Rubber compounding bags and film made from syndiotactic 1,2-polybutadiene

A compounded rubber comprised of a mixture of an unvulcanized rubber and a package comprising at least one compounding ingredient for unvulcanized rubber packaged in a bag or film made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, the thickness of said bag or film being in the range of about 0.5 to about 10 mils.

A packaged unvulcanized rubber which comprises said unvulcanized rubber substantially encompassed with a wrap or bag of a protective film having a thickness in the range of about 0.5 to about 10 mils, said film being made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof.

A method of compounding rubber which comprises mixing unvulcanized rubber with a package comprising at least one compounding ingredient for unvulcanized rubber packaged in a coextruded bag or film made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, the total thickness of said bag or film being in the range of about 0.5 to about 10 mils, said coextruded bag or film comprising at least an inside layer and an outside layer, said inside layer being comprised of syndiotactic 1,2-polybutadiene containing a greater amount of one or more of said antiblock agents than the outside layer.

A package which comprises (A) an article selected from at least one of unvulcanized or vulcanized rubber or compounding ingredients for unvulcanized rubber packaged in (B) a coextruded bag or film made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, the total thickness of said bag or film being in the range of about 0.5 to about 10 mils, said coextruded bag or film comprising at least an inside layer and an outside layer, said inside layer being comprised of syndiotactic 1,2-polybutadiene containing a greater amount of one or more of said antiblock agents than the outside layer.

A compounded rubber comprised of a mixture of an unvulcanized rubber and a package comprising at least one compounding ingredient for unvulcanized rubber packaged in a coextruded bag or film made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, the total thickness of said bag or film being in the range of about 0.5 to about 10 mils, said coextruded bag or film comprising at least an inside layer and an outside layer, said inside layer being comprised of syndiotactic 1,2-polybutadiene containing a greater amount of one or more of said antiblock agents than the outside layer.

A packaged unvulcanized rubber which comprises said unvulcanized rubber substantially encompassed with a wrap or bag of a protective film having a thickness in the range of about 0.5 to about 10 mils, said film being made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, said coextruded bag or film comprising at least an inside layer and an outside layer, said inside layer being comprised of syndiotactic 1,2-polybutadiene containing a greater amount of one or more of said antiblock agents than the outside layer.

A method of compounding rubber which comprises mixing unvulcanized rubber with a package comprising at least one compounding ingredient for unvulcanized rubber packaged in a bag or film made of syndiotactic 1,2-polybutadiene containing at least one antiblock agent additive and also containing at least one slip agent additive selected from the group consisting of fatty acids and metal salts thereof, fatty acid amides, and ester waxes and partially saponified products thereof, the thickness of said bag or film being in the range of about 0.5 to about 10 mils.