Aqueous outside release agent comprising diatomaceous earth and

Details Aqueous outside release agent comprising diatomaceous earth and Aqueous outside release agent comprising diatomaceous earth and

1994-01-14

1995-11-14

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524389, 524442, 524496, 524493, 524318, 524 25, 524 31, 524 35, 106124, 106146, 106148, 106161, 106203, 106204, C08J 510, C08K 334, C08L 2514

Patent

active

054667429

ABSTRACT:
An aqueous outside release agent for the production of tires and other rubber articles is described, which contains 5 to 35% by wt. diatomaceous earth, 0.5 to 6% by wt. pyrogenic hydrophobic silica, 0.1 to 2% by wt. nonionic surfactant, 0.2 to 3% by wt. of a binder, 0.1 to 3% by wt. dye, 0 to 5% by wt. ethyl alcohol and the remainder water. Preferred binders are styrene-maleic acid or styrene-maleic anhydride copolymers and in particular ammonium salts thereof. Said outside release agent is used in processes for molding and vulcanizing tires and other rubber articles, it being sprayed onto the blank with the aid of air-atomizing guns before molding and vulcanization are carried out. A very good release effect is thereby achieved without vulcanization being impaired. As only very small quantities of outside release agent are needed, cleaning of the press mold and hence interruption of the production process are required very much less frequently than when conventional outside release agents are used.

REFERENCES:
patent: 4325852 (1982-04-01), Hallenbeck
patent: 4329265 (1992-05-01), Hallenbeck et al.
patent: 4666518 (1987-05-01), Hallenbeck et al.
patent: 5134170 (1992-07-01), Ohata et al.

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