公开(公告)号：US11332569B2

公开(公告)日：2022-05-17

申请号：US16489478

申请日：2018-03-02

Applicant: Dow Global Technologies LLC ,  Dow Italia Divisione Commerciale S.R.L.

Inventor： Silvia Scussolin ,  Luciano Zanacchi ,  Alessio Sabadini

IPC: C08G18/12 ,  C08G18/08 ,  C08G18/32 ,  C08G18/48 ,  C08G18/76 ,  C08G18/79

Abstract: The present disclosure provides for a polyurethane elastomer foam formed by reacting a mixture that includes 60 to 50 weight percent (wt. %) of a polyol formulation and 40 to 50 wt. % isocyanate pre-polymer (wt. % based on the total weight of the mixture). The polyol formulation includes 85 to 92 wt. % of a polytetramethylene ether glycol (PTMEG) with a weight average molecular weight of 1900 to 2100 and a hydroxyl number of about 53 to about 60; 4 to 10 wt. % of monoethylene glycol; a blowing agent; a catalyst; and a surfactant (wt. % values for the polyol formulation based on the total weight of the polyol formulation). The isocyanate pre-polymer includes 55 to 70 wt. % of a isocyanate blend having at least 90 wt. % of 4,4′-diphenylmethane diisocyanate; and 30 to 45 wt. % of the PTMEG, where the isocyanate pre-polymer has an isocyanate content of 16 to 21 wt. % based on the total weight of the isocyanate pre-polymer, and the polyurethane elastomer foam has a ball rebound of at least 50% measured according to ASTM D3574 on a 10 mm thickness test plate.

公开(公告)号：US20200071448A1

公开(公告)日：2020-03-05

申请号：US16489478

申请日：2018-03-02

Applicant: Dow Global Technologies LLC ,  Dow Italia Divisione Commerciale S.R.L.

Inventor： Silvia Scussolin ,  Luciano Zanacchi ,  Alessio Sabadini

IPC: C08G18/12 ,  C08G18/08 ,  C08G18/32 ,  C08G18/48 ,  C08G18/76 ,  C08G18/79

Abstract: The present disclosure provides for a polyurethane elastomer foam formed by reacting a mixture that includes 60 to 50 weight percent (wt. %) of a polyol formulation and 40 to 50 wt. % isocyanate pre-polymer (wt. % based on the total weight of the mixture). The polyol formulation includes 85 to 92 wt. % of a polytetramethylene ether glycol (PTMEG) with a weight average molecular weight of 1900 to 2100 and a hydroxyl number of about 53 to about 60; 4 to 10 wt. % of monoethylene glycol; a blowing agent; a catalyst; and a surfactant (wt. % values for the polyol formulation based on the total weight of the polyol formulation). The isocyanate pre-polymer includes 55 to 70 wt. % of a isocyanate blend having at least 90 wt. % of 4,4′-diphenylmethane diisocyanate; and 30 to 45 wt. % of the PTMEG, where the isocyanate pre-polymer has an isocyanate content of 16 to 21 wt. % based on the total weight of the isocyanate pre-polymer, and the polyurethane elastomer foam has a ball rebound of at least 50% measured according to ASTM D3574 on a 10 mm thickness test plate.