American Cyanamid Company

Robert Jerome Tucker

Joseph A Hoffman

Ruth Greenwood

Richard Harvey Spector

Optical light filters, useful for eye protection from laser radiation, are provided. The filter can absorb harmful radiation from lasers of several (at least six (6)) types which have a range of different specific wavelengths, yet permit sufficient visibility. A novel mixture of compatible absorbers in a transparent plastic carrier, having the required stability to withstand processing conditions and having satisfactory stability for use under environmental conditions is disclosed.

Optical radiation shield for protection from multiple lasers

The addition of a nickel salt of an omega-[4-hydroxyphenyl]-alkanoic acid having at least two alkyl groups on the phenyl ring to a reaction product of a polyalkyl-substituted 4-hydroxy benzoic acid and a secondary or tertiary organic phosphite results in lubricated polyolefins having enhanced resistance to yellowing.

Nickel stabilizers and dye enhancers for polyolefins

Compositions of nickel salts of 4-hydroxybenzoic acids and esters of aliphatic or aromatic carboxylic acids, which esters have boiling points of at least about 250.degree. C. are useful for stabilizing polyolefins against degradation by heat and ultraviolet radiation and for rendering polyolefins dyeable.

Nickel salt-ester stabilizing compositions

A dyeable olefinic polymer composition comprising an olefinic polymer, and the reaction product of 50 to 90% by weight of the full nickel phenolate of o,o'-bis(p-1,1,3,3-tetramethylbutylphenol)sulfone and 50 to 10% by weight of a secondary or tertiary organic phosphite.

Use of nickel phenolate of

Products of the reaction of about 30 to 90 parts by weight of a compound of formula (I) ##STR1## wherein R.sub.1 and R.sub.2 are each alkyl radicals having up to 8 carbon atoms at least one of which is branched on the alpha carbon, and R.sub.3 and R.sub.4 are each hydrogen or an alkyl radical having up to 18 carbon atoms, and about 70 to 10 parts by weight, respectively, of a secondary or tertiary phosphite are useful for stabilizing polyolefins against degradation by heat and ultraviolet radiation and for rendering polyolefins dyeable by chelatable dyes such as aromatic ortho hydroxy azo dyes.

Optical filters comprised of a plastic film having incorporated therein a mixture of dyes including defined amounts of a copper phthalocyanine sulfonamide compound and a vanadyl phthalocyanine sulfonamide compound are substantially opaque to visible light but permit a high transmission of radiation in the near infrared region.

Visibly opaque infrared transmitting optical filter containing a

Articles of manufacture comprising polymeric substrates coated with a composition of matter consisting of an acid catalyzed reaction product of (A) a urethane prepolymer having terminal hydroxy groups produced from (1) a polyol of 200 - 3,000 molecular weight, (2) an organic diisocyanate and (3) a polyhydric alcohol; and (B) a polyalkylether of a polymethylol melamine containing various ultraviolet light absorbers, are disclosed.

Polymer substrates coated with stabilized  polymeric coating composition

Polymeric substrates, especially polycarbonates, are coated with a specific class of mar-resistant coatings under specialized conditions of time and temperature.

Process for coating polymeric substrates with mar-resistant coating

Compositions of matter consisting of (A) urethane prepolymers having terminal hydroxy groups produced from (1) a polyol of 200-3,000 molecular weight, (2) an organic polyisocyanate and (3) a polyhydric alcohol which are admixed with (B) a polyalkylether of a polymethylol and (C) an acid catalyst are rendered more adherent to polymeric substrates by incorporating therein various ultraviolet light absorbers.

Coating compositions comprising stabilized reaction product of

A plastic composition suitable for use in devices to protect glass workers from the eye-damaging light given off by molten glass is disclosed.

Plastic lenses for glass melters

Novel dyes for plastic substrates which act as filters in such substrates for argon and double-frequency neodymium laser beams are sulfonamide derivatives of 12-H-naphthoperinone. These dyes are soluble in and compatible with the plastic substrate and provide stability to ultraviolet light.

Growing community of inventors

Hackettstown, NJ, United States of America

Robert Jerome Tucker