Process for encapsulating objects and for forming flexible molds

Details Process for encapsulating objects and for forming flexible molds Process for encapsulating objects and for forming flexible molds

1975-09-23

1978-08-01

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

With step of making mold or mold shaping, per se

Utilizing surface to be reproduced as an impression pattern

264279, 264337, 427388A, 427435, B29C 102, B29C 602

Patent

active

041043502

ABSTRACT:
Mercaptoalkanoic acids and thiodialkanoic acids are reacted with a poly(oxyalkylene)-polyol to form poly(oxyalkylene)-polyester-poly(monosulfide)-polythiols which are useful as encapsulating materials and mold compositions when oxidatively coupled or cured. In one embodiment, a polymeric reaction product, either in the uncured state or partially cured state, is used for the preparation of flexible molds from which regularly or irregularly shaped objects can be made.

REFERENCES:
patent: 2246332 (1941-06-01), Whiteley, Jr.
patent: 2772186 (1956-11-01), Mollers et al.
patent: 2875182 (1959-02-01), Fettes et al.
patent: 3653959 (1972-04-01), Kehr et al.
patent: 3817936 (1974-06-01), Jones et al.
patent: 3856908 (1974-12-01), Harper
"Flexible Urethane Molds for the Furniture Industry," G. T. Morse, SPE Journal, Jun. 1969, vol. 25.

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