Integrally molded article of silicone rubber and modified polypropylene resin

A polypropylene resin/silicone rubber molded article comprising 1) a preform of a polypropylene resin having an aliphatic unsaturated bond or a composition comprising said polypropylene resin, and 2) an addition cured silicone rubber comprising a component (I) or (II),

• said component (I) being a compound containing in a molecule at least one hydrogen atom directly attached to a silicon atom and at least one member selected from the group consisting of an alkoxysilyl group, glycidyl group and acid anhydride group, and
• said component (II) being a compound containing in a molecule at least one hydrogen atom directly attached to a silicon atom and a divalent linkage --(CR.sup.1 R.sup.2).sub.n -- wherein each of R.sup.1 and R.sup.2 is a hydrogen atom or a monovalent hydrocarbon group having 1 to 10 carbon atoms and letter n is an integer of from 2 to 30,
• wherein said preform is bonded to said silicone rubber, and said polypropylene resin is selected from the group consisting of
• a random copolymer of propylene and at least one non-conjugated diene compound of the following formula ##STR10## wherein R.sub.1 to R.sub.4 are independently a hydrogen atom or alkyl group having 1 to 6 carbon atoms, and R.sub.1 and R.sub.2 are not both methyl groups when R.sub.3 is a hydrogen atom, and n is an integer from 1 to 20;
• a graft copolymer of polypropylene and at least one non-conjugated diene compound selected from the group consisting of 2-methyl-1,4-pentadiene, 1,4-hexadiene, 4-methyl-1,4-hexadiene, 4-methyl-1,4-heptadiene, 4-ethyl-1,4-heptadiene, 1,5-heptadiene, 1,5-octadiene, 5-methyl-1,5-heptadiene, 2-methyl-1,5-hexadiene, 1,6-octadiene, 6-methyl-1,6-octadiene, 2-methyl-1,6-heptadiene, 1,9-decadiene and 1,13-tetradecadiene;
• and
• a modified polypropylene that is obtained by 1) block copolymerizing a first monomer having an unsaturated bond and a first functional group with propylene or grafting said first monomer to polypropylene via radical polymerization, and 2) reacting the resultant block copolymer or graft copolymer with a second compound having an unsaturated bond and a second functional group that is capable of reacting with said first functional group.

A polypropylene resin/silicone rubber molded article comprising 1) a preform of a polypropylene resin having an aliphatic unsaturated bond or a composition comprising said polypropylene resin, and 2) an addition cured silicone rubber comprising a component (I) or (II),

• said component (I) being a compound containing in a molecule at least one hydrogen atom directly attached to a silicon atom and at least one member selected from the group consisting of an alkoxysilyl group, glycidyl group and acid anhydride group, and
• said component (II) being a compound containing in a molecule at least one hydrogen atom directly attached to a silicon atom and a divalent linkage --(CR.sup.1 R.sup.2).sub.n -- wherein each of R.sup.1 and R.sup.2 is a hydrogen atom or a monovalent hydrocarbon group having 1 to 10 carbon atoms and letter n is an integer of from 2 to 30,
• wherein said preform is bonded to said silicone rubber, and said polypropylene resin is selected from the group consisting of
• a random copolymer of propylene and at least one non-conjugated diene compound selected from the group consisting of 2-methyl-1,4-pentadiene, 1,4-hexadiene, 4-methyl-1,4-hexadiene, 1,4-heptadiene, 4-methyl-1,4-heptadiene, 4-ethyl-1,4-heptadiene, 1,5-heptadiene, 1,5-octadiene, 5-methyl-1,5-heptadiene, 2-methyl-1,5-hexadiene, 1,6-octadiene, 6-methyl-1,6-octadiene, 2-methyl-1,6-heptadiene, 1,9-decadiene and 1,13-tetradecadiene;
• a graft copolymer of polypropylene and at least one non-conjugated diene compound of the following formula ##STR13## wherein R.sub.1 to R.sub.4 are independently a hydrogen atom or alkyl group having 1 to 6 carbon atoms, and m is an integer from 1 to 20;
• and
• a modified polypropylene that is obtained by 1) block copolymerizing a first monomer having an unsaturated bond and a first functional group with propylene or grafting said first monomer to polypropylene via radical polymerization, and 2) reacting the resultant block copolymer or graft copolymer with a second compound having an unsaturated bond and a second functional group that is capable of reacting with said first functional group.

A polypropylene resin/silicone rubber molded article comprising 1) a preform of a polypropylene resin having an aliphatic unsaturated bond or a composition comprising said polypropylene resin, and 2) an addition cured silicone rubber, wherein said preform is bonded to said silicone rubber, and said polypropylene resin is selected from the group consisting of

• a random copolymer of propylene and at least one non-conjugated diene compound of the following formula ##STR14## wherein R.sub.1 to R.sub.4 are independently a hydrogen atom or alkyl group having 1 to 6 carbon atoms, and R.sub.1 and R.sub.2 are not both methyl groups when R.sub.3 is a hydrogen atom, and n is an integer from 1 to 20;
• a graft copolymer of polypropylene and at least one non-conjugated diene compound selected from the group consisting of 2-methyl-1,4-pentadiene, 1,4-hexadiene, 4-methyl-1,4-hexadiene, 4-methyl-1,4-heptadiene, 4-ethyl-1,4-heptadiene, 1,5-heptadiene, 1,5-octadiene, 5-methyl-1,5-heptadiene, 2-methyl-1,5-hexadiene, 1,6-octadiene, 6-methyl-1,6-octadiene, 2-methyl-1,6-heptadiene, 1,9-decadiene and 1,13-tetradecadiene;
• and
• a modified polypropylene that is obtained by 1) block copolymerizing a first monomer having an unsaturated bond and a first functional group with propylene or grafting said first monomer to polypropylene via radical polymerization, and 2) reacting the resultant block copolymer or graft copolymer with a second compound having an unsaturated bond and a second functional group that is capable of reacting with said first functional group.