enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Polyurethane urea elastomer - Wikipedia

   en.wikipedia.org/wiki/Polyurethane_urea_elastomer

   The polyurethane urea elastomer (PUU), or poly (urethane urea) elastomer, is a flexible polymeric material that is composed of linkages made out of polyurethane and polyurea compounds. Due to its hyperelastic properties, it is capable of bouncing back high-speed ballistic projectiles as if the material had “hardened” upon impact.

3. Polyurethane - Wikipedia

   en.wikipedia.org/wiki/Polyurethane

   The materials are used in elastomer, sealant, and adhesive applications that require superior weatherability, and resistance to chemical and environmental attack. Natural oil polyols derived from castor oil and other vegetable oils are used to make elastomers, flexible bunstock, and flexible molded foam.

4. List of polyurethane applications - Wikipedia

   en.wikipedia.org/wiki/List_of_polyurethane...

   Industrial Insulation. Rigid polyurethane foam is used in various industries to provide thermal insulation to installations and pipes. In particular, the piping for district heating systems in Europe is primarily insulated using a pre-insulated pipes sandwich assembly composed of a steel heat service pipe, an insulating layer (polyurethane foam) and a polyethylene (PE) casing, which are bonded ...

5. Polyurea - Wikipedia

   en.wikipedia.org/wiki/Polyurea

   Urea or carbamide is an organic compound with the chemical formula (NH 2) 2 CO. The molecule has two amine groups (–NH 2) joined by a carbonyl functional group (C=O). In a polyurea, alternating monomer units of isocyanates and amines react with each other to form urea linkages.

6. Category:Polyurethanes - Wikipedia

   en.wikipedia.org/wiki/Category:Polyurethanes

   Polyurethane urea elastomer; Prepolymer; R. Reticulated foam; S. Sorbothane; Spandex; Z. Zylon This page was last edited on 30 March 2013, at 02:05 (UTC). Text is ...

7. Silyl modified polymers - Wikipedia

   en.wikipedia.org/wiki/Silyl_modified_polymers

   The products cure from a liquid or gel state to a solid elastomer. Curing entails crosslinking by the hydrolysis of silyl ethers: 2 RSi(OCH 3) 2 R' + H 2 O → [RSi(OCH 3)R'] 2 O + 2 CH 3 OH. In a hydrolysis reaction, a catalyst and moisture is required to form an intermediate silanol, which then reacts to form siloxane linkages in a ...