Back to results
US 4,394,307 AGranted
Track recording plastic compositions
OwnerGregory Tarleinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerGregory Tarleinventor
Estimating the term…
Improved nuclear track recording plastic compositions are provided which exhibit greatly decreased surface roughness when etched to produce visible tracks of energetic nuclear particles which have passed into and/or through said plastic. The improved compositions incorporate a small quantity of a phthalic acid ester into the major plastic component which is derived from the polymerization of monomeric di-ethylene glycol bis allyl carbonate. Di-substituted phthalic acid esters are preferred as the added component, with the further perference that the ester substituent has a chain length of 2 or more carbon atoms. The inclusion of the phthalic acid ester to an extent of from about 1-2% by weight of the plastic compositions is sufficient to drastically reduce the surface roughness ordinarily produced when the track recording plastic is contacted by etchants.
An improved nuclear particle track recording solid plastic composition consisting essentially of about 98% by weight of polymeric di-ethylene glycol bis allyl carbonate and an effective amount to reduce roughening caused by etchants up to about 2% by weight of a alkyl phthalic acid ester admixed therein.
In a track recording solid plastic composition consisting essentially of polymerized diethylene glycol bis allyl carbonate, the improvement comprising including in said composition an effective amount to reduce roughening caused by etchants up to about 2% by weight of a alkyl phthalic acid ester in the di-ethylene glcyol bis allyl carbonate.
A method for producing an improved nuclear particle track recording plastic composition comprising admixing together about 98% by weight of monomeric di-ethylene glycol bis allyl carbonate, a small amount of a polymerization promotor for the di-ethylene glycol bis allyl carbonate, and an effective amount to reduce roughening caused by etchants up to about 2% by weight of a alkyl phthalic acid ester;
A method for producing an improved nuclear particle track recording CR-39 plastic composition comprising adding to said CR-39 when in the monomeric state, an anti-roughening agent in an amount of up to about 2% by weight of the composition, thereafter polymerizing the CR-39 to produce a polymeric CR-39 plastic solid composition including the anti-roughening agent therein.
Dependencies are inferred from the claim text.