US4088729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of bonding a phenol-based thermoplastic resin to a cured and molded thermoset phenolic plastic
Assignee: Individual
•
Filing: 1975-11-14
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Granted: 1978-05-09
•
Expires: 1995-11-14
Abstract
Abstract A method of making grinding wheel mounts by molding a central hub onto a thermoset plastic abrasive disc is provided. An aromatic polycarbonate thermoplastic resin is molded to form a hub on a cured thermoset plastic abrasive disc. It is believed that the polycarbonate forms both a mechanical and chemical bond with the thermoset plastic to provide an efficient method of producing grinding wheels.
Inventors
- 👤 William F. Sherman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:17
CPC Classifications
B; B24; B24D; B24D18/00; B29; B29C; B29C45/00; B29C45/14; B29C45/14336; B29C45/14344; B29C45/14778; B29C2045/1486; B29C2045/14868; B29C2045/14877
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
75 words
A method of bonding a phenol-based thermoplastic resin to a cured and molded thermoset phenolic plastic comprising the steps of: heating the thermoplastic resin to a temperature between 450° and 550° F; heating the thermoset plastic to a temperature between 150° and 200° F; and pressurizing the thermoplastic resin and thermoset plastic against each other in a pressure range between 1000 and 1200 psi, whereby the thermoplastic resin and the thermoset plastic bond together chemically.
Claim 2
Independent Claim
75 words
A method of bonding a phenol-based thermoplastic resin to a cured and molded thermoset phenolic plastic comprising the steps of: heating the thermoplastic resin to a temperature between 450° and 550° F; heating the thermoset plastic to a temperature between 150° and 200° F; and pressurizing the thermoplastic resin and thermoset plastic against each other in a pressure range between 1000 and 1200 psi, whereby the thermoplastic resin and the thermoset plastic bond together chemically.
Claim 3
Dependent Claim
18 words
A method of bonding as in claim 1 wherein said thermoset plastic is made from a phenol-formaldehyde resin.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein the phenol-formaldehyde resin is a one-stage resin.
Claim 5
Dependent Claim
13 words
The method of claim 2 wherein the phenol-formaldehyde resin is a two-stage resin.
Claim 6
Dependent Claim
16 words
The method of claim 4 wherein the molecular weight of said phenol-formaldehyde resin ranges from 450-550.
Claim 7
Independent Claim
86 words
A method of making a composite article comprising the steps of: placing a cured and molded thermoset phenolic plastic article in a mold; melting a phenol-based thermoplastic resin and introducing it into said mold to intimately contact said article; allowing said molten phenol-based thermoplastic resin to cool and solidify such that said resin and said article bond together to form a composite article; and removing said composite article from said mold, to form a cross-linking chemical bond between the thermoplastic resin and the thermoset phenolic plastic.
Claim 8
Independent Claim
86 words
A method of making a composite article comprising the steps of: placing a cured and molded thermoset phenolic plastic article in a mold; melting a phenol-based thermoplastic resin and introducing it into said mold to intimately contact said article; allowing said molten phenol-based thermoplastic resin to cool and solidify such that said resin and said article bond together to form a composite article; and removing said composite article from said mold, to form a cross-linking chemical bond between the thermoplastic resin and the thermoset phenolic plastic.
Claim 9
Dependent Claim
13 words
The method of claim 1, wherein said thermoplastic resin is a phenol-based polycarbonate.
Claim 10
Independent Claim
73 words
A method of bonding a phenol-based thermoplastic resin to a cured and molded thermoset phenolic plastic comprising the steps of: placing a cured and molded thermoset phenolic plastic article in a mold; melting a phenol-based thermoplastic resin and introducing it into said mold to intimately contact said article; allowing said molten phenol-based thermoplastic resin to cool and solidify to form a cross-linking chemical bond between the thermoplastic resin and the thermoset phenolic plastic.
Claim 11
Independent Claim
73 words
A method of bonding a phenol-based thermoplastic resin to a cured and molded thermoset phenolic plastic comprising the steps of: placing a cured and molded thermoset phenolic plastic article in a mold; melting a phenol-based thermoplastic resin and introducing it into said mold to intimately contact said article; allowing said molten phenol-based thermoplastic resin to cool and solidify to form a cross-linking chemical bond between the thermoplastic resin and the thermoset phenolic plastic.
Claim 12
Dependent Claim
15 words
The method of claim 8 wherein said thermoset phenolic plastic is made from phenol-formaldehyde resin.
Claim 13
Dependent Claim
13 words
The method of claim 9, wherein the phenol-formaldehyde resin is a one-stage resin.
Claim 14
Dependent Claim
13 words
The method of claim 9, wherein the phenol-formaldehyde resin is a two-stage resin.
Claim 15
Dependent Claim
18 words
The method of claim 11, wherein the molecular weight of said phenol-formaldehyde resin ranges from 450 to 550.
Claim 16
Dependent Claim
13 words
The method of claim 8, wherein the thermoplastic resin is a phenol-based polycarbonate.
Claim 17
Dependent Claim
22 words
The method of claim 13, wherein the polycarbonate has the following formula: ##STR2## and X is an integer of 50 to 400.
Claim 18
Dependent Claim
17 words
The method of claim 14, wherein the polycarbonate is an ester of carbonic acid and bis-phenol A.
Claim 19
Dependent Claim
26 words
The method of claim 9, wherein said thermoplastic resin is heated to a temperature of 450° to 550° F. before it is introduced into said mold.
Claim 20
Dependent Claim
27 words
The method of claim 16, wherein said thermoset phenolic plastic may be preheated to a temperature between 150° and 200° F. prior to insertion into said mold.
Claim 21
Dependent Claim
22 words
The method of claim 7, wherein said polycarbonate has the following formula: ##STR3## and X is an integer of 50 to 400.
Claim 22
Dependent Claim
17 words
The method of claim 18, wherein the polycarbonate is an ester of carbonic acid and bis-phenol A.
Claim 23
Dependent Claim
23 words
The method of claim 6, wherein said thermoplastic resin is a phenol-based polycarbonate, and said thermoset plastic is made from a phenol-formaldehyde resin.
Claim 24
Dependent Claim
13 words
The method of claim 20, wherein the phenol-formaldehyde resin is a one-stage resin.
Claim 25
Dependent Claim
13 words
The method of claim 20, wherein the phenol-formaldehyde resin is a two-stage resin.
Claim 26
Dependent Claim
18 words
The method of claim 22, wherein the molecular weight of said phenol-formaldehyde resin ranges from 450 to 550.
Claim 27
Dependent Claim
19 words
The method of claim 20, wherein the polycarbonate has the following formula: ##STR4## and X is equal to 50-400.
Claim 28
Dependent Claim
17 words
The method of claim 24, wherein the polycarbonate is an ester of carbonic acid and bis-phenol A.
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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) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |