Patent US3903023A successfully refreshed from Google Patents.
US3903023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of styrene polymer foams
Assignee: Produits Chimiques Ugine Kuhlmann
•
Filing: 1972-08-29
•
Granted: 1975-09-02
•
Expires: 1992-08-29
Abstract
Abstract Improved expandable styrene polymer thermoplastic compositions may be produced by combining a thermoplastic styrene polymer, a resinous styrene polymer having a high average molecular weight and a foaming agent. A method of extrusion employing such compositions is disclosed.
Inventors
- 👤 Pierre Emile Boutillier
- 👤 Marcel Norbert Rozenbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:25
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J9/04; C08L; C08L55/00; C08L55/02; C08J2325/00; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06; C08J2425/00; C08J2457/00; Y; Y10; Y10S; Y10S264/00; Y10S264/14
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
116 words
A PROCESS FOR IMPROVING THE FOAMABILITY OF A THERMOPLASTIC STYRENE POLYMER COMPRISING ADDING TO A CONVENTIONAL THERMOPLASTIC STYRENE POLYMER (A) A HIGH MOLECULAR WEIGHT RESINOUS THERMOPLASTIC STYRENE POLYMER (B) SELECTED FROM THE GROUP CONSISTING OF POLYMERS OF NONSUBSTITUTED OR SUBSTITUTED STYRENE MONOMERS AND COPOLYMERS OF SAID STYRENE MONOMER WITH A COMONOMER CONTAINING A CH2 = C < RADICAL, SAID RESINOUS POLYMER (B) BEING COMPATIBLE WITH THE THERMOPLASTIC STYRENE POLYMER (A) HAVING AN AVERAGE MOLECULAR WEIGHT EQUAL TO OR GREATER THAN 10**6 AS DETERMINED BY THE STANDINGERMARK-HOUWINK EQUATION, AND FOAMING AGENT, AND WHEREIN SAID RESINOUS STYRENE POLYMER (B) IS PRESENT IN A PROPORTION OF 1 TO 40 PARTS BY WEIGHT PER 100 PARTS OF CONVENTIONAL POLYMER (A).
Claim 2
Dependent Claim
116 words
A PROCESS FOR IMPROVING THE FOAMABILITY OF A THERMOPLASTIC STYRENE POLYMER COMPRISING ADDING TO A CONVENTIONAL THERMOPLASTIC STYRENE POLYMER (A) A HIGH MOLECULAR WEIGHT RESINOUS THERMOPLASTIC STYRENE POLYMER (B) SELECTED FROM THE GROUP CONSISTING OF POLYMERS OF NONSUBSTITUTED OR SUBSTITUTED STYRENE MONOMERS AND COPOLYMERS OF SAID STYRENE MONOMER WITH A COMONOMER CONTAINING A CH2 = C < RADICAL, SAID RESINOUS POLYMER (B) BEING COMPATIBLE WITH THE THERMOPLASTIC STYRENE POLYMER (A) HAVING AN AVERAGE MOLECULAR WEIGHT EQUAL TO OR GREATER THAN 10**6 AS DETERMINED BY THE STANDINGERMARK-HOUWINK EQUATION, AND FOAMING AGENT, AND WHEREIN SAID RESINOUS STYRENE POLYMER (B) IS PRESENT IN A PROPORTION OF 1 TO 40 PARTS BY WEIGHT PER 100 PARTS OF CONVENTIONAL POLYMER (A).
Claim 3
Dependent Claim
13 words
A process as claimed in claim 1 wherein the polymer (A) is polystyrene.
Claim 4
Dependent Claim
13 words
A process as claimed in claim 2 wherein the polymer (B) is polystyrene.
Claim 5
Dependent Claim
16 words
A process as claimed in claim 2 wherein the polymer (B) is a styrene-methyl methacrylate copolymer.
Claim 6
Dependent Claim
15 words
A process as claimed in claim 1 wherein the polymer (A) is high impact polystyrene.
Claim 7
Dependent Claim
13 words
A process as claimed in claim 5 wherein the polymer (B) is polystyrene.
Claim 8
Dependent Claim
16 words
A process as claimed in claim 5 wherein the polymer (B) is a styrene-methyl methacrylate copolymer.
Claim 9
Dependent Claim
16 words
A process as claimed in claim 1 wherein the polymer (A) is an acrylonitrile butadiene-styrene copolymer.
Claim 10
Dependent Claim
15 words
A process as claimed in claim 8 wherein the polymer (B) is a styrene-acrylonitrile copolymer.
Claim 11
Dependent Claim
16 words
A process as claimed in claim 8 wherein the polymer (B) is a styrene-acrylonitrile-methyl methacrylate copolymer.
Claim 12
Dependent Claim
15 words
A process as claimed in claim 1 wherein the polymer (A) is a styrene-acrylonitrile copolymer.
Claim 13
Dependent Claim
15 words
A process as claimed in claim 11 wherein the polymer (B) is a styrene-acrylonitrile copolymer.
Claim 14
Dependent Claim
16 words
A process as claimed in claim 11 wherein the polymer (B) is a styrene-acrylonitrile-methyl methacrylate copolymer.
Claim 15
Independent Claim
157 words
A method for the production of an extruded product from a foamable plastic composition, said composition comprising a styrene polymer consisting essentially of a conventional thermoplastic styrene polymer (A) to which is added a resinous thermoplastic styrene polymer (B) selected from the group consisting of polymers of non-substituted or substituted styrene monomers and copolymers of said styrene monomer with a co-monomer containing a CH2 C < radical, said resinous polymer (B) being compatible with the thermoplastic styrene polymer (A), having an average molecular weight equal to or greater than 106 as determined by the Standinger-Mark-Houwink equation and wherein said resinous styrene polymer (B) is present in a proportion of 1 to 40 parts by weight per 100 parts of conventional polymer (A) and a foaming agent, comprising extruding through a die said expandable composition in an unexpanded or partially expanded state, permitting said composition after leaving said die to foam and solidify and recovering the extruded product.
Claim 16
Independent Claim
157 words
A method for the production of an extruded product from a foamable plastic composition, said composition comprising a styrene polymer consisting essentially of a conventional thermoplastic styrene polymer (A) to which is added a resinous thermoplastic styrene polymer (B) selected from the group consisting of polymers of non-substituted or substituted styrene monomers and copolymers of said styrene monomer with a co-monomer containing a CH2 C < radical, said resinous polymer (B) being compatible with the thermoplastic styrene polymer (A), having an average molecular weight equal to or greater than 106 as determined by the Standinger-Mark-Houwink equation and wherein said resinous styrene polymer (B) is present in a proportion of 1 to 40 parts by weight per 100 parts of conventional polymer (A) and a foaming agent, comprising extruding through a die said expandable composition in an unexpanded or partially expanded state, permitting said composition after leaving said die to foam and solidify and recovering the extruded product.
Claim 17
Dependent Claim
116 words
A foamable thermoplastic styrene polymer composition having improved foaming characteristics, consisting essentially of a conventional thermoplastic styrene polymer (A) to which is added a resinous thermoplastic styrene polymer (B), selected from the group consisting of polymers of non-substituted and substituted styrene monomers and copolymers of said styrene monomers with a comonomer containing a CH2 C < radical, said resinous polymer (B) being compatible with the conventional styrene polymer (A), having an average molecular weight equal to or greater than 106 as determined by the Standinger-Mark-Houwink equation, and a foaming agent and wherein said resinous styrene polymer (B) is present in a proportion of 1 to 40 parts by weight per 100 parts of basic polymer (A).
Claim 18
Dependent Claim
116 words
A foamable thermoplastic styrene polymer composition having improved foaming characteristics, consisting essentially of a conventional thermoplastic styrene polymer (A) to which is added a resinous thermoplastic styrene polymer (B), selected from the group consisting of polymers of non-substituted and substituted styrene monomers and copolymers of said styrene monomers with a comonomer containing a CH2 C < radical, said resinous polymer (B) being compatible with the conventional styrene polymer (A), having an average molecular weight equal to or greater than 106 as determined by the Standinger-Mark-Houwink equation, and a foaming agent and wherein said resinous styrene polymer (B) is present in a proportion of 1 to 40 parts by weight per 100 parts of basic polymer (A).
Claim 19
Dependent Claim
13 words
A composition as claimed in claim 15 wherein the polymer (A) is polystyrene.
Claim 20
Dependent Claim
13 words
A composition as claimed in claim 16 wherein the polymer (B) is polystyrene.
Claim 21
Dependent Claim
16 words
A composition as claimed in claim 16 wherein the polymer (B) is a styrene-methyl methacrylate copolymer.
Claim 22
Dependent Claim
15 words
A composition as claimed in claim 15 wherein the polymer (A) is high impact polystyrene.
Claim 23
Dependent Claim
13 words
A composition as claimed in claim 19 wherein the polymer (B) is polystyrene.
Claim 24
Dependent Claim
16 words
A composition as claimed in claim 19 wherein the polymer (B) is a styrene-methyl methacrylate copolymer.
Claim 25
Dependent Claim
15 words
A composition as claimed in claim 15 wherein the polymer (A) is an acrylonitrile-butadiene-styrene copolymer.
Claim 26
Dependent Claim
15 words
A composition as claimed in claim 22 wherein the polymer (B) is a styrene-acrylonitrile copolymer.
Claim 27
Dependent Claim
16 words
A composition as claimed in claim 22 wherein the polymer (B) is a styrene-acrylonitrile-methyl methacrylate copolymer.
Claim 28
Dependent Claim
15 words
A composition as claimed in claim 25 wherein the polymer (B) is a styrene-acrylonitrile copolymer.
Claim 29
Dependent Claim
16 words
A composition as claimed in claim 15 wherein the polymer (B) is a styrene-acrylonitrile-methyl methacrylate copolymer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |