Polyolefin resin composition
AssigneesMitsubishi Gas Chemical Company, Inc., Dainichiseika Color & Chemicals Mfg. Co., Ltd.
InventorsMorio Gaku, Hidenori Kimbara, Akira Yahagi, Takaaki Osanai
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Abstract
A stabilized polyolefin resin composition in which (a) 0.005-5% by weight of at least one monofunctional or polyfunctional cyanate ester compound having at least one cyanato group in its molecule, (b) 0.01-5% by weight of at least one hindered amine ultraviolet absorber and (c) 0.005-2% by weight of at least one hindered phenolic antioxidant are incorporated into a polyolefin resin is disclosed. The resin composition has excellent heat stability and resistance to weathering.
Claims11
A stabilized polyolefin resin composition comprising a polyolefin resin having incorporated therein
- (a) 0.005-5% by weight of at least one monofunctional or polyfunctional cyanate ester represented by the formula (1) or (2):
- ##STR4## wherein R and R', which may be the same or different, represents hydrogen, halogen, linear or branched C.sub.1 -C.sub.9 alkyl;
- A is a C.sub.1 -C.sub.9 alkylene group;
- a is a number from 0 to 5 wherein e=1 and a number from 2 to 5 where e=0;
- b=5-a where e=1 and 6-(a+d) where e=0;
- c=5-d;
- d is a number from 0 to 5;
- e is a number 0, 1, 2 or 3;
- with the proviso that the sum of (a+d) always gives a number from 2 to 5, ##STR5## wherein n is 0 or an integer of 1 or more;
- and R"s may be the same or different, and each R" is hydrogen or methyl;
- and wherein of formula (2) there contains 50% by weight or more in total of cyanate esters in which n is an integer of 1 to 3,
- (b) 0.01-5% by weight of at least one hindered amine ultraviolet absorber and
- (c) 0.005-2% by weight of at least one hindered phenolic antioxidant.
A stabilized olefin resin composition comprising a polyolefin resin having incorporated therein
- (a) 0.005-5% by weight of at least one monofunctional or polyfunctional cyanate ester selected from the group consisting of monocyanato benzene and p-tert.butyl cyanato benzene;
- monocyanato naphthalene;
- ,1,3- or 1,4-dicyanato benzene;
- 1,3,5-tricyanatobenzene;
- 1,3-, 1,4-, 1,6-, 1,8-, 2,6,- or 2,7-dicyanato nephthalene;
- 1,3,6-tricyanato naphthalene;
- 4,4'-dicyanato biphenyl;
- bis(4-dicyanatophenyl) methane;
- 2,2-bis(4-cyanatophenyl) propane;
- 2,2-bis(3,5-dichloro-4-cyanatophenyl) propane;
- 2,2-bis(3,5-dibromo-4-cyanatophenyl) propane;
- bis(4-cyanatophenyl) ether;
- bis(4-cyanatophenyl) thioether;
- bis(4-cyanatophenyl) sulfone;
- tris(4-cyanatophenyl) phosphate and cyanate esters obtained by reacting a hydroxy-terminated polycarbonate oligomer with a cyanogen halide and cyanate esters obtained by reacting novolak with a cyanogen halide;
- (b) 0.01-5% by weight of at least one hindered amine ultraviolet absorber;
- and
- (c) 0.005-2% by weight of at least one hindered phenolic antioxidant.
Dependencies are inferred from the claim text.