The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 2002
Filed:
Mar. 10, 1999
Applicant:
Inventor:
Eman Alsaffar, Bury St. Edmunds, GB;
Assignee:
LRC Products Limited, Broxbourne, GB;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A41D 1/9015 ; A61F 6/04 ; B29D 2/204 ; B29D 3/100 ;
U.S. Cl.
CPC ...
A41D 1/9015 ; A61F 6/04 ; B29D 2/204 ; B29D 3/100 ;
Abstract
Soft, thin-walled elastic articles such as condoms and gloves are made of films of a linear polyurethane which has been so made as to have physical properties close to those of a similar film of natural rubber. The polyurethane is made from poly(propylene glycol) polyols with no more than 0.01 milliequivalents unsaturation per gram, and has a molecular weight Mn of 90 to 150 kg/mol, a ratio Mw:Mn of 1.2 to 2.2, and a ratio of hard:soft segments of 20:80 to 40:60. The film has an S100 of less than 2.0 MPa, an elongation at break of at least 800%, and a tensile strength of above 15 MPa.