US4608418A
Expired / Lapsed
US
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Hot melt composition and process for forming the same
Assignee: REFAC
•
Filing: 1985-02-22
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Granted: 1986-08-26
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Expires: 2005-02-22
Abstract
Abstract Thermoplastic hot melt compositions and process for forming such compositions are disclosed. The compositions comprise a polyurethane having at least one plasticizer reacted therein formed by heating a reaction mixture comprising at least one isocyanate having a functionality less than about 2, at least one long chain polyol, at least one chain extender and the at least one plasticizer at a temperature of at least about 330 DEG F. where the components are present in an amount as defined in the specification. The process is adequately reflected by the above language.
Inventors
- 👤 Richard W. Czerwinski
- 👤 Larry D. Osterberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:45
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C09; C09J; C09J175/00; C09J175/04; C08G18/08; C08G18/28; C08G18/65; C08G18/70; C08G18/72; C08G18/81; C08G18/8125; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/49; C08K5/51; C08K5/52; C08K5/521
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
126 words
A thermoplastic hot melt composition comprising a polyurethane having at least one plasticizer reacted therein formed by heating a reaction mixture comprising at least one isocyanate having a functionality less than about 2.2, at least one long chain polyol, at least one chain extender and the at least one plasticizer at a temperature of at least about 330° F., wherein said components are present in amounts sufficient to meet the following formula: (A+B+C)/D=0.5 to about 7.0 wherein: A represents the equivalent weight of the long chain polyol x the moles thereof used; B represents the equivalent weight of the chain extender x the moles thereof used; C represents the equivalent weight of the isocyanate x the moles thereof used; and D represents the grams of plasticizer.
Claim 2
Dependent Claim
126 words
A thermoplastic hot melt composition comprising a polyurethane having at least one plasticizer reacted therein formed by heating a reaction mixture comprising at least one isocyanate having a functionality less than about 2.2, at least one long chain polyol, at least one chain extender and the at least one plasticizer at a temperature of at least about 330° F., wherein said components are present in amounts sufficient to meet the following formula: (A+B+C)/D=0.5 to about 7.0 wherein: A represents the equivalent weight of the long chain polyol x the moles thereof used; B represents the equivalent weight of the chain extender x the moles thereof used; C represents the equivalent weight of the isocyanate x the moles thereof used; and D represents the grams of plasticizer.
Claim 3
Dependent Claim
134 words
A process for forming a thermoplastic hot melt composition comprising a polyurethane having at least one plasticizer reacted therein formed from at least one isocyanate having a functionality less than about 2.2, at least one long chain polyol, at least one chain extender and the at least one plasticizer which comprises heating a mixture of the above-named components at a temperature of at least about 330° F., wherein said components are present in an amount to meet the following formula: (A+B+C)/D=0.5 to about 7.0 wherein: A represents the equivalent weight of the long chain polyol x the moles thereof used; B represents the equivalent weight of the chain extender x the moles thereof used; C represents the equivalent weight of the isocyanate x the moles thereof used; and D represents the grams of plasticizer.
Claim 4
Dependent Claim
134 words
A process for forming a thermoplastic hot melt composition comprising a polyurethane having at least one plasticizer reacted therein formed from at least one isocyanate having a functionality less than about 2.2, at least one long chain polyol, at least one chain extender and the at least one plasticizer which comprises heating a mixture of the above-named components at a temperature of at least about 330° F., wherein said components are present in an amount to meet the following formula: (A+B+C)/D=0.5 to about 7.0 wherein: A represents the equivalent weight of the long chain polyol x the moles thereof used; B represents the equivalent weight of the chain extender x the moles thereof used; C represents the equivalent weight of the isocyanate x the moles thereof used; and D represents the grams of plasticizer.
Claim 5
Dependent Claim
139 words
A thermoplastic hot melt composition comprising a polyurethane having at least one plasticizer reacted therein formed from a reaction mixture comprising at least one isocyanate having a functionality less than about 2.2, at least one long chain polyol, at least one chain extender and the at least one plasticizer by heating a mixture of the above-named components at a temperature of at least about 330° F. for at least about 2 hours, wherein said components are present in amounts sufficient to meet the following formula: (A+B+C)/D=0.5 to about 7.0 wherein: A represents the equivalent weight of the long chain polyol x the moles thereof used; B represents the equivalent weight of the chain extender x the moles thereof used; C represents the equivalent weight of the isocyanate x the moles thereof used; and D represents the grams of plasticizer.
Claim 6
Dependent Claim
139 words
A thermoplastic hot melt composition comprising a polyurethane having at least one plasticizer reacted therein formed from a reaction mixture comprising at least one isocyanate having a functionality less than about 2.2, at least one long chain polyol, at least one chain extender and the at least one plasticizer by heating a mixture of the above-named components at a temperature of at least about 330° F. for at least about 2 hours, wherein said components are present in amounts sufficient to meet the following formula: (A+B+C)/D=0.5 to about 7.0 wherein: A represents the equivalent weight of the long chain polyol x the moles thereof used; B represents the equivalent weight of the chain extender x the moles thereof used; C represents the equivalent weight of the isocyanate x the moles thereof used; and D represents the grams of plasticizer.
Claim 7
Dependent Claim
140 words
A process for forming a thermoplastic hot melt composition comprising a polyurethane having at least one plasticizer reacted therein formed from at least one isocyanate having a functionality less than about 2.2, at least one long chain polyol, at least one chain extnder and the at least one plasticizer which comprises heating a mixture of the above-named components at a temperature of at least about 330° F. for at least about 2 hours, wherein said components are present in an amount to meet the following formula: (A+B+C)/D=0.5 to about 7.0 wherein: A represents the equivalent weight of the long chain polyol x the moles thereof used; B represents the equivalent weight of the chain extender x the moles thereof used; C represents the equivalent weight of the isocyanate x the moles thereof used; and D represents the grams of plasticizer.
Claim 8
Dependent Claim
140 words
A process for forming a thermoplastic hot melt composition comprising a polyurethane having at least one plasticizer reacted therein formed from at least one isocyanate having a functionality less than about 2.2, at least one long chain polyol, at least one chain extnder and the at least one plasticizer which comprises heating a mixture of the above-named components at a temperature of at least about 330° F. for at least about 2 hours, wherein said components are present in an amount to meet the following formula: (A+B+C)/D=0.5 to about 7.0 wherein: A represents the equivalent weight of the long chain polyol x the moles thereof used; B represents the equivalent weight of the chain extender x the moles thereof used; C represents the equivalent weight of the isocyanate x the moles thereof used; and D represents the grams of plasticizer.
Claim 9
Dependent Claim
29 words
A thermoplastic hot melt composition as claimed in claim 1, wherein said composition is substantially completely cured in situ and then is further heated for at least 3 minutes.
Claim 10
Dependent Claim
20 words
A thermoplastic hot melt composition as claimed in claim 1, wherein said heating is for at least about 2 hours.
Claim 11
Dependent Claim
37 words
A thermoplastic hot melt composition as claimed in claim 1, wherein said thermoplastic hot melt composition will exhibit a viscosity of less than about 50,000 cps at a temperature of about 250° F. to about 450° F.
Claim 12
Dependent Claim
37 words
A thermoplastic hot melt composition as claimed in claim 1, wherein said thermoplastic hot melt composition will exhibit a viscosity of less than about 25,000 cps at a temperature of about 250° F. to about 450° F.
Claim 13
Dependent Claim
20 words
A thermoplastic hot melt composition as claimed in claim 1, wherein said polyisocyanate has a functionality of 2.15 or less.
Claim 14
Dependent Claim
18 words
A thermoplastic hot melt composition as claimed in claim 1, wherein said polyisocyanate has a functionality of 2.0-2.1.
Claim 15
Dependent Claim
17 words
A thermoplastic hot melt composition as claimed in claim 1, wherein said polyisocyanate contains two isocyanate groups.
Claim 16
Dependent Claim
16 words
A thermoplastic hot melt composition as claimed in claim 1, wherein said polyisocyanate is 4,4-diphenylmethane diisocyanate.
Claim 17
Dependent Claim
25 words
A thermoplastic hot melt composition as claimed in claim 1, wherein said isocyanate contains two isocyanate groups and contains from 6 to 100 carbon atoms.
Claim 18
Dependent Claim
27 words
A thermoplastic hot melt composition as claimed in claim 1, wherein said long chain polyol has a number average molecular weight of more than 500 to 5,000.
Claim 19
Dependent Claim
27 words
A thermoplastic hot melt composition as claimed in claim 1, wherein said long chain polyol has a number average molecular weight of more than 800 to 300.
Claim 20
Dependent Claim
23 words
A thermoplastic hot melt composition as claimed in claim 1, wherein said long chain polyol has an average functionality of 2.2 or below.
Claim 21
Dependent Claim
29 words
A thermoplastic hot melt composition as claimed in claim 1, wherein said chain extending agent has a number average molecular weight of from about 52 to less than 500.
Claim 22
Dependent Claim
20 words
A thermoplastic hot melt composition as claimed in claim 1, wherein the NCO/OH ratio is about 0.95 to about 1.05.
Claim 23
Dependent Claim
25 words
A thermoplastic hot melt composition as claimed in claim 1, wherein the plasticizer comprises from about 20 to about 70% of the total composition weight.
Claim 24
Dependent Claim
25 words
A thermoplastic hot melt composition as claimed in claim 1, wherein the plasticizer comprises from about 25 to about 65% of the total composition weight.
Claim 25
Dependent Claim
29 words
A thermoplastic hot melt composition as claimed in claim 1, wherein heating is for 2 to 3 hours at a temperature of from 350° F. to about 430° F.
Claim 26
Dependent Claim
26 words
The process as claimed in claim 2, wherein said composition is substantially completely cured in situ and then is further heated for at least 3 minutes.
Claim 27
Dependent Claim
17 words
The process as claimed in claim 2, wherein said heating is for at least about 2 hours.
Claim 28
Dependent Claim
34 words
The process as claimed in claim 2, wherein said thermoplastic hot melt composition will exhibit a viscosity of less than about 50,000 cps at a temperature of about 250° F. to about 450° F.
Claim 29
Dependent Claim
34 words
The process as claimed in claim 2, wherein said thermoplastic hot melt composition will exhibit a viscosity of less than about 25,000 cps at a temperature of about 250° F. to about 450° F.
Claim 30
Dependent Claim
17 words
The process as claimed in claim 2, wherein said polyisocyanate has a functionality of 2.15 or less.
Claim 31
Dependent Claim
15 words
The process as claimed in claim 2, wherein said polyisocyanate has a functionality of 2.0-2.1.
Claim 32
Dependent Claim
14 words
The process as claimed in claim 2, wherein said polyisocyanate contains two isocyanate groups.
Claim 33
Dependent Claim
13 words
The process as claimed in claim 2, wherein said polyisocyanate is 4,4-diphenylmethane diisocyanate.
Claim 34
Dependent Claim
22 words
The process as claimed in claim 2, wherein said isocyanate contains two isocyanate groups and contains from 6 to 100 carbon atoms.
Claim 35
Dependent Claim
24 words
The process as claimed in claim 2, wherein said long chain polyol has a number average molecular weight of more than 500 to 5,000.
Claim 36
Dependent Claim
24 words
The process as claimed in claim 2, wherein said long chain polyol has a number average molecular weight of more than 800 to 300.
Claim 37
Dependent Claim
20 words
The process as claimed in claim 2, wherein said long chain polyol has an average functionality of 2.2 or below.
Claim 38
Dependent Claim
26 words
The process as claimed in claim 2, wherein said chain extending agent has a number average molecular weight of from about 52 to less than 500.
Claim 39
Dependent Claim
17 words
The process as claimed in claim 2, wherein the NCO/OH ratio is about 0.95 to about 1.05.
Claim 40
Dependent Claim
22 words
The process as claimed in claim 2, wherein the plasticizer comprises from about 20 to about 70% of the total composition weight.
Claim 41
Dependent Claim
22 words
The process as claimed in claim 2, wherein the plasticizer comprises from about 25 to about 65% of the total composition weight.
Claim 42
Dependent Claim
26 words
The process as claimed in claim 2, wherein heating is for 2 to 3 hours at a temperature of from 350° F. to about 430° F.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-25 | 1990-02-24 | 1990-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-25 | 1994-02-24 | 1994-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-25 | 1998-02-24 | 1998-08-26 | $7700.00 | Window Closed / Lapsed |