Copolymer of butyl methacrylate

A copolymer of butyl methacrylate with acrylic acid (AA/BMA) was prepared by Loren Hill, then of North Dakota State University. Its Rn was 6,200 and Rw/Rn was 3.5. The acid value was 68. 

Synonyms copolymer of butyl methacrylate copolymer of isobutyl methacrylate Asbestos... 

A reversible photocontrol of wettability of polymeric materials is possible by a technique developed by Irie and Iga When a copolymer of butyl methacrylate and (2-hydroxyphenyl)-a-(4-vinylphenyl)benzyl alcohol is irradiated with ultraviolet light, fliere is a large increase in the contact angle and wettability of the material. This reverses back to the original structure in the dark... 

Results are presented on the preparation and characterisation of batch anulsion copolymers of butyl methacrylate and... 

Emulsion Polymerization. The principal markets for aqueous dispersion polymers made by emulsion polymerization of methacrylic esters are the paint (qv), paper (qv), textile, floor poHsh, and leather (qv) industries where they are used principally as coatings or binders. Copolymers of methyl methacrylate with either ethyl acrylate or butyl acrylate are most common. 

AH-acryHc (100%) latex emulsions are commonly recognized as the most durable paints for exterior use. Exterior grades are usuaHy copolymers of methyl methacrylate with butyl acrylate or 2-ethyIhexyl acrylate (see Acrylic ester polymers). Interior grades are based on methyl methacrylate copolymerized with butyl acrylate or ethyl acrylate. AcryHc latex emulsions are not commonly used in interior flat paints because these paints typicaHy do not require the kind of performance characteristics that acryHcs offer. However, for interior semigloss or gloss paints, aH-acryHc polymers and acryHc copolymers are used almost exclusively due to their exceUent gloss potential, adhesion characteristics, as weU as block and print resistance. 

Copolymers of methyl methacrylate and butyl acrylate gave polymers that were somewhat tougher and slightly softer than the homopolymers. Materials believed to be of this type were marketed in sheet form by ICI as Asterite for a short while in the 1960s (the name having been recently revived for another product as described in Section 15.2.6). 

A considerable viscosity increase in copolymers of tributylstannyl methacrylate with methyl methacrylate, butyl acrylate and styrene upon prolongated storage has been observed and special agents to eliminate this effect have been proposed 108). It is likely that the destruction of intermolecular coordination complexes formed by involvement of tin and carbonyl groups in comonomer units takes place in this case. 

In a combined MALDI-ToF MS, ion mobility experiment and molecular modelling study, Baker and co-workers [120] studied the sequencing in copolymers of glycidyl methacrylate and butyl methacrylate, Figure 20, with different termination groups. 

Since the hydrophobicity of styrene- or alkyl methacrylate-based monolithic matrices is too high to make them useful for hydrophobic interaction chromatography, porous monoliths based on highly hydrophilic copolymers of acrylamide and methylenebisacrylamide were developed [70,135]. The hydrophobicity of the matrix required for the successful separations of proteins is controlled by the addition of butyl methacrylate to the polymerization mixture. The suitability of this rigid hydrophilic monolith for the separation of protein mixtures is demonstrated in Fig. 21, which shows the rapid separation of five proteins in less than 3 min using a steeply decreasing concentration gradient of ammonium sulfate. 

Figure 42. A plot of proton beam vs electron beam sensitivity for several resist systems. COP is a copolymer of glycidyl methacrylate and ethyl acrylate, PVC is poly (vinylcinnamate), PCS is poly (chlorostyrene), PTBMA is polyO-butyl methacrylate), PVA is poly (vinyl acetate), PMMA is poly (methyl methacrylate). (Reproduced with permission from Ref. 57 J...

Heterogeneity, as in polyblends, has also been observed in random copolymers. F. Kollinsky and G. Markert found phase separation in binary mixtures of copolymers of methyl methacrylate and butyl acrylate. C. Kraus and K. W. Rollmann discovered heterogeneity in blends of random copolymers of butadiene and styrene if they differ by more than 20% in composition. 

Comparable results were observed for the copolymerization of maleic anhydride and methyl methacrylate (8 = 10.8 for copolymer), methyl acrylate (8 = 10.7 for copolymer), and butyl methacrylate (8 = 10.7 for copolymer). However, the copolymers of maleic anhydride and stearyl methacrylate (8 = 10.3) and maleic anhydride and isobutyl methacrylate (8 = 10.4) have lower solubility parameter values, and hence, a slow homogeneous copolymerization was observed when these monomers were copolymerized with maleic anhydride in benzene. 

A1(TPP)CH3 Methyl methacrylate (monomer) Polymethyl methacrylate Solvent benzene, CH2C12 Xlrr > 420 nm 100% conversion can be achieved in the presence of butyl methacrylate a copolymer is formed [115]... 

Some interesting results have been obtained by Russian scientists [320, 321] who studied the influence of composition inhomogeneity on some service properties and supermolecular structures of copolymers. Two samples of copolymers of butyl acrylate with methacrylic acid were synthesized which had a similar average... 

None of the factors that affect particle morphology operate alone. In particular, the mode of monomer addition is an interacting factor. This is illustrated by procedures used to produce core-and-shcll polymers for use in architectural paints [26]. Polymers used for this purpose are primarily copolymers of butyl acrylate with either vinyl acetate or methyl methacrylate. The goal here was to make particles with conventional film-forming polymer shells and cores comprised of less expensive monomers than were used in the shells. In practice, this could mean poly(vinyl acetate) cores inside vinyl acetate/butyl acrylate shells or the same or poly(methyl... 

All the MBA/A(,iV-dialkylamino acrylate copolymers behave similarly to poly(MBA-co-MtA)s (Tables 21 and 25), thus suggesting that the replacement of MtA by A,A(-dialkylamino acrylate co-units does not markedly affect the photoinitiation activity of the system. Accordingly, BMI/A,A(-dialkylamino isobutyrates mixtures exhibit substantially the same activity as MBI alone [118]. Similar results have previously been obtained for 2,2-dimethoxy-2-phenyl acetophenone (DMPA), when additioned with diethylmethylamine, in the UV initiated polymerization of -butyl methacrylate [113]. However, a remarkable shortening of the induction period (to) of UV curing is observed for all the polymeric photoinitiators in the presence of tertiary amines as compared with the low-molecular-weight MBl/A,A(-diatkylamino isobutyrates systems, the maximum effect resulting in the case of MBA/A(,iV-dialkylamino acrylate copolymers (Table 25). 

Figure 6.7.14. Result for a Py-GC/MS analysis of a copolymer of butyl acrylate with low levels of allyl, methyl, and 3-(dimethoxymethylsllyl)propyl methacrylates Interpenetrated with cyclic dimethylsiloxane. Pyrolysis done on 0.4 mg material at 60(f C in He, with the separation on a Carbowax type column.

Positive tone resins based on a photoacid generator and either a random copolymer of tetrahydropyranyl methacrylate and methyl methacrylate [137] or random copolymers of tetrahydropyranyl methacrylate, methyl methacrylate, and t-butyl methacrylate (180) were used for fabrication of 3D microchannel structures [264], Simple placed channels connected to cubic or prismatic trenches, which are open to the surface as well as optical grating structures, comprise a set of several parallel channels placed about 10 pm below the surface with connecting reservoirs on both ends. They were fabricated by positive TP microlithography (Fig. 3.75) [264]. 

Several polymethacrylates, primarily alkyl esters, were compared with a novolac resist in terms of etch rates in CF4 and Ar plasmas. The alkyl groups examined included methyl, terf-butyl, cyclohexyl, norbonyl, adamantyl, and benzyl [226]. The polymerization of alicyclic methacrylates was pioneered by Otsu, who has demonstrated facile polymerization of bulky methacrylates and reported high Tg of this class of polymethacrylates [230]. It has been found that alicyclic polymers exhibit better dry etch resistance than acyclic esters and that the dry etch durability is increased by an increase in the number of rings. Thus, poly(adamantyl methacrylate) is as stable as a novolac resist under dry etch conditions. A 30/70 copolymer of adamantyl methacrylate with ter/-butyl... 

ABS-type resins are used as impact modifiers for PVC, but the resultant blend has insufficient transparency for application in clear bottles. Transparency can be obtained by grafting PMMA onto crosslinked PBD (5) or poly (butyl acrylate) (6) which has been previously grafted onto PS (Diagram 4). In this case the PMMA branch is compatible with PVC by virtue of its solubility parameter, and optical clarity results from suitable component ratios in the graft copolymer so that the refractive index matches that of PVC. The desired results are not obtained if a copolymer of methyl methacrylate and styrene is... 

The latices studied were composed primarily of either polystyrene or a copolymer of -butyl acrylate and methyl methacrylate. Their diameters were of order 0-4yjan. Hydroxyethyl cellulose was the water soluble polymer subjected to detailed investigations, but poly(oxyethylene) and polyacrylamide exhibited a qualitatively similar pattern of flocculation behaviour. Six different samples of hydroxyethyl cellulose were studied, their molecular weights varying from 68 500 to 887 000. 

Some recent NMR studies on the copolymerization of allyl acetate with methyl methacrylate, butyl acrylate, and styrene reported their reactivity ratios (cf Table IXb) [65]. The reported error terms, if we assume them to be standard deviations, are quite large with respect to the ri term. Therefore it is problematic whether these numbers are really meaningful. It would seem to us that the large f-2 terms imply that substantially only homopolymers of these three vinyl monomers form. This situation is modified in the case of allyl methacrylate or allyl acrylate copolymers, as will be mentioned below. With these acrylic derivatives, copolymerization depends on the acrylic bonds primarily with modifications due to the allylic hydrogen. Subsequently, the allylic units in a copolymer of allyl methacrylate with butyl methacrylate, for example, will be the sites for crosslinking. 

By conventional emulsion polymerization procedures, a crosslinked copolymer of butyl acrylate and 1% allyl methacrylate was formed in the presence of methyl methacrylate. Then additional methyl methacrylate is polymerized in the system. The resultant product was a poly(methyl methacrylate) with improved... 

---