Polymer coating for rubber articles
OwnerApala Mukherjee, Chaodong Xiaoinventors
Life of this patent
Estimating the term…
Abstract
The present invention is directed to the use of a polymer coating composition microbeads and a high Tg polymer with a Tg of greater than −10° C. for the inner coating on natural and synthetic rubber articles, particularly for latex gloves. The coating composition provides an inner surface coating that reduces friction between the latex and the hand to allow convenient donning. The coating composition is deliverable from an aqueous solution.
Claims16
An article comprising a formed natural or synthetic rubber article having directly deposited thereon a continuous coating of an aqueous-based coating composition comprising:
- a) 0.1 to 10 percent by weight of a high Tg polymer, having a Tg of from −10° C. to +120° C.;
- and
- b) 0.01 to 1 percent by weight of microbeads, said microbeads having an oil adsorption of less than 150 g/10 g powder.
A method of making a glove comprising:
- a) dipping a former into a liquid comprising a coagulant, removing the former from the coagulant and drying it to form a layer of coagulant on the former;
- b) dipping the former into rubber latex and drying it to form a partially-cured rubber deposit on the former;
- c) dipping the deposit of rubber into a dispersion comprising microbeads, and a high Tg polymer, and drying it to form a continuous polymer coating on the rubber deposit;
- d) vulcanizing the deposit of rubber with the polymer coating in an oven at about 100° C. until the rubber is vulcanized to the desired degree and the layers are bonded to the rubber;
- and
- c) cooling and then removing a finished glove from the said former.
A method of making a glove comprising:
- a) dipping a former into a liquid comprising a coagulant, removing the former from the coagulant and drying it to form a layer of coagulant on the former;
- b) dipping the former into rubber latex and drying it to form a partially-cured rubber deposit on the former;
- c) vulcanizing the deposit of in an oven at about 100° C. until the rubber is vulcanized to the desired degree and the layers are bonded to the rubber;
- d) dipping the deposit of rubber into a dispersion comprising microbeads, and a high Tg polymer, and drying it to form a continuous polymer coating on the rubber deposit;
- and
- d) cooling and then removing a finished glove from the said former.
Dependencies are inferred from the claim text.