US4078018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft polymers and compositions of high impact strength
Assignee: Rhone Progil SA
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Filing: 1974-07-10
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Granted: 1978-03-07
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Expires: 1994-07-10
Abstract
Abstract Graft polymers based upon butadiene, alkyl acrylate, methyl methacrylate and styrene, for the improvement of the impact strength of homo- or co-polymers of vinyl chloride. Use is made of a backbone polymer formed of a butadiene-alkyl acrylate copolymer which is agglomerated and grafted with methyl methacrylate, styrene and possibly a cross-linking monomer. The composition, mixtures of homo- or co-polymers of vinyl chloride and graft polymers are usable for the manufacture of plates, bottles, wrapping sheets and bottles for packaging liquids.
Inventors
- 👤 Bernard Chauvel
- 👤 Jean-Claude Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:10
CPC Classifications
C; C08; C08F; C08F285/00; C08F279/00; C08F279/02; C08F279/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
160 words
Grafted polymers constituted of: 10 to 70% by weight backbone polymer, which is a copolymer consisting of a butadiene-alkyl acrylate in which the alkyl group contains 1-10 carbon atoms and in which the acrylate represents 5 to 50% by weight of the backbone polymer, and the backbone polymer is agglomerated into particles of 0.1 to 1 micron before grafting, and 90 to 30% by weight of grafts, in which the grafts are formed of: 20 to 80% by weight of an acrylic monomer selected from the group consisting of acrylic or methacrylic derivatives at least 50% of which is methyl methacrylate, and 80 to 20% by weight of a styrene monomer, selected from the group consisting of styrene and vinyl aromatic monomer, at least 50% of which is styrene, and 0 to 5% by weight of at least one cross-linking monomer, and in which the acrylic monomer and styrene monomer are successively grafted onto the backbone polymer in aqueous emulsion.
Claim 2
Dependent Claim
160 words
Grafted polymers constituted of: 10 to 70% by weight backbone polymer, which is a copolymer consisting of a butadiene-alkyl acrylate in which the alkyl group contains 1-10 carbon atoms and in which the acrylate represents 5 to 50% by weight of the backbone polymer, and the backbone polymer is agglomerated into particles of 0.1 to 1 micron before grafting, and 90 to 30% by weight of grafts, in which the grafts are formed of: 20 to 80% by weight of an acrylic monomer selected from the group consisting of acrylic or methacrylic derivatives at least 50% of which is methyl methacrylate, and 80 to 20% by weight of a styrene monomer, selected from the group consisting of styrene and vinyl aromatic monomer, at least 50% of which is styrene, and 0 to 5% by weight of at least one cross-linking monomer, and in which the acrylic monomer and styrene monomer are successively grafted onto the backbone polymer in aqueous emulsion.
Claim 3
Dependent Claim
27 words
Grafted polymers according to claim 1, characterized in that the alkyl acrylate is represented by the acrylates of the group consisting of methyl, ethyl, ethylhexyl and butyl.
Claim 4
Dependent Claim
14 words
Grafted polymers according to claim 1, characterized in that the backbone polymer is cross-linked.
Claim 5
Dependent Claim
53 words
Polymers according to claim 1, characterized in that the acrylic or methacrylic derivative is selected from the group consisting of acrylonitrile, methacrylonitrile, an alkyl acrylate the alkyl group of which contains 1 to 10 atoms of carbon, and an alkyl methacrylate the alkyl group of which contains 2 to 10 atoms of carbon.
Claim 6
Dependent Claim
16 words
Polymers according to claim 1, characterized in that the vinyl-aromatic monomer is represented by α-methyl styrene.
Claim 7
Dependent Claim
49 words
Process for the preparation of the grafted polymers of claim 1, characterized in that the backbone polymer is prepared by polymerization of butadiene and alkyl acrylate in aqueous emulsion, in that it is agglomerated, then grafted successively with the acrylate monomer and styrene monomer, and cross-linking monomer when present.
Claim 8
Dependent Claim
34 words
Process according to claim 6, characterized in that the polymerization of the backbone polymer is effected in the presence of 0.01 to 0.5% by weight in relation to the monomers of a chain limiter.
Claim 9
Dependent Claim
36 words
Process according to claim 6, characterized in that the polymerization of the backbone polymer is effected in the presence of at least one cross-linking monomer, in a proportion not exceeding 5% by weight of the monomers.
Claim 10
Dependent Claim
24 words
Process according to claim 6, characterized in that the size of the particles of the backbone polymer before agglomeration is less than 0.15 micron.
Claim 11
Dependent Claim
21 words
Process according to claim 6, characterized in that the agglomeration of the backbone polymer is effected in the course of polymerization.
Claim 12
Dependent Claim
27 words
Impact-resistant compositions in which the polymer components consist essentially of vinyl chloride homopolymers or copolymers, and 2 to 50% by weight of grafted polymers of claim 1.
Claim 13
Dependent Claim
35 words
Process for the preparation of the compositions of claim 11, characterized in that a vinyl chloride homopolymer or copolymer is mixed with a grafted polymer of claim 1 in the form of powder or latex.
Claim 14
Dependent Claim
13 words
Transparent and impact-resistant articles obtained by transformation of the compositions of claim 11.
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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) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |