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METHODS FOR FORMULATING POLYISOCYANURATE FOAM-FORMING COMPOSITIONS, RELATED POLYISOCYANURATE FOAM-FORMING COMPOSITIONS, AND FOAMS PRODUCED THEREBY
METHODS FOR FORMULATING POLYISOCYANURATE FOAM-FORMING COMPOSITIONS, RELATED POLYISOCYANURATE FOAM-FORMING COMPOSITIONS, AND FOAMS PRODUCED THEREBY
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机译:配制多异氰酸酯泡沫形成组合物的方法,相关的多异氰酸酯泡沫形成组合物以及由此产生的泡沫
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摘要
Disclosed are methods for formulating a polyisocyanurate foam-forming composition with good low temperature insulation performance. The polyisocyanurate foam-forming composition includes: a) an organic polyisocyanate, b) a polyol composition comprising at least one polyester polyol with a nominal hydroxyl functionality of at least 2.0, c) a blowing agent composition present in an amount sufficient to produce foam having a density of less than 1.85 lb/ft3 and comprising: (1) a hydrocarbon having an atmospheric pressure boiling point of at least 68°F (20°C), and (2) water, d) a trimerization catalyst, e) a flame retardant, and f) a silicone surface-active agent. The methods include: (A) evaluating a measured Relative Hydrocarbon Solubility and, optionally, evaluating a measured a Surfactant Water Solubility, a Surfactant Turbidity, or evaluating both the Surfactant Water Solubility and the Surfactant Turbidity; and (B) formulating the polyisocyanurate foam-forming composition with the silicone surface-active agent in light of such evaluation.
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