Low-resilience polyurethane foam and production method thereof
AssigneeMitsui Chemicals, Inc.
InventorsDaisuke Nishiguchi, Masakazu Kageoka, Toshiaki Moriya, Satoshi Yamasaki
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Abstract
A low-resilience polyurethane foam is produced by allowing a low-resilience polyurethane foam composition containing polyisocyanate (a), polyol (b), catalyst (c), and blowing agent (d) to react. The polyisocyanate (a) contains bis(isocyanatomethyl)cyclohexane, and the polyol (b) contains 5 to 30 mass % of polyol (b-1) having an average functionality of 1.5 to 4.5 and a hydroxyl number of 20 to 70 mgKOH/g, and 70 to 95 mass % of polyol (b-2) having an average functionality of 1.5 to 4.5 and a hydroxyl number of 140 to 300 mgKOH/g.
Claims5
A low-resilience polyurethane foam produced by allowing a low-resilience polyurethane foam composition containing polyisocyanate (a), polyol (b), catalyst (c), blowing agent (d) and cross-linking agent (e) to react,
- wherein the polyisocyanate (a) comprises bis(isocyanatomethyl)cyclohexane, and the polyol (b) comprises,
- 5 to 30 mass % of polyoxypropylenepolyol (b-1) having an average functionality of 1.5 to 4.5 and a hydroxyl number of 20 to 70 mgKOH/g, and
- 70 to 95 mass % of polyol (b-2) having an average functionality of 1.5 to 4.5 and a hydroxyl number of 140 to 300 mgKOH/g,
- the bis(isocyanatomethyl)cyclohexane contains
- cis-1,4-bis(isocyanatomethyl)cyclohexane and
- trans-1,4-bis(isocyanatomethyl)cyclohexane,
- the bis(isocyanatomethyl)cyclohexane contains 80 mol % or more and 93 mol % or less of trans-1,4-bis(isocyanatomethyl)cyclohexane, and
- an impact resilience determined in conformity with JIS K 6400 (2004) is 14% or less.
A method for producing a low-resilience polyurethane foam, the method comprising:
- allowing a low-resilience polyurethane foam composition containing polyisocyanate (a), polyol (b), catalyst (c), blowing agent (d) and cross-linking agent (e) to react and foam, thereby producing a low-resilience polyurethane foam,
- wherein the polyisocyanate (a) comprises bis(isocyanatomethyl)cyclohexane, and
- the polyol (b) comprises,
- 5 to 30 mass % of polyoxypropylenepolyol (b-1) having an average functionality of 1.5 to 4.5 and a hydroxyl number of 20 to 70 mgKOH/g, and
- 70 to 95 mass % of polyol (b-2) having an average functionality of 1.5 to 4.5 and a hydroxyl number of 140 to 300 mgKOH/g,
- the bis(isocyanatomethyl)cyclohexane contains 80 mol % or more and 93 mol % or less of trans-1,4-bis(isocyanatomethyl)cyclohexane, and
- an impact resilience determined in conformity with JIS K 6400 (2004) is 14% or less.
Dependencies are inferred from the claim text.