US4446276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ageing-resistant, processing-stable, high strength mixtures based on thermoplastic polyesters
Assignee: Bayer AG
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Filing: 1982-04-22
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Granted: 1984-05-01
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Expires: 2002-04-22
Abstract
Abstract A graft polymer is obtained from a completely broken latex of an acrylate rubber which is suspended in water and from copolymerisable monomers, in the absence of a suspending agent, which graft polymer may be distributed in thermoplastic polyesters to form particles having a relatively small average diameter.
Inventors
- 👤 Rudolf Binsack
- 👤 Christian Lindner
- 👤 Dieter Rempel
- 👤 Karl-Heinz Ott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:24
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/93; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/11; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
173 words
A mixture comprising: (A) from 55 to 99% by weight, based on the total of components A and B, of at least one thermoplastic polyester based on aromatic dicarboxylic acids, and (B) from 1 to 45% by weight, based on the total of components A and B, of a pulverulent graft polymer having an average particle size of 0.01 to 10 mm and comprising (a) from 80 to 98% by weight, based on B, of an acrylate rubber having a glass transition temperature of below 0° C. as the graft base, and (b) from 2 to 20% by weight, based on B, of units of at least one polymerisable ethylenically unsaturated monomer which does not form a stable emulsion, the homo- or copolymers of which, produced in the absence of (a), have a glass transition temperature of above 25° C., as graft monomers, characterised in that the graft polymer B is obtainable by grafting monomer (b) on the completely broken latex of (a) suspended in water, in the absence of a suspending agent.
Claim 2
Dependent Claim
173 words
A mixture comprising: (A) from 55 to 99% by weight, based on the total of components A and B, of at least one thermoplastic polyester based on aromatic dicarboxylic acids, and (B) from 1 to 45% by weight, based on the total of components A and B, of a pulverulent graft polymer having an average particle size of 0.01 to 10 mm and comprising (a) from 80 to 98% by weight, based on B, of an acrylate rubber having a glass transition temperature of below 0° C. as the graft base, and (b) from 2 to 20% by weight, based on B, of units of at least one polymerisable ethylenically unsaturated monomer which does not form a stable emulsion, the homo- or copolymers of which, produced in the absence of (a), have a glass transition temperature of above 25° C., as graft monomers, characterised in that the graft polymer B is obtainable by grafting monomer (b) on the completely broken latex of (a) suspended in water, in the absence of a suspending agent.
Claim 3
Dependent Claim
44 words
A mixture according to claim 1, characterised in that the mixture consists of from 70 to 98% by weight of component A and from 2 to 30% by weight of component B, in each case based on the total of components A and B.
Claim 4
Dependent Claim
44 words
A mixture according to claim 1, characterised in that the mixture consists of from 75 to 97% by weight of component A and from 3 to 25% by weight of component B, in each case based on the total of components A and B.
Claim 5
Dependent Claim
42 words
A mixture according to claim 1, characterised in that the pulverulent graft polymer is obtainable from 85 to 97% by weight of graft base (a) and from 3 to 15% by weight of graft monomer (b), in each case based on B.
Claim 6
Dependent Claim
25 words
A mixture according to claim 1, characterised in that the average particle size d 50 of B in A is from 0.1 to 2 μm.
Claim 7
Dependent Claim
25 words
A mixture according to claim 1, characterised in that the average particle size d 50 of B in A is from 0.2 to 1 μm.
Claim 8
Dependent Claim
23 words
A mixture according to claim 1, characterised in that the polyester A is selected from the group of polyethylene terephthalate and polybutylene terephthalate.
Claim 9
Dependent Claim
18 words
A mixture according to claim 1, characterised in that the graft base (a) contains a diene rubber core.
Claim 10
Dependent Claim
18 words
A mixture according to claim 1, characterised in that the graft base (a) is an emulsion graft polymer.
Claim 11
Dependent Claim
15 words
A mixture according to claim 1, characterised in that it is reinforced with glass fibres.
References Cited (Backward Citations)
US3944631A
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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) | 1987-05-01 | 1987-10-31 | 1988-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-01 | 1991-10-31 | 1992-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-01 | 1995-10-31 | 1996-05-01 | $7700.00 | Window Closed / Lapsed |