Pulverulent mixtures containing low-emission nitrile rubbers

A pulverulent mixture comprising:

• (1) at least one nitrile rubber which has repeating units of at least one α,β-unsaturated nitrite monomer and at least one conjugated diene monomer and has an emission ratio E according to the formula (I) of less than or equal to
• E
• =
• [
• volatile
• ⁢
• ⁢
• constituents
• ]
• [
• Mooney
• ⁢
• ⁢
• viscosity
• ]
• ×
• [
• Nitrile
• ⁢
• ⁢
• content
• ]
• 100
• (
• I
• )
• 0.25 mg/(kg*Mooney units),
• where
• [volatile constituents] is the concentration of volatile constituents in mg/kg of nitrite rubber determined by means of a TDS-GC/MS examination in accordance with the VDA 278 recommendation (09.2002 version) in the range from 28.4 minutes to 34.0 minutes,
• [Mooney viscosity] is the Mooney viscosity ML 1+4 at 100° C. of the nitrite rubber determined in accordance with ASTM D 1646 and reported in Mooney units, and
• [nitrite content] is the dimensionless content of the α,β-unsaturated nitrite in the nitrite rubber, determined in % by weight by the Kjeldahl method in accordance with DIN 53 625, and
• (0) one or more release agents,
• wherein particles of the pulverulent mixture have an average particle diameter Da of 0.01 to 4 mm.