Patent GB-1009010-A (GB)
Title: Stabilised paraffin wax-polyolefin blends
IPC: C08L91/08
Filed: 1964-07-08
Abstract: Paraffin wax-polyolefin blends comprising 95% to 5% by weight of a paraffin wax and from 5% to 95% by weight of a polyolefin are stabilized by the incorporation therein of from 0.05 to 1 part by weight per 100 parts of the polyolefin of a phenol of the formula: <FORM:1009010/C4-C5/1> in which Y represents an alkyl group of from 1 to 20 carbon atoms, a cyclo alkyl group of from 6 to 20 carbon atoms or a hydrogen atom, Z represents an alkyl group of from 1 to 20 carbon atoms, a cycloalkyl group of from 6 to 20 carbon atoms, an alkyl hydroxy aralkyl group of from 8 to 40 carbon atoms, or a hydrogen atom, and R1, R2, R3, R4 and R5, which may be the same or different, each represents an alkyl or alkoxy group of from 1 to 40 carbon atoms, a cyclo alkyl, aryloxy, aryl, aralkyl, or alkaryl radical of from 6 to 40 carbon atoms, a hydrogen atom or a hydroxy group with the proviso that only one of R1, R2, R3, R4 and R5 represents a hydroxy group, and from 0.05 to 1 part by weight per 100 parts of the polyolefin of a phosphite of the formula: <FORM:1009010/C4-C5/2> in which R6, R7 and R8 may be the same or different and each represents an alkyl group of from 4 to 12 carbon atoms, a phenyl group, or an alkyl phenyl group in which the alkyl moiety contains from 4 to 12 carbon atoms.  Phenols exemplified are 1,1,3-tris-(2-methyl-4-hydroxy-5-t.-butyl phenyl) butane and 2,21-dihydroxy-3,31 - di - (2 - methylcyclohexyl) - 4,41 - dimethyl diphenylmethane. Phosphites exemplified are tris-(nonylphenyl) phosphite and 2-ethylhexyl diphenyl phosphite.  Paraffin waxes having softening points of from 48 DEG  to 65 DEG  C. may be used. Preferred polyolefins are low molecular weight polyethylenes and polybutene-1 with a high isotactic content prepared direct or by degradation of a higher molecular weight polybutene-1. Where the polyolefin has a high ash content, certain metal soaps (listed) may be added as stabilizers.ALSO:Paraffin wax-polyolefin blends comprising 95% to 5% by weight of a paraffin wax and from 5% to 95% by weight of a polyolefin are stabilized by the incorporation therein of from 0.05 to 1 part by weight per 100 parts of the polyolefin of a phenol of the formula:  <FORM:1009010/C3/1> in which Y represents an alkyl group of from 1 to 20 carbon atoms, a cyclo alkyl group of from 6 to 20 carbon atoms or a hydrogen atom, Z represents an alkyl group of from 1 to 20 carbon atoms, a cycloalkyl group of from 6 to 20 carbon atoms, an alkyl hydroxy aralkyl group of from 8 to 40 carbon atoms, or a hydrogen atom, and R1, R2, R3, R4 and R5, which may be the same or different, each represents an alkyl or alkoxy group of from 1 to 40 carbon atoms, a cyclo alkyl, aryloxy, aryl, aralkyl, or alkaryl radical of from 6 to 40 carbon atoms, a hydrogen atom or a hydroxy group with the proviso that only one of R1, R2, R3, R4 and R5 represents a hydroxy group, and from 0.05 to 1 part by weight per 100 parts of the polyolefin of a phosphite of the formula: <FORM:1009010/C3/2> in which R6, R7 and R8 may be the same or different and each represents an alkyl group of from 4 to 12 carbon atoms, a phenyl group, or an alkyl phenyl group in which the alkyl moiety contains from 4 to 12 carbon atoms.  Phenols exemplified are 1,1,3-tris-(2-methyl-4-hydroxy-5-t.-butylphenyl) butane and 2,21-dihydroxy-3,31-di-(2-methylcyclohexyl) -4,41-dimethyl di-phenylmethane. Phosphites exemplified are tris-(nonylphenyl) phosphite and 2-ethylhexyl diphenyl phosphite. Paraffin waxes having softening points of from 48 DEG  C. to 65 DEG  C. may be used. Preferred polyolefins are low molecular weight polyethylenes and polybutene-1 with a high isotactic content prepared direct or by degradation of a higher molecular weight polybutene-1. Where the polyolefin has a high ash content, certain metal soaps (listed) may be added as stabilizers.