Premixes for the preparation of polyurethane foams
AssigneeSolvay SA
InventorsPierre Barthelemy, Annie Leroy
Life of this patent
Estimating the term…
Abstract
Premixes intended for the preparation of polyurethane or modified polyurethane foams comprising at least one polyol and 1,1,1,3,3-pentafluorobutane as blowing agent. These premixes have proved to be particularly stable.
Claims14
A premix for the preparation of polyurethane or modified polyurethane foam, comprising:
- a) at least one polyol,
- b) 1,1,1,3,3-pentafluorobutane as blowing agent, and
- c) a catalyst comprising at least one compound which catalyses a polyol/isocyanate reaction and, up to one compound, other than an alkali metal carboxylate or a hydroxyalkylammonium carboxylate, which catalyses the trimerization of isocyanates said premix not stabilized with respect to the potential degradation of the 1,1,1,3,3-pentafluorobutane caused by the polyol, and adapted to be stored without degradation of 1,1,1,3,3-pentafluorobutane.
A process for the manufacture of polyurethane or modified polyurethane foam comprising reacting at least one polyol in the presence of 1,1,1,3,3,-pentafluorobutane and of at least one catalyst, wherein the polyol and the 1,1,1,3,3-pentafluorobutane are used as a mixture which is not stabilized with respect to the potential degradation of the 1,1,1,3,3-pentafluorobutane caused by the polyol.
A premix for the preparation of polyurethane or modified polyurethane foam not stabilized with respect to the potential degradation of the 1,1,1,3,3-pentafluorobutane caused by the polyol, and, consisting essentially of:
- a) at least one polyol,
- b) 1,1,1,3,3-pentafluorobutane as blowing agent and
- c) a catalyst comprising at least one compound which catalyses a polyol/isocyanate reaction and, up to one compound, other than an alkali metal carboxylate or a hydroxyalkylammonium carboxylate, which catalyses the trimerization of isocyanates.
A premix for the preparation of polyurethane modified polyurethane foam, consisting of:
- a) at least one polyol,
- b) 1,1,1,3,3-pentafluorobutane as blowing agent,
- c) a catalyst comprising at least one compound which catalyses a polyol/isocyanate reaction and, up to one compound, other than an alkali metal carboxylate or a hydroxyalkylammonium carboxylate, which catalyses the trimerization of isocyanates, and optionally
- d) at least one additive selected from water, surface-active agents, antioxidizing agents, flame-retardant agents and pigments.
Dependencies are inferred from the claim text.