Catalyst composition for production of rigid polyurethane foam and isocyanurate-modified rigid polysurethane foam and raw-material composition containing the same

Abstract

An object of the present invention is to provide a catalyst for producing a rigid polyurethane foam and an isocyanurate-modified rigid polyurethane foam excellent in storage stability in the case that water is contained as a blowing agent, and a raw material-blended composition using the same. In the present invention, a catalyst composition comprising the following amine compounds of (A) and (B) and / or (C) is used and further, a raw material-blended composition further containing a polyol component and water is used. (A) A quaternary ammonium salt represented by the following general formula (1): wherein each of R1 to R3 represents a hydrocarbon group having 1 to 12 carbon atoms, R4 represents an alkyl group or an aromatic hydrocarbon group having 1 to 18 carbon atoms, and X represents an organic acid group having an acid dissociation constant (pKa) of 4.8 or less; (B) A hydrophobic amine compound; (C) A heterocyclic tertiary amine compound.

Description

TECHNICAL FIELD [0001] The present invention relates to a catalyst composition used in producing a rigid polyurethane foam and / or an isocyanurate-modified rigid polyurethane foam, a raw material-blended composition containing the catalyst composition, a polyol component and water, and a process for producing a rigid polyurethane foam and / or an isocyanurate-modified rigid polyurethane foam by reacting the raw material-blended composition with a polyisocyanate. BACKGROUND ART [0002] Since rigid polyurethane foams and isocyanurate-modified rigid polyurethane foams are excellent in heat insulation and self-adhesiveness, they are widely used as heat-insulating materials for electric refrigerator, building materials, and the like. The rigid polyurethane foams and isocyanurate-modified rigid polyurethane foams to be used for these applications are generally obtained by a method of mixing, with a polyisocyanate, a raw material-blended composition having mixed therewith a polyol component, a...

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Benefits of technology

[0016] The present invention has been made in view of the above problems, and objects thereof are to provide a catalyst composition capable of enhancing storage stability of a raw material-blended composition containing water or a blowing agent composed of water and specific HC and / or HFC, and a polyester polyol by inhibiting the hydrolysis of the polyester polyol in the raw material-blended composition, a raw material-blended composition containing the catalyst composition, and a process for producing a rigid polyurethane foam and / or an isocyanurate-modified rigid polyurethane foam using the raw material-blended composition.

[0017] As a result of extensive studies for solving the above problems, the present inventors have found that, in the raw material-blended composition containing water or a blowing agent composed of water and specific HC and / or HFC, particularly, the hydrolysis of a polyester polyol is remarkably improved and thus the storage stability of the raw material-blended composition is enhanced by using a catalyst composition containing an amine compound having specific structure and properties, as well as foam physical properties of the resulting rigid polyurethane foam and / or isocyanurate-modified rigid polyurethane foam are excellent. Thus, they have accomplished the present invention.

Problems solved by technology

However, with regard to the raw material-blended compositions containing water, which is an inexpensive and environmentally less problematic blowing agent, or a specific hydrocarbon (HC) and / or hydrofluorocarbon (HFC)-based blowing agent, there arise problems such as a decreased storage stability as well as deteriorated surface brittleness (friability), insufficient adhesiveness to face materials, decreased dimensional stability of foams, and deteriorated flame retardancy, in the rigid polyurethane foam and isocyanurate-modified rigid polyurethane foam products produced therefrom.

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