Esters containing bonded fluorocarbon and oxypropylenealkylether groups, emulsions containing these esters and their use for the preparation of cellular plastics by polyisocyanate polyaddition
First Claim
1. A blowing agent-containing emulsion which has a long shelf life and containsi) at least one partially fluorinated or perfluorinated aliphatic and/or cycloaliphatic hydrocarbon of 3 to carbon atoms which is sparingly soluble or insoluble in (ii), and/or sulfur hexafluoride,ii) at least one organic and/or modified organic polyisocyanate and at least one relatively high molecular weight compound having at least two reactive hydrogen atoms or a mixture of at least one relatively high molecular weight compound having at least two reactive hydrogen atoms and at least one low molecular weight chain extender and/or crosslinking agent andiii) at least one ester of the formula ##STR8## where Rf is straight-chain or branched, partially fluorinated or perfluorinated alkyl of 2 to 10 carbon atoms, partially fluorinated or perfluorinated cycloalkyl of 4 to 8 carbon atoms, perfluorophenyl or perfluoroalkylphenyl where the perfluoroalkyl radical is of 1 to 6 carbon atoms, R is straight-chain or branched alkyl of 1 to 4 carbon atoms and n is an integer from 2 to 70.
1 Assignment
0 Petitions
Accused Products
Abstract
Novel esters containing bonded fluorocarbon and oxypropylenealkylether groups and of the formula ##STR1## where Rf is straight-chain or branched, partially fluorinated or perfluorinated alkyl of 2 to 10 carbon atoms, partially fluorinated or perfluorinated cycloalkyl of 4 to 8 carbon atoms,
perfluorophenyl or
perfluoroalkylphenyl where the perfluoroalkyl radical is of 1 to 6 carbon atoms,
R is straight-chain or branched alkyl of 1 to 4 carbon atoms and
n is an integer from 2 to 70,
blowing agent-containing emulsions which have a long shelf life and contain at least one partially fluorinated or perfluorinated (cyclo)aliphatic hydrocarbon of 3 to 8 carbon atoms and/or sulfur hexafluoride, at least one unmodified or modified organic polyisocyanate or a relatively high molecular weight reactive hydrogen compound and at least one of the abovementioned carboxylic or carbamic esters, and the use of these emulsions for the preparation of cellular plastics by the polyisocyanate polyaddition method.
-
Citations
20 Claims
-
1. A blowing agent-containing emulsion which has a long shelf life and contains
i) at least one partially fluorinated or perfluorinated aliphatic and/or cycloaliphatic hydrocarbon of 3 to carbon atoms which is sparingly soluble or insoluble in (ii), and/or sulfur hexafluoride, ii) at least one organic and/or modified organic polyisocyanate and at least one relatively high molecular weight compound having at least two reactive hydrogen atoms or a mixture of at least one relatively high molecular weight compound having at least two reactive hydrogen atoms and at least one low molecular weight chain extender and/or crosslinking agent and iii) at least one ester of the formula ##STR8## where Rf is straight-chain or branched, partially fluorinated or perfluorinated alkyl of 2 to 10 carbon atoms, partially fluorinated or perfluorinated cycloalkyl of 4 to 8 carbon atoms, perfluorophenyl or perfluoroalkylphenyl where the perfluoroalkyl radical is of 1 to 6 carbon atoms, R is straight-chain or branched alkyl of 1 to 4 carbon atoms and n is an integer from 2 to 70.
-
2. A blowing agent-containing emulsion which has a long shelf life and consists of
i) from 1 to 150 parts by weight, per 100 parts by weight of (ii) of at least one partially fluorinated or perfluorinated aliphatic and/or cycloaliphatic hydrocarbon of 3 to 8 carbon atoms which is sparingly soluble or insoluble in (ii), and/or sulfur hexafluoride, ii) at least one relatively high molecular weight compound having at least two reactive hydrogen atoms or a mixture of at least one relatively high molecular weight compound having at least two reactive hydrogen atoms and at least one low molecular weight chain extender and/or crosslinking agent, iii) from 0.01 to 6.0 parts by weight, per 100 parts by weight of (ii), of at least one ester of the formula ##STR9## where Rf is straight-chain or branched, partially fluorinated or perfluorinated alkyl of 2 to 10 carbon atoms, partially fluorinated or perfluorinated cycloalkyl of 4 to 8 carbon atoms, perfluorophenyl or perfluoroalkylphenyl where the perfluoroalkyl radical is of 1 to 6 carbon atoms, R is straight-chain or branched alkyl of 1 to 4 carbon atoms and n is an integer from 2 to 70, and iiii) from 0 to 5.0 parts by weight, per 100 parts by weight of (ii), of at least one polysiloxane having polyether side chains as a foam stabilizer.
-
8. A blowing agent-containing emulsion which has a long shelf life and contains
i) at least one partially fluorinated or perfluorinated aliphatic and/or cycloaliphatic hydrocarbon of 3 to 8 carbon atoms which is sparingly soluble or insoluble in (ii), and/or sulfur hexafluoride, ii) at least one organic and/or modified organic polyisocyanate and at least one relatively high molecular weight compound having at least two reactive hydrogen atoms or a mixture of at least one relatively high molecular weight compound having at least two reactive hydrogen atoms and at least one low molecular weight chain extender and/or crosslinking agent and iii) at least one ester of the formula ##STR11## where Rf is straight-chain or branched, partially fluorinated or perfluorinated alkyl of 2 to 10 carbon atoms, partially fluorinated perfluorinated cycloalkyl of 4 to 8 carbon atoms, perfluorophenyl or perfluoroalkylphenyl where the perfluoroalkyl radical is of 1 to 6 carbon atoms, R is straight-chain or branched alkyl of 1 to 4 carbon atoms and n is an integer from 2 to 70, and iiii) alternatively, at least one polysiloxane having polyether side chains for the preparation of cellular plastics by the polyisocyanate polyaddition method.
Specification