SPRAYABLE POLYURETHANE BASED PROTECTIVE COATING

摘要

A sprayable polyurethane based reaction system for forming a protective coating in industrial containers includes a first component and a second component, each having a viscosity less than 1500 cP at 25° C. A difference between the viscosities of the first component and the second component within a temperature range of 60° C. and 80° C. is from −150 cP to 150 cP. The first component is a reaction product of a polyol component that includes a first butylene oxide propylene oxide copolymer polyol having a polyoxybutylene content of at least 50 wt % and an isocyanate component that includes at least one polyisocyanate. The second component has a second butylene oxide propylene oxide copolymer polyol having a polyoxybutylene content of at least 50 wt %. At least one selected from a group of the polyol component and the second component includes a primary hydroxyl containing polyol.

主权项

1. A sprayable polyurethane based reaction system for forming a protective coating in industrial containers, the reaction system comprising:
a first component that is a reaction product of a polyol component and an isocyanate component, the polyol component including a first butylene oxide-propylene oxide copolymer polyol having a polyoxybutylene content of at least 50 wt % based on a total weight of the first butylene oxide-propylene oxide copolymer polyol, the isocyanate component including at least one polyisocyanate, and a viscosity of the first component being less than 1500 cP at 25° C.; and a second component that includes a second butylene oxide-propylene oxide copolymer polyol having a polyoxybutylene content of at least 50 wt %, based on a total weight of the second butylene oxide-propylene oxide copolymer polyol and a viscosity of the second component being less than 1500 cP at 25° C., and a difference between the viscosities of the first component and the second component within a temperature range of 60° C. and 80° C. being from −150 cP to 150 cP, wherein at least one selected from a group of the polyol component and the second component includes a primary hydroxyl containing polyol, and a reaction product of the first component and the second component has a tensile strength of at least 1500 psi and a percent elongation at break of at least 400.