Plasticized polydicyclopentadiene and a method for making the sa

Details Plasticized polydicyclopentadiene and a method for making the sa Plasticized polydicyclopentadiene and a method for making the sa

1982-05-14

1984-03-13

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524297, 524776, 526142, 526154, 526166, 526169, C08K 512

Patent

active

044368585

ABSTRACT:
Incorporation of an ester plasticizer having a solubility parameter from about 7.8 to about 10.2 (cal/cc).sup.1/2 increases the flexibility and impact strength of poly(dicyclopentadiene). In a preferred embodiment of the method for poly(dicyclopentadiene) synthesis, the plasticizer is incorporated into at least one or two parts of a metathesis-catalyst system: a catalyst/monomer solution or an activator/monomer solution. The two parts are then combined in the mixing head of a reaction injection molding machine and injected into a mold where the reaction mixture rapidly sets up into a thermoset polymer with greater flexibility and impact strength than is found in the corresponding unplasticized poly(dicyclopentadiene).

REFERENCES:
patent: 2674586 (1954-04-01), Welch
patent: 3575947 (1971-04-01), Crain
patent: 3624060 (1971-11-01), Judy
patent: 3639371 (1972-02-01), Marshall et al.
patent: 3776895 (1973-12-01), Ven et al.
patent: 3816384 (1974-06-01), Streck et al.
patent: 4025708 (1977-05-01), Minchak et al.
The "Technology of Plasticizers" by Sears et al., pp. 1008, 1034, 1037, 1044.

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