Shock-absorbing polyurethane foam and production process thereof

Details Shock-absorbing polyurethane foam and production process thereof Shock-absorbing polyurethane foam and production process thereof

1989-06-05

1991-01-22

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521107, 521123, 521129, 521130, C08G 1814

Patent

active

049871560

ABSTRACT:
A shock-absorbing polyurethane foam is formed of a polyol component and a polyisocyanate component. The polyol component is a mixed polyol having an average hydroxyl number of 130-250 and composed at least of 20-70 parts by weight of a low-molecular polyol having a molecular weight of 300-500 and 80-30 parts by weight of a high-molecular polyol having a molecular weight of 1,500-8,000 per 100 parts by weight of the whole polyol component. The foam further contains 5-150 parts by weight of a plasticizer having a solidification point not higher than -20.degree. C. per 100 parts by weight of the whole polyol component. The foam can be produced by reacting the polyol component and polyisocyanate component in the presence of 5-150 parts by weight of the plasticizer per 100 parts by weight of the polyol component.

REFERENCES:
patent: 4565833 (1986-01-01), Buszard et al.
patent: 4746682 (1988-05-01), Green

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