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US 6,635,685 B2Granted
Rigid polyurethane foam and process for producing the same
AssigneeSamsung Electronics Co., Ltd.
InventorsSang Jo Suk, Bong Ku Kim, Sang Bu Jeon, Cheol Min Hur
Life of this patent
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Abstract
A process for producing a rigid polyurethane foam provides a rigid polyurethane foam having a closed-cell size of about 80-130 μm and thus, improved heat insulating properties.
Claims6
A process for producing a rigid polyurethane foam comprising:
- reacting a polyol component with a polyisocyanate component in a reaction medium containing a blowing agent, said polyol component comprising a polyether polyol, said polyether polyol comprising at least two polyols selected from the group consisting of toluenediamine-based polyols, methylenediphenyldiamine-based polyols and bisphenol-A-based polyols and having an average OH value of 200-650, in an amount of 40-70 parts by weight of 100 parts by weight of total polyols, and said blowing agent comprising a component selected from the group consisting of cyclopentane and hydrofluorocarbons.
A process for producing a rigid polyurethane foam comprising:
- reacting a polyol component with a polyisocynate component in a reaction medium containing a blowing agent, said polyol component comprising toluendiamine-based polyols and methylenediphenyldiamine-based polyol and having an average OH value of 200-650, in an amount of 40-70 parts by weight of 100 parts by weight of total polyols, and said blowing agent being cyclopentane or HFCS.
Dependencies are inferred from the claim text.