US3919157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic resin composition having high transparency and high impact strength
Assignee: Mitsubishi Chemical Corp
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Filing: 1974-02-12
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Granted: 1975-11-11
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Expires: 1994-02-12
Abstract
Abstract A novel resin composition having high transparency and high impact strength comprises (I) 97 to 99.99 percent by weight of a resin composed of (A) 10 parts by weight of polybutadiene or a styrene-butadiene rubber containing at least 60 percent by weight of butadiene which has a weight average particle diameter of 0.20 to 0.35 Mu with a particle diameter distribution in the range of 0.05 to 1.5 Mu and a degree of swelling of at least 10, and (B) 15 to 190 parts by weight of a terpolymer of a monomer mixture comprising 30 to 65 percent by weight of styrene, 15 to 68 percent by weight of methyl methacrylate and 2 to 20 percent by weight of acrylonitrile (said resin may be a mixture of (A) and (B) or may be a graft-copolymer of (B) and (A)) and (II) 0.01 to 3 percent by weight of a polyorganosiloxane having a viscosity of 10 to 30 centistokes. From such composition, a transparent and impact resistant molded article can be produced regardless of the molding conditions. Further, the composition, when used in combination with a vinyl chloride polymer, can give an impact resistant resin which is transparent or translucent and has a self-extinguishing property.
Inventors
- 👤 Fumio Ide
- 👤 Kazuo Kishida
- 👤 Toshio Sakurai
- 👤 Syoichi Kawakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:46
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02; C08F279/04; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; C08L51/00; C08L51/04; C08L83/00; C08L83/04; C08L9/00; C08L9/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
215 words
A THERMOPLASTIC RESIN COMPOSITION HAVING A HIGH TRANSPARENCY SUBSTANTIALLY UNAFECTED BY MOULDING CONDITIONS AND A HIGH IMAPCT STRENGTH WHICH COMPRISES (1) 97 TO 99.999 PERCENT BY WEIGHT OF A RESIN COMPOSED OF (A) 10 PARTS BY WEIGHT OF A BUTADINE RUBBER SELECTED FROM THE GROUP CONSISTING OF POLYBURADINE AND STYRENEBUTADINE RUBBERS CONTAINING AT LEAST 60 PERCENT BY WEIGHT, OF BUTADIENE WHICH BUTADIENE RUBBER HAS A WEIGHT AVERAGE PARTICLE DIAMETER OF 0.20 TO 0.35 U, A PARTICLE DIAMETER DISTRIBUTION IN THE RANGE OF 0.05 TO 1.5 U AND A DEGREE OF SWELLING OF AT LEAST 10, AND (B) TO 190 PARTS BY WEIGHT OF A TERPOLYMER OF A MONOMER MIXTURE COMPRISING 30 TO 65 PERCENT BY WEIGHT OF STYENE, 15 TO 65 PERCEN BY WEIGHT OF METHYL METHACRYLATE AND 2 TO 20 PERCENT BY WEIGHT OF ACRYLONTRILE, AT LEAST A PORTION OF (1) BEING A GRAFT-COPOLYMER OF (A) AND (BE OBTAINED BY POLYMERIZING AT LEAST 5 PARTS BY WEIGHT OF SAID MONOMER MIXTURE IN THE PRENSENCE OF SAID (A) COMPONENT OVER A PERIOD OF 30 MINUTES TO 10 HOUTS IN THE PRESENCE OF A RADICAL POLYMERIZATION INITATOR, SAID POLYMERZATION BEING AFFECTED WHILE CONTINUOUSLY OR INTERMITTENTLY ADDING SAID MONOMER MIXTURE TO A LATEXT OF SAID (A) COMPONENT, AND SAID MONOMER MIXTURE BY WEIGHT OF AN OILY POLYORGANSILOXANE.
Claim 2
Dependent Claim
215 words
A THERMOPLASTIC RESIN COMPOSITION HAVING A HIGH TRANSPARENCY SUBSTANTIALLY UNAFECTED BY MOULDING CONDITIONS AND A HIGH IMAPCT STRENGTH WHICH COMPRISES (1) 97 TO 99.999 PERCENT BY WEIGHT OF A RESIN COMPOSED OF (A) 10 PARTS BY WEIGHT OF A BUTADINE RUBBER SELECTED FROM THE GROUP CONSISTING OF POLYBURADINE AND STYRENEBUTADINE RUBBERS CONTAINING AT LEAST 60 PERCENT BY WEIGHT, OF BUTADIENE WHICH BUTADIENE RUBBER HAS A WEIGHT AVERAGE PARTICLE DIAMETER OF 0.20 TO 0.35 U, A PARTICLE DIAMETER DISTRIBUTION IN THE RANGE OF 0.05 TO 1.5 U AND A DEGREE OF SWELLING OF AT LEAST 10, AND (B) TO 190 PARTS BY WEIGHT OF A TERPOLYMER OF A MONOMER MIXTURE COMPRISING 30 TO 65 PERCENT BY WEIGHT OF STYENE, 15 TO 65 PERCEN BY WEIGHT OF METHYL METHACRYLATE AND 2 TO 20 PERCENT BY WEIGHT OF ACRYLONTRILE, AT LEAST A PORTION OF (1) BEING A GRAFT-COPOLYMER OF (A) AND (BE OBTAINED BY POLYMERIZING AT LEAST 5 PARTS BY WEIGHT OF SAID MONOMER MIXTURE IN THE PRENSENCE OF SAID (A) COMPONENT OVER A PERIOD OF 30 MINUTES TO 10 HOUTS IN THE PRESENCE OF A RADICAL POLYMERIZATION INITATOR, SAID POLYMERZATION BEING AFFECTED WHILE CONTINUOUSLY OR INTERMITTENTLY ADDING SAID MONOMER MIXTURE TO A LATEXT OF SAID (A) COMPONENT, AND SAID MONOMER MIXTURE BY WEIGHT OF AN OILY POLYORGANSILOXANE.
Claim 3
Dependent Claim
31 words
A composition according to claim 1, wherein the resin (I) is obtained by continuously or intermittently adding and polymerizing the monomer mixture (B) in the presence of the butadiene rubber (A).
Claim 4
Dependent Claim
56 words
A composition according to claim 1, wherein the resin (I) is obtained by polymerizing, while adding continuously or intermittently, a part of the monomer mixture (B) in the presence of the butadiene rubber (A) to prepare a resin (I'') and then polymerizing the remainder of the monomer mixture (B) in the presence of the resin (I'').
Claim 5
Dependent Claim
64 words
A composition according to claim 1, wherein the resin (I) is obtained by polymerizing, while adding continuously or intermittently, at least 5 parts by weight of the monomer mixture (B) in the presence of the butadiene rubber (A) to prepare a resin (I'') and then blending the resin (I'') with a terpolymer (C) obtained by separately polymerizing the remainder of the monomer mixture (B).
Claim 6
Dependent Claim
57 words
A composition according tO claim 4, wherein the terpolymer (C) is obtained by continuously adding the remainder of the monomer mixture (B) to water containing an emulsifier in an amount within the range from the critical micelle concentration thereof to 1.5 percent by weight based on the weight of the said remainder of the monomer mixture (B).
Claim 7
Dependent Claim
17 words
A composition according to claim 1, wherein the polyorganosiloxane is polydimethyl siloxane, polydiethyl siloxane or polyphenylmethyl siloxane.
Claim 8
Dependent Claim
17 words
A composition according to claim 1, wherein the polyorganosiloxane has a viscosity of 10 to 30 centistokes.
Claim 9
Dependent Claim
31 words
A composition according to claim 1, which is blended with a vinyl chloride polymer in an amount of 5 to 70 percent by weight based on the weight of said polymer.
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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |