The Use of Polymeric Polyisocyanate in Rigid Urethane Foams

Gemeinhardt, Péter; Backus, J.K.; Darr, W. C.; Szabat, J.F.

doi:10.1177/0021955x6700300502

Cited by 2 publications

(3 citation statements)

References 3 publications

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“…Rigid polyurethane foams, which utilize aromatic polymeric isocyanates having a functionality of 2.3 to 3.2 and polyols with an average functionality of at least 4, possess little melting character and on burning form volatile decomposition products, a tarry distillate, and a carbonaceous residue. The heterocyclic nucleus of most polyether polyol components (31) and the high degree of aromaticity of the isocyanate component (35) in rigid foam systems further retard burning. Moreover, fluorocarbon blowing agents contained in their closed cellular structure also reduce flammability.…”

Section: Commercial Flame Retardants For Polyurethane Foamsmentioning

confidence: 99%

“…By Alkoxylation of Polyphosphoric Acid-Polyhydric Alcohol Condensation Products. Polyalkylene ether polyols containing phosphorus, especially those derived from phosphoric acids, have been available for the past 35 years (44)(45)(46). Since the advent of flameproofing polyurethane foams, however, the patent literature is replete with examples of protecting both flexible and rigid polyurethane foams with these types of compositions.…”

Section: Phosphorus Polyolsmentioning

confidence: 99%

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Reactive Flame Retardants for Polyurethane Foams

Papa¹

1970

Product R&D

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This article presents an up-to-date review of chemical compositions, particularly those bearing the elements of halogen and phosphorus, and structural features of flame retardants which have been chemically incorporated in polyurethane foams. Particular Anthony J. Papa is project scientist with the Chemicals and Plastics Division, Union Carbide Corp., South Charleston, W. Va. He received his Pk.D. degree from Washington State University in 1960, and did postdoctoral work at Purdue University in 1961 and exploratory research on polyurethanes as leather substitutes at Du Pont from 1962 to 1966. He has had experience in the areas of urethane, isocyanurate, and phenolic foams, and since 1966 has worked in the fields of rigid and flexible foams.directed toward the construction marketplace, but at the present time the biggest outlet for flame-retardant rigid polyurethanes is still as insulation for the transportation industry. Test MethodsA review of all flammability test methods applicable to polyurethane foams is beyond the intent of this article. The most commonly employed small and medium scale tests for rigid foams include the ASTM D 1692 test, the Butler chimney test, the Bureau of Mines flame penetration test, the ASTM E 162 radiant panel test, and the ASTM D 568 vertical bar test. The ASTM E 84

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Section: Commercial Flame Retardants For Polyurethane Foamsmentioning

confidence: 99%

Section: Phosphorus Polyolsmentioning

confidence: 99%

Reactive Flame Retardants for Polyurethane Foams

Papa¹

1970

Product R&D

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“…The use of an isocyanate containing a high degree of aromaticity, as found in the polymeric polyisocyanates Mondur® MR and PAPI<3', has also proven very effective in improving the flame retardancy properties of rigid foam by increasing the amount of char formed (25,30).…”

Section: Resultsmentioning

confidence: 99%