EP0037686A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Impact modifier compositions, their production and thermoplastic polymer compositions containing them
Assignee: Rohm and Haas Co
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Filing: 1981-03-27
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Granted: —
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Expires: 2001-03-27
Abstract
Abstract Etastomeric impact modifier polymer is blended with polymer of at least one of the monomers: esters of acrylic and methacrylic acids, vinyl aromatic monomers such as styrene and substituted styrenes, olefins and unsaturated esters of organic acid; which is effective to substantially reduce gel colonies of impact modifier in formulations with rigid thermoplastic matrix polymers. The impact modification efficiency of the elastomeric modifier is thereby improved. The weight ratio of impact modifier polymer to gel colony reducing polymer is from 99.5:0.5 to 96:4. The blends may be made by mixing emulsions of the polymers and co-spray drying or co-coagulating. Impact modified thermoplastic polymer compositions contain the blend in a weight ratio of 60:40 to 98:2 ofthermoplasticto blend.
Inventors
- 👤 David Lamar Dunkelberger
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 04:40
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/04; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/12; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; C08L67/00; C08L67/02; C08L69/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
82 words
A composition suitable for impact modifying thermoplastic polymer, comprising a blend of (a) elastomeric impact modifier polymer and (b) polymer of at least one of the following monomers: esters of acrylic and methacrylic acids, vinyl aromatic monomers such as styrene and substituted styrenes, olefins and unsaturated esters of organic acids, in a weight ratio of (a) to (b) of 99.5:0.5 to 96:4, said component (b) being effective to substantially reduce gel colonies of impact modifier in formulations with rigid thermoplastic matrix polymer.
Claim 2
Dependent Claim
82 words
A composition suitable for impact modifying thermoplastic polymer, comprising a blend of (a) elastomeric impact modifier polymer and (b) polymer of at least one of the following monomers: esters of acrylic and methacrylic acids, vinyl aromatic monomers such as styrene and substituted styrenes, olefins and unsaturated esters of organic acids, in a weight ratio of (a) to (b) of 99.5:0.5 to 96:4, said component (b) being effective to substantially reduce gel colonies of impact modifier in formulations with rigid thermoplastic matrix polymer.
Claim 3
Dependent Claim
32 words
A composition as claimed in claim 1 wherein component (b) is effective to reduce such gel colonies by at least 50%, preferably at least 90% in an impact modifier-rigid matrix polymer formulation.
Claim 4
Dependent Claim
40 words
A composition as claimed in Claim 1 or 2 wherein said component (b) comprises one or more of the following polymers: poly(butyl acrylate), poly(butyl methacrylate), poly(butyl methacrylate/ styrene), poly(butyl acrylate/styrene), poly(butyl acrylate/methyl methacrylate), poly(butyl acrylate/ butyl methacrylate), and poly(ethyl acrylate).
Claim 5
Dependent Claim
49 words
A composition as claimed in any preceding claim in the form of (i) a mixture of emulsions of components (a) and (b) or in the form of (ii) a powder which has been isolated by spray drying or coagulation from a mixture of emulsions of components (a) and (b).
Claim 6
Dependent Claim
33 words
A blend of impact modifier composition as claimed in any preceding claim and . rigid matrix polymer, the weight ratio of rigid matrix polymer to said impact modifier composition being 60:40 to 98:2.
Claim 7
Dependent Claim
44 words
A composition as claimed in Claim 5 wherein the rigid matrix polymer comprises one vinyl or more of the following polymers:/chloride homo polymer and copolymers, methyl methacrylate homopolymer and copolymers, thermoplastic polyesters, styrene acrylonitrile copolymers, high impact polystyrene, polycarbonate and glutarimide homopolymers and copolymers.
Claim 8
Dependent Claim
33 words
A composition as claimed in any preceding claim wherein component (a) comprises one or more of the following polymers: methacrylate/ butadiene/styrene, acrylonitrile/butadiene/styrene acrylic elastomer-based core shell polymers, and mixed acrylic-butadiene-based elastomer core-shell polymers.
Claim 9
Dependent Claim
22 words
A composition as claimed in any preceding claim wherein the weight ratio of component (a) to component (b) is 99:1 to 97:3.
Claim 10
Dependent Claim
39 words
A process for preparing a composition as claimed in any preceding claim comprising intimately mixing component (a) and component (b) in the appropriate weight ratio by mixing emulsions thereof and coisolating the mixed components by spray drying or coagulation.
Claim 11
Dependent Claim
32 words
A process as claimed in claim 9 wherein the mixture of emulsions is formed by forming component (b) by emulsion polymerisation in the presence of component (a) as an emulsion polymer product.
References Cited (Backward Citations)
No citation records indexed.
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