Rotocasting process for producing rubbery reinforced articles

Details Rotocasting process for producing rubbery reinforced articles Rotocasting process for producing rubbery reinforced articles

1979-12-03

1981-03-31

Derrington, James H.

Amusement devices: games

Aerial projectile game; game element or accessory therefor...

Target

291571R, 264257, 264258, 264310, 264311, 273 58BA, 273 58J, 428 35, A63B 4100, B28C 504

Patent

active

042589177

ABSTRACT:
A process is provided for making reinforced rubbery sport and play balls by rotational casting, in a mold lined with a nonwoven fabric, a liquid polymer composition containing an epoxy resin, a liquid carboxyl-terminated polymer, an amine, a dihydric compound, and a plasticizer. The sections of nonwoven fabric in the mold are preshrunk and sealed together by means of an amine-terminated liquid polymer. The resultant sport and play balls have good dimensional stability and the desired flex and tear properties.

REFERENCES:
patent: 3095261 (1963-06-01), Meyer
patent: 3607500 (1971-09-01), Field
patent: 4119592 (1978-10-01), Murphy
patent: 4154789 (1979-05-01), Delacoste
patent: 4169594 (1979-10-01), Crane
patent: 4183883 (1980-01-01), Blair
patent: 4187134 (1980-02-01), Svub

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