US4514554A — Petroleum resin and pressure sensitive adhesive f…

Claim 1

Independent Claim 62 words

A petroleum resin containing a major proportion of the aluminum halide catalyzed polymer of the combination of pentadiene 1,3 and 2-methyl butenes, a number average molecular weight (Mn) of from 500 to 600, a weight average molecular weight (Mw) of from 800 to 960, a Mw/Mn ratio of 1.3 to 1.9 and a softening point ranging from 78° C. to 81° C.

Claim 2

Dependent Claim 62 words

A petroleum resin containing a major proportion of the aluminum halide catalyzed polymer of the combination of pentadiene 1,3 and 2-methyl butenes, a number average molecular weight (Mn) of from 500 to 600, a weight average molecular weight (Mw) of from 800 to 960, a Mw/Mn ratio of 1.3 to 1.9 and a softening point ranging from 78° C. to 81° C.

Claim 3

Dependent Claim 41 words

The petroleum resin according to claim 1 wherein the feedstock of said polymerizate has a cyclic diolefin to monoolefin weight ratio of no greater than 0.03 and a total diolefin to 2 methyl butenes weight ratio of from 0.8 to 1.0.

Claim 4

Dependent Claim 26 words

The petroleum resin according to claim 1 having a thermal glass transition temperature of from 45° C. to 55° C. and said Mw/Mn ratio is 1.6.

Claim 5

Dependent Claim 141 words

A process for producing a petroleum resin having a number average molecular weight (Mn), softening point and glass transition temperature suitable for use as a tackifying additive for an adhesive composition containing a block copolymer of styrene and isoprene which comprises polymerizing in the presence of aluminum chloride a C 5 -C 6 fraction from steam cracked naphtha or light refinery streams, said C 5 -C 6 fraction having a composition comprising a major proportion of piperylene and 2-methyl butenes, a cyclic diolefin to monoolefin weight ratio of no greater than 0.03 and a total diolefin to 2-methyl butenes weight ratio of from 0.8 to 1.0 and recovering a petroleum resin having a Mn of from 500 to 600, a softening point of from 78° C. to 81° C. and a glass transition temperature of from 45° C. to 55° C.

Claim 6

Dependent Claim 141 words

A process for producing a petroleum resin having a number average molecular weight (Mn), softening point and glass transition temperature suitable for use as a tackifying additive for an adhesive composition containing a block copolymer of styrene and isoprene which comprises polymerizing in the presence of aluminum chloride a C 5 -C 6 fraction from steam cracked naphtha or light refinery streams, said C 5 -C 6 fraction having a composition comprising a major proportion of piperylene and 2-methyl butenes, a cyclic diolefin to monoolefin weight ratio of no greater than 0.03 and a total diolefin to 2-methyl butenes weight ratio of from 0.8 to 1.0 and recovering a petroleum resin having a Mn of from 500 to 600, a softening point of from 78° C. to 81° C. and a glass transition temperature of from 45° C. to 55° C.

Claim 7

Dependent Claim 47 words

The process according to claim 4 wherein said polymerization is in the presence of from 1.0 to 2.0 weight percent of aluminum chloride for from 0.5 to 2 hours at a temperature of from 50° to 100° C. at a pressure of from 10 to 80 psi.

Claim 8

Dependent Claim 120 words

A pressure sensitive adhesive formulation which comprises (a) a block copolymer of styrene isoprene and styrene and (b) about 125 to 175, preferably 150, parts by weight per 100 parts of weight of said block copolymer of a petroleum resin containing a major proportion of the aluminum halide catalyzed polymerizate of the combination of pentadiene 1,3 and 2-methyl butenes, a number average molecular weight (Mn) of from 500 to 600, a weight average molecular weight (Mw) of from 800 to 960, a Mw/Mn ratio of 1.3 to 1.9 and a softening point ranging from 78°-81° C. whereby a rolling-ball tack of from 2 to 4 cm and a polyken tack of 1600 gm/cm 2 to 1900 gm/cm 2 are obtained.

Claim 9

Dependent Claim 120 words

A pressure sensitive adhesive formulation which comprises (a) a block copolymer of styrene isoprene and styrene and (b) about 125 to 175, preferably 150, parts by weight per 100 parts of weight of said block copolymer of a petroleum resin containing a major proportion of the aluminum halide catalyzed polymerizate of the combination of pentadiene 1,3 and 2-methyl butenes, a number average molecular weight (Mn) of from 500 to 600, a weight average molecular weight (Mw) of from 800 to 960, a Mw/Mn ratio of 1.3 to 1.9 and a softening point ranging from 78°-81° C. whereby a rolling-ball tack of from 2 to 4 cm and a polyken tack of 1600 gm/cm 2 to 1900 gm/cm 2 are obtained.

Claim 10

Dependent Claim 18 words

A pressure sensitive adhesive formulation according to claim 6 containing up to 2 weight percent of an antioxidant.

Claim 11

Dependent Claim 43 words

A pressure sensitive adhesive formulation according to claim 6 containing a naphtha solvent, said block copolymer and petroleum resin being dissolved in said solvent at a concentration level of 35 to about 55 weight percent based on the total weight of said composition.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1988-04-29	1988-10-29	1989-04-30	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1992-04-29	1992-10-29	1993-04-30	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1996-04-29	1996-10-29	1997-04-30	$7700.00	Window Closed / Lapsed

Petroleum resin and pressure sensitive adhesive formulations utilizing same as tackifier

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