Polymer compositions and products formed therewith
AssigneeChurch & Dwight Co., Inc.
InventorsMuthiah Thiyagarajan, Rajesh Ranjan, Carmen Guzman, Jon Toliver, Steven T. Adamy
Life of this patent
Estimating the term…
Abstract
The present disclosure provides compositions and products formed therefrom. In particular, the disclosure provides elastomeric latex articles, such as gloves and condoms, that can be prepared utilizing a styrene-polyisoprene-styrene (SIS) latex. The elastomeric articles can exhibit desired tensile properties while being substantially or completely free of undesired components, such as sulfur and zinc oxide, which can be allergens. The disclosure further provides methods of preparing elastomeric latex articles.
Claims14
A method for preparing an elastomeric article, the method comprising:
- preparing a compounded polymer latex composition including a polystyrene-polyisoprene-polystyrene (SIS) polymer latex;
- prevulcanizing the compounded polymer latex composition at a first temperature for a first time period and then at a second, lower temperature for a second time period effective so that the prevulcanized compounded polymer latex composition has a relaxed modulus of about 0.50 MPa to about 0.61 MPa, wherein the first temperature and the second temperature are separated by at least 4° C.;
- dipping a former into the prevulcanized compounded polymer latex composition to form at least one layer of the prevulcanized compounded polymer latex composition thereon;
- and
- curing the at least one layer of the prevulcanized compounded polymer latex composition on the former to provide the elastomeric article.
Dependencies are inferred from the claim text.