Heat insulation panels manufactured from modified polyisocyanurate foams
AssigneesDaido Steel Sheet Corporation, Nisshinbo Industries, Inc.
InventorsMorihiro Matsumoto, Noboru Yoshida, Kiyotake Morimoto, Satoshi Nakamura
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Abstract
Heat insulation panels made from plates and the modified polyisocyanurate foams provided by a reaction of a polyisocyanate with a polyol composition mixture comprising a polyol, water, a trimerization catalyst, a carbodiimide catalyst, and an aromatic compound used as a chain extender. An amount of the aromatic compound used in the preparation is 0.5 to 10.0% by weight with respect to a total weight of the polyisocyanate and the polyol mixture.
Claims8
A heat insulation panel comprising a foam of modified polyisocyanurate which is provided by a reaction of (a) a polyisocyanate having an equivalent ratio (NCO/OH) of 1.8 or more, a polyol having a hydroxyl value of 50-400 mg KOH/g, water reacting with (a) to form carbon dioxide as a blowing agent, a first catalyst promoting isocyanurate linkages, (e) a second catalyst of phospholene oxide promoting carbodiimide linkages and generating carbon dioxide as a blowing agent, and an aromatic compound represented by one of the following formulas (I) and (II):
- ##STR8## wherein R.sub.1 and R.sub.2 represent one of H and --CH.sub.3, R.sub.3 and R.sub.4 represents one of the following (.alpha.) and (.beta.):
- ##STR9## R.sub.5 and R.sub.6 represent C.sub.1 -C.sub.4 alkyl group, and n represents an integer from 1 to 4;
- and a pair of plates for sandwiching said foam.
An insulation panel manufactured by the following steps of:
- a) preparing a mixture of (i) a polyisocyanate having an equivalent ratio (NCO/OH) of 1.8 or more, (ii) a polyol having a hydroxyl value of 50-400 mg KOH/g, (iii) water reacting with (i) to form carbon dioxide as a blowing agent, (iv) a first catalyst promoting isocyanurate linkages, (v) a second catalyst of phospholene oxide promoting carbodiimide linkages and generating carbon dioxide as a blowing agent, and (vi) an aromatic compound, represented by one of the following formulas (I) and (II):
- ##STR11## wherein R.sub.1 and R.sub.2 represent one of H and --CH.sub.3, R.sub.3 and R.sub.4 represent one of the following (.alpha.) and (.beta.):
- ##STR12## R.sub.5 and R.sub.6 represent C.sub.1 -C.sub.4 alkyl group, and n represents an integer from 1 to 4;
- b) injecting said mixture between a pair of spaced plates, and
- c) reacting said mixture between said spaced plates, so as to provide a foam of modified polyisocyanurate adhered to said plates.
A method of manufacturing a heat insulation panel comprising a foam of modified polyisocyanurate which is provided by a reaction of (a) a polyisocyanate having an equivalent ratio (NCO/OH) of 1.8 or more, (b) a polyol having a hydroxyl value of 50-400 mg KOH/g, (c) water reacting with (a) to form carbon dioxide as a blowing agent, (d) a first catalyst promoting isocyanurate linkages, (e) a second catalyst of phospholene oxide promoting carbodiimide linkages and generating carbon dioxide as a blowing agent, and (f) an aromatic compound represented by one of the following formulas (I) and (II):
- ##STR13## wherein R.sub.1 and R.sub.2 represent one of H and --CH.sub.3, R.sub.3 and R.sub.4 represent one of the following (.alpha.) and (.beta.):
- ##STR14## R.sub.5 and R.sub.6 represent C.sub.1 -C.sub.4 alkyl group, and n represents an integer from 1 to 4;
- comprising the following steps of:
- a) preparing a mixture of said isocyanate, polyols, catalysts, water, and aromatic compound,
- b) injecting said mixture between a pair of said spaced plates, and
- c) reacting said mixture between said spaced plates, so as to provide said foam adhered to said plates.
Dependencies are inferred from the claim text.