Moreover, the fracture surfaces of poly(benzoxazine-co-urethane
)s with different weight percent of urethane
did not display any phase separation, indicating that a homogeneous structure was formed in poly(benzoxazine-co-urethane
Designers and engineers often begin with cast urethanes
because the intent of mass production may not yet be confirmed, the low volume may not justify hard tooling, or there is a tight timeline to get a product to market.
The final properties of a given urethane
system will depend on the stoichiometry ratio used.
The cores did not show the core stain usually associated with conventional urethane
Complete production lines and components for urethane
and phenolic foams include continuous foam slab, bun, and log systems of 2-96 in.
First, the adhesive compound is applied to the metal and cured to create a bond; then the urethane
element is cast in place and bonds to the adhesive as it cures.
Until all scientific research is completed and evaluated, and regulations established, FDA is working with industry to reduce any potential risk to humans from urethane
and is participating in tests to find out if the small amounts of urethane
present in alcoholic beverages might be harmful.
Unlike some of the chemical controversies of the past, such as DDT and saccharine, there is no disputing the fact that urethane
is a carcinogen,' says Michael Jacobson, the group's executive director.
The mill can also be used to integrate company logos into molds and to refine molded urethane
products such as hydrocyclones and roller casings, ensuring that finished parts meet strict tolerances.
Information is available from this manufacturer of custom urethane
processing systems and precision fluid flow measurement systems.
New England Urethane
(NEU) of North Haven, Connecticut, USA, has introduced a proprietary nonplasticized urethane
blend for a range of medical, consumer, and industrial-products applications, including those requiring films.