according to claim 14 , wherein in said organotin compound the carboxylate group is selected from the group consisting of oleate, ricinoleate, linoleate and linolenate.
17 . The process according to claim 14 , wherein said organotin compound is liquid at room temperature (20-25° C.).
18 . The process according to claim 14 , wherein said polyurethane article is a foamed article.
19 . The process according to claim 14 , wherein the step of reacting is a condensation reaction.
20 . An interior lining contained within a motor vehicle, the interior lining comprising the polyurethane article of claim 1 .
21 . An interior lining contained within a motor vehicle, the interior lining comprising the polyurethane article of claim 6 .
22 . An interior lining contained within a motor vehicle, the interior lining comprising the polyurethane foam of claim 8.